人工砂混凝土配合比设计基本参数的确定

摘要

人工砂颗粒表面特征及级配异于河砂,对混凝土的性能影响较大。本文通过大量的试验以确定人工砂混凝土配合比设计中的基本参数(单方用水量、砂率、回归系数αa 与αb),并得出：同条件下,配制人工砂混凝土单方用水量宜增加(2~8) kg,砂率增加(2~4)%。%Particle surface characteristics and grading of artificial sand are different of river sand,and have a great impact on performance of concrete. The article determined mix proportion design basic parameters such as unilateral water,sand-aggregate ratio and regression coef-ficient αa andαb of artificial sand concrete by a large number of tests. At the same time,It can be concluded that for artificial sand concrete, increasing of unilateral water by 2-8kg and sand-aggregate ratio by 2-4% under the same conditions would be the best.