国产某PVA纤维对混凝土早期开裂和干燥收缩的影响  

Effects of a Domestic PVA Fiber on Early Crack and Drying Shrinkage of Concrete

作　　者：张云杰 ZHANG Yunjie(Inner Mongolia University of Technology,Hohhot,Inner Mongolia 010051,China)

机构地区：[1]内蒙古工业大学矿业学院,内蒙古呼和浩特010051

出　　处：《水利与建筑工程学报》2022年第4期98-103,共6页Journal of Water Resources and Architectural Engineering

摘　　要：目前,聚乙烯醇纤维混凝土(Polyvinyl Alcohol Fiber Concrete)主要使用进口PVA纤维,其高昂的成本限制了其工程应用,使用国产PVA纤维可以有效降低成本。以纤维掺量(0%、0.9%、1.2%、1.6%)及纤维长度(8mm、12mm)为参数,设计制作了6组PVA纤维混凝土平板法早期开裂试件及6组干燥收缩试件,研究了PVA纤维对混凝土早期抗裂性能和抗干燥收缩性能的影响。结果表明:PVA纤维混凝土早期抗裂性能高于普通混凝土,且在掺加纤维长度为8mm,掺量为1.6%时,纤维抗裂性能提升最大;抗干燥收缩性能高于普通混凝土,且存在最佳纤维掺量,使抗干燥收缩性能提升最大。Polyvinyl Alcohol Fiber Concrete’s engineering application is under influence of using imported PVA fiber and its high cost.Using domestic PVA fiber can decrease the cost effectively.In order to analyze the early cracking resistance and drying shrinkage property of the domestic PVA fiber concrete,6 groups of matrixes are designed for each test,and parameters are fiber contents(0%,0.9%,1.2%,1.6%)and fiber lengths(8 mm,12 mm).The results indicates that the early cracking resistance and drying shrinkage property of the domestic PVA fiber concrete are higher than normal concrete.When the length is 8mm and the content is 1.6%,the early cracking resistance reaches the maximum value;and the optimum content exists in the drying shrinkage test.

关 键 词：聚乙烯醇纤维混凝土(PAFC) 纤维掺量 早期开裂 干燥收缩 

分 类 号：TU528.572[建筑科学—建筑技术科学]