Research Article
Nov 1976
Migration of Subgrade Salts Damages Thin Pavements
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VIEW THE REPLYPublication: Transportation Engineering Journal of ASCE
Volume 102, Issue 4
Abstract
In moisture deficient areas, soluble salts contained in road aggregates may be leached to the surface by evaporation gradients. The growth of salt crystals beneath the surfacing layer of a pavement may cause damage by blistering and cracking the surface. Salt damage can be prevented by selecting materials that contain less than 0.2% of soluble salts or else by controlling surfacing permeability so that the ratio of permeability to layer thickness is less than 30 microsecond. Salt damaged pavements may be repaired by overlaying to render the surfacing impervious. A conductivity method is suggested as a means of detecting excessive percentages of soluble salts in road-making materials, and a method of measuring surfacing permeability in situ is described.
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Published In
Transportation Engineering Journal of ASCE
Volume 102 • Issue 4 • November 1976
Pages: 779 - 791
Copyright
© 1976 American Society of Civil Engineers.
History
Published in print: Nov 1976
Published online: Feb 5, 2021
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Authors
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Geoffrey E. Blight, M.ASCE
Prof. of Construction Materials, Univ. of Witwatersrand, Johannesburg, South Africa
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.