Abstract
The paper is the second part of the study on binary superposition mix design method for steel fiber reinforced concrete (SFRC), which introduces the experimental results of flexural tensile strength and flexural toughness of SFRC. Based on the test, the effects of fraction of steel fiber by volume and average thickness of cement paste wrapping steel fibers on flexural tensile strength and toughness of SFRC are analyzed. The effect coefficient of steel fiber on flexural tensile strength of SFRC is suggested on the basis of the formula specified in current technical specification for fiber reinforced concrete structures. The flexural toughness of SFRC raises with the increase of fraction of steel fiber by volume, but less affected by the average thickness of cement paste wrapping steel fibers.
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