Properties of concretes produced with waste concrete aggregate

被引:449
作者
Topçu, IB [1 ]
Sengel, S [1 ]
机构
[1] Osmangazi Univ, Dept Civil Engn, TR-26480 Eskisehir, Turkey
关键词
waste concrete; workability; strength; durability;
D O I
10.1016/j.cemconres.2003.12.019
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
An environmentally friendly approach to the disposal of waste materials, a difficult issue to cope with in today's world, would only be possible through a useful recycling process. For this reason, we suggest that clearing the debris from destroyed buildings in such a way as to obtain waste concrete aggregates (WCA) to be reused in concrete production could well be a partial solution to environmental pollution. For this study, the physical and mechanical properties along with their freeze-thaw durability of concrete produced with WCAs were investigated and test results presented. While experimenting with fresh and hardened concrete, mixtures containing recycled concrete aggregates in amounts of 30%, 50%, 70%, and 100% were prepared. Afterward, these mixtures underwent freeze-thaw cycles. As a result, we found out that C16-quality concrete could be produced using less then 30% C14-quality WCA. Moreover, it was observed that the unit weight, workability, and durability of the concretes produced through WCA decreased in inverse proportion to their endurance for freeze-thaw cycle. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1307 / 1312
页数:6
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