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PHYSICOCHEMICAL AND MECHANICAL PROPERTIES OF SALINE SOILS DURING TEMPERATURE CHANGE.

Author(s) : CHEN X. B.

Type of article: Article

Summary

A SERIES OF IMPORTANT CHANGES IN PHYSICOCHEMICAL AND PHYSICOME CHANICAL PROPERTIES OF SALINE SOILS OCCURS DURING COOLING: THE PARTS OF SOLUTE MIGRATE TOWARDS THE COLDER END OF THE SOIL COLUMN AND THE PARTS OF THE SODIUM SULPHATE RECRYSTALLIZE FROM THE SOIL SOLUTION, CAUSING THE SOIL TO EXPAND IN VOLUME, OR WHAT IS CALLED SALT HEAVE, WHICH MAKES THE SOIL DECREASE IN COMPRESSIVE STRENGTH. THE SALT HEAVE RATIO OF SOILS DECREASES WITH THE INCREASE IN THE COOLING RATE, SURCHARGE, INITIAL DENSITY AND THE COHESION BETWEEN SOIL PARTICLES, BUT INCREASES WITH AN INCREASE IN WATER CONTENT. THE FACT THAT SOIL VOLUME DOES NOT SHRINK APPARENTLY DURING REWARMING SHOWS THE NONREVERSIBILITY OF THE SALT HEAVE PROCESS. DURING THE REPEATED CYCLES OF COOLING AND WARMING, THE SALT HEAVE ACCUMULATES AND THE COMPRESSIVE STRENGTH OF SOIL DIMINISHES GRADUALLY.

Details

  • Original title: PHYSICOCHEMICAL AND MECHANICAL PROPERTIES OF SALINE SOILS DURING TEMPERATURE CHANGE.
  • Record ID : 1989-2511
  • Languages: English
  • Source: Sci. China, A - vol. 32 - n. 2
  • Publication date: 1989
  • Document available for consultation in the library of the IIR headquarters only.

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