CAJ | 학술논문

采用湿-烘循环的试验方法，以PVA纤维体积掺量和烘干温度为参数，研究了PVA纤维增强水泥基复合材料（PVA- FRCC）的抗氯离子侵蚀性能。结果表明：湿-烘循环作用下，随着PVA纤维体积掺量逐渐增加，PVA-FRCC试件氯离子平均侵蚀深度变化幅度较小，而氯离子最大侵蚀深度逐渐降低。与同等条件下混凝土相比，氯离子最大侵蚀深度约降低20.9%~48.9%，同时，同一侵蚀深度处自由氯离子浓度明显降低。随着烘干温度的升高，PVA-FRCC试件氯离子平均和最大侵蚀深度增长明显；相同侵蚀深度处自由氯离子浓度明显增加。 PVA纤维体积掺量和烘干温度对PVA- FRCC抗氯离子侵蚀性能有较明显的影响。
채용습-홍순배적시험방법，이PVA섬유체적참량화홍간온도위삼수，연구료PVA섬유증강수니기복합재료（PVA- FRCC）적항록리자침식성능。결과표명：습-홍순배작용하，수착PVA섬유체적참량축점증가，PVA-FRCC시건록리자평균침식심도변화폭도교소，이록리자최대침식심도축점강저。여동등조건하혼응토상비，록리자최대침식심도약강저20.9%~48.9%，동시，동일침식심도처자유록리자농도명현강저。수착홍간온도적승고，PVA-FRCC시건록리자평균화최대침식심도증장명현；상동침식심도처자유록리자농도명현증가。 PVA섬유체적참량화홍간온도대PVA- FRCC항록리자침식성능유교명현적영향。
Chloride erosion resistance of polyvinyl alcohol fiber reinforced cementitious composites (PVA-FRCC)is studied by wet-dry cycles and setting PVA volume fraction and dry temperature as evaluation index. The results show that, with the increasing dosage of PVA fiber, the average erosion depth range shows little change under wet-dry cycles , but the maximum erosion depth decreases slowly. Compared with concrete in the same condition, the maximum chloride erosion depth decrease by 20.9% to 48.9%, meanwhile, concentration of free chloride ion in the same depth becomes lower. With the dry temperature increasing, the average erosion depth and maximum erosion depth of PVA-FRCC increase significantly, that is similar with concentration of free chloride ion in the same depth. PVA fiber content and dry temperature have great influence on chloride resisting properties of PVA-FRCC.