摘要
通过单轴抗压试验、直接拉伸试验、四点弯曲试验、抗折试验对不同配比和不同试件形状的PVA纤维增强水泥基复合材料进行力学性能试验研究,结果表明:加有PVA纤维的水泥基复合材料的抗压强度提高不大,大约是10%,而抗拉强度和抗弯强度则提高很多,且出现了许多细小裂缝,呈现出应变硬化特性,极限拉应变可达1.8%;利用直板型试件做直接拉伸试验比胫型试件做直接拉伸试验的试验结果准确,且易于试验操作.试验结果证实了PVA纤维增强水泥基复合材料具有很好的韧性.
The mechanical properties of PVA fibre reinforced cement composite with different material composition ratios and different shapes were tested in this paper through uniaxial compression test,direct tensile test and four-point bending test.Experimental results showed that the compression strength with PVA fibers increased about 10%,while the tensile strength and flexural strength are greatly improved,and there were many small cracks,showing strain hardening characteristics,the ultimate tensile strain reached 1.8%.Furthermore,The experimental results of straight-type specimen are more accurate and easy to perform compared to the shin plate specimen.Experimental results confirmed that PVA fiber reinforced cementitious composites have good toughness.
出处
《湖北工业大学学报》
2011年第2期108-112,共5页
Journal of Hubei University of Technology
关键词
PVA纤维
水泥基复合材料
力学特性
韧性
PVA fibrous
cementitious composite
mechanical properties
toughness
