基于引气剂优选的C35墩身高性能清水混凝土的配

关键字：引气剂,优选,C35,墩身,高性能,清水

（1. 中国路桥工程有限责任公司，北京  100011；2.中国建筑科学研究院，北京  100013）

 
    摘要：研究了引气剂种类及掺量对C35墩身清水混凝土拌合物性能、抗压强度和外观质量的影响。结果表明，A类松香类引气剂对混凝土拌合物和易性改善效果最好，在满足混凝土拌合物性能的前提下，掺量最低，产生气泡数量最少，大气泡比例最低，硬化混凝土抗压强度最高、外观质量最优。现场试验表明，采用A类松香类引气剂配制的混凝土拌合物泵送效果良好，墩身回弹强度合格，外观质量达清水混凝土要求。
    关键词：引气剂；拌合物性能；抗压强度；外观质量；施工效果
    中图分类号：TU528.38        文献标识码：A        文章编号：1001-702X（2017）10-0051-04

Research on mixing technologies of C35 fair-faced high performance concrete based
on the optimization of air-entraining additive
ZHANG Bing1，LI Zhiqiang1，SONG Putao2，XIA Jingliang2，WANG Jing2
（1.China Road and Bridge Corporation，Beijing 100011，China；
2.China Academy of Building Research，Beijing 100013，China）

    Abstract：This paper studied the influence of different types of air-entraining additive and content on working ability，compressive strength as well as appearance quality of C35. The results show that improvement effect of A rosin type air-entraining agent on workability is the best. On the premise of meeting the properties of concrete mixing materials，the lowest content of A rosin type air-entraining agent，can made the minimum number of bubbles，minimum ratio of gross blowhole，highest compressive strength and optimum appearance quality. The field investigation shows that pumping effect of concrete mixing materials produced by A rosin type air-entraining agent is favorable with qualified rebound strength of the body and appearance quality of meeting concrete requirements.
    Key words：air-entraining agent，working ability，compressive strength，appearance quality，construction effect