摘要
建立了混凝土内水分影响深度的平衡时间比模型,研究了混凝土水灰比、初始饱和度及混凝土表面的环境饱和度对模拟环境中混凝土平衡时间比的影响,通过数值计算探讨了混凝土水灰比、初始饱和度及混凝土表面的环境饱和度与混凝土内水分影响深度间的关系,并构筑出水分影响深度模型,最后分析了不同混凝土平衡时间比求解方法之间的异同.结果表明:不同求解方法所得混凝土平衡时间比一致,所求得的平衡时间比与实测值基本吻合;混凝土平衡时间比与混凝土水灰比、初始饱和度及混凝土表面的环境饱和度存在良好的指数函数关系;混凝土内水分的影响深度与润湿时间的平方根间成线性关系.
In this paper,first,an equilibration time ratio model of water influence depth in concrete is established, and the equilibration time ratio in simulated environment,which is influenced by three parameters,namely,the water-to-cement ratio,the initial concrete saturation,and the environment saturation around concrete surface,is in-vestigated.Then,the relationships between the three parameters and the water influence depth in concrete are ana-lyzed via numerical calculation,and a model describing the water influence depth is constructed.Finally,the differences and similarities of the solving methods for equilibration time ratio are discussed.The results show that (1 )different solving methods help to obtain the same equilibrium time ratio that basically accords with the test re-sults;(2)there exists an obvious exponential relationship between the equilibration time ratio and such parameters as the water-to-cement ratio,the initial concrete saturation and the environment saturation around concrete surface;and (3)the water influence depth in concrete is linear to the square root of wetting time.
出处
《华南理工大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2014年第2期64-73,共10页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51278496
51378506)
长江学者和创新团队发展计划资助项目(IRT1296)
教育部博士研究生学术新人奖项目(094801016)
关键词
模拟干湿环境
混凝土
水分影响深度
平衡时间比
simulated drying-wetting environment
concrete
water influence depth
equilibration time ratio