Abstract
Consolidated, drained direct shear tests were conducted on natural and remolded samples of a subangular blocky structured B3 horizon of Menfro soil (Typic Hapludalf). Differences in Mohr-Coulomb failure envelopes resulted from differences in the macrostructural features. The cohesion of the naturally structured soil under saturated conditions was 4 g/cm2, whereas that of the remolded soil was 155 g/cm2. Friction angles were dependent upon the vertical stress. As compared with the remolded soil, volume change for the natural soil was greater during consolidation and was less during shear. The natural soil maintained a higher degree of brittleness at increasing vertical stresses.
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