Relative humidity and deterioration of concrete under freeze-thaw load

被引：43
|
作者：
Wang, Zhendi [1 ]
Zeng, Qiang [2 ]
Wu, Yuekai [3 ]
Wang, Ling [1 ]
Yao, Yan [1 ]
Li, Kefei [2 ]
机构：
[1] China Bldg Mat Acad, State Key Lab Green Bldg Mat, Beijing 100024, Peoples R China
[2] Tsinghua Univ, Inst Bldg Mat, Dept Civil Engn, Beijing 100084, PR, Peoples R China
[3] Beijing Univ Civil Engn & Architecture, Beijing 100044, PR, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 62卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Relative humidity; Deterioration; Concrete; Freeze-thaw; INTERNAL FROST DAMAGE; POROUS MATERIALS; CEMENT; BEHAVIOR; PHASE; HYSTERESIS; SURFACE; MODEL; WATER; PASTE;
D O I：
10.1016/j.conbuildmat.2014.03.027
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Evolution of internal relative humidity (RH) and deterioration of concrete under cyclic freeze-thaw (F-T) load were studied. RH values of concrete specimens were monitored upon freezing and thawing. Compressive strength, mass loss, visual ratings and porosimetry were used to evaluate changes in concrete. Decreasing water to cement ratio (w/c) decreased the steady-state internal RH. RH-temperature curves showed that freezing temperature was independent of F-T cycles, while thawing temperature varied with F-T cycle and w/c. More severe deterioration, but less alteration of pore structure, occurred in higher w/c concrete - increasing w/c increased ice formation in pores, and thus effective crystallization pressure and liquid pressure. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：18 / 27
页数：10
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