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石粉屑是石灰石破碎所得余弃物。其特点是:质地坚硬,有尖锐棱角,表面粗糙,粘结性能好。我们进行了用石粉屑做混凝土细骨料的研究,认为石粉屑能够配制出质量优良的混凝土,并且还能节约水泥,降低成本。1. 石粉屑的物理性能砂子同石子一样,其质量好坏,直接影响混凝土质量。砂子的质最主要取决于空隙率,而容重、比重和级配等与空隙率有关。我们把拌制混凝土用的河砂(文水河产,下同) 同石粉屑进行了比较,详见表1。
Stone dust is the residue of broken limestone. Its characteristics are: hard texture, sharp edges and corners, rough surface, good bonding properties. We studied the use of stone powder as concrete fines, and we believe that stone powder can be used to formulate concrete with good quality, and it can also save cement and reduce costs. 1. The physical properties of stone dust are the same as those of gravel. Its quality is good and it directly affects the quality of concrete. The quality of sand depends mainly on the porosity, and the bulk density, specific gravity and gradation are related to the porosity. We compare the river sand used for mixing concrete (Wenshuihe, the same below) with stone dust, as shown in Table 1.