不同比例混杂纤维再生混凝土的力学性能试验研究

Experimental Study on Mechanical Properties of Recycled Concrete with Different Proportion of Hybrid Fiber

通过控制两种纤维在再生混凝土的总掺入量,改变聚丙烯腈纤维和聚丙烯仿钢纤维的掺入比例,来探究其对混凝土力学性能的影响。结果显示,单掺聚丙烯腈纤维或聚丙烯仿钢纤维对再生混凝土抗压及抗折强度都有提升作用,当其比例为1:1时,提升效果最为明显;对于混凝土的劈裂抗拉强度,由于聚丙烯腈纤维的抗拉强度较好,单掺聚丙烯腈纤维提高效果更为显著。

This paper controlls the total blending amount of two kinds of fibers in recycled concrete,and investigates the influence of polypropylene waxen fiber and polypropylene copper-like fiber on the mechanical properties of concrete by changing the blending proportion.As a conclusion,the single-doped polyacrylonitrile fiber or polypropylene imitation steel fiber has an improvement effect on the compressive and flexural of recycled concrete,and when the ratio was 1:1,the lifting effect was the most obvious.Because polyacrylonitrile fiber has superduper tensile strength,the lifting effect of poiycarylonitrile fiber is more significant in the splitting tensile strength of concrete.