This project will use fundamental heat and mass transfer principles to predict the temperature. water content. and unreacted cement profiles that exist during the first 72 hours of curing in concrete pavements and bridge decks. The goal of the project is to determine under what conditions concrete can be successfully placed. All pertinent heat and mass transfer mechanisms will be considered. A two-dimensional model of a bridge deck will be developed and model results will be compared with actual experimental data. Traditional concrete and concrete containing flyash and microsilica additives will be considered. Where possible, the information from this program will be used to calculate the thermal stresses in the concrete.