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.
Original language | English |
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Title of host publication | Nanotechnology in Construction for Circular Economy - Proceedings of NICOM7 |
Editors | Wenhui Duan, Lihai Zhang, Surendra P. Shah |
Publisher | Springer |
Pages | 313-320 |
Number of pages | 8 |
ISBN (Print) | 9789819933297 |
DOIs | |
Publication status | Published - 2023 |
Externally published | Yes |
Event | Nanotechnology in Construction for Circular Economy 2022 - Melbourne, Australia Duration: 31 Oct 2022 → 2 Nov 2022 https://link.springer.com/book/10.1007/978-981-99-3330-3 (Proceedings) |
Publication series
Name | Lecture Notes in Civil Engineering |
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Volume | 356 LNCE |
ISSN (Print) | 2366-2557 |
ISSN (Electronic) | 2366-2565 |
Conference
Conference | Nanotechnology in Construction for Circular Economy 2022 |
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Abbreviated title | NICOM 2022 |
Country/Territory | Australia |
City | Melbourne |
Period | 31/10/22 → 2/11/22 |
Internet address |
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Keywords
- Cement
- Compressive strength
- Fly ash
- Nanosilica
- Set accelerator