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一、实施中的问题《钢筋混凝土工程施工及验收规范》(GBJ204-83)从1984年7月1日实施到现在已经三年多了。这本规范与规范(GBJ1065)(修订本)相比,在评定混凝土强度方面有三条明显的改变,其一是确定以15cm立方体试块为基准;其二是试块数量在10组以上时,采用正态分布统计方法计算混凝土的强度指标;其三是当一组试块中的过大或过小的强度值,与中间值相比超过15%时,以中间值代表该组的混凝土试块的强度。这些改变无疑使混凝土的强度评定趋向科学合理,更切合实际情况。但是,在三年多的
First, the implementation of the “Code for Construction and Acceptance of Reinforced Concrete Works” (GBJ204-83) has been implemented since July 1, 1984 to now more than three years. Compared with the standard (GBJ1065) (revised edition), this specification has three significant changes in the evaluation of concrete strength. One is to determine the 15cm cube as the benchmark; the second is to use more than 10 groups of test blocks. The normal distribution statistical method is used to calculate the strength index of the concrete; the third is when the strength value of a group of test blocks is too large or too small, and when the median value exceeds 15%, the middle value represents the concrete test of the group. The strength of the block. These changes will undoubtedly make the evaluation of the strength of concrete more scientific and reasonable and more practical. However, in more than three years