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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0.9 kg/m~3时有助于提高混杂纤维混凝土的抗压强度,此外掺量在3.6 kg/m~3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。
Lithium slag mixed with concrete can effectively improve the durability of concrete, but its ductility less affected. In C50 lithium slag concrete, polypropylene fiber and steel fiber were mixed to study the effect of fiber on the compressive strength, axial compressive strength and splitting tensile strength of concrete cubes. Polypropylene fiber has an adverse effect on the compressive strength of ordinary concrete, but 0.9 kg / m ~ 3 will help to improve the compressive strength of hybrid fiber reinforced concrete. In addition, the tensile strength reaches the peak value when the dosage is 3.6 kg / m ~ 3 . Steel fiber can effectively improve the compressive strength and tensile strength of concrete, compressive strength when single doped, can increase 47.66%, 94.50%. Both fibers exhibit better performance when complexed. In addition, the mechanism of action of fiber concrete is also analyzed.