Laboratory Study on CBR Value of Black Cotton Soil Treated With Crushed Coconut Shells
Unpaved roads that are constructed on weak soil Subgrade result in large deformations combined with
interruption in traffic operations resulting in high maintenance costs. This limits their usage for low volume of traffic and to
serve as access roads. Limited studies have been conducted on the use of crushed coconut shells to improve the strength of
the Subgrade. In the present study, crushed coconut shells are added in different amounts to study the strength of the black
cotton soil subgrade which is a weak soil. The results of the study indicate improvement in the CBR values of the weak
Subgrade soil with the inclusion of crushed coconut shells.
Keywords- Black Cotton Soil; Crushed Coconut Shells; California Bearing Ratio