改性PVA纤维对ECC静力学特性及破坏形态的影响试验研究  

Experimental Research on the Effect of Modified PVA Fiber on ECC Static Properties and Failure Forms

作　　者：罗银剑 李秀地 杨谨鸿 陈雪[2] LUO Yin-jian;Li Xiu-di;YANG Jin-hong;CHEN Xue(Army Logistics Academy of PLA,Chongqing 401331,China;University of Electronic Science and Technology of China,ChengduSichuan 610054,China)

机构地区：[1]陆军勤务学院,重庆401331 [2]电子科技大学,四川成都610054

出　　处：《当代化工》2022年第2期290-296,共7页Contemporary Chemical Industry

基　　金：重庆市院士专项基金(项目编号:cstc2020yszx-jscxX0007)。

摘　　要：为研究表面改性聚乙烯醇(PVA)纤维对ECC静力学特性及破坏形态的影响,对不同纤维掺量的ECC进行了抗折强度、抗压强度及劈裂抗拉强度试验。结果表明:在标准条件下养护28天后,纤维的加入能显著改善水泥基复合材料的力学特性指标,试件的抗折强度、抗压强度及劈裂抗拉强度均与纤维掺量呈正相关,相较之下,纤维掺量对抗压强度的影响最小。改性PVA纤维能显著减轻水泥基复合材料的破坏程度,极大地改善水泥基复合材料的脆性,相较于基体材料,ECC具有较好的延展性和韧性,吸能效果较好。In order to study the effect of surface modified polyvinyl alcohol(PVA)fibers on the static properties and destructive morphology of ECC,fracture strength,compressive strength and split tensile strength were tested on ECC with different fiber incorporation.The results showed that after 28 days of maintenance under standard conditions,the addition of fiber significantly improved the mechanical characteristic index of cement-based composite materials.The fracture strength,compressive strength and split tensile strength of the test piece were positively correlated with the fiber mixture,which had the least impact on the compression strength.Modified PVA fiber significantly reduced the damage degree of cement composite and greatly improved the fragility of cement composite.Compared with matrix materials,ECC had good ductility and toughness and good energy absorption effect.

关 键 词：ECC 水泥基复合材料 力学特性 破坏形态 

分 类 号：TQ336[化学工程—橡胶工业]