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Title: Elastic Modulus of SIFCON in Tension and Compression

Author(s): A. E. Naaman, D. Otter, and H. Najm

Publication: Materials Journal

Volume: 88

Issue: 6

Appears on pages(s): 603-613

Keywords: compressive strength; deformed reinforcement; fibers; slurries; hooked reinforcement; modulus of elasticity; mortars (material); stress-strain diagram; tensile strength; Materials Research

DOI: 10.14359/1197

Date: 11/1/1992

Abstract:
A graphical evaluation of various analytical models predicting the modulus of elasticity of fiber reinforced composites is first presented. Upper and lower bound solutions and their applicability to fiber reinforced concrete and slurry-infiltrated fiber concrete (SIFCON) are discussed. An experimental investigation of the elastic modulus of SIFCON in tension and compression is then described. Dog bone-shaped tension specimens and cylindrical compression specimens were tested to determine the elastic modulus, the stress-strain response, and the peak strength of the composite. Two different types of fibers, two different aspect ratios, seven different levels of volume fractions, and four different matrix compositions were used. The value of the modulus of elasticity is found to be dependent upon not only the peak compressive strength, but also upon factors such as fiber volume fraction, fiber aspect ratio, fiber orientation and alignment, and testing procedure. Experimental data are analyzed, and conclusions are drawn.


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