在苏联某些地区,由于缺乏优质粗集料,常常采用当地出产的砂子配制无粗集料的水泥混凝土,称为砂混凝土,这在经济上是合理的。但是,按普通工艺制备的这种砂混凝土,与同标号的普通混凝土相比,水泥用量较高(250～450kg/m~3),混凝土的收 In some parts of the Soviet Union this is economically justified due to the lack of quality coarse aggregate, often using locally produced sand to formulate coarse aggregate free of cementitious concrete, called sand concrete. However, compared with ordinary concrete with the same label, the sand concrete prepared according to the ordinary process has higher amount of cement (250-450 kg / m 3), concrete