摘要
通过四点弯曲试验研究了砂灰比对PVA增强水泥基复合材料弯曲韧性性能的影响。定义韧性指标为残余变形能与总变形能的比值。采用变形指标和能量吸收指标进行试验结果分析,结果表明这种材料具有较高的韧性和能量耗散能力,并且在研究的砂灰比范围内存在一个临界砂灰比,使变形指标和能量指标随砂灰比的变化在临界值处出现转折。
This paper studied the influence of sand - cement ratio on the toughness property of PVA reinforced cement composite materials by four - point bending experiment. Toughness index is defined as the ratio of residual deformation energy to total deformation energy. Experimental results are analyzed using deformation index and energy absorption index. The results show that this material has high toughness and energy absorption ability, and there is a critical value where the change direction of the deformation index and energy absorption index alter.
出处
《北方交通》
2014年第3期44-47,共4页
Northern Communications
关键词
PVA纤维
水泥基复合材料
砂灰比
弯曲变形
能量吸收
韧性
PVA fiber
Cement- based composite material
Sand- cement ratio
Flexible deformation
Energy absorbency
Toughness index
