Determination and assessment of deformation moduli of compacted lateritic gravels, using soaked CBR tests

This paper discusses the possibility to use CBR moduli, as deduced from CBR penetration curves, as parameters for the design of pavements. Series of CBR tests on compacted lateritic samples are analysed. These moduli, determined on soaked compacted samples, are compared with subgrade and resilient moduli of various types of materials from literature. The influence of water content in laboratory tests and full scale structures may play a significant role. CBR moduli offer an alternative to other ways of assessing the stiffness of pavement underlying layers.Experimental data on the relations of CBR index, CBR modulus, particle size distribution and optimum Proctor density are presented and discussed.