泵送混凝土楼板裂缝的原因分析及预防

某矿区棚改房的结构形式采用现浇混凝土框架结构,楼板采用现浇商品泵送混凝土施工,楼板厚度14 cm。在第2、第3层混凝土楼板施工完成后发现楼板存在很多不规则的裂缝。文章从混凝土配合比、混凝土浇捣养护、混凝土施工环境等方面分析了裂缝产生的原因及采用的预防措施。

Causes and Precautions of Pump Concrete Cracks on Floors

The structure of shed into a house in a mining anea takes the structune of cast-in-place reinforced concrete framework,the floor thickness is 14 cm which is constructed by cast-in-place commercial pumping concrete.After the pouring process,found that some irregular cracks appear in the second and third floors.This paper gives an analysis on the formation of cracks from aspects of concrete mixed proportion,cast-in-place concrete curing,concrete construction environment and gives related precautious.