• Yashwardhan Rawal
• Rupali Goud

This research study investigates the synergistic effects of polypropylene (PP) fibers as a partial replacement of sand and fly ash as a partial replacement for cement in the development of high grade (M 30 & M 40 ) fiber-reinforced concrete for high-exposure environments. Polypropylene fibers ( Monofilament) with a length in the range of 30mm – 35mm and Fly Ash of Class F grade are chosen as key additives . The study involves the casting of six batches of concrete beams, with varying proportions of PP fibers and fly ash Fly ash is incorporated as an admixture to enhance the overall performance of the concrete, with a specific focus on mitigating thermal effects. The concrete beams are subjected to comprehensive testing, with a primary emphasis on evaluating flexural strength. The variations in fiber types, proportions, and the influence of fly ash substitution for cement are systematically analyzed to assess the structural performance of the developed concrete. The findings of this research aim to contribute valuable insights into the optimization of fiber-reinforced concrete for high-exposure conditions. Both PP Fibres and Fly Ash are used in 0%, 0.25%, 0.50%, 1% and 1.5 % by weight of cement in concrete. Fresh and harden properties for both concrete with polypropylene fibre and with fly ash is determined and hybrid of optimum values calculated is used in a single mix and flexural strength is determined. The % increase in strength of hybrid with optimum values and separate mixes are determined and correlated with the conventional concrete’s strength. The findings of this research aim to contribute valuable insights into the optimization of fiber-reinforced concrete for high-exposure conditions. The results are anticipated to inform best practices for the utilization of industrial waste in concrete production and offer a pathway for the development of cost-effective and sustainable construction materials..

Fibre Reinforced Concrete , Flexural Strength , Fly-Ash , Fire Resistance , High exposure , Hybrid , Polypropylene-Fibre.

"Fibre Hybridisation for Resilient Structures - Polypropylene in Conjunction with Fly-Ash ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 5, page no.n683-n690, May-2024, Available :http://www.jetir.org/papers/JETIR2405D90.pdf

"Fibre Hybridisation for Resilient Structures - Polypropylene in Conjunction with Fly-Ash ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 5, page no. ppn683-n690, May-2024, Available at : http://www.jetir.org/papers/JETIR2405D90.pdf