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This article in SSSAJ

  1. Vol. 54 No. 5, p. 1500-1502
     
    Received: Nov 6, 1989
    Published: Sept, 1990


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doi:10.2136/sssaj1990.03615995005400050048x

Shrinkage Geometry of a Heavy Clay Soil at Various Stresses

  1. J. J. B. Bronswijk 
  1. The Winand Staring Centre for Integrated Land, Soil and Water Research, P.O. Box 125, 6700 AC Wageningen, the Netherlands

Abstract

Abstract

The shrinkage geometry of a clay soil drying from saturation to oven dryness was investigated. Undisturbed samples in rings measuring 232 cm3 were taken in the field at depths of 0.0, 0.20, 0.40 and 0.60 m. Overburden pressures at these four depths were determined by wet bulk-density determination. Samples were oven dried with various loads applied on top. Surface subsidence and total volume decrease after drying were measured. It appeared that, for each soil layer, shrinkage at overburden pressures equal to or larger than field pressures was isotropic. When the load was removed during drying, subsoil samples showed relatively large cracking in comparison with surface subsidence.

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