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High quality recycled aggregate concrete (HIRAC) processed by decompression and rapid release



Title: High quality recycled aggregate concrete (HIRAC) processed by decompression and rapid release
Author(s): Y. Kimura
Paper category : conference
Book title: RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development
Editor(s): N. Kashino and Y. Ohama
Print-ISBN: 2-912143-55-1
e-ISBN: 2912143640
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 163 - 170
Total Pages: 8
Nb references: 3
Language: English


Abstract: Quality of concrete with recycled aggregate is generally lower than that of virgin aggregate. The main reason is that recycled aggregate with its higher water absorption property has porous mortar matrix around the virgin aggregate and hence develops an inferior bond. In order to improve the quality of recycled aggregate concrete, an innovative method is proposed in this paper.
High quality recycled aggregate concrete (HiRAC) can be obtained through a decompression and rapid release (DC-RR) procedure applied after normal mixing of concrete with recycled aggregate. Through this procedure, the quality of transition zone between aggregate and cement matrix can be dramatically improved. This paper describes an experimental study on the effectiveness of DC-RR procedure on some of the mechanical and physical properties of recycled coarse aggregate concrete.


Online publication: 2004-11-24
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143640.019