City Research Online

Abstract

Reactive powder concrete (RPC) is renowned for its exceptional mechanical characteristics; however, its brittle nature under shear stress limits its broader applications, particularly in seismic and impact-resistant structures. Incorporating steel fibers has shown promise in improving ductility and toughness, but the impact of fiber alignment on shear performance remains underexplored. This study investigates how variations in steel fiber orientation, volume fraction, and length affect the shear toughness of RPC specimens under quasi-static loading. An electromagnetic field orientation setup was employed to produce aligned steel fiber reactive powder concrete (ASFRPC) specimens, whereas ordinary steel fiber reactive powder concrete (SFRPC) specimens with randomly oriented fibers served as the control group. A series of double-sided direct shear tests combined with digital image correlation (DIC) techniques were conducted, focusing on varying fiber fractions (

Publication Type:	Article
Additional Information:	© 2025. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords:	Aligned Steel Fiber Reinforcement; Reactive Powder Concrete; Double Shear Test; Digital Image Correlation; Shear Strength and Toughness Indices; Energy Dissipation Mechanism; Crack-bridging Mechanism
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction
Departments:	School of Science & Technology School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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