沙漠砂锂渣聚丙烯纤维混凝土基本力学性能试验研究

Experimental Study on Basic Mechanical Properties of the Desert Sand Concrete with Lithium Slag and Polypropylene Fiber

通过试验分析了3 d、7 d、28 d时不同沙漠砂替代率对锂渣聚丙烯纤维混凝土立方体抗压强度、轴心抗压强度和劈裂抗拉强度的影响规律。结果表明:在锂渣掺量20%,聚丙烯纤维1.5 kg/m3时,利用沙漠砂替代锂渣聚丙烯纤维混凝土中细度模数小于3的工程用砂成效显著,具有深远的社会意义和优越的经济价值。随着沙漠砂替代率增大,沙漠砂混凝土抗压强度和劈裂抗拉强度均呈先增大后减小趋势,其中当沙漠砂替代率为30%时为最优掺量,较基准组28 d抗拉强度提高53.26%。

Through the experimental analysis of the 3 d,7 d,28 d different desert sand replacement rate of lithium slag of polypropylene fiber concrete cube compressive strength,axial compressive strength and splitting tensile strength,results showed that in 20% of the dosages of lithium slag,polypropylene fiber 1. 5 kg / m3,utilization of desert sand instead of lithium slag polypropylene fiber concrete fineness modulus of less than 3 of engineering with the sand effect is significant,with far-reaching social significance and superior economic value. With the desert sand replacement rate increases,desert sand concrete compressive strength and splitting tensile strength was first increased and then decreased,which when desert sand replacement rate of 30% for the optimal dosage,compared with the reference group 28 d tensile strength improve 53. 26%.