Thin Whitetopping (TWT) is the process of rehabilitating distressed asphalt concrete (AC) pavements using a concrete overlay. Thin Whitetopping has the potential to become a low maintenance, green treatment for the AC pavements needing rehabilitation in the urban area because of unique advantages offered by concrete. This study was done to develop a design procedure for the AC pavements to be overlaid with TWT using finite element (FE) analysis. The FE analysis was performed with SolidWorks, a 3-D FE software program for different TWT thickness, existing AC layer thickness and modulus, bonding condition between TWT and existing AC layer, and temperature differentials. Each model was built as a three layer pavement system- concrete (TWT), asphalt layer and subgrade soil. The traffic load was modeled as a constant pressure with a rectangular area applied at the surface and with intensity equal to the tire inflation pressure of 100 psi. The expected lives of TWT overlays were estimated using the equations developed by the Portland Cement Association (PCA). The greener aspects of such a treatment were outlined.
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