Geoscience Reference
In-Depth Information
Figure 4.5
Vane shear strength vs. moisture content (
after
Al-Raziqi
et al
., 2003).
Figure 4.6
Vane shear strength vs. organic content (
after
Al-Raziqi
et al
., 2003).
Figures 4.5 and 4.6 show graphs of vane shear strength vs. water content and
organic content of peat, which shows the decreasing behaviour of peat shear strength
with increasing moisture content and organic content.
According to Mitchell (1993), the effect of organic matter on the stiffness of soils
depends largely on whether the organic matter is decomposed or consists of fibres,
which can act as reinforcement. He investigated peat soil to study the effect of organic
content on the unconfined compressive strength of soil. The result is presented in
