低收缩C70自密实大体积混凝土的配制  

Preparation of the low-shrinkage of C70 self-compacting large-volume concrete

作　　者：余成行 洪敬福 王友超 

机构地区：[1]北京市中超混凝土有限责任公司,北京100024

出　　处：《混凝土》2015年第10期102-108,112,共8页Concrete

摘　　要：分析了复杂型钢组合结构内浇C70混凝土的特点和难点,按照大掺量粉煤灰高性能混凝土的技术路线进行了混凝土配合比设计,并对比检测了膨胀剂、减缩剂和内养护剂在变温养护下的功能效果。试验结果表明,掺加一定量的预吸水的内养护剂后,C70内浇自密实大体积混凝土的自收缩能够满足工程质量控制要求。It analyzed the characteristics of C70 inner casting concrete and the difficulties of complex-shaped steel composite structurel,in accordance with the technical line of high-performance large-volume fly ash concrete were concrete mix design,and comparison test of expansive agent and shrinkage-reducing agent and internalcuring agent in the functionality under varying temperature effects.The results show that after adding a certain amount of pre-absorbent water internal curing material,C70 inner casting large-volume of autogenous shrinkage of self-compacting concrete can meet the engineering quality control requirements.

关 键 词：复杂型钢组合结构 低收缩 内养护剂 变温养护 

分 类 号：TU528.53[建筑科学—建筑技术科学]