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Soil Science Society of America Journal Abstract -

Rupture Parameters of Soil Aggregates1


This article in SSSAJ

  1. Vol. 32 No. 5, p. 720-724
    Received: Feb 2, 1968
    Accepted: Apr 22, 1968

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  1. A. S. Rogowski,
  2. W. C. Moldenhauer and
  3. Don Kirkham2



Rupture stress values of air-dry aggregates of various sizes taken from nine surface soils containing from 7 to 53% clay are given as load in dynes per unit area. Corresponding rupture strain values are given as change in polar diameter at rupture per unit length of polar diameter. The rupture modulus defined as the stress/strain ratio is also listed. The values depend on the assumption that aggregates approximate spheres. Earlier work and visual observation show that this assumption is valid for 2- to 8-mm aggregates. Experimental stress-strain curves indicate that Hooke's law is valid up to rupture. Values of rupture stress, rupture strain and rupture modulus were found to be significantly correlated with percent clay, percent organic carbon, aggregate bulk density, aggregate size distribution and soil erodibility.

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