当下普通混凝土配合比计算方法的选择探讨

Discussion on Selection of Computing Method of Current Ordinary Concrete Mix Ratio

针对当下混凝土中矿物掺合料多,材料变化大的特点,探讨了质量法和体积法计算结果对混凝土拌合物体积的影响。结果表明,质量法计算结果粗略,混凝土拌合物容易出现"亏方"或"胀方"。而体积法计算结果精确,混凝土拌合物的体积计算值与实测值大小表现一致。因此,当下普通混凝土配合比设计应采用体积法进行计算。

According to the characteristics of much mineral admixture and big change of material in concrete,the influence of results calculated with mass and volume methods on concrete mixing volume is discussed. The result shows that the calculation result with mass method is rough,so concrete mixture is prone to ＂deficiency＂or ＂expansion＂,while the calculated value of concrete mix is consistent with the measured value for the result calculated with volume method is accurate.Therefore,the volume method should be used for the design of ordinary concrete.