International Journal of Discoveries and Innovations in Applied Sciences | e-ISSN: 2792-3983 | www.openaccessjournals.eu | Volume: 3 Issue: 6 Published under an exclusive license by open access journals under Volume: 3 Issue: 6 in Jun-2023 Copyright (c) 2023 Author (s). This is an open-access article distributed under the terms of Creative Commons Attribution License (CC BY).To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/ 1 Evaluation of Pozzolana’s Impact on Fibre Reinforced Concrete Ravi Roshan Research Scholar, Department of Civil Engineering, Sandip University, Madhubani, Bihar, India Onkar Yadav, Ajay kumar Assistant Professor, Department of Civil Engineering, Sandip University, Madhubani, Bihar, India Abstract: High-performance concrete is a specialized type of concrete that surpasses typical performance standards in terms of strength, flowability, and durability. While high-strength concrete is considered high-performance, the reverse is not always true. Achieving durability in concrete is challenging, and specifying high strength does not guarantee durability. To produce high- performance concrete, additional materials such as Ground Granulated Blast furnace Slag (GGBS), silica fume, Rice husk ash, Fly ash, and High Reactive Metakaolin can be used as partial replacements for cement. We conducted XRD tests on these materials to analyze their constituent variations. Maintaining an optimal water-cement ratio is crucial, and superplasticizers, water- reducing admixtures, play a vital role in achieving this. In our project, we tested materials like rice husk ash, ground granulated blast furnace slag, and silica fume to meet our desired requirements. We also performed X-ray diffraction tests on various pozzolanic materials to analyze their ingredient content. Synthetic fiber (Recron fiber) was incorporated at different percentages in the concrete mixture, and casting was carried out. Additionally, different percentages of silica fume were used as a cement replacement while keeping the fiber content constant. Two types of cement, Portland slag cement and ordinary Portland cement, were utilized. We prepared mortar, cubes, cylinders, and prisms for testing, including compressive, splitting, and flexural tests. Finally, porosity and permeability tests were conducted. Achieving the desired properties of high- performance concrete requires numerous trial mixes to select the optimal combination of materials. Keywords: Concrete, Pozzolanic materials, Admixture, Fibre reinforcement. 1. INTRODUCTION Concrete is a widely used construction material created by mixing cementitious materials, water, aggregate, and sometimes admixtures in specific proportions. When freshly mixed, it is known as plastic concrete, which can be shaped into various forms and eventually hardens into a solid mass called concrete. The hardening process occurs through a chemical reaction between water and cement, resulting in increased strength over time. During the first half of the previous century, concrete structures were constructed using ordinary Portland cement (OPC) and plain round bars of mild steel. The availability of concrete constituents and the belief that any combination of these materials would result in concrete led to a disregard for the importance of durability. Emphasis was placed on strength, while little thought was given to the long-term durability of structures. As a consequence, the durability of concrete and concrete structures has suffered, with a clear decline in quality.This decline can be attributed to several factors that gained momentum around 1970. Firstly, the use of high-strength rebars with surface deformations became common. Secondly, significant changes were made to the properties and constituents of cement. Lastly, engineers began incorporating supplementary cementitious materials and admixtures into concrete without adequate consideration. As a result, the journey towards self-destruction of concrete structures has