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

In English

Författare

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.

Publiceringsår

1993

Språk

Engelska

Sidor

88-97

Publikation/Tidskrift/Serie

Nordic Concrete Research

Dokumenttyp

Artikel i tidskrift

Förlag

Norsk Betongforening

Ämne

  • Materials Engineering

Nyckelord

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

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0800-6377
  • 1993/2