APPLICATION OF HPC IN A NEW HAMPSHIRE BRIDGE

The University of New Hampshire performed field and laboratory testing on three different mix proportions as part of the project research work. The mix that exhibited the best performance was ultimately selected as a basis for the HPC bridge deck specification. The final product exceeded expectations. No visible cracks in the top surface of the deck were found during several post-construction reviews conducted by research, construction, and design personnel. The 28-day concrete strength exceeded the specification requirement. It should be noted that the modulus of elasticity was lower than expected. The freeze-thaw durability, chloride ion permeability, and scaling tests revealed excellent results. Based on preliminary evaluations, the concrete deck will be highly resistant to chloride intrusion and freeze-thaw deterioration and should provide superior long-term service.