Using a loading device nominal stresses are derived and from dial gauge readings diametral strains are determined for each rolling traverse of the soil thread. A thread of soil is rolled between two plates configured to permit extrusion and reduction of diameter with much less operator interference than with the standard test and judgement of the crumbling condition is eliminated.
An apparatus that replicates Atterberg's rolling technique, devised and developed by the author, is described, referred to as the Barnes Apparatus. The strength-based concept and use of the fall-cone test to determine the plastic limit are shown to be flawed. Alternative methods for the plastic limit are shown to be imprecise and unreliable.
AbstractPrevious thread rolling methods for the plastic limit are shown to be inadequate and inaccurate.
