大掺量矿物掺合料混凝土的干燥收缩与数学模型  

Drying Shrinkage of High Volume Mineral Admixture Concrete and Mathematical Model

作　　者：白康[1] 余红发[1] 郝娟[1] 曹文涛[1] 周鹏[1] 韩丽娟[1] 

机构地区：[1]南京航空航天大学土木工程系,江苏南京210016

出　　处：《华中科技大学学报（城市科学版）》2008年第2期39-41,68,共4页Journal of Huazhong University of Science and Technology

基　　金：国家自然科学基金(50178044);江苏省自然科学基金前期预研项目(BK2005216)

摘　　要：本文研究了矿物掺合料和膨胀剂对混凝土干燥收缩的影响。结果表明,在低水胶比等量取代55%水泥的情况下,单掺矿渣时混凝土的干燥收缩值最小,双掺矿渣和粉煤灰时混凝土干燥收缩值略有增加,复合掺加硅灰时将显著增大混凝土的干燥收缩,复合掺加膨胀剂有利于降低干燥收缩值。此外,建立了大掺量矿物掺合料混凝土干燥收缩的复合指数函数模型,该模型与实测值非常吻合。This paper studied the influence of mineral admixtures and expansive agents on drying shrinkage of concrete. The results show that, under the condition of low water-binder ratio and equal replacement of 55% cement, the drying shrinkage of single-added slag concrete is minimum and that of double-added slag and fly ash concrete has a little increasing; when silica fume is added compositely, the drying shrinkage of concrete increases obviously; expansion agent that is added compositely is helpful to reduce the drying shrinkage of concrete; besides, composite index function model of high volume mineral admixture concrete is built and the measured value accords with the model well.

关 键 词：混凝土 矿物掺合料 干燥收缩 数学模型 

分 类 号：TU528[建筑科学—建筑技术科学] TU502.6