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目前,一些施工部门对最大粒径为31.5mm 的石子配制的混凝土能否使用边长100 mm 的立方体试模制作试件存在分歧。有的说,根据现行《混凝土结构工程施工及验收规范》(GB 50204—92)的规定,石子最大粒径已超过30mm,不能使用;有的说,31.5mm 与30mm 相比差不了太多,可以使用。国标 GB 50204—92是1992年9月25日颁布、1993年5月1日开始实施的,在颁布之前,配制混凝土的石子粒径按老标准有
At present, some construction departments have different opinions on whether concrete made of stones with a maximum particle size of 31.5 mm can use cube test molds with a length of 100 mm. Some said that according to the current “Code for the Construction and Acceptance of Concrete Structures” (GB 50204-92), the maximum particle size of the stone has exceeded 30mm and cannot be used; some say that 31.5mm is not much worse than 30mm. can use. The national standard GB 50204-92 was promulgated on September 25, 1992, and was implemented on May 1, 1993. Prior to its promulgation, the particle size of the stones used to make concrete was in accordance with the old standard.