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Hypothesis on the mechanism of 'salt-frost scaling' of porous, brittle building materials

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Author

  • Sture Lindmark

Editor

  • Sven Knutsson

Summary, in English

A hypothesis on the mechanism of ''salt-scaling'' of porous building materials is described. The hypothesis is based on theories on frost heaving in soils and observations made on micro ice-lens growth in cement paste specimens. The main principle is that ice crystals close to the surface are able to feed from the remaining liquid phase of the outer salt solution after freezing has begun. Though the text mainly deals with cement based materials, the mechanism described should be valid for any brittle, porous material. A simplified calculation in the form of a traditional calculation of depth of ice-lens growth shows that the hypothesis predicts reasonable values. The correct calculation is only briefly described. Results from a first pre-series test on water absorption during freezing support the hypothesis.

Publishing year

1997

Language

English

Pages

113-120

Publication/Series

[Host publication title missing]

Document type

Conference paper

Publisher

Balkema

Topic

  • Materials Engineering

Keywords

  • Frost
  • salt
  • concrete
  • porous
  • mechanism
  • cement
  • durability

Conference name

International Symposium on Ground Freezing and Frost Action in Soils

Conference date

1997-04-15

Conference place

Luleå, Sweden

Status

Published

ISBN/ISSN/Other

  • ISBN: 90-5410-872-X