短繊維補強コンクリート（材料）(2)

[V-257] Mechanical properties and fracture mechanics properties of ultra high strength concrete mixed with steel fiber

〇tetsuo kawaguchi¹, toshitaka simazaki¹, hitoshi takeda¹ (1.TAISEI CORPORATION)

Keywords:Ultra high strength concrete, Steel fiber reinforcement, Mechanical properties, Fracture energy , Tensile softening curve

The authors have been studying the mechanical properties of ultra-high-strength concrete reinforced with 100N / mm2 class steel fiber using a newly developed special powder. In this study, the mechanical properties of ultra-high-strength concrete reinforced with 140N / mm2 class fiber were investigated by further expanding the range of strength levels. In addition, the fracture mechanics of ultra-high-strength concrete mixed with the fiber that exerted the highest reinforcement effect on bending strength and toughness coefficient was investigated.