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In the construction of transportation network, road infrastructure is being developed intensively . Quality assurance is needed to prevent failure and ensure the length of performance. for measuring the quality of roadworks, especially asphalt, we can now use the laboratory version of Light weight deflectometer (LWD), which was developed by bina marga. Light weight deflectometer (LWD); has been developed for evaluation of surface stiffness that can be used to estimate the degree of compaction and determine modulus of elasticity. This research is based on laboratory testing that purpose to analyze the effect of asphalt density (AC-WC) towards deflection value and modulus of elasticity by using the laboratory version of LWD and then find the correlation between the elastic modulus of asphalt to variety in the height of mashing load.