合成纤维的耐碱性能及其对水泥基灌浆料性能的影响研究  

Study on alkali resistance of synthetic fibers and their influence on performance of cement-based grouting materials

作　　者：王天琪 范志勇 夏如茜 郑青 秦琼 WANG Tianqi;FAN Zhiyong;XIA Ruxi;ZHENG Qing;QIN Qiong(Suzhou Concrete Cement Products Research Institute Testing Center Co.,Ltd.,Suzhou 215000,China;Suzhou Concrete and Cement Products Research Institute Co.,Ltd.,Suzhou 215004,China)

机构地区：[1]苏州混凝土水泥制品研究院检测中心有限公司,江苏苏州215000 [2]苏州混凝土水泥制品研究院有限公司,江苏苏州215004

出　　处：《混凝土与水泥制品》2024年第8期62-66,共5页China Concrete and Cement Products

摘　　要：研究了碱溶液的pH值和浸泡龄期对聚丙烯纤维(PP纤维)、聚丙烯腈纤维(PAN纤维)和聚乙烯醇纤维(PVA纤维)耐碱性能的影响,分析了纤维掺量(0~2.5%)对水泥基灌浆料力学性能和自干燥收缩性能的影响。结果表明:经碱溶液浸泡后,PP、PAN和PVA纤维均发生了不同程度的腐蚀,其中,PP纤维的耐碱性能最好,PAN纤维次之,PVA纤维最差;随着纤维掺量的增加,掺PP、PAN和PVA纤维试件的抗压强度均呈先增大后减小的趋势,抗折强度均逐渐增大;掺入适量纤维有效降低了试件的收缩率,其中,PP纤维对试件自干燥收缩的抑制作用相对最佳。The effects of pH value and soaking age of alkaline solution on the alkali resistance of polypropylene fiber(PP fiber),polyacrylonitrile fiber(PAN fiber),and polyvinyl alcohol fiber(PVA fiber)were studied,and the influence of fiber content(0~2.5%)on the mechanical properties and self drying shrinkage performance of cement-based grouting materials was analyzed.The results show that after soaking in alkaline solution,PP fiber,PAN fiber,and PVA fiber all undergo varying degrees of corrosion.Among them,PP fiber has the best alkali resistance,followed by PAN fiber,and PVA fiber has the worst alkali resistance.With the increase of fiber content,the compressive strength of specimens mixed with PP fiber,PAN fiber,and PVA fiber shows a trend of first increasing and then decreasing,and the flexural strength gradually increases.The addition of an appropriate content of fiber can effectively reduce the shrinkage rate of the specimen,among which,PP fiber has the best inhibitory effect on the self drying shrinkage of the specimen.

关 键 词：合成纤维 耐碱性能 水泥基灌浆料 力学性能 自干燥收缩性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]