The discussers describe work similar to that discussed in the paper, either using the same kind of test (using Proctor specimens 12 cm long) and recording the deformations of the whole horizontal diameter at the center of the cylinder, or with a new device designed to study the strain in tension that induces cracking in clay compacted beams by bending them on circular platforms of several radii. The different samples are made so that the influence of dry density and water content on the tensile performance can be studied separately. The load and displacements are considered only up to the moment the first crack appears. Then, assuming that the behavior of the soil has been elastic, the local strain and strength at the central part are deduced. An explanation is offered for the increase in strength observed in the slowest test. In a second discussion, the procedure to plot the measured strain against the calculated tensile stress is questioned, and the comment is made that the steep increase in tensile failure strains with moisture content observed by the authors may be due in part to the increasing value of Poisson's ratio as the degree of saturation increases. The assumption that the tensile stress can be obtained from elastic theory also may be in considerable error for soils where tensile stress-strain curves deviate markedly from a straight line.

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  • Accession Number: 00098648
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11339 Proceeding
  • Files: TRIS
  • Created Date: Sep 10 1975 12:00AM