ORCID Profile
0000-0003-1620-6743
Current Organisation
University of South Australia
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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)
Structural Engineering | Civil Engineering | Construction Materials | Structural engineering | Civil engineering | Infrastructure engineering and asset management | Construction materials |
ANZSRC Socio-Economic Objective (SEO)
Cement and Concrete Materials | Civil Construction Design | Hydrogen-based Energy Systems (incl. Internal Hydrogen Combustion Engines) | Management of Solid Waste from Energy Activities | Metals (e.g. Composites, Coatings, Bonding) | Management of Solid Waste from Manufacturing Activities | Cement Products and Concrete Materials
Related Links
Publications
Microwave radiation treatment to improve the strength of recycled plastic aggregate concrete
Publisher: Elsevier BV
Date: 12-2021
Investigation on Civil Engineering Application of Tyre Encased Soil Element: Laboratory Direct Shear Test and Supply Chain Analysis
Publisher: MDPI AG
Date: 10-11-2022
DOI: 10.3390/SU142214852
Abstract: The reuse of end-of-life (EOL) tyres as earth reinforcement materials in civil engineering projects have been studied for decades. Entire EOL tyres infilled with compacted soil can form segmental tyre encased soil elements (TESEs) with considerable load-bearing capacity. The TESEs can be used to construct structures like low-rise buildings, railway foundations and geotechnical structures. One of the most important aspects of TESE systems, i.e., the shearing interaction between neighbouring units is not yet well understood. In this study, thirty-six laboratory tests have been conducted to investigate the response of TESEs under intercourse shear actions. This was followed by a supply chain environment and economic analysis to investigate the acceptability of the system. The results revealed that the type of encased soil had more effect on the interface interactions between courses of TESEs compared to the TESEs’ construction pattern. It was also found that the frictional coefficient could be increased by either using coarse and angular aggregates as the encased soil or reducing the amount of the encased soil to form a high portion of rubber-to-rubber contact at the composite interface. Supply chain environment and economic analysis revealed that using entire tyres as construction materials has low CO2 emission and considerable economic benefits.
Three-dimensional finite element modeling and theoretical analysis of concrete confined with FRP rings
Publisher: Elsevier BV
Date: 05-2021
Experimental and numerical evaluations on the behaviour of structures repaired using prefabricated FRP composites jacket
Publisher: Elsevier BV
Date: 05-2020
Sorptivity and mechanical properties of fiber-reinforced concrete made with seawater and dredged sea-sand
Publisher: Elsevier BV
Date: 02-2021
Durability of Fibre-Reinforced Calcium Aluminate Cement (CAC)–Ground Granulated Blast Furnace Slag (GGBFS) Blended Mortar after Sulfuric Acid Attack
Publisher: MDPI AG
Date: 29-08-2020
DOI: 10.3390/MA13173822
Abstract: Concrete wastewater infrastructures are important to modern society but are susceptible to sulfuric acid attack when exposed to an aggressive environment. Fibre-reinforced mortar has been adopted as a promising coating and lining material for degraded reinforced concrete structures due to its unique crack control and excellent anti-corrosion ability. This paper aims to evaluate the performance of polyethylene (PE) fibre-reinforced calcium aluminate cement (CAC)–ground granulated blast furnace slag (GGBFS) blended strain-hardening mortar after sulfuric acid immersion, which represented the aggressive sewer environment. Specimens were exposed to 3% sulfuric acid solution for up to 112 days. Visual, physical and mechanical performance such as water absorption ability, sorptivity, compressive and direct tensile strength were evaluated before and after sulfuric acid attack. In addition, micro-structure changes to the s les after sulfuric acid attack were also assessed by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) to further understand the deterioration mechanism. The results show that overall fibre-reinforced calcium aluminate cement (CAC)-based s les performed significantly better than fibre-reinforced ordinary Portland cement (OPC)-based s les as well as mortar s les in sulfuric acid solution in regard to visual observations, penetration depth, direct tensile strength and compressive reduction. Gypsum generation in the cementitious matrix of both CAC and OPC-based systems was the main reason behind the deterioration mechanism after acid attack exposure. Moreover, laboratory sulfuric acid testing has been proven for successfully screening the cementitious material against an acidic environment. This method can be considered to design the service life of concrete wastewater pipes.
Highly sensitive and flexible capacitive elastomeric sensors for compressive strain measurements
Publisher: Elsevier BV
Date: 03-2021
Mitigation of alkali-silica reaction in blast-furnace slag-based alkaline activated material through incorporation of alum water treatment residue
Publisher: Elsevier BV
Date: 11-2023
Utilization of wood waste ash in green concrete production
Publisher: Elsevier
Date: 2022
Non-destructive prediction of strength of concrete made by lightweight recycled aggregates and nickel slag
Publisher: Elsevier BV
Date: 2021
Axial Compression Behaviour of Hybrid Double-Skin Tubular Columns Filled with Rubcrete
Publisher: MDPI AG
Date: 19-06-2019
DOI: 10.3390/JCS3020062
Abstract: Double-skin tubular columns (DSTCs) have become a competitive candidate for column members due to their important advantages compared with conventional reinforced concrete columns, including their better weight-to-strength ratio and ease of construction. Using Rubcrete in hybrid DSTCs is of great interest due to the potential of this system to overcome the Rubcrete material deficiencies and to add more ductility, toughness, seismic resistance, confinement effectiveness, and environmentally-friendly features to that structural system compared to conventional concrete. In this paper, hybrid DSTCs made out of Rubcrete, sandwiched between a fibre reinforced polymer (FRP) tube and a steel tube, were tested. The examined variables were concrete sand or stone replacement ratio (0% and 20%), FRP wall thickness (1- and 2-layers), steel wall thickness (3.2 mm and 4.5 mm), void ratio (50% and 76%), and void shape (circular or square). The axial and lateral stress–strain responses were monitored, measured, and compared. According to this investigation, using Rubcrete in hybrid DSTCs can enhance the axial and hoop strain capacities, especially with fine rubber particles. It was also observed that the adverse influence of using rubber on column ultimate capacity was much lower in DSTC specimens, compared with that of unconfined Rubcrete columns. Therefore, using Rubcrete with fine rubber particles is recommended in DSTC structural columns.
State-of-the-art of prefabricated FRP composite jackets for structural repair
Publisher: Elsevier BV
Date: 10-2020
Compressive behaviour and environmental evaluation of sludge-derived masonry walls
Publisher: Elsevier BV
Date: 12-2021
Practical rubber pre-treatment approch for concrete use-an experimental study
Publisher: MDPI AG
Date: 26-05-2021
DOI: 10.3390/JCS5060143
Abstract: There is a lot of ongoing active research all over the world looking for various applications of used tyre rubber, to increase its utilisation rate. One of the common research applications is to incorporate rubber into concrete as a partial replacement for conventional aggregates. However, due to its poor bonding performance with cement paste, the utilisation of rubber in concrete has been hindered to date. A cost-effective and time-saving rubber pre-treatment method is of great interest, especially for the concrete industry. Out of all the various pre-treatment methods, soaking rubber particles in water is the most cost-effective and least complex method. In addition, sodium sulphate accelerates the hydration reaction of the cement composites. This study looks at the effect of soaking crumb rubber in tap water for short (2 h) and long (24 h) durations, and the optimised duration was then compared with soaking the crumb rubber in a 5% concentration of sodium sulphate solution. Compressive strength, bond behaviour, and rubber/cement interfacial transition zone (ITZ) were investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The results demonstrate that a soaking duration of 2 h provides much better performance in both the strength and bond properties compared to 24-h soaking. A further improvement in the 7-day strength was achieved with the rubber soaked in 5% sodium sulphate solution for 2 h, providing a more practical and economical rubber pre-treatment method for concrete industry use.
Effect of alum sludge ash on the high-temperature resistance of mortar
Publisher: Elsevier BV
Date: 2022
Electronic Structure and Spectro-Structural Correlations of FeIIIZnII Biomimetics for Purple Acid Phosphatases: Relevance to DNA Cleavage and Cytotoxic Activity
Publisher: American Chemical Society (ACS)
Date: 16-11-2010
DOI: 10.1021/IC101433T
Abstract: Purple acid phosphatases (PAPs) are a group of metallohydrolases that contain a dinuclear Fe(III)M(II) center (M(II) = Fe, Mn, Zn) in the active site and are able to catalyze the hydrolysis of a variety of phosphoric acid esters. The dinuclear complex [(H(2)O)Fe(III)(μ-OH)Zn(II)(L-H)](ClO(4))(2) (2) with the ligand 2-[N-bis(2-pyridylmethyl)aminomethyl]-4-methyl-6-[N'-(2-pyridylmethyl)(2-hydroxybenzyl) aminomethyl]phenol (H(2)L-H) has recently been prepared and is found to closely mimic the coordination environment of the Fe(III)Zn(II) active site found in red kidney bean PAP (Neves et al. J. Am. Chem. Soc. 2007, 129, 7486). The biomimetic shows significant catalytic activity in hydrolytic reactions. By using a variety of structural, spectroscopic, and computational techniques the electronic structure of the Fe(III) center of this biomimetic complex was determined. In the solid state the electronic ground state reflects the rhombically distorted Fe(III)N(2)O(4) octahedron with a dominant tetragonal compression aligned along the μ-OH-Fe-O(phenolate) direction. To probe the role of the Fe-O(phenolate) bond, the phenolate moiety was modified to contain electron-donating or -withdrawing groups (-CH(3), -H, -Br, -NO(2)) in the 5-position. The effects of the substituents on the electronic properties of the biomimetic complexes were studied with a range of experimental and computational techniques. This study establishes benchmarks against accurate crystallographic structural information using spectroscopic techniques that are not restricted to single crystals. Kinetic studies on the hydrolysis reaction revealed that the phosphodiesterase activity increases in the order -NO(2) ←Br ←H ←CH(3) when 2,4-bis(dinitrophenyl)phosphate (2,4-bdnpp) was used as substrate, and a linear free energy relationship is found when log(k(cat)/k(0)) is plotted against the Hammett parameter σ. However, nuclease activity measurements in the cleavage of double stranded DNA showed that the complexes containing the electron-withdrawing -NO(2) and electron-donating -CH(3) groups are the most active while the cytotoxic activity of the biomimetics on leukemia and lung tumoral cells is highest for complexes with electron-donating groups.
Stress-Strain Behaviour and Mechanical Strengths of Concrete Incorporating Mixed Recycled Plastics
Publisher: MDPI AG
Date: 30-05-2021
DOI: 10.3390/JCS5060146
Abstract: Different types of recycled plastic have been used in concrete and most studies have focused on the behaviour of a single type of plastic. However, separating plastic wastes increases the cost and time of processing. To tackle this problem, this research presents an experimental investigation to determine the effect of incorporating different combinations of three types of recycled plastic waste aggregates—Polyethylene terephthalate (PET), High Density Polyethylene (HDPE) and Polypropylene (PP)—at different replacement ratios of coarse aggregate on physical and mechanical properties of concrete. The combinations include two plastic types at 10% and 20% replacement ratios and three plastic types at 15% and 30% replacement ratios. The performance of the plastic concrete was assessed based on various physical and mechanical properties including workability, fresh and dry densities, air content, compressive, indirect tensile and flexural strengths, modulus of elasticity, stress-strain behaviour and ultrasonic pulse velocity. It is found that the workability of Mixed Recycled Plastic Concrete (MRPC) at a low replacement rate is independent of the type of plastic. The minimum reduction in the compressive strength, indirect tensile and modulus of elasticity were achieved by R3 (PET + PP) at 10% replacement, while R5 (HDPE + PP) at 10% replacement achieved the highest flexural strength and ultrasonic pulse velocity values. The findings suggest that the mixed recycled plastics have a good possibility to partially replace coarse aggregates in concrete which will benefit the plastics recycling community and environment. Furthermore, the study will provide guidance to the concrete industry concerning the effect of the implementation of unsorted mixed types of plastic as coarse aggregates in the production of concrete.
Experimental investigation of GFRP-RC beams with Polypropylene fibers and waste granite recycled aggregate
Publisher: Elsevier BV
Date: 04-2023
FRP bar-reinforced ultra-high-performance concrete plates with a grouting sleeve connection: Development and flexural behavior
Publisher: Elsevier BV
Date: 07-2023
Durable cement/cellulose nanofiber composites prepared by a facile approach
Publisher: Elsevier BV
Date: 2022
Numerical simulation of the mechanical behaviour of porous concrete
Publisher: Emerald
Date: 15-11-2011
DOI: 10.1108/02644401111178992
Abstract: Porous concrete is a mixture of open‐graded coarse aggregate, water and cement. It is also occasionally referred to as no‐fines concrete or pervious concrete. Due to its high infiltration capacity, it is viewed as an environmentally sustainable paving material for use in urban drainage systems since it can lead to reduced flooding and to the possibilities of stormwater harvesting and reuse. However, the high porosity is due in the main part to the lack of fine aggregate particles used in the manufacture of porous concrete. The purpose of this paper is to present a numerical method to understand more fully the structural properties of porous concrete. This method will provide a useful tool for engineers to design with confidence higher strength porous concrete systems. In the method, porous concrete is modelled using a discrete element method (DEM). The mechanical behaviour of a porous concrete s le subjected to compressive and tensile forces is estimated using two‐dimensional Particle Flow Code (PFC2D). Three numerical ex les are given to verify the model. A comprehensive set of micro‐parameters particularly suitable for porous concrete is proposed. The accuracy and effectiveness of simulation are confirmed by comparison with experimental results and empirical equations. The experimental investigations for porous concrete described in this paper have been designed and conducted by the authors. In addition, the type of two dimensional PFC analysis presented has rarely been used to model porous concrete strength characteristics and from the results presented in this paper, this analysis technique has good potential for predicting its mechanical properties.
A review of aerogels and their application as a multi-functional building material
Publisher: Trans Tech Publications, Ltd.
Date: 12-2013
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.253-255.564
Abstract: This paper will provide a review of the current research on the material characterisation and mechanical behaviour of polymer enhanced silica aerogels. Aerogels have been in existence for many years however, the engineering applications of aerogels have been limited due to their poor mechanical behaviour. Recently a new type of polymer enhanced silica aerogel, a nanostructured form of silica has been developed. The new material is having a low density, very low thermal conductivity, excellent acoustic insulation and high mechanical which makes it ideal for energy efficient building material. This paper will discuss the start-of-the-art development of this material and issues to apply the material in energy efficient buildings.
Strength and drift capacity of squat recycled concrete shear walls under cyclic loading
Publisher: Elsevier BV
Date: 10-2015
Experimental Capacity Assessment of Cold-Formed Boxed Stud and C Stud Wall Systems Used in Australian Residential Construction
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2006
Bending and Shear Behaviour of Waste Rubber Concrete-Filled FRP Tubes with External Flanges
Publisher: MDPI AG
Date: 29-07-2021
Abstract: An innovative beam concept made from hollow FRP tube with external flanges and filled with crumbed rubber concrete was investigated with respect to bending and shear. The performance of the rubberised-concrete-filled specimens was then compared with hollow and normal-concrete-filled tubes. A comparison between flanged and non-flanged hollow and concrete-filled tubes was also implemented. Moreover, finite element simulation was conducted to predict the fundamental behaviour of the beams. The results showed that concrete filling slightly improves bending performance but significantly enhances the shear properties of the beam. Adding 25% of crumb rubber in concrete marginally affects the bending and shear performance of the beam when compared with normal-concrete-filled tubes. Moreover, the stiffness-to-FRP weight ratio of a hollow externally flanged round tube is equivalent to that of a concrete-filled non-flanged round tube. The consideration of the pair-based contact surface between an FRP tube and infill concrete in linear finite element modelling predicted the failure loads within a 15% margin of difference.
A Review of Current Design and Construction Practice for Road Kerbs and a Sustainability Analysis
Publisher: MDPI AG
Date: 21-01-2022
DOI: 10.3390/SU14031230
Abstract: Kerb is an integral part of road infrastructure and performs several important functions, including providing stability to the edges of the road and providing effective drainage. Their performance can significantly influence the behaviour and service life of a road. The design conditions, construction materials and their sustainability can be important to assess from an asset management and sustainable construction point of view even though this area has been paid limited research attention in the past. This paper reviews the available literature on the design and construction considerations for kerbs and critically analyses them with a special focus on sustainable construction practice. The different materials commonly used around the world for the construction of kerb in terms of their properties, failure and available design guidelines have been discussed along with their management practice. Special situations, such as expansive soil movement and tree root-related problems, have also been considered, and the current guidelines for designing in such situations have also been discussed. A carbon footprint and sustainability analysis has been conducted on the current practice of using natural aggregate concrete and compared against several potential alternatives. The review of the design process indicated that the current practice relies on over-simplified design procedures and identified scopes for improvement, especially with the incorporation of mechanical behaviour of the material being used in construction. The carbon footprint and sustainability analysis indicated that the use of alternative materials could result in significant savings in the kerb construction industry’s carbon footprint.
Seismic behavior of brick cave dwellings: Shake table tests
Publisher: Elsevier BV
Date: 11-2021
Experimental study on multi-panel retrofitted steel transmission towers
Publisher: Elsevier BV
Date: 11-2012
Effects of seawater and sea-sand on concrete properties: a review paper
Publisher: Springer Singapore
Date: 23-12-2021
Structural analysis of a 3D dry-stack tyre wall by finite-discrete element method
Publisher: Elsevier BV
Date: 04-2023
Seismic behavior of novel GFRP bar reinforced concrete beam-column joints internally reinforced with an FRP tube
Publisher: Elsevier BV
Date: 12-2022
Recycling of landfill wastes (tyres, plastics and glass) in construction – A review on global waste generation, performance, application and future opportunities
Publisher: Elsevier BV
Date: 10-2021
Comparative study on properties of kerb concrete made from recycled materials and related carbon footprint
Publisher: Elsevier BV
Date: 08-2023
Durability assessment of GFRP bars exposed to combined accelerated aging in alkaline solution and a constant load
Publisher: Elsevier BV
Date: 12-2023
Dynamic analysis of beams on an elastic foundation subjected to moving loads
Publisher: Elsevier BV
Date: 11-1996
Geometrically modified auxetic polyurethane foams and their potential application in impact mitigation of masonry structures
Publisher: Elsevier BV
Date: 12-2021
Optimisation of limestone calcined clay cement based on response surface method
Publisher: Springer Nature Singapore
Date: 2023
DOI: 10.1007/978-981-99-3330-3_13
Abstract: Limestone calcined clay cement (LC3) is a new type of cement that contains Portland cement, calcined clay, and limestone. Compared with traditional cement clinker, LC3 reduces CO 2 emissions by up to 40%, and is a promising technology for the cement industry to achieve its emission target. We used a numerical approach to predict the optimum composition of LC3 mortar. The experiments were performed using central composite rotational design under the response surface methodology. The method combined the design of mixtures and multi-response statistical optimization, in which the 28-day compressive strength was maximized while the CO 2 emissions and materials cost were simultaneously minimized. The model with a nonsignificant lack of fit and a high coefficient of determination (R 2 ) revealed a well fit and adequacy of the quadratic regression model to predict the performance of LC3 mixtures. An optimum LC3 mixture can be achieved with 43.4% general purpose cement, 34.16% calcined clay, 20.6% limestone and 1.94% gypsum.
Flaxseed enriched diet-mediated reduction in ovarian cancer severity is correlated to the reduction of prostaglandin E-2 in laying hen ovaries
Publisher: Elsevier BV
Date: 09-2013
Stakeholder contribution to tourism collaboration: Exploring stakeholder typologies, networks and actions in the cluster formation process
Publisher: Elsevier BV
Date: 09-2022
Durability Assessment of Pen/Pet Frp Composites Based on Accelerated Aging in Alkaline Solution/Seawater with Different Temperatures
Publisher: Elsevier BV
Date: 2021
DOI: 10.2139/SSRN.3970699
Recent progress in buckling restrained braces: A review on material development and selection
Publisher: SAGE Publications
Date: 25-03-2022
DOI: 10.1177/13694332221082730
Abstract: Passive energy dissipation devices are a widely accepted solution used to improve the response of the structures under seismic conditions. While several types of passive energy dissipation elements have been proposed for replaceable elements, buckling restrained braces (BRB) was one of the most effective replaceable elements which has been used to retrofit frame structures in the past few years. A traditional BRB consists of a steel brace core with a cruciform cross section that is surrounded by a stiff steel tube (restraining unit) and unbonded materials to ensure the brace to move freely. The region between the tube and brace is filled with concrete-like materials. In recent years, a significant amount of research has been carried out on new types of BRBs which are more efficient and inexpensive. This paper presents an overview of recent advances in the development of BRB materials and buckling mechanism, with an emphasis on the material development for the restraining unit. The application of fibre-reinforced polymer (FRP) as restraining unit in BRB is highlighted.
A new dispersion strategy to achieve high performance graphene-based cement material
Publisher: Springer Nature Singapore
Date: 2023
DOI: 10.1007/978-981-99-3330-3_23
Abstract: The addition of graphene and its derivatives can enhance the mechanical and functional properties of cement-based composites, but most of the current technologies have limited dispersion and are costly. The creation of a cost-effective graphene-reinforced cement material with uniform graphene dispersion remains difficult. We used glucose as an economical carbon source to induce the in-situ formation of graphene on cement particles. Our proposed method is approximately 80% less expensive than commercial techniques. Evaluation of the microscopic morphology demonstrated uniform distribution of graphene in the cement matrix, which improved the mechanical properties of the cement paste. The compressive strengths of the test groups with 3% carbon source improved by almostly 38% and 48.9%, respectively, compared with pure cement paste. This newly established technique is essential for the future design of excellent graphene-based cement materials and the achievement of multifunctional cementitious applications.
Prediction of residual behaviour for post-earthquake damaged reinforced concrete column based on damage distribution model
Publisher: Elsevier BV
Date: 05-2021
Development of high-strength light-weight cementitious composites with hollow glass microspheres
Publisher: Springer Nature Singapore
Date: 2023
DOI: 10.1007/978-981-99-3330-3_25
Abstract: Achieving both light-weight and high-strength cementitious composites (HSLWCCs) is challenging. In this study, hollow glass microspheres (HGMs) were used to develop a HSLWCC. Different amounts of HGMs were incorporated in the cement mixture and the associated effects on the engineering properties and microstructure were investigated. The results showed that the density and strength decreased with increasing HGM content. Compressive strength of the HSLWCC decreased significantly when the HGM content increased from 30 to 40% and decreased slightly with further increasing HGM content, while the density generally reduced linearly with increasing HGM content. Structural efficiency of the HSLWCC increased when the HGM content was 30% and then decreased significantly at HGM content of 40%. In particular, a floatable cementitious composite with a density of ~970 kg/m 3 and compressive strength of ~31 MPa was developed by incorporating 60% of HGMs. Additionally, two failure modes (i.e., (i) debonding of interface and (ii) crush of HGM) were found in the high-strength light-weight cementitious composite (HSLWCC), with the former dominating in HSLWCC with high HGM content and the later dominating in HSLWCC with low HGM content.
FRP-confined concrete columns with a stress reduction-recovery behavior: A state-of-the-art review, design recommendations and model assessments
Publisher: Elsevier BV
Date: 10-2023
Axial Behaviour of Damaged Concrete Columns Repaired with Novel Prefabricate FRP Jacket
Publisher: Springer International Publishing
Date: 27-11-2022
Bond behavior between GFRP bars and seawater sea-sand fiber-reinforced ultra-high strength concrete
Publisher: Elsevier BV
Date: 03-2022
Investigation of the free vibration behaviour of an innovative GFRP sandwich floor panel
Publisher: Elsevier BV
Date: 12-2012
Push-off and Pull-out Bond Behaviour of CRC Composite Slabs – An Experimental Investigation
Publisher: Elsevier BV
Date: 02-2021
A new in-situ growth strategy to achieve high performance graphene-based cement material
Publisher: Elsevier BV
Date: 06-2022
Application of rubberized cement-based composites in pavements: Suitability and considerations
Publisher: Elsevier BV
Date: 10-2019
Influence Of Single And Multiple Skin-Core Debonding On Free Vibration Characteristics Of Innovative Gfrp Sandwich Panels
Publisher: Zenodo
Date: 2015
Numerical and comparative study of earthquake intensity indices in seismic analysis
Publisher: Wiley
Date: 28-02-2011
DOI: 10.1002/TAL.693
Buckling Analysis of Laminated Composite Plate on Tensionless Elastic Foundations under Uniaxial Compression
Publisher: World Scientific Pub Co Pte Lt
Date: 06-2018
DOI: 10.1142/S0219455418500797
Abstract: This paper addresses the compressive local buckling behavior of an infinitely long laminated composite plate resting on a tensionless elastic foundation (Winkler foundation). The analytical solution to the contact buckling coefficient of a laminated composite plate is derived using a one-dimensional analytical method. Numerical ex les are considered to investigate the influence of the ply angle and foundation stiffness on the contact buckling coefficients of laminated composite plates under uniaxial compression. The lateral boundary conditions including cl ed and simply-supported edges are treated. Finally, finite element (FE) analysis is conducted to provide an independent check on the analytical solutions.
Multi-objective design optimization of an innovative fibre composite sandwich panel for civil engineering applications
Publisher: CRC Press
Date: 18-11-2010
DOI: 10.1201/B10571-145
Feasibility of Using the Hollow Glass Microsphere to Develop Lightweight CAC-GGBFS-Blended Strain-Hardening Cementitious Composites
Publisher: Frontiers Media SA
Date: 29-10-2021
DOI: 10.3389/FMATS.2021.752720
Abstract: Strain hardening cementitious composites (SHCCs) with superior tensile strength and ductility have been utilized as an effective repair material. A corrosion-resistant binder, calcium aluminate cement (CAC)–ground granulated blast-furnace slag (GGBFS) blends, has been introduced into SHCC to expand its application in the concrete sewage network rehabilitation. As a repair material, the lightweight property is particularly favorable as it can broaden its functionality. This article presents a study on developing a novel lightweight CAC-GGBFS-blended SHCC using hollow glass microsphere (HGM), namely, HGMLW-SHCCs. The fine silica sand content was substituted with HGM at 25, 50, 75, and 100 vol% in HGMLW-SHCC. We examined flowability, density, uniaxial compressive behavior, direct tensile behavior, and pseudo strain-hardening indices. Microstructure analysis was also conducted to understand the meso-scale behavior of this new lightweight composite. The newly developed HGMLW-SHCC had a 28-day density of only 1756 kg/m 3 . Compressive and tensile strengths were determined in the range of 62.80–49.39 MPa and 5.81–4.19 MPa, respectively. All mixtures exhibited significant strain-hardening behavior. Even though the increased HGM content negatively affected the tensile strength of HGMLW-SHCC, it had a positive effect on its ductility. In addition, HGM can reduce crack width and tensile stress fluctuations significantly. The results showed that HGM was a promising material for producing strong and lightweight corrosion-resistant SHCCs to be used as a retrofitting material in the wastewater industry.
Progress in Textile Reinforced Ductile Cementitious Composite for Structural Retrofitting
Publisher: Iris Publishers LLC
Date: 05-08-2019
Composite walls composed of profiled steel skin and foam rubberized concrete subjected to eccentric compressions
Publisher: Elsevier BV
Date: 04-2022
Photocatalytic construction materials: an overview of recent developments and their application to permeable concrete
Publisher: CRC Press
Date: 18-11-2010
DOI: 10.1201/B10571-149
Experimental study on the mechanical performance of tyre encased soil elements for structural wall applications
Publisher: Elsevier BV
Date: 07-2023
Experimental investigation of basalt textile reinforced engineered cementitious composite under apparent hoop tensile loading
Publisher: Elsevier BV
Date: 05-2019
Creep and drying shrinkage behaviour of crumb rubber concrete (CRC)
Publisher: Informa UK Limited
Date: 18-05-2020
A force method model for static analysis of transmission line system subjected to in-plane and out-of-plane loadings
Publisher: Trans Tech Publications, Ltd.
Date: 10-2012
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.368-373.3535
Abstract: In this paper, transmission line systems are modeled as multi-span cable structures. A force method model is proposed for analysing the static response of the multi-span cables with small sags. The accepted cable model reduces to two groups of differential equations (the equilibrium equations in y, z directions) and an integral equation (the compatibility equation). Substituting the differential equation solutions into the compatibility condition, the governing equation is obtained in terms of the tension component in chord direction. This equation has been named the force method equation (FME). In this way the infinite-degree-of-freedom dynamic system is effectively simplified to a system with only one unknown. Finally, one ex le is presented to illustrate the application of the proposed force method.
Finite element model for tapered three layers composite columns (Stobie poles)
Publisher: Elsevier BV
Date: 09-2022
Performance evaluation of composite concrete-filled steel tube columns by steel fibers and different cross-section shapes: experimental and numerical investigations
Publisher: Elsevier BV
Date: 2023
Properties of the interfacial transition zone in rubberised concrete – an investigation using nano-indentation and EDS analysis
Publisher: Elsevier BV
Date: 10-2023
Mechanical performance and durability of geopolymer lightweight rubber concrete
Publisher: Elsevier BV
Date: 2022
Cement nanocomposites containing montmorillonite nanosheets modified with surfactants of various chain lengths
Publisher: Elsevier BV
Date: 02-2021
One-step random-walk process of nanoparticles in cement-based materials
Publisher: Springer Science and Business Media LLC
Date: 06-2021
Evaluation of Permeability of Porous Concrete
Publisher: Trans Tech Publications, Ltd.
Date: 07-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.295-297.873
Abstract: One of the most important characteristics of porous concrete is the ability to capture and transport water. The permeability of porous concrete is therefore needs to be evaluated. This paper will investigate various methods for testing the permeability of porous concrete and compares the different results from falling head and constant head tests. The hydraulic theories were then applied into the analysis to determine the permeability of the porous concrete s les.
Bending behaviour of precast concrete slab with externally flanged hollow FRP tubes
Publisher: Elsevier BV
Date: 08-2021
A comprehensive review on the mechanical properties of waste tire rubber concrete
Publisher: Elsevier BV
Date: 03-2020
Bond behaviour of steel-reinforcing bars in Crumb Rubber Concrete (CRC)
Publisher: Informa UK Limited
Date: 22-10-2019
Behaviour of FRP spiral-confined concrete and contribution of FRP longitudinal bars in FRP-RC columns under axial compression
Publisher: Elsevier BV
Date: 04-2023
Laboratory Evaluation of the Stress-Strain relationship of Permeable Concrete
Publisher: Trans Tech Publications, Ltd.
Date: 05-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.243-249.3259
Abstract: The authors conducted research aimed at developing a new type of permeable concrete material with enhanced structural strength. This paper presents and discusses the results of their investigation on the unaxial compressive stress-strain relationship of porous concrete made with two different mix designs with constant water to cement ratio. The concrete mixes were designed with a target compressive strength between 15-25 MPa and target porosity between 10-15% to study the effect of pore sizes on the stress-strain curve. The average pore space was increased by increasing the relative amount of large aggregate. The reduction in the relative amount of fine aggregate increased the average pore space and resulted in a reduction in mix stiffness and a marginal increase in ultimate strength.
Evaluation of concrete performance with different types of recycled plastic waste for kerb application
Publisher: Elsevier BV
Date: 07-2021
Recycling drinking water treatment sludge into eco-concrete blocks with CO2 curing: Durability and leachability
Publisher: Elsevier BV
Date: 12-2020
The implementation of statistical inference to study the bending strength of sustainable hybrid sandwich panel composite
Publisher: Trans Tech Publications, Ltd.
Date: 05-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.250-253.956
Abstract: The study reported here involves the evaluation of the ultimate bending stress (bending strength) of hybrid sandwich panels using a simple comparative statistical analysis. Four sets of beam were tested with each set consisting of modified beams (MB) and unmodified beam (UB) s les. A total of 42 beam s les were tested using 3 point bending followed by statistical inference analysis using a t-test. The results show that the introduction of an intermediate layer has a significant effect on increasing the bending strength of the new hybrid sandwich panel composite.
Novel ultra-high-performance concrete composite plates reinforced with FRP grid: Development and mechanical behaviour
Publisher: Elsevier BV
Date: 08-2021
The structural behavior of hybrid structural insulated panels under pure bending load
Publisher: International Journal of Technology
Date: 31-10-2017
Development of Crumb Rubber Concrete for Practical Application in the Residential Construction Sector – Design and Processing
Publisher: Elsevier BV
Date: 11-2020
Analysis of tapered three-layered sandwich flexural members (Stobie poles) with partial shear interaction: Analytical model
Publisher: Elsevier BV
Date: 10-2023
Compressive and transverse shear behaviour of novel FRP-UHPC hybrid bars
Publisher: Elsevier BV
Date: 02-2022
Properties of hybrid basalt-polypropylene fiber reinforced mortar at different temperatures
Publisher: Elsevier BV
Date: 09-2022
Bond performance of FRP bars in plain and fiber-reinforced geopolymer under pull-out loading
Publisher: Elsevier BV
Date: 10-2022
Significance Analysis of Flexural Behaviour of Hybrid Sandwich Panels
Publisher: Scientific Research Publishing, Inc.
Date: 2013
Distinct element modelling of unreinforced masonry wall under seismic loads with and without cable retrofitting
Publisher: Springer Science and Business Media LLC
Date: 10-2008
Piezoresistivity and AC Impedance Spectroscopy of Cement-Based Sensors: Basic Concepts, Interpretation, and Perspective
Publisher: MDPI AG
Date: 12-01-2023
DOI: 10.3390/MA16020768
Abstract: Cement-based sensors include conductive fillers to achieve a sensing capability based on the piezoresistivity phenomenon, in which the electrical resistivity changes with strain. The microstructural characterisation of cement-based sensors can be obtained using a promising non-destructive technique, such as AC impedance spectroscopy (ACIS), which has been recently used by many researchers. This paper reviews the fundamental concepts of piezoresistivity and ACIS in addition to the comparison of equivalent circuit models of cement-based sensors found in the literature. These concepts include piezoresistivity theory, factors affecting piezoresistivity measurement, resistance measurement methodology, strain/damage sensing, causes of piezoresistivity, theories of conduction, AC impedance spectroscopy theory, and the equivalent circuit model. This review aims to provide a comprehensive guide for researchers and practitioners interested in exploring and applying different techniques to self-sensing concrete.
Case Study of the Structural Performance of Composite Slabs with Low Strength CRC Delivered by Concrete Truck
Publisher: Elsevier BV
Date: 12-2020
Effectiveness of a novel composite jacket in repairing damaged reinforced concrete structures subject to flexural loads
Publisher: Elsevier BV
Date: 02-2020
Flexural behaviour of hybrid sandwich panel with natural fiber composites as the intermediate layer
Publisher: Universiti Malaysia Pahang Publishing
Date: 30-09-2016
Local buckling of profiled skin sheets resting on tensionless elastic foundations under in-plane shear loading
Publisher: Elsevier BV
Date: 07-2016
Use of hollow glass microspheres and hybrid fibres to improve the mechanical properties of engineered cementitious composite
Publisher: Elsevier BV
Date: 05-2018
The durability and rehabilitation technologies of concrete sewerage pipes: A state-of-the-art review
Publisher: Asian Concrete Federation
Date: 30-12-2021
DOI: 10.18702/ACF.2021.12.7.2.1
Abstract: This paper reviews the literature available on the subject of the durability of concrete sewer pipes and the corresponding rehabilitation technologies. An introduction related to the importance of the sewer system in urban life and its durability issues was first discussed as most people did not recognise the scale and complexity of the underground sewer system. Then the recent development of alternative binder materials or filler materials to improve the acid resistance of concrete was specified. For instance, the effects of alternative binders on the hydration products and the mechanism of biogenic corrosion were discussed in detail. The paper ends with the current rehabilitation technologies and the structural performance of rehabilitated sewer pipes. Also, some suggestions associated with future research were made.
Influencing Factors and New Developments of Fly Ash Based Geopolymer
Publisher: Trans Tech Publications, Ltd.
Date: 12-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.831.62
Abstract: This paper presents a discussion of factors affecting the performance of fly ash based geopolymer, and some recent innovations on fly ash based geopolymer. The characteristics of fly ash based geopolymer are discussed in terms of the effects of raw material selection, alkaline activators, and curing procedures. Nowadays, researchers have used geopolymer as a cementitious material to develop innovative geopolymer materials, such as porous, fibre reinforced and foam fly ash based geopolymer concrete, which are greener than the traditional cementitious material. The high-calcium fly ashes could be used to produce porous fly ash based geopolymer composites with satisfactory mechanical properties. The addition of fibres increases greatly the ductility of geopolymer. Foam can be added to the geopolymeric mixture to produce lightweight concrete. However, the manufacturing of fly ash-based geopolymer foam concrete has not been explored too much.
Small-Scale Pull-Out Testing on Bond Behaviour of Profiled Steel Reinforced CRC Composite Slabs
Publisher: Springer Singapore
Date: 04-09-2020
Experimental study on cyclic flexural behaviour of GFRP-reinforced seawater sea-sand concrete slabs with synthetic fibres
Publisher: Elsevier BV
Date: 04-2023
Comparative study on the behaviour of different infill materials for pre-fabricated fibre composite repair systems
Publisher: Elsevier BV
Date: 05-2018
Behavior of 3D-printed HPC plates with FRP grid reinforcement under bending
Publisher: Elsevier BV
Date: 11-2023
Flexural strength of innovative thin-walled composite cold-formed steel/PE-ECC beams
Publisher: Elsevier BV
Date: 09-2022
Numerical analysis on the seismic performance of subway station in ground crack area
Publisher: Elsevier BV
Date: 04-2023
Compressive behaviour of concrete column confined with basalt textile reinforced ECC
Publisher: Elsevier BV
Date: 09-2021
Investigation of Some Fundamental Properties of Permeable Concrete
Publisher: Trans Tech Publications, Ltd.
Date: 03-2012
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.487.869
Abstract: This paper presents the outcomes from a laboratory based research study undertaken to evaluate the fundamental properties of permeable concrete, including compressive strength, global and local strain, elastic modulus (stiffness), porosity and permeability. Six permeable concrete mixtures were made with constant water - cement ratio of 0.34, using different aggregate sizes and sand percentages. The compressive strength range was 15-35 MPa, while the permeability varied between 1.5 to 5.5mm/s and the porosity varied between 25 to 35 %. Two testing methods were used to measure the strain and modulus of elasticity (MOE) of the permeable concrete namely, platen-to-platen method and strain gauge method. Considerable difference was found between the MOEs obtained by the two methods. The MOE determined using the platen-to-platen method consistently were lower in value, which has been attributed to the softness of the capping components, the interface between the specimens and the platen and overall machine compliance. The pore characteristics and their distribution were seen to have an influence on the material responses such as material stiffness and strain. A comparison drawn between the axial strain obtained by the strain gauge measurement and that deduced from the platen-to-platen measurement was undertaken to evaluate the strain homogeneity along with possible detection of the localization phenomena.
Influence of rubber particles on the properties of foam concrete
Publisher: Elsevier BV
Date: 07-2020
Novel approach to improve crumb rubber concrete strength using thermal treatment
Publisher: Elsevier BV
Date: 12-2019
Micro-chemomechanical properties of red mud binder and its effect on concrete
Publisher: Elsevier BV
Date: 06-2023
Using textile reinforced engineered cementitious composite for concrete columns confinement
Publisher: Elsevier BV
Date: 02-2019
Finite Element Analysis of Track Structures
Publisher: Wiley
Date: 11-1993
The Effects of Soils from Different Forest Types on the Growth of the Invasive Plant Phytolacca americana
Publisher: MDPI AG
Date: 07-06-2019
DOI: 10.3390/F10060492
Abstract: Due to increasing globalization and human disturbance, plant invasion has become a worldwide concern. Soil characteristics associated with the vegetation of recipient communities affect plant invasion success to a great extent. However, the relative importance of soil biotic and abiotic factors of different recipient communities in resisting plant invasion is not fully understood. We hypothesized that natural forest soils can better resist plant invasion than can plantation soils, that the allelopathic legacy of resident trees in soil plays a role in resisting invasive plants, and that late-successional soils have a strong effect. We examined the effects of soil and litter collected from four natural forests at successional stages and one Robinia pseudoacacia Linn. plantation in eastern China on the growth of Phytolacca americana L., which is a highly invasive species across China, and explored the in idual effects of soil nutrients, allelochemicals, and soil microbes. We found that allelopathic activity of natural forest soils can effectively resist P. americana invasion, and that low level of nutrients, especially of phosphorus, in the soils might be potential limiting factors for the plant growth. The profound conditioning of soil resources by exotic R. pseudoacacia based on tree traits (including allelopathy) facilitated further P. americana invasion. Allelochemicals from forest litter inhibited the germination of P. americana seeds, but pH played a major role in P. americana growth when these substances entered the soil. However, we have no evidence that late-successional forest soils exhibit strong allelopathy toward P. americana. The present study will help to further our understanding of the mechanism of community resistance to invasion.
Fracture Toughness and Impact Resistance of Fiber-Reinforced Seawater Sea-Sand Concrete
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2022
Cost Optimum Design of Structural Fibre Composite Sandwich Panel for Flooring Applications
Publisher: Springer Berlin Heidelberg
Date: 2011
Numerical analysis of compressive behavior of pre-damaged concrete columns strengthened with textile-reinforced ECC
Publisher: Elsevier BV
Date: 07-2023
Modification of microstructure and physical properties of cement-based mortar made with limestone and alum sludge
Publisher: Elsevier BV
Date: 10-2022
Sustainable utilization of drinking water sludge
Publisher: Elsevier
Date: 2022
Innovative impact testing machine for enhancing impact related research in Australia
Publisher: SAGE Publications
Date: 03-03-2022
DOI: 10.1177/20414196211073502
Abstract: This paper summarises the development of a state-of-art impact testing machine for simulating impacts such as vehicular crashes or debris impacts onto structures. The machine has a 200 kg pneumatically powered projectile which can travel horizontally within the barrel of the machine with a maximum velocity of 50 m/s to impact the target structure. The maximum kinetic energy that can be generated by the projectile is 125 kJ by using different combinations of mass and velocity. The diameter of the projectile is 214 mm, and its impacting face can be changed to different shapes, such as flat circle, flat square or an elliptical nose to suit different impact scenarios. An innovative braking mechanism incorporating a crush tube is attached within the barrel to ensure safety when the projectile fails to be restrained by the impact. The crush tube can absorb the maximum imparted by the moving projectile. An advanced data acquisition system is installed to collect quantitative and qualitative test data during a period of 50 ms to 1 s. Two high-speed digital image correlation (DIC) cameras are attached and synchronised with the operation of the impact testing machine to record the images at the rate of 50,000 frames per second. Outputs in terms of strains, deformations, accelerations of the target structure with a record of damage history can be analysed using this 3D DIC technique. The paper also briefly presents the first application of this machine for impact testing masonry wall structures.
Axial behaviour of precast concrete panels with hollow composite reinforcing systems
Publisher: Elsevier BV
Date: 08-2021
FRP-retrofitted URM walls under in-plane shear: Review and assessment of available models
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2010
Utilization of Drinking Water Treatment Sludge as Cement Replacement to Mitigate Alkali–Silica Reaction in Cement Composites
Publisher: MDPI AG
Date: 21-11-2020
DOI: 10.3390/JCS4040171
Abstract: Alkali–silica reaction (ASR) attack is one of the most significant durability concerns in cement-based materials. In this paper, the drinking water treatment sludge (DWTS), which is a typical by-product from the drinking water treatment industry, was reused as supplementary cementitious material to mitigate the degradation of mortar resulting from ASR attack. DWTS was milled and calcined at 800 °C for 2 h before being used as a replacement for cement. Glass sand was used as the reactive fine aggregate. Properties of four mortar mixtures prepared with 0%, 5%, 10%, and 20% of calcined DWTS replacement of cement were firstly assessed, including compressive strength, flexural strength, and water sorptivity. The mortar specimens were then exposed to an ASR-attacked environment for 28 days, the changes in specimen length were monitored, and the uniformity of mortar was measured via Ultrasonic pulse velocity (UPV). The results showed that 10% replacement significantly improved the mechanical properties of mortar. The specimens with 20% of the calcined DWTS exhibited comparable strength relative to the reference group and exhibited superior resistance to ASR attack. Additionally, a water sorptivity test showed that higher contents of the calcined DWTS can lead to lower water capillary absorption of mortar.
The potential use of drinking water sludge ash as supplementary cementitious material in the manufacture of concrete blocks
Publisher: Elsevier BV
Date: 05-2021
Bond behaviour between crumb rubberized concrete and deformed steel bars
Publisher: Elsevier BV
Date: 12-2021
Connections in GFRP reinforced precast concrete frames
Publisher: Elsevier BV
Date: 11-2021
The relationship between porosity and strength for porous concrete
Publisher: Elsevier BV
Date: 11-2011
Retrofitting of damaged reinforced concrete pipe with CAC-GGBFS blended strain hardening cementitious composite (SHCC)
Publisher: Elsevier BV
Date: 07-2022
Large-rupture-strain (LRS) FRP-confined concrete in square stub columns: Effects of specimen size and assessments of existing models
Publisher: Elsevier BV
Date: 04-2022
Experimental investigation of textile reinforced engineered cementitious composite (ECC) for square concrete column confinement
Publisher: Elsevier BV
Date: 06-2018
A mathematical model for complete stress-strain curve prediction of permeable concrete
Publisher: CRC Press
Date: 26-11-2012
DOI: 10.1201/B15320-51
Properties and microstructure of concrete blocks incorporating drinking water treatment sludge exposed to early-age carbonation curing
Publisher: Elsevier BV
Date: 07-2020
Shaking table tests of RC frame structure across the earth fissure under earthquake
Publisher: Wiley
Date: 29-04-2018
DOI: 10.1002/TAL.1496
Recent advances in auxetics: Applications in cementitious composites
Publisher: SAGE Publications
Date: 18-03-2022
DOI: 10.1177/20414196211062620
Abstract: Auxetic materials, possessing negative Poisson’s ratios (NPRs), have the ability to shrink (or expand) in the lateral direction under an axial compressive (or tensile) force respectively. Due to this unique feature, an auxetic material is found to sustain high energy absorption capacity, fracture toughness and shear resistance and thus regarded as one of the future materials in the field of impact protection. However, civil engineering applications of auxetic structures or materials are minimal due to miscellaneous restrictions on NPR effects. Accumulative developments in auxetics have facilitated their applications in cementitious materials in recent years. This paper presents an overview of recent advances in the development of auxetic cementitious composites and analyses and summarises their mechanical properties under different loading conditions. Prior to extensive finite element simulations, more attention has been given to the limited experimental results. Particular attention is paid to the expansionary feasibility of the parent material to introduce auxetic behaviour, with precise identification of the limitations, innovative composition methods and facilitation of auxetic features. Finally, the paper outlines the limitations of the current research and envisages few future research opportunities in auxetic cementitious composites.
Shear behavior of FRP-UHPC tubular beams
Publisher: Elsevier BV
Date: 03-2023
Structural behaviour of composite panels made of profiled steel sheets and foam rubberised concrete under monotonic and cyclic shearing loads
Publisher: Elsevier BV
Date: 06-2020
A ternary blended binder incorporating alum sludge to efficiently resist alkali-silica reaction of recycled glass aggregates
Publisher: Elsevier BV
Date: 05-2022
Enhanced energy absorption of auxetic cementitious composites with polyurethane foam layers for building protection application
Publisher: Elsevier BV
Date: 11-2023
A multi-objective optimization approach for supply chain design of alum sludge-derived supplementary cementitious material
Publisher: Elsevier BV
Date: 12-2022
Physical and mechanical properties of expanded vermiculite (EV) embedded foam concrete subjected to elevated temperatures
Publisher: Elsevier BV
Date: 06-2022
Shaking-table tests on seismic behavior of subway station intersecting the ground fissure
Publisher: Elsevier BV
Date: 07-2022
Axial compressive behaviour of thin-walled composite columns comprise high-strength cold-formed steel and PE-ECC
Publisher: Elsevier BV
Date: 03-2023
Structural Properties of Lightweight Rubberized Concrete
Publisher: Springer Singapore
Date: 04-09-2020
Unilateral contact buckling behaviour of orthotropic plates subjected to combined in-plane shear and bending
Publisher: Elsevier BV
Date: 10-2018
Enhancing Mechanical Properties of Rubberised Concrete With Non-thermal Plasma Treatment
Publisher: Springer Singapore
Date: 04-09-2020
Mechanical performance and phase analysis of an eco-friendly alkali-activated binder made with sludge waste and blast-furnace slag
Publisher: Elsevier BV
Date: 11-2022
Compressive stress strain behavior of crumb rubber concrete (CRC) and application in reinforced CRC slab
Publisher: Elsevier BV
Date: 03-2018
Fresh and Hardened Properties of Innovative Foamed-Rubberized Concrete
Publisher: Springer Singapore
Date: 04-09-2020
Real-time humidity monitoring using distributed optical sensor for water asset condition assessment
Publisher: Springer Science and Business Media LLC
Date: 07-06-2023
DOI: 10.1007/S41101-023-00195-Y
Abstract: It is well accepted that moisture ingress in concrete reduces durability and life span of water assets. Condition assessment is an important tool to inform decision for maintenance, retrofit or replacement. However, the most significant challenge is to obtain accurate condition information, particularly when the inspection points are physically difficult to access or inaccessible. Therefore, a reliable and cost-effective monitoring (sensor) system, preferably real-time with ability to streaming online, would be a useful management tool, particularly for water utilities. This paper describes an approach to develop a distributed optical fibre humidly sensor for condition assessment and environmental monitoring both inside and outside of infrastructures, such as inside the concrete and surrounding soil. A new polyelectrolyte multilayer (PEM) coating with higher sensitive was evaluated for relative humidity measurement in soil and concrete, respectively. In this study, two simulated conditions, in concrete and soil, were conducted to evaluate the sensing concept with the development of appropriate measuring methodologies including fibre installation and protection. The optical fibre sensor setup in laboratory environment showed that optical sensor can detect and indicate voltage change with the variation of moisture contents in both soil and concrete. The test results indicate a good correlation between high levels of relative humidity/moisture and transmitted optical power. A simple relative humidity (RH) calibration can be used to convert signal to RH in percentage for soil and concrete measurements and the procedure used to imbed the fibre in both s les is effective. Nevertheless, the sensor measures soil humidity (not moisture content) therefore, further investigation is required to identify the consequence for the variation of the measured parameter.
Practical application of crumb rubber concrete in residential slabs
Publisher: Elsevier BV
Date: 02-2022
Development and behavior of novel FRP-UHPC tubular members
Publisher: Elsevier BV
Date: 09-2022
Seismic behavior of FRP-concrete-steel double skin tubular columns with a rib-stiffened Q690 steel tube and high-strength concrete
Publisher: Elsevier BV
Date: 06-2022
Optimum mix design of enhanced permeable concrete - An experimental investigation
Publisher: Elsevier BV
Date: 12-2010
Effects of carbonation on mechanical properties of CAC-GGBFS blended strain hardening cementitious composites
Publisher: Springer Science and Business Media LLC
Date: 02-2023
DOI: 10.1007/S44242-022-00001-3
Abstract: Calcium aluminate cement (CAC)—based strain hardening cementitious composites (SHCC) has been developed and used for the rehabilitation of sewerage pipelines. In addition to well-known microbiologically induced corrosion, CO 2 concentration in the sewerage environment is high, which may cause significant carbonation of pipelines. Thus, this paper aims to investigate the effects of carbonation on the mechanical performance of CAC-based SHCC. Two types of CAC-based SHCC with different strength grades and a referenced OPC-based SHCC were prepared. The accelerated carbonation test was conducted in a carbonation chamber with a 5% CO 2 concentration. The compressive and tensile behaviour of SHCC was tested first, and microstructure analysis, e.g., X-ray diffraction and scanning electron microscopy, was then performed. The results showed that CAC-based SHCC specimens exhibited robust strain-hardening performance as well as large deformation capacity in tension due to the fiber-bridging effect. Also, the compressive and tensile strength was significantly improved as well as achieving a higher tensile strain capacity after carbonation when compared with OPC-based SHCC. Microstructure analysis revealed that the metastable phases in carbonated CAC-based SHCC were converted into stable phases and calcium carbonate polymorphs, densifying the binder matrix. The obtained results of this paper may provide new insight into utilizing carbonation to avoid the unstable conversion of hydrates in calcium aluminate cement.
Optimal design for epoxy polymer concrete based on mechanical properties and durability aspects
Publisher: Elsevier BV
Date: 2020
Shaking table tests on braced reinforced concrete frame structure across the earth fissure under earthquake
Publisher: Wiley
Date: 14-10-2018
DOI: 10.1002/TAL.1559
Shear behaviour of hollow precast concrete-composite structures
Publisher: Springer Science and Business Media LLC
Date: 29-03-2021
Utilization of drinking water treatment sludge in concrete paving blocks: Microstructural analysis, durability and leaching properties
Publisher: Elsevier BV
Date: 05-2020
Cyclic Behavior of Beam–Column Pocket Connections in GFRP-Reinforced Precast Concrete Assemblages
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2023
Rubberized cement-stabilized aggregates: Mechanical performance, thermal properties, and effect on temperature fluctuation in road pavements
Publisher: Elsevier BV
Date: 05-2023
Local buckling of profiled skin sheets resting on tensionless elastic foundations under uniaxial compression
Publisher: Elsevier BV
Date: 06-2016
Strain hardening behaviour of PE fibre reinforced calcium aluminate cement (CAC) – Ground granulated blast furnace (GGBFS) blended mortar
Publisher: Elsevier BV
Date: 04-2020
Tri-axial compressive behavior of expansive concrete and steel fiber-reinforced expansive concrete
Publisher: Elsevier BV
Date: 06-2023
Review of the performance of high-strength rubberized concrete and its potential structural applications
Publisher: ASTM International
Date: 05-07-2016
DOI: 10.1520/ACEM20150026
Free vibration analysis of beams on elastic foundation
Publisher: Elsevier BV
Date: 07-1996
A molecular physiological review of vegetative desiccation tolerance in the resurrection plant Xerophyta viscosa (Baker)
Publisher: Springer Science and Business Media LLC
Date: 22-05-2015
Assessing vibration induced damage in unreinforced masonry walls subject to vehicular impact – A numerical study
Publisher: Elsevier BV
Date: 10-2021
Nonlinear dynamic analysis of unreinforced masonry
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-1998
Durability assessment of PEN/PET FRP composites based on accelerated aging in alkaline solution/seawater with different temperatures
Publisher: Elsevier BV
Date: 04-2022
Reuse of drinking water treatment sludge in mortar as substitutions of both fly ash and sand based on two treatment methods
Publisher: Elsevier BV
Date: 03-2021
Structural performance of composite panels made of profiled steel skins and foam rubberised concrete under axial compressive loads
Publisher: Elsevier BV
Date: 05-2020
Dynamic performance of rubberised concrete and its structural applications: an overview
Publisher: Elsevier BV
Date: 05-2021
Structural performance of novel thin-walled composite cold-formed steel/PE-ECC beams
Publisher: Elsevier BV
Date: 05-2021
Flexural strength of sandwich panel with lignocellulosic composites intermediate layer-a statistic approach
Publisher: SAGE Publications
Date: 12-2011
DOI: 10.1260/2041-4196.2.4.453
Abstract: In this study, three different types of lignocellulosic composite materials have been incorporated in sandwich panel structure as an intermediate layer. The experiment was statistically designed based on single factor analysis scheme. The results of experiments have been analyzed using analysis of variance (Anova) followed by Tukey's, Fisher's and Dunnet's tests to obtain the information of how significant those materials contribute to the flexural strength of sandwich panel structure. The total number of s les tested was 48 beams. The results show that the introduction of lignocellulosic composites materials, that are hardboard, medium density fibre (MDF) and plywood, has significantly improved the flexural strength of sandwich panel. The range of improvement contributed by the presence of lignocellulosic composites intermediate layer was around 100–150% for s les with balsa core and 130–150% for s les with polystyrene core. The result of this study shows the potential of lignocellulosic composite material to be developed further for producing more sustainable sandwich panel.
Punching Shear Behavior of FRP Grid-Reinforced Ultra-High Performance Concrete Slabs
Publisher: American Society of Civil Engineers (ASCE)
Date: 08-2023
Cementitious composites containing alum sludge ash: An investigation of microstructural features by an advanced nanoindentation technology
Publisher: Elsevier BV
Date: 09-2021
Microstructural behaviour and shrinkage properties of high-strength fiber-reinforced seawater sea-sand concrete
Publisher: Elsevier BV
Date: 02-2022
Modelling pervious concrete under compression loading - A discrete element approach
Publisher: Trans Tech Publications, Ltd.
Date: 12-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.168-170.1590
Abstract: With the increasing popularity of pervious concrete as a pavement material, researchers and concrete manufacturers have paid more attention to research needs. Pervious concrete is currently used in low traffic volume areas such as parking lots, footpaths and driveways. This is because it generally has lower strength than conventional concrete. This paper aims at developing a computational model to simulate the behaviour of pervious concrete under compression. Since compressive strength is one of the most important properties for concrete, a virtual model will provide a better understanding of its mechanical performance, which in turn will improve both the mix design and the material strength in the future. The discrete element method was applied and the results of calculations based on particle flow analysis are compared to the experimental data.
Cyclic Performance of Steel–Concrete–Steel Sandwich Beams with Rubcrete and LECA Concrete Core
Publisher: MDPI AG
Date: 07-01-2019
DOI: 10.3390/JCS3010005
Abstract: Due to the structural and economic features of steel–concrete–steel (SCS) structural systems compared with conventional reinforced concrete ones, they are now used for a range of structural applications. Rubcrete, in which crumbed rubber from scrap tires partially replaces mineral aggregates in concrete, can be used instead of conventional concrete. Utilizing rubber waste in concrete potentially results in a more ductile lightweight concrete that can introduce additional features to the SCS structural members. This study aimed to explore different concrete core materials in SCS beams and the appropriate shear connectors required. In this study, four SCS sandwich beams were tested experimentally under incrementally increasing flexure cyclic loading. Each beam had a length of 1000 mm, and upper and lower steel plates with 3 mm thickness sandwiched the concrete core, which had a cross-section of 150 mm × 150 mm. Two of the beams were constructed out of Rubcrete core with welded and bolted shear connectors, while the other two beams were constructed with welded shear connectors and either conventional concrete or lightweight expanded clay aggregate (LECA) concrete cores. The performance of the SCS sandwich beams including damage pattern, failure mode, load-displacement response, and energy dissipation behavior was compared. The results showed that, while Rubcrete was able to provide similar concrete cracking behavior and strength to that of conventional concrete, LECA concrete degraded the strength properties of SCS. Using bolted shear connectors instead of welded ones caused a high number of cracks that resulted in a reduced ductility and deflection capacity of the beam before failure. The rubberized concrete specimen presented an improved ductility and deflection capacity compared with its conventional concrete counterpart.
Mix Design and Mechanical Properties of Rubberized Cement Stabilized Soil (RCSS) Pavers
Publisher: Springer Singapore
Date: 04-09-2020
Microstructural and mechanical properties of fiber-reinforced seawater sea-sand concrete under elevated temperatures
Publisher: Elsevier BV
Date: 06-2022
Experimental study on crumb rubberised concrete (CRC) and reinforced CRC slabs under static and impact loads
Publisher: Informa UK Limited
Date: 25-08-2020
Flexural behavior of FRP grid reinforced ultra-high-performance concrete composite plates with different types of fibers
Publisher: Elsevier BV
Date: 12-2022
Modelling of steel lattice tower angle legs reinforced for increased load capacity
Publisher: Elsevier BV
Date: 10-2012
Impact Resistance and Sodium Sulphate Attack Testing of Concrete Incorporating Mixed Types of Recycled Plastic Waste
Publisher: MDPI AG
Date: 24-08-2021
DOI: 10.3390/SU13179521
Abstract: Impact resistance, water transport properties and sodium sulphate attack are important criteria to determine the performance of concrete incorporating mixed types of recycled plastic waste. Nine mixes were designed with different combinations of the three plastic types Polyethylene terephthalate (PET), High density polyethylene (HDPE) and Polypropylene (PP). The plastic partially substituted the coarse aggregate (by volume) at various replacement ratios 10%, 15%, 20% and 30%. The impact resistance and water transport properties were evaluated for nine mixes while sodium sulphate attack test was performed for three mixes. The results showed that the addition of mixed recycled plastic in concrete improved the impact resistance. The highest impact resistance improvement was achieved by R8 (PET + HDPE + PP) at 30% replacement which was 4.5 times better than the control mix. Water absorption results indicated a slight increase in all plastic mixes while contradictory results were observed for sorptivity test. Analysis of sodium sulphate attack results showed that incorporating 30% mixed plastic reduced the sodium sulphate resistance slightly due to the collective effect of plastic entrapping of sulphate ions after 80 cycles. This study has shown some positive results relating to the impact performance of Mixed Recycled Plastic Concrete (MRPC) which enhances its use in a sustainable way.
Behavior of Damaged Concrete Columns Repaired with Novel FRP Jacket
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2019
Influence of Mixing Procedures, Rubber Treatment, and Fibre Additives on Rubcrete Performance
Publisher: MDPI AG
Date: 10-04-2019
DOI: 10.3390/JCS3020041
Abstract: This research extensively investigates how to enhance the mechanical performance of Rubcrete, aiming to move this type of concrete from the laboratory research level to a more practical use by the concrete industry. The effects of many different mixing procedures, chemical pre-treatments on the rubber particles, and the use of fibre additives, have been investigated for their impact upon Rubcrete workability, compressive strength, tensile strength, and flexural strength. The mixing procedure variables included mixing time and mixing order. The rubber pre-treatments utilized chemicals such as Sodium Hydroxide (NaOH), Hydrogen Peroxide (H2O2), Sulphuric acid (H2SO4), Calcium Chloride (CaCl2), Potassium Permanganate (KMnO4), Sodium Bisulphite (NaHsO3), and Silane Coupling Agent. Soaking rubber particles in tap water, or running them through water before mixing, were also tried as a pre-treatment of rubber particles. In addition, the effects of fibre additives such as steel fibres, polypropylene fibres, and rubber fibres, were assessed. X-ray photoelectron spectroscopy (XPS) analysis was utilised to examine some of the pre-treated rubber particles. The results showed that doubling the net mixing time of all mix constituents together enhanced the Rubcrete slump by an average of 22%, and the compressive strength by up to 8%. Mixing rubber with dry cement before adding to the mix increased the compressive strength by up to 3%. Pre-treatment using water was more effective than other chemicals in enhancing the Rubcrete workability. Regardless of the treatment material type, the longer the time of the treatment, the more cleaning of rubber occurred. Significant Rubcrete flexural strength increase occurred when using 1.5% fibre content of both steel fibre and polypropylene fibre.
Axisymmetric free vibration analysis of conial shells
Publisher: Elsevier BV
Date: 03-1993
A Review of Skin Buckling Theory in Composite Members
Publisher: Trans Tech Publications, Ltd.
Date: 07-2016
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.846.312
Abstract: This paper provides a comprehensive review of various methods used for skin buckling analysis in composite components. The skin buckling phenomenon is one of the governing criteria in composite design. It is a kind of contact buckling in which partial sections of skin buckle away from the filler material. In general, the problem can be modelled as a thin plate (skin) in unilateral contact with elastic medium (filler material). The theoretical analysis of contact buckling is complicated due to the nonlinearity arising from changing contact regions. To simplify the calculations, the filler material was usually modelled as a tensionless elastic foundation. The skin buckling coefficient varies in terms of the relative foundation stiffness factors. Because the Eigen-value method is not applicable to nonlinear systems, the finite element (FE) method was usually employed for post-buckling analysis, while initial buckling performance was investigated through analytical or semi-analytical methods such as rigid foundation model, infinite plate model and finite plate model. The compressive buckling and shear buckling problems for thin plates resting on tensionless foundations have been solved successfully. However, there are still urgent needs for future research on the topic. For ex le, the load carrying capacity of the buckling plates needs to be formulated for practical application. Complicated problems with complex loadings and/or corrugated skins need further investigation as well.
Geometry and restraint effects on the bending behaviour of the glass fibre reinforced polymer sandwich slabs under point load
Publisher: Elsevier BV
Date: 03-2013
A Markov Chain Monte Carlo Technique Based Optimal Mix Design of Porous Concrete
Publisher: Trans Tech Publications, Ltd.
Date: 08-2013
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.357-360.959
Abstract: Porous concrete is one of the innovative and promising concrete products, which is featured with a relatively high water permeability rate. Compared with conventional concrete products, due to the lack of fine aggregates in the mix design of porous concrete, the void spaces between the coarse aggregates remains unfilled and causes a large amount of porosity in the hardened concrete mass. On the other hand, the strength of porous concrete is usually lower than that of the conventional concrete products due to the lack of fine aggregates. For the purpose of achieving a relatively high strength of porous concrete while maintaining a good permeability of pavements, the mix design of porous concrete is modeled as a Markov Chain Monte Carlo (MCMC) system and a Gibbs S ling method based approach is developed to approximate the optimal mix design. The simulation results show that, by using the proposed approach, the system converges to the optimal solution quickly and the derived optimal mix design achieves the tradeoff between the compressive strength and the permeability rate.
Assessment of debonding failure models for FRP retrofitted URM structures
Publisher: CRC Press
Date: 18-11-2010
DOI: 10.1201/B10571-97
Investigation of the effect of aggregate on the performance of permeable concrete
Publisher: CRC Press
Date: 29-10-2009
Filling natural microtubules with triphenyl phosphate for flame-retarding polymer composites
Publisher: Elsevier BV
Date: 12-2018
Behavior of GFRP-RC columns under axial compression: Assessment of existing models and a new axial load-strain model
Publisher: Elsevier BV
Date: 04-2022
Performance of crumb rubber concrete composite-deck slabs in 4-point-bending
Publisher: Elsevier BV
Date: 08-2021
Local buckling of thin plate on tensionless elastic foundations under interactive uniaxial compression and shear
Publisher: Elsevier BV
Date: 03-2018
ECCs/UHPFRCCs with and without FRP reinforcement for structural strengthening/repairing: A state-of-the-art review
Publisher: Elsevier BV
Date: 2022
Properties of mortar incorporating untreated and treated drinking water treatment sludge
Publisher: Elsevier BV
Date: 04-2021
Experimental study on the structural performance of full-scale tyre wall for residential housing applications
Publisher: Elsevier BV
Date: 05-2022
Experimental study on spatial prefabricated self-centering steel frame with beam-column connections containing bolted web friction devices
Publisher: Elsevier BV
Date: 09-2019
Cross-laminated timber–concrete composite structural floor system: A state-of-the-art review
Publisher: Elsevier BV
Date: 12-2021
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