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为了检查混凝土结构的混凝土质量,以前采用28天压缩强度试验。但用这种方法判断时,混凝土已硬化,如判断结果不满足标准值,除去不良混凝土很困难,因此,有必要早期判断。加拿大用的K-5混凝土早期强度判断器,可以5小时的强度推定28天的压缩强度,精度为±13％,同时操
In order to check the quality of the concrete structure of the concrete, previously used 28 days compressive strength test. However, when judged by this method, the concrete has hardened. If the judgment result does not satisfy the standard value, it is very difficult to remove the bad concrete, so it is necessary to judge early. Canada K-5 concrete early strength tester, the 5-hour strength can be estimated 28-day compression strength, accuracy of ± 13% at the same time