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地暖上边浇筑砼，砼标号不低，地面为什么会出现起砂裂纹现象呢？ - 工程施工 - 项目管理 - 氿上知道
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满意答案
2.砼标号过大（一般不大于c20）易造成砼面层收缩和开裂。
3.面层起砂现象时有与养护不当造成的，应在砼面层达到初凝以后进行养护。过早会造成砼面层跑浆起沙，过完会造成砼面层干燥起沙。
起沙处理方法：
充分清理干净，用水充分湿润，无积水后用水泥和107胶调和至稠粥状，立即进行抹面。达到初凝后，用水湿润无积水，养护一星期可使用。
若砼面层开裂和起砂无法可施，重新施工。
马到成功
回答于：2014-01-10
共3条回答