摘要
采用U型管微压测定装置,研究了不同类型、不同预湿程度和不同掺量的陶粒在总水灰比相同,1 d龄期混凝土中的吸水返水变化规律.研究结果表明,陶粒吸水返水过程与陶粒类型、预湿程度密切相关,受陶粒掺量的影响很小;当陶粒类型相同时,预湿程度越高,陶粒在混凝土中的吸水能力越弱;当预湿程度相同时,对于无预湿陶粒,吸水率大的陶粒吸水能力较强;对于有预湿陶粒(1 h或24 h),吸水率大的陶粒吸水能力较弱.
Using a U-shaped tube test device,the water absorption and desorption characteristic of ceramsite with different type,pre-wetting degree and ceramsite content in concrete with the same total water to cement ratio was investigated.The study resuh shows that the water absorption and desorption property of ceramsite in concrete is closely related to the ceramsite type and pre-wetting degree,while the influence of ceramsite content can be ignored.When the type of ceramsite is the same,with the increasing of the prewetting degree of ceramsite,the water-absorbing ability of ceramsite decreases.When the pre-wetting degree is the same,for non-prewetting ceramsite,the ceramsite with higher water absorption capacity has stronger water-absorbing; and for prewetting ceramsite （1 h or 24 h）,the ceramsite with higher water absorption capacity has weaker water-absorbing.
出处
《福州大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第5期759-764,共6页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51078090)
国家级大学生创新创业训练计划资助项目(201210386016)
关键词
陶粒
早期
吸水返水特性
混凝土
U型管
ceramsite
early ages
water absorption and desorption property
concrete
U-shaped tube
