Uniaxial Tensile Response of Cement Composites Reinforced With High Volume Fractions of Carbon, Steel, and Polypropylene Micro-Fibers

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Title: Uniaxial Tensile Response of Cement Composites Reinforced With High Volume Fractions of Carbon, Steel, and Polypropylene Micro-Fibers

Author(s): N. Banthia, A. Moncef, and J. Sheng

Publication: Special Publication

Volume: 146

Issue:

Appears on pages(s): 43-68

Keywords: compressive strength; fiber reinforced concretes; matrix; microfibers; precast concrete; reinforced concrete; stiffness; strengthening; tension; Structural Research

Date: 6/1/1994

Abstract:
Stress-strain curves in uniaxial tension are obtained for microfiber reinforced concrete composites containing high-volume fractions of carbon, steel, and polypropylene fibers, both in mono and hybrid (combination) forms. Based on these curves, considerable strengthening, toughening, and stiffening of the host matrix due to microfiber reinforcement are demonstrated. Such fiber characteristics as geometry, tensile strength, elastic modulus, and surface texture are shown to be significant. In hybrid fiber composites, different fibers appear to act as additive phases, i.e., they maintain their individual reinforcing capabilities. The potential of these composites for use in thin-sheet products and similar applications, and the need for continued research in this area, are recognized.