Development of High Performance Concrete for Use on Tennessee Bridge Decks and Overlays

The purpose of this study was to develop a High Performance Concrete mix design to be used on bridge decks and overlays in Tennessee. A total of eight mix designs were tested in this study. Both gap-graded and dense-graded aggregate combinations were used in the study.

Each mix was tested for fresh and hardened concrete properties. Fresh properties include slump, air content, unit weight, and temperature. Hardened properties include 7 and 28-day compressive strength, freeze-thaw durability, drying shrinkage, and chloride ion permeability.

Although further research is recommended, one promising mix was found as a result of this study. Mix 2F1 (dense-graded with 25% fly ash replacement) was found to meet all performance characteristics and was chosen because it has possible economic savings.