王 启1,2,赵俭斌1,董 浩1,张延年1
王启,赵俭斌,董,浩,等.玄武岩纤维混凝土弯曲破坏特征与韧性分析[J].混凝土与水泥制品,2021(10):48-51.
WANG Q,ZHAO J B,DONG H,et al.Analysis of Bending Failure Characteristics and Toughness of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2021(10):48-51.
玄武岩纤维混凝土弯曲破坏特征与韧性分析
王 启1,2,赵俭斌1,董 浩1,张延年1
王启,赵俭斌,董,浩,等.玄武岩纤维混凝土弯曲破坏特征与韧性分析[J].混凝土与水泥制品,2021(10):48-51.
WANG Q,ZHAO J B,DONG H,et al.Analysis of Bending Failure Characteristics and Toughness of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2021(10):48-51.
摘 要:通过三分点加载试验,研究了玄武岩纤维体积掺量(0、0.25%、0.50%、0.75%、1.00%、1.25%)和长度(6 mm、12 mm)对混凝土弯曲性能的影响。结果表明:长度为12 mm的玄武岩纤维对混凝土抗弯强度的改善效果较好;随着玄武岩纤维掺量的增加,试件的抗弯强度先增后减,且玄武岩纤维的最优掺量为1.00%;玄武岩纤维虽可改善混凝土的等效初始弯曲强度,但对初始弯曲韧度比影响较小,即对峰值荷载前的弯曲韧性改善效果较小。
Abstract: Through three-point loading test, the effect of basalt fiber volume content(0、0.25%、0.50%、0.75%、1.00%、1.25%) and basalt fiber length(6 mm、12 mm) on the flexural properties of concrete was studied. The results show that basalt fiber with the length of 12 mm is more beneficial to bending strength. With the increase of basalt fiber content, the bending strength of concrete first increases and then decreases, and the optimal basalt fiber content is 1.00%. Although basalt fiber can improve the equivalent initial bending strength of concrete, it has little effect on the initial bending toughness ratio, which means there is no obvious improvement of bending toughness before peak load.
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