Prediction of Time-dependent Deformations in Post-tensioned Concrete Suspended Slabs in Tall Buildings. The proposed project aims to develop an analytical model that can predict the time-dependent deformations in post-tensioned concrete slabs considering concrete shrinkage and creep, cracking, and bond-slip behaviour. Over the past several years, numerous cases have been reported in Australia and elsewhere, of flexural elements for which the calculated deflection is far less than the actual defl ....Prediction of Time-dependent Deformations in Post-tensioned Concrete Suspended Slabs in Tall Buildings. The proposed project aims to develop an analytical model that can predict the time-dependent deformations in post-tensioned concrete slabs considering concrete shrinkage and creep, cracking, and bond-slip behaviour. Over the past several years, numerous cases have been reported in Australia and elsewhere, of flexural elements for which the calculated deflection is far less than the actual deflection leading to serviceability problems. The significance of this investigation hence lies in its potential to provide a solution to more accurately predict service-life deflections in post-tensioned concrete suspended slabs and validate the model with real-life deflections monitored over time on a current building project.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE160101606
Funder
Australian Research Council
Funding Amount
$390,000.00
Summary
3D printing of concrete structures reinforced using multiscale fibers. The project aims to develop high performance concrete structures using 3D printing techniques. 3D printing of concrete is receiving increasing attention because of its potential use for direct construction of buildings and other complex infrastructures of considerable dimensions and of virtually any shape. This project aims to develop high-performance concrete structures reinforced by multiscale (nano- and micro-fibre) filler ....3D printing of concrete structures reinforced using multiscale fibers. The project aims to develop high performance concrete structures using 3D printing techniques. 3D printing of concrete is receiving increasing attention because of its potential use for direct construction of buildings and other complex infrastructures of considerable dimensions and of virtually any shape. This project aims to develop high-performance concrete structures reinforced by multiscale (nano- and micro-fibre) fillers using 3D printing. The project plans to introduce a micro-fibre 3D mesh into the concrete with a ‘knitting’ technique. The outcome of the project may lead to a 60 per cent reduction in current manufacturing cost and reduction of the lead-time for concrete infrastructures.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE170100604
Funder
Australian Research Council
Funding Amount
$360,000.00
Summary
Foam concrete using three-dimensional printing and nano-engineering. This project aims to design foam concrete. Foam concrete, made of air-voids and thin concrete films, has good thermal insulation/fire resistance and energy adsorption capacity but is weak. This project will develop a foam concrete via 3D printing to control air-void structures to achieve high strength and ductility and nano-engineering to improve the performance and durability of thin concrete films. It is expected that this hi ....Foam concrete using three-dimensional printing and nano-engineering. This project aims to design foam concrete. Foam concrete, made of air-voids and thin concrete films, has good thermal insulation/fire resistance and energy adsorption capacity but is weak. This project will develop a foam concrete via 3D printing to control air-void structures to achieve high strength and ductility and nano-engineering to improve the performance and durability of thin concrete films. It is expected that this high-performance foam concrete can be used as a load-bearing structural element to reduce construction costs. The project should discover chemical and physical mechanisms governing the resilience and sustainability of newly developed foam concrete.Read moreRead less
Self-Healing Concrete for Mitigation of Chloride Induced Steel Corrosion. This project aims to develop an intrinsic self-healing concrete using crystalline admixtures for rapid healing of concrete cracking. In marine environments, concrete cracking provides a direct access for chlorides from sea water to the steel reinforcement, leading to early and severe steel corrosion. The self-healing concrete will be designed to address the two main causes of concrete structures deterioration in Australia: ....Self-Healing Concrete for Mitigation of Chloride Induced Steel Corrosion. This project aims to develop an intrinsic self-healing concrete using crystalline admixtures for rapid healing of concrete cracking. In marine environments, concrete cracking provides a direct access for chlorides from sea water to the steel reinforcement, leading to early and severe steel corrosion. The self-healing concrete will be designed to address the two main causes of concrete structures deterioration in Australia: early age cracking due to restrained shrinkage and chloride induced steel reinforcement corrosion. The outcomes of this project will drive the advances in developing and applying crystalline admixture-based self-healing concrete to extend the service life of concrete structures and avoid costly repair.Read moreRead less
Development of three-dimensional printing conductive concrete for electromagnetic pulse shielding. This project aims to develop innovative methods for the use of conductive concrete as a building material with an electromagnetic pulse (EMP) shielding property. Three dimensional printing of conductive concrete will present an innovative and promising technique in real-life construction practices when structures are needed for facilities and infrastructure employed for critical services such as mi ....Development of three-dimensional printing conductive concrete for electromagnetic pulse shielding. This project aims to develop innovative methods for the use of conductive concrete as a building material with an electromagnetic pulse (EMP) shielding property. Three dimensional printing of conductive concrete will present an innovative and promising technique in real-life construction practices when structures are needed for facilities and infrastructure employed for critical services such as military or financial infrastructures. The project will create new revenue streams for cement and concrete industry as well as empower the workforce with cutting-edge skills. The newly developed materials and technology will lead to protection of national facilities and infrastructure.Read moreRead less
Multi-functional nano-modified cementitious materials for well cementing. By incorporating different nano-materials in well cements, this project aims to develop multi-functional cementitious materials with self-sensing properties and greater strength and durability under extreme conditions including high/low temperatures, high pressure and corrosive environments. The integrity and longevity of well cement are paramount for the safe, efficient, environmentally sustainable production of oil and n ....Multi-functional nano-modified cementitious materials for well cementing. By incorporating different nano-materials in well cements, this project aims to develop multi-functional cementitious materials with self-sensing properties and greater strength and durability under extreme conditions including high/low temperatures, high pressure and corrosive environments. The integrity and longevity of well cement are paramount for the safe, efficient, environmentally sustainable production of oil and natural gas resources. Cementing problems are the main factor contributing to incidents during drilling and completion of wells, necessitating costly remediation. It is expected that the novel cement developed in the project will produce safer wells with fewer (gas) environmental emission risks.Read moreRead less
Controlling alkali-silica reaction in concrete for road pavements and bridge using graphene oxide and dune sand. This project aims to formulate a new mix design for sustainable and resilient infrastructure materials with radically improved material properties and performance, as well as reduced life cycle cost and impact on the environment and societies. The aim of the project is to investigate the effect of dune sand and graphene oxide on mechanical properties and durability of concrete composi ....Controlling alkali-silica reaction in concrete for road pavements and bridge using graphene oxide and dune sand. This project aims to formulate a new mix design for sustainable and resilient infrastructure materials with radically improved material properties and performance, as well as reduced life cycle cost and impact on the environment and societies. The aim of the project is to investigate the effect of dune sand and graphene oxide on mechanical properties and durability of concrete composites including properties and strength relation and alkali-silica reaction in concrete. The optimal mix design will be supported by the understanding of the interaction between graphene oxide, water molecules, dune sand and cement at nanolevel via scanning electron microscopy (SEM) and molecular dynamics simulations.Read moreRead less
Development of nano reinforced concrete using boron nitride nanosheets. This project seeks to develop high-performance concrete materials by exploiting emerging nanotechnology. It plans to adopt emerging nanotechnology involving hexagonal boron nitride nanosheets and advanced micro-computer tomography instrumentation to transform conventional concrete into one that is stronger and more durable in extreme environmental conditions. It also plans to use sophisticated modelling techniques including ....Development of nano reinforced concrete using boron nitride nanosheets. This project seeks to develop high-performance concrete materials by exploiting emerging nanotechnology. It plans to adopt emerging nanotechnology involving hexagonal boron nitride nanosheets and advanced micro-computer tomography instrumentation to transform conventional concrete into one that is stronger and more durable in extreme environmental conditions. It also plans to use sophisticated modelling techniques including molecular dynamics simulations as well as microplane models to analyse the effect of nanofillers. The findings may drive advances in cement hydration, nanotechnology, concrete technology and blast, impact and fire engineering.Read moreRead less
De-consolidation and Re-consolidation of Advanced Thermoplastic Matrix Composites. The project provides a comprehensive physical understanding on thermal de-consolidation and re-consolidation processes in advanced thermoplastic composites during re-heating/cooling processes, such as thermoforming and joining. Mechanistic models based on theoretical analysis, experimental studies and computational modelling will be established to provide a unified approach to predict de-consolidation and re-conso ....De-consolidation and Re-consolidation of Advanced Thermoplastic Matrix Composites. The project provides a comprehensive physical understanding on thermal de-consolidation and re-consolidation processes in advanced thermoplastic composites during re-heating/cooling processes, such as thermoforming and joining. Mechanistic models based on theoretical analysis, experimental studies and computational modelling will be established to provide a unified approach to predict de-consolidation and re-consolidation processes. Optimum processing-windows will be established, with which the undesired deterioration in material meso-structures and mechanical performance due to de-consolidation is effectively minimised. The outcomes of the project will fill the gap in the knowledge for thermoplastic composite processing and will improve the integrity of thermoplastic composite structures in practical applications.Read moreRead less
A Unified Approach to Determine Permeabilities of Fibre Preforms for Manufacturing Advanced Composite Structures. A unified framework is developed first time to determine 3-D permeabilities of fibre preforms for advanced fibre composites using homogenisation theories based on micro-, meso- and macro-structures of fibre preforms. Mechanistic models based on experimental studies, theoretical analyses and computational modelling are established to quantify permeabilities in different scales. It off ....A Unified Approach to Determine Permeabilities of Fibre Preforms for Manufacturing Advanced Composite Structures. A unified framework is developed first time to determine 3-D permeabilities of fibre preforms for advanced fibre composites using homogenisation theories based on micro-, meso- and macro-structures of fibre preforms. Mechanistic models based on experimental studies, theoretical analyses and computational modelling are established to quantify permeabilities in different scales. It offers a unique technique to determine 3-D permeabilities for manufacturing advanced composite structures using various novel technologies based on resin impregnation or infusion, such as VARTM and RI. The outcomes of the project will fill the gap in the essential knowledge for cost-effective manufacturing of advanced composite structures in practical applications.Read moreRead less