Abstract
Concrete waste is incorporated as one of the highest proportions of the total construction and demolition materials, i.e. about 80% in Australia. Most of the concrete waste generated is sent to landfills. Part of the concrete waste is used as recycled aggregate for recycled aggregate concrete; however, the use of recycled aggregate concrete is only limitedly used as sub-grade and pavement applications. Structural or high-grade concrete applications from recycled aggregate are rarely used. One of the main reasons is the low quality of recycled aggregate with low density, high water absorption rate and low strength. This paper reviews the existing concrete waste recycling technologies for improving recycled aggregate quality and thus for the use of recycled aggregate concrete as high-grade applications, which include: i) heating and grinding method; ii) screw grinding method; iii) mechanical grinding method; and iv) gravity concentration method. The mechanisms of the methods are also discussed.
| Original language | English |
|---|---|
| Title of host publication | Concrete Materials |
| Subtitle of host publication | Properties, Performance and Applications |
| Publisher | Nova Science Publishers, Inc. |
| Pages | 567-573 |
| Number of pages | 7 |
| ISBN (Electronic) | 9781617287718 |
| ISBN (Print) | 9781607412502 |
| Publication status | Published - 1 Jan 2009 |
Bibliographical note
Publisher Copyright:© 2009 Nova Science Publishers, Inc.
