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为保证钢筋混凝土构件的质量,在混凝土施工中,人们总结了几个“二次”法施工工艺。1.二次投料法传统的投料法是将砂、石、水泥、水和外加剂一次倒进搅拌机内,干水泥颗粒被砂石夹裹着,水泥不易均匀散开,遇水后,部分水泥结成小团粒,无法充分水化。二次投料法有很多种,其中比较简易的方法是预拌水泥砂浆法,即先将砂、水泥、水和外加剂倒进搅
In order to ensure the quality of reinforced concrete components, people have summarized several “secondary” construction techniques in concrete construction. 1. Secondary feeding method The traditional feeding method is to pour sand, stone, cement, water, and admixture into the mixer at a time. The dry cement particles are wrapped in sand and the cement is not easy to spread evenly. Small particles form and cannot fully hydrate. There are many kinds of secondary feeding methods, of which the more simple method is ready-mixed cement mortar method, that is, first pour the sand, cement, water and admixture into the stirrer.