Effect of Temperature and Relative Humidity on Concrete Creep and Shrinkage

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Title: Effect of Temperature and Relative Humidity on Concrete Creep and Shrinkage

Author(s): K. Sakata and T. Ayano

Publication: Special Publication

Volume: 179

Issue:

Appears on pages(s): 1043-1058

Keywords: casting; creep; shrinkage; temperature

Date: 6/1/1998

Abstract:
Concrete creep and shrinkage strain obtained in constant temperature and constant humidity room are different from those observedinthe actual condition. Most of creep and shrinkage strain prediction equations predict the creep coefficient and shrinkage strain under the constant temperature and constant relative humidity. The effects oftemperaturehistory andrelativehumiditychange of atmosphere are not consideredinthese equations. In this study, the effect of the change of atmosphere condition on creep and shrinkage strain is discussed. It is shown that the concrete creep and shrinkage strain in actual ambient are influenced by casting season of concrete. Creep and shrinkage strain of concrete cast in winter aremuchbigger than those in summer. The significance to consider the effect of environmental change on concrete creep and shrinkage strain is emphasized in this paper.