Abstract
The process of carbon-conditioning refers to the pressurised exposure of recycled aggregate to carbon dioxide (CO2) for a certain period of time before concrete mixing. The entraining of CO2 assists to facilitate the negative properties of recycled aggregate that produces a deprived final recycled concrete as well as providing a superior calcium carbonate chemical reaction. Carbon-conditioning reduces porosity and water absorbency of recycled aggregate. In addition to improve recycled aggregate quality, CO2 emissions from the aggregate also help filling openings in the concrete composition, generating an improved bond matrix from the formation of calcium carbonates (Zhan et al. 2014). These two traits assist in enhancing the recycled concrete properties. This paper demonstrates a great potential in the use of RACO2 and provides insight for effective use of recycled aggregate for concrete production. The effective use of recycled aggregate can reduce the amount of landfill that is utilised for construction and demolition waste.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 22nd International Conference on Advancement of Construction Management and Real Estate (CRIOCM 2017), 20-23 November 2017, Swinburne University of Technology, Hawthorn, Victoria |
| Publisher | CRIOCM 2017 Organising Committee |
| Pages | 118-121 |
| Number of pages | 4 |
| ISBN (Print) | 9780648074243 |
| Publication status | Published - 2017 |
| Event | International Conference on Advancement of Construction Management and Real Estate - Duration: 20 Nov 2017 → … |
Conference
| Conference | International Conference on Advancement of Construction Management and Real Estate |
|---|---|
| Period | 20/11/17 → … |
Keywords
- aggregates (building materials)
- recycling
- concrete
- carbon dioxide
- calcium carbonate
- construction and demolition debris