现场废弃混凝土制造再生混凝土冻融前后性能的研究  

Performance of Recycled Aggreate Concrete Made from Waste Concrete on Construction Site before and after Freeze-thaw

作　　者：孙连波 葛大勇 任福民[2] 梁锐[2] 王政[2] 郝慧明[2] 

机构地区：[1]中铁建设集团北京分公司第十三项目部,北京100040 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《环境卫生工程》2013年第6期33-34,37,共3页Environmental Sanitation Engineering

基　　金：铁道部科技研究计划项目(2011Z001A)

摘　　要：采用施工现场废弃混凝土制备再生骨料混凝土试验结果表明:替换70%以下的天然骨料时,可以配置比设计强度低1个标号的混凝土,其强度和劈裂强度均满足要求。其冻融循环200次后抗压强度增加明显,劈裂强度有增加,也有降低,材料脆性增大。The test of recycled aggreate concrete made from waste concrete on construction site was carried out. And the results showed that the waste concrete was used as recycled aggregate materials replacing the materials under 70% natural aggregate to produce a new type of concrete. The concrete has one cement mark lower than design strength, and its strength and splitting strength meets the requirements. The compression strength increased obviously after 200 cycles of freezing and thawing, the splitting strength changed uncertainly, and the material brittleness increased.

关 键 词：废弃混凝土 再生骨料混凝土 强度 

分 类 号：TU528[建筑科学—建筑技术科学]