Fracture Resistance of Acrylic Fiber Reinforced Mortar in Shear and Flexure

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Title: Fracture Resistance of Acrylic Fiber Reinforced Mortar in Shear and Flexure

Author(s): R. J. Ward, K. Yamanobe, V. C. Li, and S. Backer

Publication: Special Publication

Volume: 118

Issue:

Appears on pages(s): 17-68

Keywords: acrylic resins; fiber reinforced concretes; flexural strength; fracture properties; mortars (material); shear strength; synthetic fibers; tensile strength; Structural Research

Date: 1/1/1990

Abstract:
Results of notched beam, direct tension, splitting tension, compression, shear beam, and flexural tests on plain mortar and on mortar reinforced with different volume fractions of short acrylic fibers are reported. An indirect J-integral technique is employed to determine the tension-softening curve and thus the tensile strength, the fracture energy, and the critical crack opening from the notched beam test results. As the volume fraction of fibers is increased, the strength in shear and flexure, the fracture energy, and the critical crack opening all increase, the tensile strength remains essentially constant, and the compressive strength shows some reduction. The characteristic length lch is used as a material property to characterize the post-peak tensile behavior. The shear and flexural strengths are related to the normalized dimension d/lch, and good agreement between the experimental results and theoretical predictions of decreasing strength with increasing d/lch is found.