RELATIONSHIP BETWEEN FIELD CBR AND DYNAMIC DEFLECTION MODULUS FOR BC SOIL

Light Weight Deflectometer (LWD) simulates the effect on subgrade caused due to constant dynamic load. In our study, we tried to relate dynamic deflection modulus with Field California Bearing Ratio (FCBR). The FCBR test was used to determine CBR on the field to counter practical problems associated with Lab CBR. These tests were performed at 26 testing points, with a distance of around 2.5m between two test points. The test results showed that there is a strong linear correlation between FCBR and Dynamic Deflection Modulus (Evd) for black cotton soil in saturated condition. By using LWD instead of FCBR would result in better quality control, significant cost and time saving.