ORCID Profile
0000-0002-1537-684X
Current Organisation
RMIT University
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Publisher: Unpublished
Date: 2013
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 03-2016
Publisher: Springer Nature Singapore
Date: 2023
DOI: 10.1007/978-981-99-3330-3_32
Abstract: The cement industry is responsible for about 5–7% of global greenhouse gas emissions and with the rapid rise in global warming, it is imperative to produce an ecofriendly alternative to Portland cement. Fly ash (FA) is an abundantly available and least utilized industrial byproduct with good pozzolanic properties that can help reduce the carbon footprint of cement composites. We investigated replacing 80% of the cement content with different blends of FA, nanosilica (NS) and silica fume (SF). Hydrated lime and a set accelerator were used to increase the pozzolanic reactivity of the blended cement composites. The portlandite released with 20% cement content was insufficient for the pozzolanic reaction of the blended cement composites containing FA and SF, requiring externally added hydrated lime. The addition of a set accelerator significantly increased the pozzolanic reaction and the resultant compressive strength, and these increased with the increasing content of the set accelerator. The replacement of SF with NS led to a remarkable increase in the pozzolanic reaction. The corresponding compressive strength of FA mixed with cement composites increased with increasing percentage composition of NS.
Publisher: Elsevier BV
Date: 12-2023
Publisher: Elsevier BV
Date: 11-2022
Publisher: Elsevier BV
Date: 08-2023
Publisher: Springer Nature Singapore
Date: 2023
DOI: 10.1007/978-981-99-3330-3_17
Abstract: Lightweight concrete (LWC) has been used for more than 2000 years, and the technical development of waste-based LWC is still proceeding. Notably, the very first representative concrete mix of infrastructural LWC was introduced for building a family house in Berlin, Germany, a few decades ago. The unique and distinctive combination of waste-based LWC successfully creates an appealing alternative to traditional concrete aggregates in terms of durability, robustness, cost, energy-saving, transportation, environmental advantages, innovative architectural designs and implementations, and ease of construction. Numerous researchers have attempted to utilize waste materials to produce LWC, aiming to bring both ecological and economical solutions to the construction industry over the past few decades. Waste materials, such as crushed glass, waste tire rubber, masonry rubber, chip rubber, plastics, coconut shells, palm oil fuel ash, palm kernel shells, fly ash, and rice husks, possess lower specific gravity than traditional concrete aggregates. Thus waste-based LWC can be a significant replacement for conventional raw materials (cementitious material and aggregates) as it requires less strength than conventional concrete for both structural and non-structural applications. Although waste-based LWC is well recognized and has proven its scientific potential in a broad range of applications, there are still uncertainties and hesitations in practice. Therefore, the primary objective of this study was to demonstrate the current state-of-the-art understanding and advancement of waste-based LWC over the past decades. Furthermore, an equally critical discussion is reported to shed light on the potential benefits of LWC. We highlight how the performance of LWC has been enhanced significantly over the period, and understanding of the properties of waste-based LWC has advanced.
Publisher: Elsevier BV
Date: 10-2021
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 03-2023
Publisher: Elsevier BV
Date: 09-2022
Start Date: 2017
End Date: 2017
Funder: University of Technology Sydney
View Funded ActivityStart Date: 2015
End Date: 2016
Funder: University of Malaya
View Funded ActivityStart Date: 2017
End Date: 2019
Funder: University of Adelaide
View Funded ActivityStart Date: 2006
End Date: 2008
Funder: Ministry of Education, Government of the People's Republic of Bangladesh
View Funded ActivityStart Date: 2015
End Date: 2015
Funder: Universiti Malaya
View Funded Activity