工作中接触到对钢管防腐使用的 水泥混合物(水泥,沙子和水拌合物)中CaCl2和硫酸盐含量做了规定,但是没有提及测试方法,求助 目前国标或者行业标准,包括ISO和ASTM有具体的测试标准吗?
Total amount of chlorides in concrete mix, calculated as free calcium chloride (CaCl2) shall not exceed 0.4% of the cement weight.
混凝土中,CaCl2≤0.4%
Total amount of sulphate in the concrete mix, calculated as sulphur trioxide (SO3) shall not exceed 3.5% weight of concrete.
混凝土中,亚硫酸钙含量≤3.5%