硅酸盐通报2025，Vol.44Issue(2)：463-473,500,12.DOI:10.16552/j.cnki.issn1001-1625.2024.1020
混杂PE/PVA纤维EGC与混凝土的界面粘结性能试验研究
Experimental Study on Interfacial Bonding Performance Between Engineered Geopolymer Composites with Hybrid PE/PVA Fiber and Concrete
摘要
Abstract
Engineered geopolymer composites(EGC)exhibit excellent tensile ductility and crack control capabilities,making it promising materials for concrete structure repair.However,EGC high cost and the lack of understanding regarding the bonding mechanisms between EGC and concrete have limited EGC widespread application.By using polyethylene(PE)fiber and domestically produced polyvinyl alcohol(PVA)fiber,hybrid PE/PVA fiber EGC(PE/PVA-EGC)were prepared and the bonding performance at EGC-concrete interface was investigated.Slant shear tests were conducted to explore the effect mechanisms of varying PE fiber content,hybrid PE/PVA fiber ratio,and precursor ratio on the interfacial bonding performance.Results indicate that increasing PE fiber content,PVA fiber replacement ratio,ground granulated blast furnace slag content and concrete strength can improve the interfacial shear bonding strength.Increasing the PE fiber content from 1.0％(volume fraction)to 2.0％improves the interfacial shear bonding strength of specimens by 13.24％.The interfacial shear bonding strength increases with higher replacement ratio of PVA fiber and the strength of matrix.The best bonding performance is observed when the existing concrete strength grade is C50.In conclusion,with an appropriate matrix strength,hybrid PE/PVA fiber can effectively enhance the interfacial bonding performance between EGC and existing concrete while controlling repair or reinforcement costs.关键词
工程地聚物基复合材料/PE纤维/PVA纤维/界面粘结性能/斜剪试验Key words
engineered geopolymer composite/PE fiber/PVA fiber/interfacial bonding performance/slant shear test分类
建筑与水利引用本文复制引用
褚丽晶,卓柯先,杨泽铭,李潮森,刘润安,林嘉祥..混杂PE/PVA纤维EGC与混凝土的界面粘结性能试验研究[J].硅酸盐通报,2025,44(2):463-473,500,12.基金项目
广东省城市感知与监测预警企业重点实验室基金项目(2020B121202019) （2020B121202019）
国家自然科学基金(12002090) （12002090）
