钢-聚丙烯纤维增强人造花岗岩复合材料的制备与性能

为深入研究钢-聚丙烯纤维增强人造花岗岩复合材料（钢-聚丙烯纤维/人造花岗岩）抗压、抗弯强度的影响因素，通过排水法实验研究了骨料堆积的空隙率，确定了骨料级配和实验指数q并对大量试件进行了抗压、抗弯强度测试，分析了钢-聚丙烯纤维/人造花岗岩复合材料各组分质量分数、骨料堆积空隙率等因素对钢-聚丙烯纤维/人造花岗岩复合材料抗压、抗弯强度的影响。实验结果表明:钢纤维与聚丙烯纤维能够明显增大钢-聚丙烯纤维/人造花岗岩复合材料的抗弯强度，随着钢-聚丙烯纤维质量分数的增加，钢-聚丙烯纤维/人造花岗岩复合材料试件的抗压和抗弯强度都逐渐增大；当钢纤维与聚丙烯纤维质量比为30∶1、钢-聚丙烯纤维质量分数为1.7wt%时，钢-聚丙烯纤维/人造花岗岩复合材料试件的抗压强度达到最大，当钢-聚丙烯纤维质量分数为1.9wt%时，钢-聚丙烯纤维/人造花岗岩试件的抗弯强度达到最大；黏结剂质量分数越接近骨料堆积空隙率，钢-聚丙烯纤维/人造花岗岩复合材料试件的抗压和抗弯强度越大，当骨料质量分数为80wt%、黏结剂质量分数为11wt%时，钢-聚丙烯纤维/人造花岗岩复合材料试件的抗压、抗弯强度同时达到最大。 

Preparation and properties of steel-polypropylene fiber reinforced artificial granite composite

In order to further study the influence factors of compressive strength and flexural strength of steel-polypropylene fiber reinforced artificial granite (steel polypropylene fiber/artificial granite) composite, the void ratio of aggregate accumulation was studied by drainage method. The aggregate gradation and experimental index q were determined, and the compressive strength and flexural strength of a large number of specimens were tested. The influences of the mass fraction of each component and the void ratio of aggregate on the compressive strength and flexural strength of the steel polypropylene fiber/artificial granite composite were analyzed. The experimental results show that steel fibers and polypropylene fibers can significantly increase the flexural strength of steel polypropylene fiber/artificial granite composite. With the increase of the content of steel-polypropylene fibers, the compressive strength and flexural strength of the steel polypropylene fiber/artificial granite composite specimens increase gradually. When the mass ratio of steel fibers to polypropylene fibers is 30∶1 and the content of steel-polypropylene fiber is 1.7wt%, the compressive strength of the steel polypropylene fiber/artificial granite composite specimens increases gradually. The flexural strength of the steel polypropylene fiber/artificial granite specimens reaches the maximum when the steel-polypropylene fiber content is 1.9wt%. The closer the mass fraction of binder to the void ratio of the aggregate, the greater the compressive strength and flexural strength of the steel polypropylene fiber/artificial granite composite are. When the aggregate is 80wt% and the binder is 11wt%, the compressive strength and flexural strength of the steel polypropylene fiber/artificial granite specimen reach the maximum at the same time.