混杂钢纤维对高强再生混凝土基本力学性能的影响

Effect of hybrid steel fiber on basic mechanical properties of high strength recycled concrete

为研究混杂钢纤维对高强再生混凝土基本力学性能的影响,通过改变钢纤维的不同掺合方式,进行了抗压强度、劈拉强度、弹性模量等的试验。结果表明,在高强再生混凝土中掺入钢纤维对于抗压强度影响不大,却可以显著提高劈裂抗拉强度,同时能够显著提高拉压比及弹强比。其中当混掺钢纤维BC时,能够显著提高高强再生混凝土的韧性。

In order to study the effect of hybrid steel fibers on the basic mechanical properties of high strength recycled concrete,the compressive strength,splitting tensile strength and elastic modulus were tested by changing the different mixing modes of steel fibers. The results show that the addition of steel fibers in high strength recycled concrete has little effect on the compressive strength,but can significantly improve the splitting tensile strength,as well as the tension-compression ratio and elastic strength ratio. When steel fiber BC is mixed,the toughness of high strength recycled concrete can be significantly improved.