聚乙烯醇纤维掺量对高延性地聚合物混凝土早期抗裂和收缩性能影响  

Effects of polyvinyl alcohol fiber content on early crack resistance and shrinkage properties of high ductility geopolymer concrete

作　　者：李杉[1] 周郑州 卢亦焱[1] 王喆 安俊澎 LI Shan;ZHOU Zhengzhou;LU Yiyan;WANG Zhe;AN Junpeng(School of Civil Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《大连理工大学学报》2024年第1期74-81,共8页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(52078391)。

摘　　要：研究了聚乙烯醇(PVA)纤维掺量对高延性地聚合物混凝土早期塑性收缩开裂、干燥收缩和自生收缩的影响.结果表明,与地聚合物混凝土相比,掺PVA纤维的高延性地聚合物混凝土抗开裂性能和抗收缩性能显著提高,PVA纤维体积掺量为2%的地聚合物混凝土抗开裂和抗收缩性能最好.基于试验结果,建立了收缩预测模型,该模型能够一定程度反映地聚合物混凝土早期收缩特征.The effects of polyvinyl alcohol(PVA)fiber content on the early plastic shrinkage cracking,dry shrinkage and autogenous shrinkage properties of high ductility geopolymer concrete are studied.The results show that the cracking and shrinkage resistance properties of high ductility geopolymer concrete with PVA fibers are significantly improved than those without fibers,and the geopolymer concrete with 2%of PVA fiber volume content has the best cracking and shrinkage resistance performance.Based on the test results,a shrinkage prediction model is established,which can reflect the early shrinkage characteristics of geopolymer concrete to a certain extent.

关 键 词：地聚合物混凝土 高延性 塑性收缩开裂 干燥收缩 自生收缩 收缩预测模型 

分 类 号：TU528[建筑科学—建筑技术科学]