为确保混凝上结构工程的质量,必须使用合格的水泥、粗或细骨料,必须对混凝上中掺用的外加剂加以选择和经试验加以确定。要求水泥进场必须有出厂合格证或进场试验报告。当时水泥质量有怀疑或水泥出厂时间超过三个月时,或用于承重结构的水泥,必须进行复查试验,并按试验结果使用。混凝土所用的粗、细骨料,其质量应符合国家现行标准的规定。 In order to ensure the quality of structural work on coagulation, qualified cement, coarse or fine aggregates must be used. The admixtures used in coagulation must be selected and tested. Requires cement into the factory must have a certificate or entry test report. At that time, when the quality of cement was suspected or the cement was delivered for more than three months or the cement used for load-bearing structure had to be reviewed and tested according to the test results. Concrete used coarse, fine aggregate, its quality should be consistent with the provisions of the current national standards.