十多年前,我们就着手用“石子比表面积法”进行特细砂混凝土的配合比设计。这个方法,在混凝土的配合比设计中,不用“砂率”,而用石子的比表面积及包裹石子的水泥砂浆薄膜厚度来确定石子的用量,并用绝对体积法的原理再确定其他各组成材料用量。一般认为,在工地上不便进行石子比表面积的测定,故无法采用这种方法进行混凝土的配合比设 More than a decade ago, we began to use the “stone surface area method” to design the mix ratio of ultra-fine sand concrete. This method, in the mix design of concrete, does not use the “sand rate”, but uses the specific surface area of ​​the stone and the thickness of the cement mortar film wrapping the stone to determine the amount of stone, and determine the amount of other components using the principle of the absolute volume method. . It is generally believed that the determination of the specific surface area of ​​the stone is inconvenient at the construction site, so it is not possible to use this method for concrete mixing.