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新编《钢筋混凝土工程施工及验收规范》(GBJ204-83)第4.6.7条关于混凝土试块组强度取值规定的根据,在很大程度上涉及概率问题。为此,本文从概率角度来解析混凝土试块组强度的取值原则,以有助于该条文规定的深入理解和正确执行。一、前提依据该条文强度取值原则的前提依据是:同盘混凝土总体强度 x 的分布密度函数遵从参数为μ、σ的 Gauss 分布,即:
The basis for the new “Regulations for Construction and Acceptance of Reinforced Concrete Projects” (GBJ204-83), Clause 4.6.7, on the determination of the strength of concrete test blocks, involves to a great extent the issue of probability. For this reason, this paper analyzes the principle of the strength of the concrete test block group from the perspective of probability to facilitate the deep understanding and correct implementation of the provision. First, the premise is based on the premise that the strength of the provisions of the article is based on the principle: the distribution density function of the overall strength x of the same concrete follows the Gauss distribution with parameters μ, σ, ie: