Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43474
Title: Influence of carbonated recycled concrete aggregate on properties of cement mortar
Authors: Zhang, J
Shi, C
Li, Y
Pan, X
Poon, CS 
Xie, Z
Keywords: Carbonation treatment
Chloride migration coefficient
Microstructure
Mortar
Recycled concrete aggregate
Shrinkage
Issue Date: 2015
Publisher: Elsevier
Source: Construction and building materials, 2015, v. 98, p. 1-7 How to cite?
Journal: Construction and building materials 
Abstract: This work investigated the effect of carbon dioxide treatment of recycled concrete aggregate (RCA) on the performance of RCA and RCA mortar. The results indicated that carbonation increased the apparent density, and reduced both water absorption and the crushing value of the RCA. The flowability and compressive strength of the RCA mortar were lower than those of natural sand mortar. However, the properties of mortar made with carbon dioxide treated RCA were very similar to those of natural sand mortar. Compared with the mortar made of un-carbonated RCA, the mortar made with carbonated RCA showed increased autogenous shrinkage, reduced drying shrinkage, water absorption, and chloride migration coefficient. Scanning electron microscope (SEM) examination on the interfacial transition zone (ITZ) in the RCA and RCA mortar found that carbonation treatment of RCA not only improved the original ITZ in the RCA, but also improved the newly formed ITZ in the RCA mortar.
URI: http://hdl.handle.net/10397/43474
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2015.08.087
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