混凝土强度的推算公式有很多种,各有其特点和适用范围。现就本人积累的混凝土强度资料经数理统计,分析如下: 我们选用了171组普通硅酸盐水泥和80组矿渣水泥配制的混凝土R_7和R_(28)的资料,考虑两者水泥的早期强度发展不一,所以分别整理,用最小二乘法计算,几项主要统计指标如下:(见表1) There are many formulas for calculating the strength of concrete, each with its own characteristics and applicable scope. Now I accumulated the concrete strength of the data by mathematical statistics, analysis is as follows: We selected the 171 sets of portland cement and 80 sets of slag concrete cement R_7 and R_ (28) of the information, consider both the early strength of cement development Different, so sorted, using the least squares method, several major statistical indicators are as follows: (see Table 1)