玄武岩纤维混凝土受拉性能试验研究与分析

Experimental study and analysis on tensile performance of basalt fiber concrete

通过不同体积掺量(0%,0.1%,0.2%,0.3%,0.4%,0.5%,0.6%)的玄武岩纤维混凝土直接拉伸试验,得到玄武岩纤维混凝土的受拉应力-应变全曲线,对比试验现象、破坏形态、抗拉强度、弹性模量、断裂能、裂缝宽度、特征长度,运用拟合回归的方法得到玄武岩纤维混凝土受拉状态下的各性能参数与玄武岩纤维体积掺量之间的关系式,并结合Hillerborg提出的特征长度的概念,对玄武岩纤维混凝土的韧性性能和抗裂性能进行研究。研究结果表明,玄武岩纤维的掺入可以提高混凝土的抗拉强度,并改善混凝土的韧性性能和抗裂性能。

By direct tensile test of basalt fiber concrete with different volume content(0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%), the tensile stress-strain curve of basalt fiber concrete was obtained. Combining with the experimental phenomenon, failure form, tensile strength, elastic modulus, fracture energy, crack width and characteristic length, the relationship between the performance parameters of the basalt fiber concrete under tension and the volume content of basalt fiber was obtained with the method of fitting regression to obtain. The toughness and crack resistance of basalt fiber reinforced concrete were studied based on the concept of characteristic length proposed by Hillerborg. The results show that the addition of basalt fibers can improve the tensile strength of concrete and improve the toughness and crack resistance of concrete.