河南城建学院学报2025，Vol.34Issue(2)：20-26,7.DOI:10.14140/j.cnki.hncjxb.2025.02.003
盐冻耦合作用下PVA纤维混凝土耐久性试验研究
Durability of PVA fiber concrete under salt freezing coupling
摘要
Abstract
To explore the durability of PVA fiber concrete in high cold and high salt area in northern China,freeze-thaw cycle test was carried out for concrete with different PVA fiber volume content(0,0.1％,0.3％and 0.5％)in sodium sulfate solution with a mass fraction of 5％.The apparent morphology,mass,ultrasonic velocity,compressive strength and splitting tensile strength of the specimen were studied with the times of salt freezing circulation,and the effect of PVA fiber with different volume content on the mechanical properties of concrete was analyzed.The results show that adding PVA fiber to concrete can improve the salt-freezing resist-ance of concrete,and the optimal volume content of PVA fiber is 0.3％,at which the mass loss rate of concrete is 0.23％and the relative dynamic elastic modulus is 0.962 at 150 times of salt-freezing.With the increase of the number of salt-freezing cycles,the compressive strength of concrete first increases and then decreases,while the splitting tensile strength decreases and the decreasing rate increases gradually.When the number of salt-freezing cycles is the same,the PVA fiber with 0.3％volume content has the best effect on improving the me-chanical properties of concrete.关键词
PVA纤维混凝土/硫酸盐侵蚀/冻融循环/耐久性/力学性能Key words
PVA fiber concrete/sulfate erosion/freeze-thaw cycle/durability/mechanical properties分类
建筑与水利引用本文复制引用
吕晨洁,武海荣,马先伟,张锋剑..盐冻耦合作用下PVA纤维混凝土耐久性试验研究[J].河南城建学院学报,2025,34(2):20-26,7.基金项目
河南省自然科学基金(232300420107) （232300420107）
河南省住房城乡建设科技计划项目(K-2320) （K-2320）
