短繊維補強コンクリート（構造）(1)

[V-57] Tensile fatigue bond test for the surface by using UHPFRC

*松田 有加¹、渡邊 有寿¹、一宮 利通¹、横田 祐起¹、牧田 通²、北川 寛和² (1. 鹿島建設、2. 中日本高速道路)

Keywords:large-scale renovation・repair, highway bridge slab, replacement・reinforcement, Ultra High Performance Reinforced Concrete, bond fatigue caracteristic

Steel Fiber Reinforced Concrete is often used for repair or reinforce slab of bridges. We expect that durability and strength of slab are improved by using Ultra High Performance Fiber Reinforced Concrete (UHPFRC) which has higher durability and strength than SFRC. On the hand, bond strength of construction joint is the most important thing for integrity of slab. Therefore, in this study, we conduct tensile fatigue test, and We got S-N curve by using the test results. By using the S-N curve, we will consider the assesment of slab repaired or reinforced with UHPFRC.