Fuller曲线用于机制砂最优级配的探索

The application of Fuller curve in the optimal gradation of machine-made sand

通过重新定义机制砂颗粒级配的准确范围,研究了不同机制砂定义下细骨料的级配变化和对分筛余百分数以及细度模数的影响,结果表明细度模数不能反应机制砂的根本特征,而根据Fuller曲线配制的机制砂可以得到最大的堆积密度和最小的孔隙率,此时机制砂的级配处于第Ⅰ区间,而不是通常的中砂区域。

By redefined accurately distribution range for mechanism of sand grain size,researched the different mechanism of sand of fine aggregate gradation change under the definition and the portion screen residue percentage and the influence of fineness modulus,the results showed that the fineness modulus can’t reaction the fundamental characteristics of mechanism of sand,and according to the mechanism of sand under fuller curve configuration can get the maximum packing density and minimum porosity,the mechanism of sand grading in the first Ⅰ interval,instead of the usual medium sand area.