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of peats. However, their tests were in a K o -test tube and they were concerned about
the elastic rebound response of the tube wall influencing their data during unloading.
4.8 SUMMARY
The shear strength of a peat deposit depends on degree of humification, water content
and mineral content. The higher the moisture content the lower will be the shear
strength; the higher the degree of humification the lower the shear strength; and the
higher the mineral content the higher the shear strength.
Measuring the in situ shear strength of a peat deposit in the laboratory is not easy,
due to the difficulty in obtaining a good representative sample in the field, getting it
to the laboratory quickly and trimming it to size without disturbance. Because of this,
simple in situ field tests, such as the vane test, have been used to give an indication of
in situ shear strengths. These have their limitations, however, and should not be relied
upon without supporting evidence.
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