Improved Early-Age Cohesive Stress Response from Hybrid Blends of Micro and Macro Fibers

Bhogone, Manjunath V. and Subramaniam, Kolluru V.L. (2021) Improved Early-Age Cohesive Stress Response from Hybrid Blends of Micro and Macro Fibers. In: 4th International Conference on Material Engineering Research, ICMER 2021, and the 6th International Conference on Applied Engineering, Materials and Mechanics, ICAEMM 2021, 14 May 2021 through 16 May 2021, Incheon.

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Abstract

The fracture response of macro polypropylene fiber reinforced concrete (PPFRC) and hybrid blend of macro and micro polypropylene fiber reinforced concrete (HyFRC) are evaluated at 1, 3, 7 and 28 days. There is an improvement in the early-age fracture response of HyFRC compared to PPFRC. The changing cohesive stress-crack separation relationship produced by ageing of the concrete matrix is determined from the fracture test responses. An improved early-age cohesive stress response is obtained from the hybrid blend containing micro and macro fibers. The hybrid fiber blend also has a higher tensile strength at early age when compared to an identical volume fraction of macro polypropylene fibers. © 2021 Trans Tech Publications Ltd, Switzerland.

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