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Test Method Title
Standard Test Method for Torsional Ring Shear Test to Determine Drained Fully Softened Shear Strength and Nonlinear Strength Envelope of Cohesive Soils (Using Normally Consolidated Specimen) for Slopes with No Preexisting Shear Surfaces
fully softened shear strength
Description of Test
This test method consists of placing the reconstituted specimen (slurry or paste) in the annular specimen container, applying a predetermined normal stress through the top loading platen, providing for wetting and draining of the specimen (optional); consolidating the specimen under the normal stress; applying a constant rate of shear deformation; and measuring the shearing force and displacement until a maximum shear resistance is reached.
Preferred Test Sample Size
Bulk samples: 1000 grams; undisturbed samples: 2.87" diameter x 3" of Shelby tube
Number of Test Specimens
Test Specimen Size
annular specimen; inside diameter ~2", outside diameter ~3.25"
consolidated; drained test conditions; fully softened shear strength; reconstituted specimens; ring-shear test; strength envelope
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