期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 62, 期 -, 页码 18-27出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2014.03.027
关键词
Relative humidity; Deterioration; Concrete; Freeze-thaw
资金
- National Natural Science Foundation of China [51320105016]
- China postdoctoral science foundation [2012M520288]
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.
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