Toughness of Steel Fiber Reinforced Polymer Cement Matrix Composites


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Title: Toughness of Steel Fiber Reinforced Polymer Cement Matrix Composites

Author(s): Xu Bin-bin and Yao Lian

Publication: Special Publication

Volume: 93


Appears on pages(s): 143-158

Keywords: bend tests; composite materials; cracking (fracturing); fiber reinforced concretes; metal fibers; mortars (material); plastics, polymers, and resins; toughness

Date: 9/1/1986

In China steel fiber reinforced concrete has been used in several projects including the highway, street, overlay of airfield pavement, mining and tunneling, explo-sion- proof gate, etc. In this paper the toughness and the toughness index of steel fiber reinforced polymer cement matrix composites are studied. In particular, Jm, computed by an approximate for-mular of J-integral under the pe ak 1oad of load-deflection curve, as a toughness index to t hese composites is discussed. Three-point bend tests both on the notched beams and the unnotched beams of steel fiber cement composites are per-formed. O n the basis of results, the effects of the follow-ing factors: matrix, fiber content, aspect ratio, and fiber diameter, on the toughness of the steel fiber cement compos-ites are analyzed. As a result of the synergistic effect of steel fiber, polymer and matrix, the toughness of steel fiber reinforced polymer cement concrete is much higher than that of steel fiber reinforced concrete.