讨论了现有自密实混凝土配合比中骨料用量的取值方法,提出一种根据骨料性质计算骨料用量的方法,该方法利用砂浆富裕系数f和砂浆中砂的体积分数s进行计算。建立了f、s与粗骨料空隙率K之间的关系,f根据K计算,s根据f和砂的细度模数计算。优化SCC配合比设计,减少试配工作量,并举例说明计算方法。 The method of calculating the amount of aggregate used in the existing self-compacting concrete mix is ​​discussed. A method for calculating the amount of aggregate based on the properties of the aggregate is proposed. The method uses the coefficient of richness of mortar f and the volume fraction s of sand in the mortar. The relationship between f, s and the void fraction K of coarse aggregate was established, f was calculated from K, and s was calculated from the modulus of fineness of f and sand. Optimize SCC mix design, reduce trial workload, and illustrate the calculation method.