大体积泵送混凝土施工几个关键问题处理

Solution of the Key Problems in Mass Pumped Concrete Construction

针对阜阳市南京路泉河大桥主墩承台混凝土施工中所面临的大体积、早强、缓凝泵送混凝土等一连串相互矛盾的问题,通过大量实验,应用双掺技术,确定混凝土的最佳配合比,采用外保内散的养护措施,取得了较好的效果。

Early strength gain is unfavorable to the slow curing of mass pumped concrete. This article introduces that in the successful construction of a bridge＇s concrete pier, double admixing technique is used, the optimum mix proportioning of the concrete is fixed based on the extensive trials, the maintaining measure of temperature lowering outside and heat dissipation inside is put forward.