International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 06 | June -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 2381 EXPERIMENTAL STUDY ON CONCRETE USING FLY ASH AND COCONUT COIR FIBER Sanjay Kumar Ahirwar 1 , Prof. Kirti Chandraul 2 , Prof. Manindra Kumar Singh 3 1 M.Tech Student Jawaharlal Nehru College Of Technology Rewa, M.P. 23 Assistant Professor, Dept. of Civil Engineering, J. N. C.T. College, Rewa, M.P., India --------------------------------------------------------------------------------***------------------------------------------------------------------------------ Abstract - In fast growing today's world, development of new building material, new technique and industrial or agricultural waste is being given the top priority. This is important for conservation of scarce resources and for achieving maximum disposal of waste. Energy generation is increasing day by day due to rapid industrialization. Energy generation through Thermal Power plants are very common now a days. Fly-ash is the by-product of thermal power plant which is available in large quantity in fine and course form. Fine Fly ash can be used as a binding material in concrete in the place of cement because fly ash is having Pozzolana property. The workability test, compressive and tensile strength tests were examined from the previous research papers at 7th, 14th and 28th day of curing. 5% and 10% replacement of cement with fly ash gives better result and by replacing 15% of fly ash the strength decreases. Then for improving tensile strength of concrete for 5% and 10% replacement of fly ash with cement is performed by adding coconut coir natural fibre of length 6mm and 12mm with quantity of 0.15% and 0.25% by weight of cement for M20 grade of concrete. All testing were performed for the comparison with natural concrete. Key Words: Fly ash, Coconut Coir fibre, Cement, compressive Strength and Tensile Strength. 1. INTRODUCTION Concrete made with Portland cement has certain characteristics: Concrete relatively strong in compression where as weak in tension and tends to be brittle. Another reason behind weakness of the concrete is that cracks start to form when concrete is placed and before it gets fully hardened. The cracks are major factor which affects strength of concrete in large onsite applications leading to failure, generally lack of fracture and durability. The weakness in tension of concrete can be overcome by the use of conventional steel bar reinforcement and to some inclusion of a sufficient volume of fibers. In this study we are comparing natural concrete and fly ash concrete with natural fiber. Fly ash is a waste material of thermal power plant abundantly available in India. Coconut Coir (CC) is a Natural fiber available in abundant quantity. Coir is a locally available material of low cost. Use of fibers enables reliable and effective utilization of intrinsic tensile strength of the material. This study is focussing on the effects of introducing various proportions of fly ash and coir fiber on concrete. An experimental study was carried out to find its effects on compressive and tensile strength. 2. LITERATURE REVIEW It was reported that application of polypropylene and Coir fibers improves the properties of plain concrete including tensile strength. Alhozaimy et al. observed that an addition of 0.1% of fibers in the plain concrete can increase 45% in flexural toughness of the concrete. Some researchers also reported some evidence on favourable effects of fiber addition on toughness. Mindessetal(1988) reported that compressive strength increased by about 0.25% at 0.5% volume fraction of fibers in the concrete mixture design. According to researchers investigation this project deals with the comparison of between conventional concrete, PP concrete and Coconut Coir concrete. 3. MATERIAL AND METHODOLOGY Concrete consists of three major components, viz. water, Portland cement, and aggregates. Properties of the final product i.e. cement changes according to the change in the ratio of its components and hence consequentially help the engineer in deciding the proper use of the same according to his need. To get a certain specific property in cement, Admixtures are added and hence enhance its required characteristic. 3.1 Water: The water in the concrete mix should be clean and free of impurities. The change in water content with respect of cement decides the properties of the cement like how easily the concrete flows, but also affects the final strength of the concrete. Excess water implies to easier flow of concrete, but decreases its strength. 3.2 Portland cement: On mixing the water, cement hardens and hence all the ingredients are bounded together. Portland cement is the most common cement used and is composed of alumina, silica, lime, iron, and gypsum. Small amounts of other ingredients are also included. 3.3 Aggregates: Most of the concrete mixtures consist of both coarse and fine aggregates, and help in increasing the