A Critical Review of Correlation between different Engineering Properties of Subgrade soil

Abstract

In the flexible pavements sub-grade is considered to be an ideal layer to resist wheel load and its CBR value is
considered as the strength measuring parameter. Conducting CBR test is an expensive and very time consuming test, so it is
very tricky to mould the sample at a desired in-situ density in the laboratory. In the present study attempt is being a develop
relationship between DCPT value and CBR and Unconfined compressive strength(UCS).CBR can't be easily measured in the
field, assumption of CBR from other simple tests such as Dynamic Cone Penetrometer (DCP) and unconfined compressive
strength (UCS). A soil property is a Valuable alternative. So the main objective of this study (1) toclassify the soil samples of
different region based on index properties. (2) To determine the subgrade strength parameters like California bearing ratio
(CBR) (soaked & unsoaked), dynamic conepenetration test(DCPT)& Unconfined compressive strength (UCS). (3) To develop
the correlation between different engineering properties of subgrade soil like CBR, DCPT & UCS.