A thin-layer surface reinforcement method using UHPFRC (ultra-high-performance fiber reinforced cementitious composite material) "Stiff-CreteTM" was developed for the reinforcement of existing deck slabs. This method can significantly improve the long-term durability of the slab while minimizing the thickness increase of the slab.

The newly developed Stiff-Crete is a material that takes advantage of the room temperature curing UFC "Slim-Crete". The use of ultra-high strength material enables reinforcement in thin layers and provides excellent long-term durability. Furthermore, the high early strength of the Stiff-CreteTM enables early opening to traffic, minimal impact on highway users, and is applicable for bridges with a sloped surface.