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自《钢筋混凝土工程施工及验收规范》(GBJ204-83)将混凝土标准试块定为15cm的立方体以及中华人民共和国法定计量单位颁布后,原按《钢筋混凝土工程施工及验收规范》(GBJ 10 65)修订本以20cm的立方体为为标准试块,压强采用非法定计量单位(kg/cm~2)建立的早期推定混凝土强度关系式应作相应的修正,本文介绍我们的修正方法。按《早期推定混凝土强度试验方法》(JGJ 15 83)以20cm的立方体为标准试块,压强采用非法定计量单位kg/cm~2建立的早期推定混凝土强度的关系式为:R_(20)~(28)=
After the “Standard for Construction and Acceptance of Reinforced Concrete Projects” (GBJ204-83) has set the concrete standard test block as a 15cm cube and the legal metrological unit of the People’s Republic of China promulgated, the original “Code for Construction and Acceptance of Reinforced Concrete Works” (GBJ 10 65) ) The revised version uses a 20cm cube as the standard test block. The early established concrete strength relationship established by the use of illegally fixed units of measurement (kg/cm~2) should be modified accordingly. This article describes our revised method. According to the “Early Predicated Concrete Strength Test Method” (JGJ 15 83), a 20-cm cube is used as the standard block, and the relationship between the pressure and the early-presumed concrete strength established by the illegally fixed unit of measurement kg/cm~2 is: R_(20)~ (28)=