按照《钢筋混凝土工程施工及验收规范》第4·6·3～4·6·7条的规定,混凝土的抗压强度是根据标准养护28天的试块试压结果来评定的。但是,在实际施工中,由于管理不善,常常会发生试块漏做、编号搞混,或对试块的代表性存在怀疑等情况。这时,要了解结构构件的实际强度,就需要用非破损检验方法在构件上直接测试。 According to the provisions of Article 4.6·3·4·6·7 of the “Code for Construction and Acceptance of Reinforced Concrete Engineering”, the compressive strength of concrete is evaluated according to the pressure test results of a standard block for 28 days. However, in the actual construction, due to poor management, it often happens that the test block is missing, the number is mixed, or the representative of the test block is in doubt. At this time, to understand the actual strength of the structural member, it is necessary to directly test the member with a non-destructive inspection method.