Lab Services: Soil testing

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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

Reference Number

ASTM D7608

Material

Soil

Test Property

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

Number of Test Specimens

1

Test Specimen Size

annular specimen; inside diameter ~2", outside diameter ~3.25"

Keywords

consolidated; drained test conditions; fully softened shear strength; reconstituted specimens; ring-shear test; strength envelope