A study on the correlation of the shear modulus of soil with the California bearing ratio and dynamic cone penetration value

Stiffness of the base and sublayers is an important parameter in the design and quality assurance of pavements. In existing pavements, prior to resurfacing, it is essential to know the condition of the base that has been subject to traffic loading and environmental conditions. When failure of a pavement occurs, a quick and accurate measurement of the properties of the base layer is essential. The most popular methods are CBR, dynamic cone penetration and resilient modulus tests. The bender element technique, which is applicable to a wide variety of soils, can be used on existing pavements under construction in the field. To accept a method for design purposes, it should be validated with the conventional methods such as the penetration methods and CBR method. This study aims at developing a correlation between the Dynamic Penetration Index (DPI) and CBR values with the shear modulus obtained from this method. A correlation of these values with the shear modulus can be of use to our road sector.