Bond Characteristics of Steel Fiber Reinforced Self-Compacting Concrete

Natl Research Council Canada
Publication Type:
Journal Article
Canadian Journal Of Civil Engineering, 2012, 39 (7), pp. 834 - 848
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Steel fiber reinforced self-compacting concrete (SFRSCC) is a relatively new composite material which congregates the benefits of the self-compacting concrete (SCC) technology with the profits derived from the fiber addition to a brittle cementitious matrix. Steel fibers improve many of the properties of SCC elements including tensile strength, ductility, toughness, energy absorption capacity, fracture toughness and cracking. Although the available research regarding the influence of steel fibers on the properties of SFRSCC is limited, this paper investigates the bond characteristics between steel fiber and SCC. Based on the available experimental results, the current analytical steel fiber pullout model (Dubey, 1999) is modified by considering the different SCC properties and different fiber types (smooth, hooked) and fiber inclination. In order to take into account the effect of fiber inclination in the pullout model, apparent shear strengths (Ï(app)) and slip coefficient (β) are incorporated to express the variation of pullout peak load and the augmentation of peak slip as the inclined angle increases. These variables are expressed as functions of the inclined angle (Ï).
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