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Multi-reversal Direct Shear Test
- Thread starter GTNOP
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I assume you are speaking of obtaining residual shear strengths.....you can use 3 normal loads on the same sample. However, the direct shear test is messy for this procedure and a torsional ring shear is recommended (ASTM D6467). You can also check out Tim Stark's research in the Geotechnical Journal to use liquid limits, clay fraction and overburden stresses to estimate residual phi angles.
Hope this is of some help.
Hope this is of some help.
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