Moisture diffusion of concrete considering self-desiccation at early ages

In concrete structures exposed to the ambient air at early ages, the moisture content in concrete decreases due to moisture diffusion. In addition, self-desiccation due to hydration of cement causes an additional decrease of moisture content in concrete at early ages, especially for high-strength concrete, In this study, the internal relative humidity in drying concrete specimens was measured at early ages. Furthermore, the variation of relative humidity due to self-desiccation in sealed specimen was measured. The moisture distribution in low-strength concrete with high water/cement ratio was mostly influenced by moisture diffusion due to drying rather than self-desiccation. In high-strength concrete with low water/cement ratio, however, self-desiccation had a considerable influence on moisture distribution. The results obtained from the moisture diffusion theory were in good agreement with experimental results. (C) 2000 Elsevier Science Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
1999-12
Language
ENG
Citation

CEMENT AND CONCRETE RESEARCH, v.29, no.12, pp.1921 - 1927

ISSN
0008-8846
DOI
10.1016/S0008-8846(99)00192-1
URI
http://hdl.handle.net/10203/7545
Appears in Collection
CE-Journal Papers(저널논문)
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