Experimental study on CO2 curing for enhancement of recycled aggregate properties

被引：284

作者：

Zhan, Baojian ^{[1
]}

Poon, Chi Sun ^{[1
]}

Liu, Qiong ^{[1
]}

Kou, Shicong ^{[1
]}

Shi, Caijun ^{[2
]}

机构：

[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China

[2] Hunan Univ, Coll Civil Engn, Minist Educ, Key Lab Bldg Safety & Energy Efficiency, Changsha 410082, Hunan, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 67卷

关键词：

Recycled aggregate; CO2; curing; Improvement; Properties; CONCRETE; CARBONATION; SURFACE; WASTE;

D O I：

10.1016/j.conbuildmat.2013.09.008

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this paper, the results of an experimental program on studying the use of a carbonation process to enhance the properties of recycled aggregates are presented. Hardened concretes prepared by using different water-to-cement ratios in the laboratory, were crushed to produce recycled aggregates with different particle sizes. Before and after the laboratory carbonation process, the physical properties of the recycled aggregate, including water absorption and density were determined. The extent of CO2 curing of the recycled aggregate was quantified by assessing the carbonation percentage of the aggregates. Carbonation resulted in reduction in water absorption values and increase in density and these showed that the properties of recycled aggregate were improved. The factors influencing the CO2 curing process, including curing time, particle size and moisture contents of the recycled aggregate, were investigated. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：3 / 7

页数：5

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