摘要
通过10组不同配合比的聚乙烯醇纤维增强水泥基复合材料(PVA-FRCC)试件的收缩试验,研究了纤维体积分数、水胶比、砂胶比及不同养护环境下PVA-FRCC试件的收缩性能.结果表明:PVA纤维的掺入减小了基材的收缩,但效果有限;PVA-FRCC试件的收缩随水胶比的减小、砂胶比的增大及周围介质相对湿度的升高而减小.另外,根据试验结果并结合现有混凝土材料收缩计算模型,提出了PVA-FRCC收缩估算模型,比较后发现,估算模型的计算值与试验值具有较高的吻合度.
Based on the shrinkage tests of 10groups of PVA-FRCC(polyvinyl alcohol-fiber reinforced cementitious composite)specimens with different mixture proportion,the shrinkage behaviors of PVA-FRCC materials under different fiber volume fraction,water-binder ratio,sand-binder ratio and curing environment were studied.The results show that the shrinkage of PVA-FRCC is reduced by adding PVA fibers,but the effect is limited.The shrinkage of substrate decreases with the decrease of water-binder ratio,the increase of sand-binder ratio and the increase of ambient humidity.Combining the existing concrete shrinkage estimation models and the test results,a model for shrinkage estimation of PVA-FRCC is proposed,the calculation values with the model formulas are in good agreement with the test values.
作者
王玉清
刘潇
刘曙光
WANG Yuqing;LIU Xiao;LIU Shuguang(School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;School of Mining and Technology, Inner Mongolia University of Technology, Hohhot 010051, China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2020年第6期1289-1296,共8页
Journal of Building Materials
基金
国家自然科学基金资助项目(51968056,51768051)
内蒙古自治区科技创新引导奖励资金项目(KCBJ2018016)
内蒙古自治区科技成果转化专项资金项目(2019CG072)。
关键词
聚乙烯醇纤维水泥基复合材料
收缩
影响因素
估算模型
polyvinyl alcohol-fiber reinforced cementitious composite(PVA-FRCC)
shrinkage
influence factor
estimation model
