Structural evaluation and quality assurance of flexible pavement using Light Weight Deflectometer

India is rapidly growing country and many road structures are in constructing phase. It is required to be compliance with quality assurance for prevent failure and long performance. Quality assurance work involves the compaction parameter but from recent years, it is moving to a modulus-based method. The aim of this paper is to evaluate the elastic modulus of flexible pavement using portable light weight deflectometer and develop a relation with density and moisture content for quality assurance. In situ test measurements are taken on 40 test locations, the LWD used for determine elastic modulus, core cutter method used for density and samples are tested for moisture content in a laboratory. Elastic modulus is back-calculated using LWDmod software. The multiple linear regression relation shows a coefficient of determination (R2) of 0.491 and trend line of elastic modulus increases with an increase in bulk density and decrease in water content.