Life - cycle optimization of pavement overlay systems

A life-cycle optimization LCO model was developed to determine an optimal preservation strategy for a pavement overlay system and to minimize the total life-cycle energy consumption, greenhouse gas GHG emissions, and costs within an analysis period. Using dynamic programming optimization techniques, the LCO model integrates dynamic life-cycle assessment and life-cycle cost analysis models with an autoregressive pavement overlay deterioration model. To improve sustainability in pavement design, a promising alternative material for pavement overlays, engineered cementitious composites ECCs, was studied. The LCO model was applied to an ECC overlay system, a concrete overlay system, and a hot mixed asphalt HMA overlay system.