Ultimate Strength of Fiber-Reinforced Concrete under Cyclic, Flexural Loading.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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Cyclic flexural fatigue tests were conducted on 6- by 6- by 36-in. fiber-reinforced concrete beams containing 0.5-in. and 1.0-in. steel fibers to determine the change in ultimate flexural strength under fatigue loading. The beams were cycled at 3 Hz until failure occurred or 2 million cycles of load terminated the tests. The beams with 0.5-in. fibers produced a smaller change 45.22 percent in ultimate flexural strength than the beams containing 1.0-in. fibers 49.68 percent. The method of failure of the beams was by a gradual breakage of the bond between the steel and paste after the development of a crack in the concrete matrix, resulting in pullout of the fibers from the matrix. Author
- Ceramics, Refractories and Glass
- Laminates and Composite Materials