ORCID Profile
0000-0002-5400-5988
Current Organisation
Swinburne University of Technology
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Civil Engineering | Structural Engineering | Construction Materials | Structural Engineering | Civil Geotechnical Engineering | Construction Engineering | Construction Engineering | Materials Engineering Not Elsewhere Classified | Mineralogy and Crystallography | Polymers | Composite Materials | Geomechanics | Functional Materials | Geomechanics and Resources Geotechnical Engineering | Resources Engineering and Extractive Metallurgy | Materials Engineering | Mining Engineering | Petroleum and Reservoir Engineering | Engineering Design Methods | Infrastructure Engineering and Asset Management | Civil Engineering Not Elsewhere Classified | Earthquake Engineering | Geodynamics | Geotechnical Engineering | Risk Engineering (excl. Earthquake Engineering) |
ANZSRC Socio-Economic Objective (SEO)
Cement and Concrete Materials | Cement and concrete materials | Civil Construction Design | Management of Solid Waste from Construction Activities | Management of Greenhouse Gas Emissions from Construction Activities | Recycling | Civil Construction Processes | Geothermal Energy Extraction | Oil and Gas Extraction | Civil | Construction Materials Performance and Processes not elsewhere classified | Other | Expanding Knowledge in Engineering | Management of Greenhouse Gas Emissions from Mineral Resource Activities | Management of Solid Waste from Energy Activities | Natural Hazards in Urban and Industrial Environments | Construction processes | Hydrogen-based Energy Systems (incl. Internal Hydrogen Combustion Engines) | Oil Shale and Tar Sands Mining and Extraction | Climate change | Coal Mining and Extraction | Environmentally Sustainable Energy Activities not elsewhere classified | Civil | Road Freight | Road Infrastructure and Networks | Global climate change adaptation measures | Prevention and treatment of pollution | Civil Building Management and Services | Stone, Ceramics and Clay Materials | Metals (e.g. Composites, Coatings, Bonding) | Geothermal Energy | Polymeric materials (e.g. paints)
Related Links
Publications
The effect of different Na2 O and K2 O ratios of alkali activator on compressive strength of fly ash based-geopolymer
Publisher: Elsevier BV
Date: 03-2016
The role of alumina on performance of alkali-activated slag paste exposed to 50 C
Publisher: Elsevier BV
Date: 12-2013
Comparative performance of geopolymers made with metakaolin and fly ash after exposure to elevated temperatures
Publisher: Elsevier BV
Date: 12-2007
A Comparative Study on the Effectiveness of Passive and Free Cooling Application Methods of Phase Change Materials for Energy Efficient Retrofitting in Residential Buildings
Publisher: Elsevier BV
Date: 2017
Suitability of Sarawak and Gladstone fly ash to produce geopolymers: A physical, chemical, mechanical, mineralogical and microstructural analysis
Publisher: Elsevier BV
Date: 06-2016
Shrinkage cracking properties of slag concretes with one-day curing
Publisher: Thomas Telford Ltd.
Date: 02-2008
Abstract: The current paper presents the results of a restrained shrinkage test that captures the shrinkage, tensile creep and tensile stress plotted against strain behaviour of early-age concretes. Four types of concrete mixes were studied: concretes made with ordinary Portland cement (OPC) and slag-blended cements with 35%, 50% and 65% replacement of OPC. Two identical specimens of each mix were tested: one subjected to fully restrained conditions and the other allowed to shrink freely, both under the drying conditions of 23°C and 50% relative humidity at the age of 24 h. Indirect tensile tests were also performed in the same concretes to monitor the tensile strength development. With increasing slag contents, the tensile strength decreased, which is detrimental to crack resistance. However, with increasing slag contents, the elastic modulus also decreased, which is beneficial to crack resistance. The slag content levels did not significantly influence the shrinkage and creep characteristics. Increasing slag levels did not significantly alter the time to cracking behaviours owing to the compensating effects of decreasing tensile strength and elastic modulus.
Thermal and mechanical properties of sustainable lightweight strain hardening geopolymer composites
Publisher: Springer Science and Business Media LLC
Date: 2017
Properties of one-part geopolymer incorporating wollastonite as partial replacement of geopolymer precursor or sand
Publisher: Elsevier BV
Date: 03-2020
Johnson–Mehl–Avrami–Kolmogorov equation for prediction of compressive strength evolution of geopolymer
Publisher: Elsevier BV
Date: 03-2015
Boroaluminosilicate Geopolymers
Publisher: Elsevier
Date: 2017
Stress-strain behaviour and abrupt loss of stiffness of geopolymer at elevated temperatures
Publisher: Elsevier BV
Date: 10-2010
Thermal Performance of Hollow-Core Slab Ventilation System with Macro-Encapsulated Phase-Change Materials in Supply Air Duct
Publisher: MDPI AG
Date: 22-02-2019
Abstract: The aim of this research was to evaluate the effectiveness of phase-change materials (PCMs) incorporated into the supply air duct of a hollow-core slab ventilation system. Both experimental and numerical approaches were adopted in this investigation. In the experimental work, the air was passed through a PCM-incorporated aluminum air duct, and the temperature at various points of the duct was recorded. Computational fluid dynamics models of the PCM-incorporated supply air duct and the hollow-core slab were developed and validated with the respective experimental data. The validated models were used to simulate the performance of PCM-incorporated hollow-core slabs during summer in Melbourne, Australia. The results showed that the reduction in temperature fluctuation varied with the way the PCM was incorporated inside the supply air duct. The temperature difference was maximum and was maintained for a longer period when the PCM was spread to all four internal surfaces of the supply air duct. The results also showed that the effectiveness of the combined PCM–air duct–hollow-core slab system in reducing the temperature fluctuation was lower than the in idual performance of the PCM–air duct and hollow-core concrete slab for a given inlet temperature condition during the simulated period. This was because the integration of PCMs in the supply air duct resulted in a precooling effect which reduced the difference between the litude of slab inlet temperature swing and average slab temperature. As a result, the reduction in temperature fluctuation due to the thermal mass of the hollow-core slab was 21% lower in the presence of PCMs compared to the no-PCM case.
Prediction of the compressive strength of alkali-activated geopolymeric concrete binders by neuro-fuzzy modeling: a case studys
Publisher: Elsevier
Date: 2015
Development of a high strength fly ash-based geopolymer in short time by using microwave curing
Publisher: Elsevier BV
Date: 05-2018
Workability and mechanical properties of alkali activated slag concrete
Publisher: Elsevier BV
Date: 03-1999
Residual compressive behavior of alkali-activated concrete exposed to elevated temperatures
Publisher: Wiley
Date: 2009
DOI: 10.1002/FAM.983
Characteristics of boroaluminosilicate geopolymers
Publisher: Elsevier BV
Date: 11-2014
Comparative deflection hardening behavior of short fiber reinforced geopolymer composites
Publisher: Elsevier BV
Date: 11-2014
Specimens size, aggregate size, and aggregate type effect on spalling of concrete in fire
Publisher: Wiley
Date: 31-07-2017
DOI: 10.1002/FAM.2457
Creep and drying shrinkage of a blended slag and low calcium fly ash geopolymer Concrete
Publisher: Springer Science and Business Media LLC
Date: 24-03-2016
DOI: 10.1617/S11527-015-0599-1
Abstract: The main purpose of this research is to study the time dependent behaviour of a geopolymer concrete. The geopolymer binder is composed of 85.2 % of low calcium fly ash and only 14.8 % of ground granulated blast furnace slag. Both drying shrinkage and creep are studied. In addition, different curing conditions at elevated temperature were used. All experimental results were compared to predictions made using the Eurocode 2. The curing regime plays an important role in the magnitude and development of both creep and drying shrinkage of class F fly ash based geopolymer concrete. A minimum of 3 days at 40 °C or 1 day at 80 °C is required to obtain final drying shrinkage strains similar to or less than those adopted by Eurocode 2 for ordinary Portland cement (OPC) concrete. Creep strains were similar or less than those predicted by Eurocode 2 for OPC concrete when the geopolymer concrete was cured for 3 days at 40 °C. After 7 days at 80 °C, creep strains became negligible.
Properties of high-calcium and low-calcium fly ash combination geopolymer mortar containing recycled aggregate
Publisher: Elsevier BV
Date: 09-2019
Characteristics of Australian brown coal fly ash blended geopolymers
Publisher: Elsevier BV
Date: 12-0003
A mixed methods design for building occupants’ energy behavior research
Publisher: Elsevier BV
Date: 05-2018
Waste Clay Bricks as a Geopolymer Binder for Pavement Construction
Publisher: MDPI AG
Date: 25-05-2022
DOI: 10.3390/SU14116456
Abstract: Geopolymer binders that combine aluminosilicate materials (i.e., precursors) with alkali activators are a viable and environmentally friendly alternative to ordinary Portland cement. While fly ash, slag, silica fume, and metakaolin are the most extensively investigated precursor materials, recent studies demonstrate the feasibility of using low amorphous aluminosilicates (LAA) for geopolymer synthesis. Waste clay bricks (WCB) make an excellent LAA material for producing geopolymer binders, considering their chemical and mineralogical properties. Geopolymer binders with enhanced mechanical properties can be produced either by blending WCB with other aluminosilicate materials or by using WCB as the sole precursor, while providing appropriate production conditions, such as high-temperature curing. Until now, in pavement construction, WCB has been investigated only as a subbase material or as an aggregate for concrete. Since WCB is a potential geopolymer source material, it can also function as an alternative cementitious material (ACM), and stabilizing material in pavement construction. This work reviews the recent studies on producing WCB-based geopolymers, with the focus particularly on the properties of raw materials, activator types and their concentrations, curing conditions, blended geopolymer systems, and the mechanical properties of WCB-based geopolymer binders. Simultaneously, different pavement design requirements and currently available specifications for the use of geopolymer concrete were correlated to evaluate their feasibility as an ACM in pavement construction. Based on the current literature, WCB can be proposed as a suitable ACM to develop pavement-grade concrete and more promising results can be obtained by blending WCB with high-calcium sources, such as slag. Therefore, comprehensive studies on geopolymer concrete development, durability, and field performance are recommended.
A Zeroing Neural Network-Based Approach to Parameter-Varying Platooning Control of Connected Automated Vehicles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Alkali activated materials vs geopolymers: Role of boron as an eco-friendly replacement
Publisher: Elsevier BV
Date: 08-2017
The permeability of geopolymer at down-hole stress conditions: Application for carbon dioxide sequestration wells
Publisher: Elsevier BV
Date: 02-2013
Stress intensity factor against fracture toughness in functionally graded geopolymers
Publisher: Springer Science and Business Media LLC
Date: 09-2015
Study of Technological Advancement and Challenges of Façade System for Sustainable Building: Current Design Practice
Publisher: MDPI AG
Date: 28-09-2023
DOI: 10.3390/SU151914319
Cracking tendency of alkali-activated slag concrete subjected to restrained shrinkage
Publisher: Elsevier BV
Date: 05-2000
Evaluation of an epoxy-bonded steel plating system for strengthening bridge decks
Publisher: Inderscience Publishers
Date: 2003
Factors contributing to early age shrinkage cracking of slag concretes subjected to 7-days moist curing
Publisher: Springer Science and Business Media LLC
Date: 19-06-2008
Identifying the effects of soil and climate types on seasonal variation of pavement roughness using MML inference
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2008
Effects of slag and cooling method on the progressive deterioration of concrete after exposure to elevated temperatures as in a fire event
Publisher: Springer Science and Business Media LLC
Date: 31-08-2011
Use of data mining in the corrosion classification of pipelines in Naphtha Hydro-Threating Unit (NHT)
Publisher: The Pipeline Transport Institute
Date: 31-08-2019
Effects of significant variables on compressive strength of soil-fly ash geopolymer: Variable analytical approach based on neural networks and genetic programming
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2018
Genetic programming in the simulation of Frp-to-concrete patch-anchored joints
Publisher: Elsevier BV
Date: 03-2016
Review of 10 years research on building energy performance gap: Life-cycle and stakeholder perspectives
Publisher: Elsevier BV
Date: 11-2018
Strength development of soil-fly ash geopolymer: Assessment of soil, fly ash, alkali activators, and water
Publisher: American Society of Civil Engineers (ASCE)
Date: 08-2018
Converting hydration heat to achieve cement mixture with early strength and low hydrating-thermal dissipation
Publisher: Elsevier BV
Date: 10-2017
Thermal Energy Storage Enhancement of Lightweight Cement Mortars with the Application of Phase Change Materials
Publisher: Elsevier BV
Date: 2017
Rheological characterization of ultra-high performance concrete for 3D printing
Publisher: Elsevier BV
Date: 02-2023
Microcracking and strength development of alkali activated slag concrete
Publisher: Elsevier BV
Date: 08-2001
Method of optimisation for ambient temperature cured sustainable geopolymers for 3D printing construction applications
Publisher: MDPI AG
Date: 18-03-2019
DOI: 10.3390/MA12060902
Abstract: Since the initial introduction of geopolymers, these materials have been characterised as environmentally-friendly sustainable substitutes for ordinary Portland cement (OPC). There is a routine increase in the application of geopolymers, especially in advanced technologies. Because of its better rheological characteristics compared to OPC, geopolymers are appropriate materials for extrusion-based 3D printing technologies. This paper focuses on the optimisation of an ambient temperature cured geopolymer for 3D printing construction applications. The effects of mixture parameters, including the type of hydroxide solution (HS), the type of silicate solution (SS) and the mass ratio of SS to HS on the workability, extrudability, shape retention ability and mechanical performance of different geopolymer mixtures were investigated. Accordingly, an optimum mixture was identified for geopolymers cured at ambient temperatures. Mechanical properties of the optimised mixture, including flexural and compressive strengths, were measured in different directions with respect to the printed layers. Further, uniaxial tension tests were also conducted on the optimised mixture to measure its interlayer bond strength. The results showed that among the activators investigated, the sodium-based activator composed of sodium hydroxide and sodium silicate solutions, with a SiO2/Na2O ratio of 3.22, was the most effective activator, providing appropriate workability and extrudability, along with reasonable strength and a high shape retention ability. The acquired mechanical properties exhibited anisotropic behaviour in different testing direction. The strength of the interlayer bond was found to be adequate to avoid interfacial shear failure.
Test method for concrete spalling using small electric furnace
Publisher: Wiley
Date: 2010
DOI: 10.1002/FAM.1020
Post-processing Methods to Improve Strength of Particle-Bed 3D Printed Geopolymer for Digital Construction Applications
Publisher: Frontiers Media SA
Date: 04-07-2019
Factors influencing softening temperature and hot-strength of geopolymers
Publisher: Elsevier BV
Date: 02-2012
Modelling the correlation between building energy ratings and heat-related mortality and morbidity
Publisher: Elsevier BV
Date: 04-2016
Assessment of shear capacity methods of steel fiber reinforced concrete beams using full scale prestressed bridge beams
Publisher: Springer Science and Business Media LLC
Date: 14-10-2015
Resistance of alkali-activated slag concrete to carbonation
Publisher: Elsevier BV
Date: 09-2001
A numerical study of triaxial mechanical behaviour of geopolymer at different curing temperatures: An application for geological sequestration wells
Publisher: Elsevier BV
Date: 09-2015
Compressive strength of functionally graded geopolymers: Role of position of layers
Publisher: Elsevier BV
Date: 2015
The influence of water absorption and porosity on the deterioration of cement paste and concrete exposed to elevated temperatures, as in a fire event
Publisher: Elsevier BV
Date: 10-2012
The application of coated superabsorbent polymer in well cement for plugging the microcrack
Publisher: Elsevier BV
Date: 02-2016
Constitutive model for confined high strength concrete subjected to cyclic loading
Publisher: American Society of Civil Engineers (ASCE)
Date: 08-2004
Fabrication and stability of form-stable diatomite/paraffin phase change material composites
Publisher: Elsevier BV
Date: 06-2014
Residual strength properties of sodium silicate alkali activated slag paste exposed to elevated temperatures
Publisher: Springer Science and Business Media LLC
Date: 15-09-2010
Alkaline fused phosphate mine tailings for geopolymer mortar synthesis: Thermal stability, mechanical and microstructural properties
Publisher: Elsevier BV
Date: 05-2019
Assessing the feasibility of integrating form-stable phase change material composites with cementitious composites and prevention of PCM leakage
Publisher: Elsevier BV
Date: 04-2017
Evaluating the passive and free cooling application methods of phase change materials in residential buildings: A comparative study
Publisher: Elsevier BV
Date: 08-2017
High ductile behavior of a polyethylene fiber-reinforced one-part geopolymer composite: A micromechanics-based investigation
Publisher: Springer Science and Business Media LLC
Date: 05-2017
Physical and mechanical properties of lightweight aerated geopolymer
Publisher: Elsevier BV
Date: 03-2015
The Roles of Functional Managers and Project Managers in a Matrix Organization
Publisher: IEEE
Date: 12-2019
Investigating PCM encapsulated NaOH additive for set-on-demand in 3D concrete printing
Publisher: Elsevier BV
Date: 2024
Behavior of combined fly ash/slag-based geopolymers when exposed to high temperatures
Publisher: Wiley
Date: 2009
DOI: 10.1002/FAM.1014
Molecular simulation of water and chloride ion diffusion in nanopores of alkali-activated aluminosilicate structures
Publisher: Elsevier BV
Date: 12-2018
Suitability of polyacrylamide superabsorbent polymers as the internal curing agent of well cement
Publisher: Elsevier BV
Date: 06-2016
Nano reinforced cement and concrete composites and new perspective from graphene oxide
Publisher: Elsevier BV
Date: 12-2014
Limited effect of diameter of fibres on spalling protection of concrete in fire
Publisher: Springer Science and Business Media LLC
Date: 25-08-2012
The properties of fly ash based geopolymer mortars made with dune sand
Publisher: Elsevier BV
Date: 02-2016
Long-term progressive deterioration following fire exposure of OPC versus slag blended cement pastes
Publisher: Springer Science and Business Media LLC
Date: 11-03-2009
Alkali activation of Australian slag cements
Publisher: Elsevier BV
Date: 1999
Low elastic modulus and expansive well cement system: The application of gypsum microsphere
Publisher: Elsevier BV
Date: 03-2016
Chemically graded geopolymer under flexural loading: experimental modelling
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA07174G
Abstract: In a deflected chemically graded geopolymeric specimen, the strain distribution function in the graded region depends on the constituent layers.
Mechanical properties of cement-based materials and effect of elevated temperature on three-dimensional (3-D) printed mortar specimens in inkjet 3-D printing
Publisher: American Concrete Institute
Date: 03-2019
DOI: 10.14359/51714452
Effect of polypropylene fibers on shrinkage and cracking of concretes
Publisher: Springer Science and Business Media LLC
Date: 22-01-2008
Modelling of upheaval buckling of offshore pipeline buried in clay soil using genetic programming
Publisher: Elsevier BV
Date: 10-2015
Influence of Binder Saturation Level on Compressive Strength and Dimensional Accuracy of Powder-Based 3D Printed Geopolymer
Publisher: Trans Tech Publications, Ltd.
Date: 11-2018
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.939.177
Abstract: Powder-based 3D concrete printing (3DCP) process is highly suitable for producing building components and interior structures that can be later assembled on site. The accuracy and strength of 3D printed concrete components heavily rely on printing parameters, among which the binder saturation is the most decisive parameter. This paper reports the effects of binder saturation level on linear dimensional accuracy and compressive strength of 3D printed geopolymer. A geopolymer composition suitable for the powder-based 3DCP process previously developed by the authors was used in this study. 20 mm cubic specimens were printed with five binder saturation levels (75%, 100%, 125%, 150% and 170%). The results indicated that the increase in binder saturation level resulted in significant increase in compressive strengths of both green and post-processed s les in both directions. Nevertheless, the rate of increase in compressive strength of green s les was significantly higher than the post-processed s les. On the other hand, the increase in binder saturation level significantly reduced the linear dimensional accuracy of green s les in all directions. Nonetheless, the rate of reduction in linear dimensional accuracy in Z-direction was lower than the other two directions.
Development of 3D printable engineered cementitious composites with ultra-high tensile ductility for digital construction
Publisher: Elsevier BV
Date: 11-2019
Experimental modelling of chemically graded geopolymer under flexure: load application perpendicular to the graded region
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA09866A
Abstract: Functionally graded regions in geopolymers are made after the chemical diffusion of different mixtures into each other during the vibration and hardening process.
Modelling of fracture strength of functionally graded geopolymer
Publisher: Elsevier BV
Date: 05-2014
Investigation of PCM as retrofitting option to enhance occupant thermal comfort in a modern residential building
Publisher: Elsevier BV
Date: 12-2016
Thermal enhancement of paraffin/hydrophobic expanded perlite granular phase change composite using graphene nanoplatelets
Publisher: Elsevier BV
Date: 06-2018
Factors affecting the performance of metakaolin geopolymers exposed to elevated temperatures
Publisher: Springer Science and Business Media LLC
Date: 31-10-2008
Inclusion of graphene oxide in cementitious composites: state-of-the-art review
Publisher: Informa UK Limited
Date: 20-03-2018
A comparison of the effects of pozzolanic binders on the hardened-state properties of high-strength cementitious composites reinforced with waste tire fibers
Publisher: Elsevier BV
Date: 04-2019
An investigation of the mechanisms for strength gain or loss of geopolymer mortar after exposure to elevated temperature
Publisher: Springer Science and Business Media LLC
Date: 04-2009
Resistance of alkali-activated slag concrete to acid attack
Publisher: Elsevier BV
Date: 10-2003
Durability performance of concrete structures built with low carbon construction materials
Publisher: Elsevier BV
Date: 06-2016
Mechanisms of rheological modifiers for quick mixing method in 3D concrete printing
Publisher: Elsevier BV
Date: 09-2023
Investigation on dispersion of graphene oxide in cement composite using different surfactant treatments
Publisher: Elsevier BV
Date: 02-2018
Mechanical and thermal properties of lightweight geopolymer mortar incorporating crumb rubber
Publisher: Elsevier BV
Date: 09-2018
Geopolymer and Portland cement concretes in simulated fire
Publisher: Thomas Telford Ltd.
Date: 03-2011
DOI: 10.1680/MACR.9.00110
Abstract: High-strength Portland cement concrete has a high risk of spalling in fire. Geopolymer, an environmentally friendly alternative to Portland cement, is purported to possess superior fire-resistant properties. However, the spalling behaviour of geopolymer concrete in fire is unreported. In this paper, geopolymer and Portland cement concretes of strengths from 40 to 100 MPa were exposed to rapid temperature rises, simulating fire exposures. Two simulated fire tests, namely rapid surface temperature rise exposure test and standard curve fire test, were conducted. In both types of test, no spalling was found in geopolymer concretes, whereas the companion Portland cement concrete exhibited spalling. This can be attributed to different pore structures of the two concretes. The sorptivity test found that geopolymer concrete had a significantly higher sorption, therefore more connected pores, than Portland cement concrete when compared at the same strength level. Hence, it is suggested that the water vapour can escape from the geopolymer matrix quicker than in Portland cement concrete, resulting in lower internal pore pressure. The paper concludes that, when compared at the same strength level, the geopolymer concrete possesses higher spalling resistance in a fire than Portland cement concrete due to its increased porosity.
RETRACTED: Thermal shock reactions of Ordinary Portland cement and geopolymer concrete: Microstructural and mechanical investigation
Publisher: Elsevier BV
Date: 2019
Mesh reinforcing method for 3D Concrete Printing
Publisher: Elsevier BV
Date: 2020
Effect of alkali reactions on the rheology of one-part 3D printable geopolymer concrete
Publisher: Elsevier BV
Date: 02-2021
Matrix design of strain hardening fiber reinforced engineered geopolymer composite
Publisher: Elsevier BV
Date: 03-2016
A state-of-the-art review: Near-surface mounted FRP composites for reinforced concrete structures
Publisher: Elsevier BV
Date: 06-2019
Energy saving potential of phase change materials in major Australian cities
Publisher: Elsevier BV
Date: 08-2014
Stress versus strain relationship of high strength concrete under high lateral confinement
Publisher: Elsevier BV
Date: 12-1999
Thermal performance assessment of phase change material integrated cementitious composites in buildings: Experimental and numerical approach
Publisher: Elsevier BV
Date: 12-2017
Extrusion nozzle design and print parameter selections for 3D concrete printing
Publisher: Elsevier BV
Date: 03-2023
Parametric analysis for performance enhancement of phase change materials in naturally ventilated buildings
Publisher: Elsevier BV
Date: 07-2016
Mechanical properties and durability of unconfined and confined geopolymer concrete with fiber reinforced polymers exposed to sulfuric acid
Publisher: Elsevier BV
Date: 08-2019
Efficiency of Different Superplasticizers and Retarders on Properties of ‘One-Part’ Fly Ash-Slag Blended Geopolymers with Different Activators
Publisher: MDPI AG
Date: 18-10-2019
DOI: 10.3390/MA12203410
Abstract: Currently, there are a very limited number of studies on the effect of admixtures on properties of ‘one-part’ geopolymers. This paper reports the effects of different superplasticizers and retarders on fresh and hardened properties of one-part fly ash-slag blended geopolymers made by different solid activators. Two different grades of sodium silicate, namely anhydrous sodium metasilicate powder (nSiO2/nNa2O = 0.9) and GD Grade sodium silicate powder (nSiO2/nNa2O = 2.0) were used as the solid activators. Five different commercially available superplasticizers, including three modified polycarboxylate-based superplasticizers (denoted as PC1, PC2, and PC3) and two naphthalene-based superplasticizers (denoted as N1 and N2), as well as three different retarders, including sucrose, anhydrous borax and a commercially available retarder, were investigated. Workability, setting time and compressive strength of the mixtures without and with addition of each ‘in idual’ admixture were measured. The results showed the effect of admixtures on the properties of the one-part geopolymers significantly depended on the type of solid activator and the type of admixture used. When GD Grade sodium silicate powder was used as the solid activator, all investigated admixtures not only had no positive effect on the workability and setting time, but also significantly reduced the compressive strength of the mixture. However, when anhydrous sodium metasilicate powder was used as the solid activator, the PC1 and sucrose were the best performing superplasticizer and retarder, respectively, causing no reduction in the compressive strength, but significant increase in the workability (up to + 72%) and setting time (up to + 111%), respectively as compared to the mixture with no admixture. In addition, the results also showed that addition of ‘combined’ admixtures (i.e., PC1 in the presence of sucrose) significantly increased the workability (up to + 39%) and setting time (up to + 141%), but slightly reduced the compressive strength (−16%) of the mixture activated by anhydrous sodium metasilicate powder, as compared to the mixture with no admixture.
Durability performance of precast fly ash-based geopolymer concrete under atmospheric exposure conditions
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2018
Offshore pipeline performance evaluation by different artificial neural networks approaches
Publisher: Elsevier BV
Date: 12-2015
Micromechanics constitutive modelling and optimization of strain hardening geopolymer composite
Publisher: Elsevier BV
Date: 06-2017
Effect of Type of Fiber on Inter-Layer Bond and Flexural Strengths of Extrusion-Based 3D Printed Geopolymer
Publisher: Trans Tech Publications, Ltd.
Date: 11-2018
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.939.155
Abstract: Extrusion-based 3D concrete printing is analogous to fused deposition modeling method, which extrudes cementitious materials from a nozzle to build a complex concrete structure layer-by-layer without the use of expensive formwork. This study aims to investigate the influence of type of fiber on inter-layer bond strength and flexural strength of extrusion-based 3D printed geopolymer. An extrudable fly ash-based geopolymer composition previously developed by the authors was reinforced by three types of fibers, namely polyvinyl alcohol (PVA), polypropylene (PP) and polyphenylene benzobisoxazole (PBO) fibers. Control geopolymer specimens with no fiber were also 3D printed for comparison purposes. The results indicated that the incorporation of fibers reduced the inter-layer bond strength of 3D printed geopolymer. This pattern was true regardless of the type of fiber. On the other hand, the flexural strength of 3D printed fiber-reinforced geopolymer mixtures was substantially higher than that of the 3D printed geopolymer with no fiber. The rate of increase in the flexural strength depended on the type of fiber. The flexural failures of the specimens were due to the tensile failure of the bottom layer, rather than the shear failure of the interfaces.
Mini-Beam Test for Assessing the Creep Trend of Paste, Mortar, and Concrete
Publisher: American Society of Civil Engineers
Date: 17-09-2015
Mechanical behaviour of wellbore materials saturated in brine water with different salinity levels
Publisher: Elsevier BV
Date: 03-2014
Strength of geopolymer cured in saline water in ambient conditions
Publisher: Elsevier BV
Date: 05-2013
Prediction of capillary transport of alkali activated slag cementitious binders under unsaturated conditions by elliptical pore shape modeling
Publisher: Springer Science and Business Media LLC
Date: 24-06-2010
Progress, current thinking and challenges in geopolymer foam concrete technology
Publisher: Elsevier BV
Date: 02-2021
Identifying error and maintenance intervention of pavement roughness time series with minimum message length inference
Publisher: Informa UK Limited
Date: 02-2010
Performance of NSM FRP embedded in concrete under monotonic and fatigue loads: state-of-the-art review
Publisher: Informa UK Limited
Date: 03-04-2019
Effects of ultra-fine materials on workability and strength of concrete containing alkali-activated slag as the binder
Publisher: Elsevier BV
Date: 03-1999
Effects of chitosan treatment on strength and thickening properties of oil well cement
Publisher: Elsevier BV
Date: 2015
Surfactants to enable quick nozzle mixing in 3D concrete printing
Publisher: Elsevier BV
Date: 09-2023
Boroaluminosilicate geopolymers: role of NaOH concentration and curing temperature
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA11665H
Abstract: Boroaluminosilicate geopolymers from a fly-ash source have a variety of microstructures. This may be due to different mechanisms of geopolymerization.
Improvement of mechanical properties by incorporating graphene oxide into cement mortar
Publisher: Informa UK Limited
Date: 03-01-2017
Modelling eccentrically loaded high-strength concrete columns
Publisher: Thomas Telford Ltd.
Date: 08-2003
Investigation of the Cause of Disintegration of Alkali-Activated Slag at Temperature Exposure of 50°C
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2011
Synthesis of heat and ambient cured one-part geopolymer mixes with different grades of sodium silicate
Publisher: Elsevier BV
Date: 05-2015
ZnO enhanced NiO-based gas sensors towards ethanol
Publisher: Elsevier BV
Date: 06-2017
Mechanism of early age shrinkage of concretes
Publisher: Springer Science and Business Media LLC
Date: 31-05-2009
Analysis of interfacial debonding of geopolymer annular sealing in CO 2 geo-sequestration wellbore
Publisher: Elsevier BV
Date: 2013
Early age properties of alkali activated brown coal fly ash binders
Publisher: Trans Tech Publications, Ltd.
Date: 05-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.931-932.457
Abstract: The present study evaluates potential re-use options for two different types of brown coal fly ash (class C) sourced from Australia as feedstock for geopolymer binder systems. The study covers analysis of fundamental material and mix-design requirements for geopolymer binders as a basis to achieve durable brown coal ash geopolymer matrices. The study established that reference unblended 100% brown coal ash geopolymer mortar s les yielded low strength, typically below 5MPa and poor durability. However, appropriate blends of brown coal ash with selected black coal fly ash (class F) and blast furnace slag to achieve target Si/Al ratios significantly enhanced both setting characteristics, as well as early age compressive strength development (25-35MPa) while improving overall durability performance compared to reference mixes. Moreover, lagoon fly ash blended geopolymer shows better durability while dry precipitator fails to perform well. The discussion also focuses on key source material parameters and reaction processes that influence compressive strength and durability behaviour of marginal brown coal ash sources during geopolymerisation reactions.
Application of Graphene-Based Nanomaterials as a Reinforcement to Concrete Pavements
Publisher: MDPI AG
Date: 08-09-2022
DOI: 10.3390/SU141811282
Abstract: Nanomaterials are considered to be one of the game-changing features in the modern world and nanotechnology is mostly reputed as the next-generation industrial revolution due to the extraordinary characteristics possessed by them at their very small scale. Graphene and graphene oxide are two main nanoscale materials that have seen a drastic increase in their use in cement-based composites due to exemptional enhancements in terms of strength and durability that can be imparted to compromise the inherent flaws of concrete and other cementitious composites. The main aim of this study was to investigate the effect of graphene and graphene oxide on improving the performance of cement-based composites and, particularly, of continuously reinforced concrete pavements (CRCP), which is one of the emerging trends in the transport sector due to various advantages they bring in over conventional flexible pavements and unreinforced concrete pavements. Fresh, hardened and durability properties of concrete with graphene-based nanomaterials were studied and the past experimental data were used to predict statistical interferences between different parameters attributed to concrete. According to the review, graphene-based nanomaterials seem to be promising to overcome the various CRCP distresses. Simultaneously, the possibilities and hinderances of using graphene and graphene oxide in cement-based composites as a reinforcement are discussed. Finally, the potential of using graphene in continuously reinforced concrete pavements is explored.
Method of enhancing interlayer bond strength in construction scale 3D printing with mortar by effective bond area amplification
Publisher: Elsevier BV
Date: 05-2019
Concrete 3D printing of lightweight elements using hollow-core extrusion of filaments
Publisher: Elsevier BV
Date: 10-2021
Zeta potential, gel formation and compressive strength of low calcium fly ash geopolymers
Publisher: Elsevier BV
Date: 10-2015
Effect of size on the response of cylindrical concrete samples under cyclic loading
Publisher: Elsevier BV
Date: 06-2015
Compressive strength of tungsten mine waste- and metakaolin-based geopolymers
Publisher: Elsevier BV
Date: 05-2014
Strength and shrinkage properties of alkali-activated slag concrete containing porous coarse aggregate
Publisher: Elsevier BV
Date: 04-1999
Development of granular expanded perlite/paraffin phase change material composites and prevention of leakage
Publisher: Elsevier BV
Date: 11-2016
Regulating the chemical foaming reaction to control the porosity of geopolymer foams
Publisher: Elsevier BV
Date: 04-2017
Quantitative proteomics by amino acid labeling in C. elegans
Publisher: Springer Science and Business Media LLC
Date: 28-08-2002
DOI: 10.1038/NMETH.1675
Abstract: We demonstrate labeling of Caenorhabditis elegans with heavy isotope-labeled lysine by feeding them with heavy isotope-labeled Escherichia coli. Using heavy isotope-labeled worms and quantitative proteomics methods, we identified several proteins that are regulated in response to loss or RNAi-mediated knockdown of the nuclear hormone receptor 49 in C. elegans. The combined use of quantitative proteomics and selective gene knockdown is a powerful tool for C. elegans biology.
Predictions of long-term deflection of geopolymer concrete beams
Publisher: Elsevier BV
Date: 09-2015
Chloride ingress and steel corrosion in geopolymer concrete based on long term tests
Publisher: Elsevier BV
Date: 02-2017
Microstructural study of environmentally friendly boroaluminosilicate geopolymers
Publisher: Elsevier BV
Date: 07-2018
Construction application of Fibre/Mesh method for protecting concrete columns in fire
Publisher: Elsevier BV
Date: 06-2011
Behavior of fly ash geopolymer as fire resistant coating for timber
Publisher: Informa UK Limited
Date: 26-11-2019
Steel fibres reinforced 3D printed concrete: Influence of fibre sizes on mechanical performance
Publisher: Elsevier BV
Date: 07-2020
Effect of different superplasticizers and activator combinations on workability and strength of fly ash based geopolymer
Publisher: Elsevier BV
Date: 05-2014
Rheometry for Concrete 3D Printing: A Review and an Experimental Comparison
Publisher: MDPI AG
Date: 08-08-2022
DOI: 10.3390/BUILDINGS12081190
Abstract: The rapid advancement of 3D concrete printing (3DCP) and the development of relevant cementitious material compositions can be seen in the last few decades. The commonly used 3DCP method is to build the structure layer by layer after extruding the material through a nozzle. Initially, the pumping and extrusion of the material should be done with considerable fluidity and workability. The extruded layers should retain their shape immediately after extruding and depositing. While constructing the structure in a layerwise manner, the bottom layers should have enough early age strength to support the layers at the top. Therefore, at different processes in 3DCP, the rheological requirement is contradictory. As the rheology of the material is the deterministic factor which decides the fluidity or workability of the mix, proper rheological characterization should be completed accurately. In some instances, due to the higher stiffness, and higher time and rate-dependent material behavior (thixotropic behavior) compared to the conventional concrete, standard rheology measurement techniques have many limitations when used for 3DCP material. Therefore, non-conventional and novel techniques can be implemented with suitable material models to characterize the rheology of 3DCP material. In this study, a comprehensive review was conducted on conventional and non-conventional methods used for characterizing the rheological parameters for 3DCP material. The previously conducted studies were highlighted with the targeted 3DCP processes in the study (if applicable), and rheological parameters achieved from the test (i.e., yield stress, viscosity, and thixotropy). In addition, some experimental studies were conducted to compare several selected testing methods. The rheological parameters achieved from different test methods were compared to identify the similarities, dissimilarities, pros, and cons between the test methods. Furthermore, the extrudability and buildability studies were conducted for the mixes to demonstrate the usage of the mixes in 3DCP applications and to correlate the achieved rheological parameters with these processes.
Energy saving performance assessment and lessons learned from the operation of an active phase change materials system in a multi-storey building in Melbourne
Publisher: Elsevier BV
Date: 03-2019
A numerical study of CO2 flow through geopolymer under down-hole stress conditions: Application for CO2 sequestration wells
Publisher: Elsevier BV
Date: 09-2014
3D printing eco-friendly concrete containing under-utilised and waste solids as aggregates
Publisher: Elsevier BV
Date: 07-2021
Setting time, compressive strength and sulfuric acid resistance of a high calcium fly ash geopolymer containing borax
Publisher: Faculty of Engineering, Khon Kaen University
Date: 2018
Effect of pore-size distribution on shrinkage of concretes
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2010
Effect of gypsum on free and restrained shrinkage behaviour of slag-concretes subjected to various curing conditions
Publisher: Springer Science and Business Media LLC
Date: 30-11-2008
Direct shear test for the assessment of rheological parameters of concrete for 3D printing applications
Publisher: Springer Science and Business Media LLC
Date: 24-01-2019
Graphene Oxide Impact on Hardened Cement Expressed in Enhanced Freeze–Thaw Resistance
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2016
The application of natural sedimentation for the dispersion of polyacrylamide microspheres
Publisher: Informa UK Limited
Date: 19-09-2016
Application of phase change materials to reduce heat related risks during extreme heat waves in Australian dwellings
Publisher: Elsevier BV
Date: 06-2016
Development of model parameters for early-age properties and crack-width prediction of slag concretes
Publisher: Thomas Telford Ltd.
Date: 06-2009
Abstract: A study to develop the parameters of the models for predicting the deformation characteristics of normal-strength concrete incorporating slag-blended cements at early age is presented in this paper. By comparing with the previous experimental results, it was found that the basic shrinkage and creep factor decreased significantly owing to the expansion of slag concrete during the first week of moist curing. When utilising the developed models for estimating the crack width, it was found that the initial crack width of concrete subjected to restraint drying shrinkage is reduced if the slag content level increased up to 50 and 65% in the concrete mixture. Further, slag concrete tends to have less crack width and lower number of cracks in the long term compared with that with no slag.
Fracture properties of geopolymer paste and concrete
Publisher: Thomas Telford Ltd.
Date: 10-2011
DOI: 10.1680/MACR.2011.63.10.763
Abstract: Geopolymers are an emerging type of cementitious material purported to provide an environmentally friendly alternative to Portland cement-based concrete. This paper reports the results of experimental research on fracture properties (fracture energy and brittleness) of fly ash based geopolymer concrete and paste with various mix parameters. The characteristic length of the geopolymer concrete was approximately three times less than that of ordinary Portland cement (OPC) concrete, due to an increase in tensile splitting strength of about 28%, a decrease in elastic modulus of about 22% and a decrease in fracture energy of about 24%. The difference in characteristic length is similar to that reported between high-strength and normal-strength OPC concretes, indicating that the geopolymer concrete exhibits higher brittleness than its OPC counterpart. This trend was found to be consistent between pastes and concretes, implying that the difference between geopolymer and OPC concrete is due to the type of matrix formation (geopolymerisation or hydration). For geopolymer concretes made with different mix parameters, fracture properties are closely correlated to their compressive strength.
Effect of temperature on permeability of geopolymer: A primary well sealant for carbon capture and storage wells
Publisher: Elsevier BV
Date: 2014
Printability, accuracy and strength of geopolymer made using powder-based 3D printing for construction applications
Publisher: Elsevier BV
Date: 05-2019
Effect of surface moisture on inter-layer strength of 3D printed concrete
Publisher: Elsevier BV
Date: 05-2018
Hardened Properties of 3D Printable Ultra-High Performance Fiber-Reinforced Concrete for Digital Construction Applications
Publisher: Springer International Publishing
Date: 25-08-2019
Identification of Novel Protein Functions and Signaling Mechanisms by Genetics and Quantitative Phosphoproteomics in Caenorhabditis elegans
Publisher: Springer New York
Date: 2014
DOI: 10.1007/978-1-4939-1142-4_9
Abstract: Stable isotope labeling by amino acids combined with mass spectrometry is a widely used methodology for measuring relative changes in protein and phosphorylation levels at a global level. We have applied this method to the model organism Caenorhabditis elegans in combination with RNAi-mediated gene knockdown by feeding the nematode on pre-labeled lysine auxotroph Escherichia coli. In this chapter, we describe in details the generation of the E. coli strain, incorporation of heavy isotope-labeled lysine in C. elegans, and the procedure for a comprehensive global phosphoproteomic experiment.
Properties of 3D-Printable Ductile Fibre-Reinforced Geopolymer Composite for Digital Construction Applications
Publisher: Springer International Publishing
Date: 25-08-2020
Influence and role of feedstock Si and Al content in geopolymer synthesis
Publisher: Informa UK Limited
Date: 17-11-2016
Life-cycle cost analysis of building wall and insulation materials
Publisher: SAGE Publications
Date: 27-06-2019
Abstract: Heat transfer through building opaque envelope is responsible for approximately half of the total heat loss and gain to and from the surroundings. Therefore, insulation materials are commonly used in the building envelope to reduce the heat transfer. Recently, lightweight wall materials with lower thermal conductivity are used in construction along with the commonly used materials such as heavy concrete and earthen materials. In this perspective, there is a need to understand the optimum insulation thickness for different types of building construction materials to minimize unnecessary usage of insulation materials. This study investigated the optimum insulation thickness for different construction materials following a life-cycle approach, where an analytical optimization methodology based on the degree-days method and life-cycle cost analysis was used. In total, 4 insulation materials and 15 building construction materials were considered in the optimization study. The objective function was to minimize life-cycle cost corresponding to the decision variables including insulation thickness and the thermal conductivity of insulation and wall materials. The results showed that the use of insulation in lightweight wall materials is not economically feasible because of their negligible cost-saving potential (below US$2.5/m 2 -year). However, the walls with heavy concrete and earthen materials that have high thermal mass must be insulated due to their highest cost-saving potential (US$14–26.39/m 2 -year).
Modelling of compressive strength of geopolymer paste, mortar and concrete by optimized support vector machine
Publisher: Elsevier BV
Date: 11-2015
Modified 3D printed powder to cement-based material and mechanical properties of cement scaffold used in 3D printing
Publisher: Elsevier BV
Date: 05-2017
Fly ash-based boroaluminosilicate geopolymers: Experimental and molecular simulations
Publisher: Elsevier BV
Date: 04-2017
Stress-strain model for laterally confined concrete
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2005
Predication of Strength-Based Failure in Extrusion-Based 3D Concrete Printing
Publisher: Springer International Publishing
Date: 25-08-2020
Effect of aggregate size on spalling of geopolymer and Portland cement concretes subjected to elevated temperatures
Publisher: Elsevier BV
Date: 11-2012
Effect of Aggregate Size on the Spalling of High-Strength Wall Panels Exposed to Hydrocarbon Fire
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2017
Enhancing Strength of Powder-Based 3D Printed Geopolymers for Digital Construction Applications
Publisher: Springer International Publishing
Date: 25-08-2019
Prediction of convective transport within unsaturated concrete utilizing pore size distribution data
Publisher: Springer Science and Business Media LLC
Date: 13-09-2009
Distribution of oxides in fly ash controls strength evolution of geopolymers
Publisher: Elsevier BV
Date: 11-2016
Paediatric emergency department referrals from primary care
Publisher: CSIRO Publishing
Date: 2016
DOI: 10.1071/AH15211
Abstract: Background Over the last decade, paediatric referrals from general practitioners (GPs) to the emergency department (ED) have increased by 60% in Australia. Objective To investigate the characteristics of Victorian children referred by GPs to the ED with lower-urgency conditions. Method Data were collected from four hospital EDs in Victoria, May–November 2014. Parents attending the ED with their child triaged as lower urgency were surveyed. Descriptive, frequency, and bivariate analyses were performed. Results Of the 1150 responses, 28% (320) visited their GP before attending ED. Of these 66% (212), were referred by their GP. A greater proportion with injury than illness (84% vs 59% P 0.0001) was referred to the ED if they had first visited their GP. Conclusion Motivations of GPs to send lower-urgency injured and ill children to ED are not well understood. The high number of referrals from GPs to the ED for lower urgency conditions suggests attention by policy makers and health professionals must be paid to the current patterns of care of children in general practice. What is known about the topic? Paediatric referrals in Australia from GPs to EDs have increased in the last decade, along with the absolute number of children in Victoria presenting to the ED. What does this paper add? A significant number of children (66%) who attend the GP before visiting the ED are referred to the ED for their lower urgency condition. What are the implications for practitioners? It may be appropriate for GPs to be further supported to manage lower urgency conditions, through better resources or education.
Graphene Oxide as Additive to Replace Using Air-Entraining Agents
Publisher: American Concrete Institute
Date: 12-2017
DOI: 10.14359/51700990
Synergistic effect of combined fibers for spalling protection of concrete in fire
Publisher: Elsevier BV
Date: 10-2010
Effects of mineral admixtures and lime on disintegration of alkali-activated slag exposed to 50 °c
Publisher: Elsevier BV
Date: 11-2014
Relationship between inter-aggregate spacing and the optimum fiber length for spalling protection of concrete in fire
Publisher: Elsevier BV
Date: 03-2012
Mitigation of heat stress risks through building energy efficiency upgrade: a case study of Melbourne, Australia
Publisher: Informa UK Limited
Date: 02-01-2018
Incorporation of graphene oxide and silica fume into cement paste: A study of dispersion and compressive strength
Publisher: Elsevier BV
Date: 10-2016
Method of formulating geopolymer for 3D printing for construction applications
Publisher: Elsevier BV
Date: 11-2016
Post-processing Techniques to Enhance Strength of Portland Cement Mortar Digitally Fabricated Using Powder-Based 3D Printing Process
Publisher: Springer International Publishing
Date: 25-08-2020
Sub- and super-critical carbon dioxide permeability of wellbore materials under geological sequestration conditions: An experimental study
Publisher: Elsevier BV
Date: 06-2013
Durability of low‑calcium fly ash based geopolymer concrete culvert in a saline environment
Publisher: Elsevier BV
Date: 10-2017
Green house gas emissions due to concrete manufacture
Publisher: Elsevier
Date: 2007
Cooperative Control of Multirobot Systems Subject to Control Gain Uncertainty
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2023
Fibre-reinforced boroaluminosilicate geopolymers: A comparative study
Publisher: Elsevier BV
Date: 10-2018
Effect of transient creep on compressive strength of geopolymer concrete for elevated temperature exposure
Publisher: Elsevier BV
Date: 02-2014
Carbonation of a blended slag-fly ash geopolymer concrete in field conditions after 8 years
Publisher: Elsevier BV
Date: 10-2016
The behaviour of iron in geopolymer under thermal shock
Publisher: Elsevier BV
Date: 09-2017
Development of a 3D-Printable Ultra-High Performance Fiber-Reinforced Concrete for Digital Construction
Publisher: MDPI AG
Date: 29-11-2019
DOI: 10.20944/PREPRINTS201911.0377.V1
Abstract: This paper presents the systematic development and performance characterization of a non-proprietary 3D-printable ultra-high-performance fiber-reinforced concrete (UHPFRC) for digital construction. Several fresh and hardened properties of the developed 3D-printable UHPFRC matrix (without fiber) and composite (with 2% volume fraction of steel fibers) were evaluated and compared to that of conventionally mold-cast UHPFRC. Additionally, the effects of testing direction on the compressive and flexural strengths of the printed UHPFRC were investigated. The fresh properties of the UHPFRC developed in this study satisfied the criteria for extrudability, buildability, and shape-retention-ability, which are relevant for ensuring printability. The printed UHPFRC exhibited superior flexural performance to the mold-cast UHPFRC due to alignment of the short fibers in the printing direction. The high compressive and flexural strengths, along with the deflection-hardening behavior, of the developed UHPFRC can enable the production of thin 3D-printed components with significant reduction or complete elimination of conventional steel bars.
Stress-strain relationship of cement mortar under triaxial compression
Publisher: Elsevier BV
Date: 09-2019
Pore gradation effect on Portland cement and geopolymer concretes
Publisher: Elsevier BV
Date: 09-2021
A feasibility study on HPMC-improved sulphoaluminate cement for 3D printing
Publisher: MDPI AG
Date: 29-11-2018
DOI: 10.3390/MA11122415
Abstract: A novel 3D printing material based on hydroxypropyl methylcellulose (HPMC)—improved sulphoaluminate cement (SAC) for rapid 3D construction printing application is reported. The hydration heat, setting time, fluidity of paste and mortar, shape retainability, and compressive strength of extruded SAC mortar were investigated. HPMC dosage, water-to-cement (W/C) ratio, and sand-to-cement (S/C) ratio were studied as the experimental parameters. Hydration heat results reveal HPMC could delay the hydration of SAC. The initial and final setting time measured using Vicat needle would be shortened in the case of W/C ratio of 0.3 and 0.35 with HPMC dosage from 0.5% to 1.5%, W/C ratio of 0.40 with HPMC dosage of 0.5%, 0.75%, and 1.5%, and W/C ratio of 0.45 with HPMC dosage of 0.45, or be extended in the case of W/C ratio of 0.4 with HPMC dosage of 1.0% and W/C ratio of 0.45 with HPMC dosage from 0.75% to 1.5%. Fluidity measurement shows HPMC significantly improves the shape retainability. Furthermore, the addition of HPMC remarkably increased the compressive strength of extruded mortar. The results showed that HPMC could be used to prepare 3D printing SAC having satisfactory shape retainability, setting time and compressive strength.
Effect of pore size distribution on drying shrinkage of alkali-activated slag concrete
Publisher: Elsevier BV
Date: 09-2000
Complete triaxial stress-strain curves of high-strength concrete
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2001
Rapid early age strength development of in-line activated geopolymer for concrete 3D printing
Publisher: Elsevier BV
Date: 11-2023
Effect of strain rate on strength properties of low-calcium fly-ash-based geopolymer mortar under dry condition
Publisher: Springer Science and Business Media LLC
Date: 08-01-2013
Methods of enhancing strength of geopolymer produced from powder-based 3D printing process
Publisher: Elsevier BV
Date: 09-2018
Effect of elevated temperature curing on properties of alkali-activated slag concrete
Publisher: Elsevier BV
Date: 10-1999
Performance of geopolymer high strength concrete wall panels and cylinders when exposed to a hydrocarbon fire
Publisher: Elsevier BV
Date: 04-2017
A novel paraffin/expanded perlite composite phase change material for prevention of PCM leakage in cementitious composites
Publisher: Elsevier BV
Date: 11-2015
Damage behavior of geopolymer composites exposed to elevated temperatures
Publisher: Elsevier BV
Date: 11-2008
Method of Enhancing Interlayer Bond Strength in 3D Concrete Printing
Publisher: Springer International Publishing
Date: 30-08-2019
NMR, XRD, IR and synchrotron NEXAFS spectroscopic studies of OPC and OPC/slag cement paste hydrates
Publisher: Springer Science and Business Media LLC
Date: 07-04-2011
Singularities in RC beam elements with finite-length hinges
Publisher: American Society of Civil Engineers (ASCE)
Date: 1995
Alternative cementitious materials and their composites
Publisher: Hindawi Limited
Date: 2018
DOI: 10.1155/2018/5074636
Effects of graphene oxide in enhancing the performance of concrete exposed to high-temperature
Publisher: Informa UK Limited
Date: 02-01-2017
Inhibition of carbonation attack in cement-based matrix due to adding graphene oxide
Publisher: Informa UK Limited
Date: 02-01-2017
Parent involvement in positive behaviour intervention and supports in Australia: teacher and parent/caregiver perspectives
Publisher: Springer Science and Business Media LLC
Date: 09-01-2023
DOI: 10.1007/S13384-022-00595-4
Abstract: Positive Behaviour Intervention and Supports (PBIS) is a framework for defining, teaching, and supporting appropriate social and academic behaviour in the school setting. This framework is widely implemented across the world, including Australia. Studies evaluating the effectiveness of PBIS confirm a relationship between implementation fidelity and student outcomes. Abundant literature highlights the significance of parent involvement (PI) on children’s social and academic outcomes. However, a consistently and surprisingly under researched component of PBIS is the involvement and influence of parents/caregivers. This article presents the findings of an original qualitative study using stakeholder interviews and artefact analysis to assess parent/caregiver involvement during PBIS implementation in two primary schools in South-West Sydney, Australia. These findings indicate that parent/caregiver involvement in PBIS implementation was interpreted differently by teachers and parents/caregivers and that there is potential for the development of improved methods to engage parents/caregivers more effectively in schools. Reframing parent/caregiver involvement in PBIS to address cultural sensitivities can progressively influence and stabilise this involvement to positively affect the sustainability, effectiveness and fidelity of PBIS. Limitations of the study together with recommendations for future practice are discussed.
Experimental research on using form-stable PCM-integrated cementitious composite for reducing overheating in buildings
Publisher: MDPI AG
Date: 04-03-2019
Abstract: This paper investigates the potential of using form-stable phase change material (FS-PCM) integrated cement mortars in building envelopes to prevent overheating and to improve summer thermal comfort. The FS-PCM integrated cement mortar was applied as the interior surface plastering mortar of a full-scale test hut and compared with identical test huts built on cement plasterboard (OCB) and gypsum plasterboard (GPB). The test huts were exposed to outdoor climatic conditions, and indoor thermal behaviours were continuously monitored throughout the summer period. The effects of PCM in reducing the overheating was analysed by the intensity of thermal discomfort (ITDover) and frequency of thermal discomfort (FTDover) for overheating during the summer days. The comparison between different test huts showed that the application of PCM integrated cement mortars reduced the peak indoor temperature by up to 2.4 °C, compared to GPB and OCB test rooms. More importantly, the analysis of overheating effects revealed that at lower intensive thermal discomfort levels, FS-PCM largely reduces FTDover. As the intensity of thermal discomfort increases, the reduction in ITDover becomes dominant. At highly intensive thermal discomfort levels, the reduction was neither apparent in the intensity of thermal discomfort nor the period of discomfort.
The use of machine learning in boron-based geopolymers: Function approximation of compressive strength by ANN and GP
Publisher: Elsevier BV
Date: 07-2019
The relationship between credit card attributes and the demographic characteristics of card users in China
Publisher: Emerald
Date: 03-10-2016
DOI: 10.1108/IJBM-09-2015-0133
Abstract: The purpose of this paper is to investigate the impact that several of these factors have on a consumer’s decision to hold a credit card, as well as those involved in determining the level of credit card limit. Potential explanatory variables were identified in the literature, then used to build a binary logit model to test the impact of the card and consumer characteristics on credit card ownership. Data were collected via a structured interview of 409 consumers living in Hebei Province, China. The results indicate that convenience in use, level of credit card interest rates, the application process, number of people in the household, a rewards programme, marital status, credit limit and age influence the likelihood of the respondent holding a credit card. Further, an anaylsis shows that the number of credit cards held, duration of holding a credit card, monthly credit card purchasing volume and having a degree at the tertiary level, are significantly and positively related to different levels of credit limit. In summary, in order to attract more consumers to credit card use, the banks and credit card companies should consider making it more convenient for consumers to use their credit cards. Moreover, banks can increase their networking and degree of cooperation with merchants to increase the acceptance of payment by credit card. The most heavily used businesses such as supermarkets and smaller retailers, where consumers purchase goods frequently, would be good targets for banks’ attention. In addition, banks might also improve credit card reward programmes to make these more efficient and perhaps increase the size of the rewards customers can earn through card use.
In-line activation of cementitious materials for 3D concrete printing
Publisher: Elsevier BV
Date: 08-2022
Effect of different mix compositions on apparent carbon dioxide (CO2) permeability of geopolymer: Suitability as well cement for CO2 sequestration wells
Publisher: Elsevier BV
Date: 02-2014
Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste
Publisher: Elsevier BV
Date: 08-2017
Effect of admixtures on properties of alkali-activated slag concrete
Publisher: Elsevier BV
Date: 09-2000
Retrofitting Building Envelope Using Phase Change Materials and Aerogel Render for Adaptation to Extreme Heatwave: A Multi-Objective Analysis Considering Heat Stress, Energy, Environment, and Cost
Publisher: MDPI AG
Date: 27-09-2021
DOI: 10.3390/SU131910716
Abstract: Energy retrofitting the existing building stock is crucial to reduce thermal discomfort, energy consumption, and carbon emissions. However, insulating and enhancing the thermal mass of an existing building wall using traditional methods is a very challenging and expensive task. There is a need to develop a material that can be applied easily in an existing occupied building without much interruption to occupants’ daily life while also having high thermal resistance and heat storage capacity. This study aimed to investigate a potential building wall retrofit strategy combining aerogel render and Phase change materials (PCM) because aerogel render is highly resistive to heat and PCM has high thermal mass. While a number of studies investigated the thermal and energy-saving performances of aerogel render and PCM separately, no study has been done on the thermal and energy-saving performance of the combination of PCM and aerogel render. In this study, the performance of 12 different retrofit strategies, including aerogel and PCM, were evaluated numerically in terms of heat stress, energy savings, peak cooling, emission, and lifecycle cost using a typical single-story Australian house. The results showed that applying aerogel render and PCM on the outer side of the external walls and PCM and insulation in ceilings is the best option considering all performance indicators and ease of application. Compared to the baseline, this strategy reduced severe discomfort hours by 82% in a free-running building. In an air-conditioned building, it also decreased energy use, peak cooling demand, CO2 emission, and operational energy cost by 40%, 65%, 64%, and 35%, respectively. Although the lifecycle cost savings for this strategy were lower than the “insulated ceiling and rendered wall without PCM” case, the former one was considered the best option for its superior energy, emission, and comfort performance. Parametric analysis showed that 0.025 m is the optimum thickness for both PCM and aerogel render, and the 25 °C melting point PCM was optimum to achieve the best results amongst all performance indicators for a typical Australian house in Melbourne climate.
Shrinkage-cracking behavior of OPC-fiber concrete at early-age
Publisher: Springer Science and Business Media LLC
Date: 25-07-2010
Hydration temperatures in large high-strength concrete columns incorporating slag
Publisher: Elsevier BV
Date: 11-2000
Heat Transfer Performance Enhancement of Paraffin/Expanded Perlite Phase Change Composites with Graphene Nano-platelets
Publisher: Elsevier BV
Date: 05-2017
Study of particle packing and paste rheology in alkali activated mixtures to meet the rheology demands of 3D Concrete Printing
Publisher: Elsevier BV
Date: 08-2022
Development of thermal energy storage composites and prevention of PCM leakage
Publisher: Elsevier BV
Date: 12-2014
Thermal properties of geopolymers
Publisher: Elsevier
Date: 2009
Assessment of thermal cracking in concrete roof tiles
Publisher: Elsevier BV
Date: 10-2016
Corrigendum to “Effects of graphene oxide agglomerates on workability, hydration, microstructure and compressive strength of cement paste” [Constr. Build. Mater. 145 (2017) 402–410]
Publisher: Elsevier BV
Date: 08-2018
Triaxial test results of high-strength concrete subjected to cyclic loading
Publisher: Thomas Telford Ltd.
Date: 08-2003
Green house gas emissions due to concrete manufacture
Publisher: Springer Science and Business Media LLC
Date: 02-05-2007
Microstructure, electrical and mechanical properties of steel fibres reinforced cement mortars with partial metakaolin and limestone addition
Publisher: Elsevier BV
Date: 03-2017
Complete triaxial stress-strain curves for geopolymer
Publisher: Elsevier BV
Date: 10-2014
The Spalling of Geopolymer High Strength Concrete Wall Panels and Cylinders Under Hydrocarbon Fire
Publisher: EDP Sciences
Date: 2016
FEA modelling of fracture toughness of steel fibre-reinforced geopolymer composites
Publisher: Elsevier BV
Date: 07-2015
Pathways to Commercialisation for Brown Coal Fly Ash-Based Geopolymer Concrete in Australia
Publisher: MDPI AG
Date: 14-04-2021
DOI: 10.3390/SU13084350
Abstract: Utilising geopolymer as a construction material has gained institutional and commercial interest over the past decade, due to its favourable emissions profile as an alternative to carbon-intensive Ordinary Portland Cement-based concrete, which currently accounts for around 7% of global carbon emissions. While significant research has been performed into the material properties of geopolymer, the commercialisation of the technology is still in its infancy, and several key barriers require rectification to facilitate more widespread adoption. This article analyses the current state of geopolymer commercialisation, paying particular attention to its commercial application in Australia, and it suggests key research areas, in particular relating to the utilisation of abundant and cheap low-quality fly ash sources such as brown coal-based fly ash, to promote its adoption and build on the momentum gained from the small scale in situ pours of geopolymer concrete. Our analysis indicated that in addition to the barriers relating to material properties, economic, social, and regulatory issues also require further inquiry. Our review also indicated that it is critical to update and improve economic analysis of geopolymer utilisation to forecast future costs of both geopolymer and concrete mixes, which are especially critical in determining any potential financial incentives for the construction industry. Moreover, it is essential to study the social attitudes affecting future geopolymer consumption and to update the regulatory standards governing geopolymer utilisation in Australia, such as the initial steps undertaken by the Low Carbon Living Cooperative Research Centre. Based on this review, it is suggested that solving these key issues would help proliferate geopolymer technology and further aid efforts to create a more environmentally sustainable construction industry.
Unsaturated capillary flow within alkali activated slag concrete
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2008
Synthesis of geopolymer from industrial wastes
Publisher: Elsevier BV
Date: 07-2015
Experimental and Numerical Study on Energy Performance of Buildings Integrated with Phase Change Materials
Publisher: Elsevier BV
Date: 05-2017
Flexural strength of plain and fibre-reinforced boroaluminosilicate geopolymer
Publisher: Elsevier BV
Date: 02-2015
Hybrid effects of alumina and silica nanoparticles on water absorption of geopolymers: Application of Taguchi approach
Publisher: Elsevier BV
Date: 2015
The role of graphene oxide in limited long-term carbonation of cement-based matrix
Publisher: Elsevier BV
Date: 04-2018
Effect of Polypropylene Fibre Addition on Properties of Geopolymers Made by 3D Printing for Digital Construction
Publisher: MDPI AG
Date: 22-11-2018
DOI: 10.3390/MA11122352
Abstract: This paper investigates the effect of polypropylene (PP) fibres on the fresh and hardened properties of 3D-printed fibre-reinforced geopolymer mortars. Different percentages of PP fibres ranging between 0.25% and 1.00% by volume were added to an optimised geopolymer mixture. All s les showed reasonable workability and extrudability. In addition, shape-retention ability in the fresh state was investigated as a major requirement for 3D-printing. The compressive strength of the printed specimens was tested in the hardened state in three loading directions, viz. longitudinal, perpendicular, and lateral. The flexural strength of s les was also tested in the longitudinal and lateral directions. In addition, the interlayer bond strength was investigated. Fibre addition seems to influence compressive strengths positively only when the loading is perpendicular to the interface plane. This is due to the preferential fibre alignment parallel to the direction of extrusion. The addition of fibre significantly enhanced the flexural performance of the printed s les. The use of fibre dosages of 0.75 and 1.00 vol % caused deflection-hardening behaviour of the 3D-printed geopolymers and, hence, a significantly higher fracture energy in comparison to specimens without fibre or with lower fibre content. However, an increase in the fibre volume caused some minor reduction in interlayer bond strength. With respect to properties in the fresh state, higher fibre volumes caused better shape-retention ability in the printed s les. The results indicate the possibility of printing fibre-reinforced geopolymers which meet all the necessary properties in both the fresh and hardened states.
Thermal effects of activators on the setting time and rate of workability loss of geopolymers
Publisher: Elsevier BV
Date: 12-2016
Capillary Shape: Influence on Water Transport within Unsaturated Alkali Activated Slag Concrete
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2010
Microscale investigation of fiber-matrix interface properties of strain-hardening geopolymer composite
Publisher: Elsevier BV
Date: 12-2017
Effect of elevated temperatures on geopolymer paste, mortar and concrete
Publisher: Elsevier BV
Date: 02-2010
Recognizing patterns in seasonal variation of pavement roughness using minimum message length inference
Publisher: Wiley
Date: 18-12-2009
Critical parameters of nylon and other fibres for spalling protection of high strength concrete in fire
Publisher: Springer Science and Business Media LLC
Date: 12-08-2011
Sulfate attack on alkali-activated slag concrete
Publisher: Elsevier BV
Date: 02-2002
Modeling of Compressive Strength of Geopolymers by a Hybrid ANFIS-ICA Approach
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2015
The application of sodium hydroxide and anhydrous borax as composite activator of class F fly ash for extending setting time
Publisher: Elsevier BV
Date: 10-2017
Properties of fresh and hardened glass fiber reinforced fly ash based geopolymer concrete
Publisher: Trans Tech Publications, Ltd.
Date: 12-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/KEM.594-595.629
Abstract: This paper evaluates the effects of glass fiber addition on the properties of fresh and hardened fly ash based geopolymer concrete (GPC) activated by 8 M NaOH solution (28.6%) + Na 2 SiO 3 (71.4%) with a SiO 2 /Na 2 O ratio of 2.0. Glass fibers at the dosages of 0.50%, 0.75%, 1.00% and 1.25% by volume of concrete were added to the GPC mix. The properties of fresh and hardened glass fiber reinforced fly ash based GPC in terms of workability, density, compressive and flexural strengths were compared with those of the fly ash based GPC without using glass fiber. The experimental results indicated that inclusion of the glass fibers resulted in decrease of the workability but increase of the density, compressive and flexural strengths of the fly ash based GPC with increased fiber content.
Effects of various carbon additives on the thermal storage performance of form-stable PCM integrated cementitious composites
Publisher: Elsevier BV
Date: 02-2019
Development of thermal energy storage cementitious composites (TESC) containing a novel paraffin/hydrophobic expanded perlite composite phase change material
Publisher: Elsevier BV
Date: 12-2017
A genetic programming predictive model for parametric study of factors affecting strength of geopolymers
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA16286F
Abstract: Genetic programming to present a predictive model for parametric analysis of the factors affecting compressive strength of geopolymers.
Developing of non-linear weight functions for mix design optimization of cementitious systems
Publisher: Elsevier BV
Date: 11-2014
Tensile strain hardening behavior of PVA fiber-reinforced engineered geopolymer composite
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2015
Phase transformations and mechanical strength of OPC/Slag pastes submitted to high temperatures
Publisher: Springer Science and Business Media LLC
Date: 25-05-2008
Damping and microstructure of fly ash-based geopolymers
Publisher: Springer Science and Business Media LLC
Date: 21-12-2013
Strength and shrinkage properties of alkali-activated slag concrete placed into a large column
Publisher: Elsevier BV
Date: 05-1999
Micromechanics-based investigation of a sustainable ambient temperature cured one-part strain hardening geopolymer composite
Publisher: Elsevier BV
Date: 2017
Incorporating graphene oxide in cement composites: A study of transport properties
Publisher: Elsevier BV
Date: 06-2015
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