玄武岩纤维对再生混凝土力学性能的影响研究

通过试验研究了玄武岩纤维掺量对再生粗骨料取代率50%的再生混凝土抗压、劈裂抗拉以及抗折强度的影响,为其在玄武岩纤维再生混凝土(BFRAC)的研究和实际工程应用中提供参考。结果表明:再生粗骨料取代率为50%,玄武岩纤维掺量为6kg/m时,BFRAC的立方体抗压、轴心抗压、劈裂抗拉、抗折强度较未掺玄武岩纤维的再生混凝土分别提高了 12.8%、3.1%、48.8%、10.5%;BFRAC的峰值应变在0.001900-0.002120;BFRAC的单轴受压应力-应变本构关系全曲线与普通混凝土相似,玄武岩纤维对再生混凝土的延性起到积极作用。

Effect of basalt fiber on mechanical properties of recycled concrete

In this paper, the effects of different basalt fiber content on the compressive strength, splitting tensile strength and flexural strength of recycled concrete under 50% replacement rate of recycled aggregate were studied by using basalt fiber. Provide a theoretical reference for the research and practical engineering applications of basalt fiber recycled aggregate concrete (BFRAC). The results show that when the replacement ratio of recycled coarse aggregate is 50% and the amount of basalt fiber is 6 kg/m, the compressive strength of BFRAC is 12.8% higher than that of RAC , the axial compressive strength is increased by 3」%,the splitting tensile strength is increased by 48.8%,and the flexural strength is increased by 10.5%;The peak strain of BFRAC is between 0.001900 and 0.002120. The uniaxial compressive stress-strain constitutive relationship of basalt fiber recycled concrete is similar to ordinary concrete, at the same time, the fiber plays a positive role in the ductility of recycled concrete.