混杂纤维锂渣混凝土力学性能研究

锂渣粉掺入混凝土中可有效提高混凝土的耐久性能,但是对其延性影响较小。在C50锂渣混凝土中掺入聚丙烯纤维和钢纤维以研究纤维对混凝土立方体抗压强度、轴心抗压强度、劈裂抗拉强度的影响。聚丙烯纤维对普通混凝土抗压强度呈不利影响,但0.9kg/m3时有助于提高混杂纤维混凝土的抗压强度,此外掺量在3.6kg/m3时,抗拉强度达到峰值。钢纤维可有效提高混凝土抗压、拉强度,单掺时抗压、拉可提高47.66%、94.50%。两种纤维复掺时表现出更优的性能。另外还对纤维混凝土作用机理进行了分析。

Experimental study on the mechanical properties of the lithium slag and hybrid fiber reinforced concrete

Lithium slag powder can improve the durability of concrete effectively, but it has little effect on ductility. The effect of polypropylene fiber and steel fiber on the compressive strength, axial compressive strength and splitting tensile strength of concrete in C50 lithium slag concrete is studied. Polypropylene fiber has a negative effect on the compressive strength of ordinary concrete, but 0.9kg/m3 can be helpful to improve the compressive strength of hybrid fiber reinforced concrete and 3.6kg/m3 make the tensile strength reach the peak value. Steel fiber can improve concrete compressive strength, tensile strength and compressive strength, single mixing could increase 47.66%, 94.50%. Hybrid fiber fiber show better performance. In addition, the mechanism of fiber reinforced concrete is analyzed.