确定最佳含砂率,就是要在确保砼拌合物各项性能满足设计要求的前提下,使拌合物获得最大流动性、良好的粘聚性和保水性。为了确定合理的含砂率,首先需要确定石子的空隙率。我们在2155.2cm~3的容量中,装平了10～15mm粒径的石子,重量为2037g,这时将水注入容器中,用水的体积来补充石子的空隙,加入水的体积为981cm~3,通过计算,石子的空隙率为45.5%。并根据试验可知,不同的石子级配,所得的石子空隙 The determination of the optimum sand content is to ensure that the mix has maximum fluidity, good cohesion, and water retention, while ensuring that the properties of the concrete mixture meet the design requirements. In order to determine a reasonable sand content, you first need to determine the porosity of the stone. In the capacity of 2155.2cm~3, we packed 10~15mm stones with a weight of 2037g. We injected water into the container and filled the gap with the volume of water. The volume of water added was 981cm~3. By calculation, the porosity of the stone is 45.5%. And according to the test, different gravel gradations, the resulting stone voids