不同条件下路面混凝土干缩变形性能差异研究
Study on the Difference of Dry Shrinkage Deformation Behavior of Pavement Concrete Under Different Conditions
曹汝福1
作者信息
- 1. 贵州遵义路桥工程有限公司,贵州 遵义 563000
- 折叠
摘要
文中主要就不同条件下路面混凝土的干缩变形性能差异展开试验研究,结果表明,养护条件、水灰比、龄期均会对混凝土干缩变形能力产生影响.混凝土水灰比增长,则干缩率提升;水灰比为固定值时,干缩率随养护龄期延长而不断增加,但养护龄期越长,干缩变形量提升幅度越小,其中,养护龄期为28、180 d时,混凝土干缩变形量分别达到养护540 d时的58%和91%.龄期固定条件下,混凝土水灰比越大,干缩率越大,路面混凝土养护初期进行适当湿养护能有效缓解干缩开裂状况.
Abstract
This paper mainly carried out experimental research on the difference of dry shrinkage deformation performance of pavement concrete under different conditions.The results show that curing conditions,water-cement ratio and age all affect the dry shrinkage deformation ability of concrete.When the water-cement ratio of condensate increases,the dry shrinkage rate increases;when the water-cement ratio is fixed,the dry shrinkage rate increases with the curing age,but the longer the curing age,the smaller the increase of dry shrinkage deformation.The dry shrinkage deformation of concrete at the curing age of 28 days and 180 days has reached 58%and 91%of the dry shrinkage deformation at the curing age of 540 days.Under fixed age conditions,the greater the water-cement ratio of concrete,the greater the dry shrinkage ratio.Appro-priate wet curing at the initial stage of pavement concrete curing can effectively alleviate the condition of dry shrinkage cracking.
关键词
水灰比/混凝土/干缩变形/养护龄期Key words
Water-cement ratio/Concrete/Dry shrinkage deformation/Curing age引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据