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混凝土是以标准养护28天试体强度做为质量检查、工程验收的依据。现在许多部门为了工程需要,用3天及7天强度推算28天强度值,这种方法虽然可以早期知道混凝土强度,但对于现场质量检查仍感时间太长。近年来,许多基建部门及科研单位采用使混凝土试体快速硬化的方法来早期推定28天强度,这些快测方法已在各地推广
Concrete is based on standard maintenance 28 days test body strength as the basis for quality inspection, project acceptance. Many departments now use the strength of 3 days and 7 days to calculate the 28-day strength value for engineering purposes. Although this method can be used to know the strength of concrete early, it still has a long time for on-site quality inspection. In recent years, many infrastructure departments and research institutes have used the method of making concrete specimens harden quickly to estimate the strength for 28 days. These rapid testing methods have been promoted in various places.