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

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.

• Periodical: Materials Science Forum (Volume 1046)
• Pages: 1-7
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1046.1
• Online since: September 2021
• Authors: Manjunath V. Bhogone, Kolluru V.L. Subramaniam*
• Keywords: Cohesive Stress, Fracture, Hybrid, Macro Polypropylene, Micro Polypropylene

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