Flexural Behavior of High Performance Cementitious Composites Reinforced With Hooked Steel Fibers

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Abstract

This research investigates the mechanical properties of High Performance Fiber Reinforced Cementitious Composites (HPFRCC) with two volume fractions of fiber (1% and 2%). Hooked steel fibers were incorporated into a mortar matrix with 49 MPa compressive strength. Four point bending tests were carried out according to ASTM C1018 and ASTM C1609 Standards. Parameters such as: load carrying capacity (equivalent bending strength), energy absorption capacity (toughness) , deflection, and cracking patterns (number of cracks), were evaluated to investigate the flexural behavior of two HPFRCCs. It was found that the increase in fiber volume fraction not only promotes the flexural behavior from deflection softening to deflection hardening, but also improves all mechanical properties. Deflection capacity gains the most from deflection hardening behavior. Besides, substantial increase in load carrying capacity and energy absorption is also achieved. It was observed that HPFRCC with deflection hardening behavior exhibits multiple cracking in the post cracking behavior.

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References

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Journal of Solid and Fluid Mechanics
Volume 5, Issue 3 - Serial Number 3
September and October 2015
Pages 125-136

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