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Effect of drying at an early age on the moisture distributions in concrete specimens used for air permeability test

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Author

Summary, in English

The concrete discs with water-cement ratios 0.4 and 0.7 were preconditioned at their early age by drying at 50`C for 2 to 4 days, followed by storage in a Laboratory atmosphere till an age of 28 or S6 days. The moisture distributions in the specimens were determined by measuring relative humidity and capillary saturation degree, and the air permeability was determined according to the Cembureau method. The results show that drying at an early age, although it reduced the total moisture content, eventually increased the moisture gradients which might introduce new cracks in the specimens. The relationships between relative humidity and capillary saturation degree at different depths are used to indicate the heterogeneity originating from the preconditioning.

Publishing year

1993

Language

English

Pages

88-97

Publication/Series

Nordic Concrete Research

Document type

Journal article

Publisher

Norsk Betongforening

Topic

  • Materials Engineering

Keywords

  • capillary suction
  • drying
  • moisture distribution
  • moisture
  • concrete
  • permeability.

Status

Published

ISBN/ISSN/Other

  • ISSN: 0800-6377
  • 1993/2