在混凝土中,要求粗骨料能形成一种连续级配,各种粒径的粗骨料能以一定的比例搭配,形成一个密实填充系统,这样制成的混凝土和易性好,不易发生分层和离析的现象,本文通过试验探索不同颗粒级配对干粉砂浆工作性能、力学性能和耐久性能的变化情况,综合比较和经济成本分析,当在确定的配合比下使用颗粒级配合理的中砂可使得干粉砂浆的性能良好、成本最低,优于细砂与粗砂。 In concrete, the requirement of coarse aggregate to form a continuous grading, a variety of particle size of the coarse aggregate with a certain ratio with the formation of a dense filling system, so made of concrete and easy to work, easy to occur Layer and segregation phenomenon, this paper through experiments to explore different particle size distribution of dry mortar performance, mechanical properties and durability changes, comprehensive comparison and economic cost analysis, when the use of the particle size with a reasonable mix of sand Can make the performance of dry mortar good, the lowest cost, better than fine sand and coarse sand.