Granular lateritic soils are available in many parts of the world including India and usually this does not meet the specifications for aggregates used in unbound granular layers of pavements. But, with depletion of sources for good quality aggregates, it has become necessary to use such marginal materials in pavement structural layers through proper stabilisation. Material characterisation is very essential in mechanistic design of pavements and therefore an attempt has been made in this study to evaluate the mechanical properties of cement stabilised granular lateritic soils (CLS), which would be useful during mechanistic design of pavements. The characterisation covers determination of unconfined compressive strength (UCS) in soaked and un-soaked state, flexural strength (FS) or modulus of rupture, indirect tensile strength (IDT) and flexural modulus (FM) through a detailed laboratory investigation process. For carrying out this study, soils were collected from three different sources located in the eastern part of India. Relationships have been established between different mechanical properties, which will help the designers to predict suitable stiffness/modulus values for pavement analysis. Effectiveness of the strength ratio (soaked/un-soaked strength) in evaluating the suitability of CLS as a bound material for pavements has also been discussed in this paper.
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