Jay Sanjayan
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View article: Mechanical and Fatigue Performance of Recycled Concrete Aggregate Blended with Waste Tyre Rubber Stabilised with Slag for Pavement Application
Mechanical and Fatigue Performance of Recycled Concrete Aggregate Blended with Waste Tyre Rubber Stabilised with Slag for Pavement Application Open
Waste tyre rubber (TR) from end-of-life tyres poses a major environmental challenge. Therefore, recycling this waste into useful applications contributes to sustainable waste management strategies and supports a circular economy. Rubber po…
View article: Active Control of Properties of Fresh and Hardening Concrete
Active Control of Properties of Fresh and Hardening Concrete Open
Concrete mixtures have an optimized mix design in view of attaining desired properties. However, after mixing, during further processing, it is typically not possible to further adjust the performance of the fresh and hardening concrete. A…
View article: Thermal performance and life cycle analysis of 3D printed concrete wall building
Thermal performance and life cycle analysis of 3D printed concrete wall building Open
Automated construction process with extrusion-based 3D concrete printing (3DCP) is widely recognised due to its ability to construct complex freeform geometrical shapes. Furthermore, the automation process reduces labour and minimises mate…
View article: Pumping-less 3D concrete printing using quick nozzle mixing
Pumping-less 3D concrete printing using quick nozzle mixing Open
Nozzle technologies for 3D concrete printing have been evolving to balance the conflicting demands of buildability and pumpability. This study introduces a simplified approach that eliminates the need for pumping by developing a customized…
View article: Impact response of textile-reinforced 3D printed concrete panels
Impact response of textile-reinforced 3D printed concrete panels Open
This study assessed the impact response of 3D-printed textile-reinforced concrete for structural applications of 3D concrete printed structures, where impact is a significant load case. To study the impact response, two layers of AR-glass …
View article: Encapsulation of sodium silicate to attain on demand buildability enhancement in concrete 3D printing
Encapsulation of sodium silicate to attain on demand buildability enhancement in concrete 3D printing Open
This study investigates the encapsulation of buildability enhancing additive (i.e., sodium silicate) using a phase change material (PCM) as a thermo-responsive additive for concrete 3D printing. The encapsulated additive is mixed with prin…
View article: In-process textile reinforcement method for 3D concrete printing and its structural performance
In-process textile reinforcement method for 3D concrete printing and its structural performance Open
3D concrete printing (3DCP) is an innovative technology for constructing complex freeform structures that are difficult or expensive to build using conventional construction methods. The printing of double-curved shells and aesthetically p…
View article: Printhead mixing of geopolymer and OPC slurries for hybrid alkali-activated cement in 3D concrete printing
Printhead mixing of geopolymer and OPC slurries for hybrid alkali-activated cement in 3D concrete printing Open
Hybrid alkali cement (HAC) is regarded as a sustainable alternative to cementitious materials due to the use of more than 70 % of supplementary cementitious materials while the issues associated with geopolymers are avoided to a great exte…
View article: Bond-slip behaviour of textile-reinforcement in 3D printed concrete
Bond-slip behaviour of textile-reinforcement in 3D printed concrete Open
Integration of reinforcement in extrusion-based 3D concrete printing (3DCP) is one of the significant challenges that limit its structural application. Providing textile reinforcement having high tensile strength, easy formability and non-…
View article: Investigation of shrinkage and compressive strength developments of concretes made with type GB cements
Investigation of shrinkage and compressive strength developments of concretes made with type GB cements Open
This paper presents the results of an ASA sponsored experimental program conducted at Monash University to study the shrinkages of concrete containing blended cements (Type GB) and their compressive strength developments. The mixtures were…
View article: Influence of cooling methods on the mechanical properties of OPC and OPC/slag concretes after exposure to elevated temperatures
Influence of cooling methods on the mechanical properties of OPC and OPC/slag concretes after exposure to elevated temperatures Open
The present work investigates the residual mechanical properties of OPC and OPC/slag concretes, exposed to either 400 or 800ºC followed by furnace or water cooling. The heat transfer from surface to centre of the specimens maintained simil…
View article: Creep of geopolymer and Portland cement pastes due to high temperature exposure
Creep of geopolymer and Portland cement pastes due to high temperature exposure Open
Geopolymer is a new class of binder based on aluminosilicates and purported to be an environmentally friendly alternative to ordinary Portland cement (OPC) based binder, and can potentially replace OPC in concrete making. Chemical structur…
View article: Development of lightweight alkali-activated composites incorporating cenopsheres: Exhibiting high strength/density ratio and low thermal conductivity
Development of lightweight alkali-activated composites incorporating cenopsheres: Exhibiting high strength/density ratio and low thermal conductivity Open
In the current work, the mechanical and thermal characteristics of environmentally friendly lightweight composites with high specific strength (defined as the ratio of strength to density) and low thermal conductivity are examined. To incr…
View article: Investigating PCM encapsulated NaOH additive for set-on-demand in 3D concrete printing
Investigating PCM encapsulated NaOH additive for set-on-demand in 3D concrete printing Open
This study investigates the print head activation of an encapsulated additive to attain on-demand setting in 3D concrete printing for buildability enhancement. Sodium hydroxide (NaOH) is considered as a set accelerating additive, and it is…
View article: Study of Technological Advancement and Challenges of Façade System for Sustainable Building: Current Design Practice
Study of Technological Advancement and Challenges of Façade System for Sustainable Building: Current Design Practice Open
Currently, several façade systems exist to enable sustainable building design. The biggest challenges for façade designers are to identify new technology and effective, sustainable systems that enable high structural and sustainable perfor…
View article: Rapid early age strength development of in-line activated geopolymer for concrete 3D printing
Rapid early age strength development of in-line activated geopolymer for concrete 3D printing Open
The in-line activation using print head mixing technology involves two parts pumping and mixing at the print head. This technology can be applied in geopolymer concrete, where the base mix (precursors, sand and water) and alkaline activato…
View article: Pore structure profile of ambient temperature-cured geopolymer concrete and its effect on engineering properties
Pore structure profile of ambient temperature-cured geopolymer concrete and its effect on engineering properties Open
Ambient temperature-cured geopolymer concrete (GPC) with solid alkali activators are attracting attention as an eco-friendly alternative to OPC-based concrete (OPCC) for industrial applications. This research investigates the pore structur…
View article: Shrinkage model for waste clay brick-based geopolymer concrete
Shrinkage model for waste clay brick-based geopolymer concrete Open
This study investigated the shrinkage behaviour of geopolymer concrete (GPC) under various curing environments. One-part GPC was prepared by using waste clay bricks (WCB), fly ash and slag as precursors and anhydrous sodium silicate as the…
View article: Development of sustainable heat resistive and storage panels for building envelope: An experimental and numerical study
Development of sustainable heat resistive and storage panels for building envelope: An experimental and numerical study Open
Lightweight concretes (LWC) exhibit low thermal mass which results in increased summertime overheating and cooling demand. Form-stable phase change materials (FSPCM) with aerogel as a filler material were integrated into LWC in previous st…
View article: Robust trajectory tracking control for cable-driven parallel robots with model uncertainty
Robust trajectory tracking control for cable-driven parallel robots with model uncertainty Open
This paper is concerned with robust trajectory tracking control for cable-driven parallel robots (CDPRs) with uncertain dynamics. A new accurate trajectory tracking controller (ATTC) is proposed such that the pose of the mobile platform of…