摘要
为定量研究典型湿度环境条件下补偿收缩混凝土的抗裂性,制备了3种补偿收缩混凝土,膨胀剂掺量分别为5.7%,7.4%,9.0%;测试了空气养护、绝湿养护、水中养护等3种湿度环境下混凝土的变形性能;计算了3种湿度环境下混凝土的抗裂指数。结果表明:湿度差异对膨胀剂的补偿收缩性能影响显著,基于实际湿度环境对补偿收缩混凝土进行差别化设计是当前研究的方向。
To quantitatively study crack resistance of shrinkage-compensating concrete in typical humidity environments,three kinds of shrinkage-compensating concretes were designed,of which expansive agent content were 5.7%,7.4%,9.0%respectively.The deformation properties of concretes were measured in such three humidity environments including air curing,sealed curing and water curing.The crack resistance indexes of concretes in these three humidity environments were calculated.The results indicate that the differences of shrinkage-compensating properties of expansive agent in different humidity environments are significant.What is the proper direction for our current endeavors is that the differential designs of mix compositions of shrinkage-compensating concretes should be done based on actual humidity environments.
作者
宁逢伟
李海涛
陈波
白银
王子龙
张丰
NING Feng-wei;LI Hai-tao;CHEN Bo;BAI Yin;WANG Zi-long;ZHANG Feng(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,210029,Nanjing,China;Xinjiang Irtysh River Basin Development&Construction Administrative Bureau,830000,Urumqi,China)
出处
《建筑技术》
2020年第1期21-24,共4页
Architecture Technology
基金
国家重点研发计划项目(2016YFC0401610)
国家自然科学基金项目(51739008).
关键词
混凝土
湿度
抗裂性
膨胀剂
水利工程
concrete
humidity
crack resistance
expansive agent
hydraulic engineering
