Joing Hu, G Morcous
Nebraska DOT, FHWA
Admixtures, Curing and setting agents, Durability, Fillers (Materials), Mechanical properties, Self compacting concrete, Structural analysis, Ultra high performance concrete
Ultra-high performance concrete (UHPC) is a new class of concrete that has mechanical and durability properties that far exceed those of conventional concrete. The use of UHPC will result in significant improvements in the structural capacity and durability of bridge components. As a result, issues such as cracking and leakage in bridge wet joints can be largely eliminated. However, because of the highly sophisticated mixture design and raw material availability, the current use of UHPC in the United States (U.S.) is limited to proprietary pre-packed products provided by international suppliers. The high material cost associated with these products, which can be as high as $2,000 per cubic yard in additional to batching, placing, and curing costs, has greatly prevented the wide use of UHPC in bridge applications. Therefore, there is an urgent need to develop economical non-proprietary UHPC mix(es) with materials readily available in Nebraska.