七、混凝土冬期施工方法(一)混凝土拌合物的制备1.原材料的制备(1)水泥规范规定“配制冬期施工的混凝土,应优先选用硅酸盐水泥或普通硅酸盐水泥。水泥标号不应低于325~#”。这是由于,水泥的水化反应和一般化学反应一样,和温度有 VII. Concrete winter construction method (1) Preparation of concrete mixture 1. Preparation of raw materials (1) Specification for cement “Preparation of concrete for construction in winter should be preferably using Portland cement or ordinary portland cement. Should be lower than 325~#". This is because the hydration reaction of cement is the same as general chemical reaction and