【摘要】 通过对试验结果的研究分析得出机制砂的松散(紧密)堆积密度大于天然砂、空隙率小于天然砂、轻物质含量小于天然砂;且外表新鲜,棱角尖锐,天然砂则外表陈旧,棱角钝圆;同胶砂比同稠度的胶砂的抗压和抗折强度,机制砂的均显著大于天然砂。因此机制砂优于天然砂作混凝土细骨料。更多还原

【Abstract】 By analyzing the results of test,some conclusions are as follows.The bulk density of artificial sand weights is more than that of natural sand.The void of artificial sand is smaller than that of natural sand.The light material which artificial sand contains is less than that which natural sand contains.The artificial sand particle’s surfaces are fresh and edges are sharp.But the natural sand particle’s surfaces are old and edges are round,The compressive and bending strength of artificial sand is respectively greater than that of natural sand with the same mix and consistency of mastic cement.Hence,artificial sand is preferable to natural sand as concrete’s fine aggregate.更多还原