CAJ | 학술논문

通过聚乙烯醇纤维增强水泥基复合材料(polyvinyl alcohol fiber reinforced cementitious composite,PVA-FRCC)和普通混凝土在干湿交替条件下的氯盐侵蚀试验,研究了干湿循环次数、纤维体积掺量、温度梯度对PVA-FRCC氯离子侵蚀深度的影响,并从水泥基内部孔隙结构和微裂缝两个主要方面进行了机理分析。结果表明,随干湿循环次数的增加,PVA- FRCC与普通混凝土氯离子侵蚀深度均在增大,且PVA- FRCC氯离子侵蚀深度和侵蚀速度均比普通混凝土的低,随着纤维掺量从0~2%增加,PVA- FRCC氯离子侵蚀深度总体呈降低趋势；随着干循环温度以20℃、40℃、60℃的梯度升高,PVA- FRCC氯离子侵蚀深度增大,纤维掺量为2%的PVA- FRCC表现出较好的抗氯盐侵蚀能力。
통과취을희순섬유증강수니기복합재료(polyvinyl alcohol fiber reinforced cementitious composite,PVA-FRCC)화보통혼응토재간습교체조건하적록염침식시험,연구료간습순배차수、섬유체적참량、온도제도대PVA-FRCC록리자침식심도적영향,병종수니기내부공극결구화미렬봉량개주요방면진행료궤리분석。결과표명,수간습순배차수적증가,PVA- FRCC여보통혼응토록리자침식심도균재증대,차PVA- FRCC록리자침식심도화침식속도균비보통혼응토적저,수착섬유참량종0~2%증가,PVA- FRCC록리자침식심도총체정강저추세；수착간순배온도이20℃、40℃、60℃적제도승고,PVA- FRCC록리자침식심도증대,섬유참량위2%적PVA- FRCC표현출교호적항록염침식능력。
The corrosion resistance of polyvinyl alcohol fiber reinforced cementitious composite (PVA-FRCC) and con-crete in chloride environments is investigated via dry-wet test. The influence of dry-wet cycles, content of fiber and tem-perature gradient on the depth of chloride corrosion of PVA-FRCC is analyzed,and cement-based internal pore structure and micro crack are analyzed on mechanism. The results show that the chloride ions corrosion depth of PVA-FRCC and concrete increase with the increase of cycle number under double environment of dry-wet cycle, and chloride ion corrosion depth and corrosion rate of PVA-FRCC are lower than that of normal concrete. With the fiber content increasing from 0~2%, PVA-FRCC chloride ion corrosion depth becomes decreasing trend. With the dry circulating temperature gradient of 20℃, 40℃ to 60℃ elevating, chloride ion corrosion depth of PVA-FRCC increases, and PVA-FRCC with 2% PVA fiber shows better resistance to chloride corrosion.