Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43427
Title: Assessment of mechanical properties of concrete incorporating carbonated recycled concrete aggregates
Authors: Xuan, D
Zhan, B
Poon, CS 
Keywords: Carbonation
Mechanical properties
Recycled aggregate concrete
Recycled concrete aggregates
Issue Date: 2016
Publisher: Pergamon Press
Source: Cement and concrete composites, 2016, v. 65, p. 67-74 How to cite?
Journal: Cement and concrete composites 
Abstract: An accelerated carbonation technique was employed to strengthen the quality of recycled concrete aggregates (RCAs) in this study. The properties of the carbonated RCAs and their influence on the mechanical properties of new concrete were then evaluated. Two types of RCAs, an old type of RCAs sourced from demolished old buildings and a new type of RCAs derived from a designed concrete mixture, were used. The chosen RCAs were firstly carbonated for 24 h in a carbonation chamber with a 100% CO2 concentration at a pressure level of 0.1 Bar and 5.0 Bar, respectively. The experimental results showed that the properties of RCAs were improved after the carbonation treatment. This resulted in performance enhancement of the new concrete prepared with the carbonated RCAs, especially an obvious increase of the mechanical strengths for the concrete prepared with the 100% carbonated new RCAs. Moreover, the replacement percentage of natural aggregates by the carbonated RCAs can be increased to 60% with an insignificant reduction in the mechanical properties of the new concrete.
URI: http://hdl.handle.net/10397/43427
ISSN: 0958-9465
EISSN: 1873-393X
DOI: 10.1016/j.cemconcomp.2015.10.018
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