ballast concrete meaning in English

石碴混凝土
石渣混凝土
碎石混凝土

Next was an experimental study on modification of stone ballast concrete small hollow block . the influence of polypropylene fiber , expansion agent and both of them on permeability - resistance and both moisture expansion and dry shrinkage of the block were systematically tested . the testing results and theoretical analysis slowed that they all can improve its properties , among which polypropylene fiber can most effectively restrain it ’ s moisture expansion and drying shrinkage ; however , the block doubly blended with polypropylene fiber and expansion agent will be likely to most beneficially improve crack - resistance of wall filled with the block
试验结果和理论分析表明,单掺聚丙烯纤维、单掺膨胀剂和双掺聚丙烯纤维与膨胀剂均能改善混凝土空心砌块的性能,其中,聚丙烯纤维更有利于限制单个砌块的湿涨干缩,单掺聚丙烯纤维的空心砌块湿胀干缩的波动性最小;双掺聚丙烯纤维与膨胀剂对限制石渣砌块湿胀干缩的效果不理想,但双掺砌块将更有利增强于砌块填充墙的整体抗裂性。