期刊
CEMENT & CONCRETE COMPOSITES
卷 35, 期 1, 页码 32-38出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2012.08.008
关键词
Durability; Recycled aggregate; Concrete; Silane; Water repellent treatment
资金
- Sun Hung Kei Properties Ltd.
- Hong Kong Polytechnic University
- National Basic Research Program of China (973 Program) [2009CB623203]
- key project of National Natural Science Foundation of China [50739001]
- National Natural Science Foundation of China [50878109]
This paper aims to investigate the durability properties of recycled aggregate concrete treated with silane-based water repellent agents, since the high water absorption of recycled aggregate concrete is a major factor jeopardizing its durability. Different dosages of silane-based water repellent agents were either coated on the surface of the concrete (hereafter surface silane treatment) or integrally added into the concrete mixture (hereafter integral silane treatment). The mechanical and durability properties of the treated concrete were evaluated. It was found that integral silane treatment can improve the durability of recycled aggregate concrete, but may lead to reductions in compressive strength; surface silane treatment is more effective in improving the resistance of recycled aggregate concrete to capillary water absorption, carbonation and chloride penetration than integral silane treatment. (C) 2012 Elsevier Ltd. All rights reserved.
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