Experimental Study of Strengthening and Toughening for Recycled Steel Fiber Reinforced Ultra-High Performance Concrete

Abstract:

This paper presents an experimental investigation on mechanical properties (including compressive strength, tensile splitting strength and fracture energy) of ultra-high performance concrete (UHPC) with recycled steel fiber, compared with none fiber and industrial steel fiber reinforced UHPC. Moreover, the microscopic observation of fracture energy was carried out. All specimens were prepared at 0.18 water /binder (W/B) ratio and the dosage of steel fiber was controlled at 60 kg/m³. The results indicate that recycled steel fiber has a significant effect on enhancing strength and toughness of UHPC. And owing to the crimped shape, higher tensile strength (1800-2000 MPa) and appropriate diameter (1 mm) of recycled steel fiber, the steel fibers of UHPRSFRC will not immediately be pulled off and necking phenomenon is distinct.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 104-111
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.104
• Online since: October 2014
• Authors: Gai Fei Peng*, Xu Jing Niu, Qian Qian Long
• Keywords: Compressive Strength, Fracture Energy, Freeze-Thaw Cycle, Recycled Steel Fiber, Tensile Splitting Strength, Ultra-High Performance Concrete

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