Environmental Engineering Reference
In-Depth Information
Figure 6.17.
Variation in residual strength of clays at slow rates of displacement (Skempton, 1985).
Called residual
strength incorrectly
τ
ε
(a)
First stage of test
Called residual
strength incorrectly
τ
ε
(b)
After winding back and forth say twice without
checking a minimum has been reached
Called
residual
strength
incorrectly
τ
Actual
residual
(c)
After multiple reversal minimum strength reached
ε
Figure 6.18.
Some all too common misconceptions in interpreting residual strength from direct shear tests.
