用计算机评定砼用砂的颗粒级配于俊荣（丹东纺织工业专科学校）马英俊（中国建研院机械化所廊坊）砼中砂粒之间的空隙是由水泥浆填充的。为达到节省水泥和提高砼强度的目的，应尽量减小砂粒之间的空隙，所以一般用大小不同的砂颗粒搭配。砂的颗粒级配是指集料中不同尺寸颗... Using computer to evaluate the particle size distribution of the sand using Yu Junrong (Dandong Textile Industry College) Ma Jun (China Academy of Engineering Mechanization, Langfang) The gap between the sand grains is filled with grout. In order to achieve the goal of saving cement and improving the strength of the concrete, the gap between the sand grains should be minimized. Therefore, sand grains with different sizes are generally used together. Sand particle size distribution refers to different sizes of aggregates...