International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 08 | Aug 2022
p-ISSN: 2395-0072
www.irjet.net
Strength Characteristics of Coconut Fiber reinforced concrete S. Thrilokanatha Reddy1, S.Nagalaxmi 2, P.Chaitanya3 D. Sai Priyanka4 1Assistant
Professor, TKREC, Hyderabad Professor, TKREC 3Assistant Professor TKREC 4 Assistant Professor TKREC ---------------------------------------------------------------------***--------------------------------------------------------------------Coconut fibre with a tensile strength of 21.5 Mpa is the Abstract – This paper presents the possibility of utilizing 2Assistant
toughest among all natural fibres. They are capable of taking strains 4 to 6 times higher than other fibres.
coconut fiber as a supplementary reinforcement material in concrete. Various fibers are used in concrete. Coconut fibers are easily available in large quantity and are also cheap. In this study experimental investigations are carried out to know the workability, compressive strength and split tensile strength of coconut fiber reinforced concrete. the cement was partially replaced with six percentages say 0%, 1%, 2%, 3%, 4%, 5% of coconut fiber by weight of cement. the compressive strength and split tensile strength of cured concrete is evaluated for 7days, 28 days. these results show that coconut fiber can be used In construction or not.
2. METHODOLOGY 2.1 MATERIALS: The following materials were used for preparing the concrete mix of M20.
Key Words: Reinforcement, coconut fiber, concrete, compressive strength, split tensile strength.
1. INTRODUCTION As we know that concrete is the widely used construction material throughout the world. Concrete is weak in tension and flexure so it is reinforced with steel bars. Various types of fibres were used in concrete to make more strong, durable and economical. Naturally available fibre such as coconut fibre having physical and mechanical characteristics that can be used in the development of reinforced concrete material. These coconut fibres are easily available in large quantity with low cost. The goal of this paper is to study the properties of concrete by adding coconut fibres and to determine the compressive strength and split tensile strength of concrete after addition of coconut fibres. To know the performance of coconut fibres in concrete to reduce cracking. Utilisation of these fibres in concrete leads to and effective solid waste management technique. The introduction of fibres is a solution to develop concrete with enhanced compressive strength and split tensile strength. NFRC (Natural Fibre Reinforced Concrete) is the one of the FRC (Fibre Reinforced Category). Using of FRC is gradually gaining acceptance from civil engineers. In recent years research and development of fibres related to construction industry have grown rapidly. Coconut fibre is more ductile among all natural fibres and has the potential to be used as the reinforcing material in concrete. It is biodegradable soothe impact on the environment will be minimum.
OPC (Ordinary Portland Cement) of 53 grades
Fine aggregate i.e. sand
Aggregate
Coconut fibers
Water
OPC: Ordinary Portland Cement of grade 53 cement was used in this study.
Fine aggregate: The fine aggregate was natural river sand which is freely available. The sand is passes through a 4.75 mm sieve and contained more than 5% coarse particles so that it reduces the porosity of the final mass and considerably increases its strength usually.
Coarse aggregate: it is the important constituent material in concrete. It occupies 60 to70% of concrete. For this study locally available crushed stone aggregates of size 20 mm are used and the various tests are carried out on the aggregates as per IS 2386-1963(IV).
Coconut fibers: these are collected from the local temples, cleaned, sundries and removed dust particles to analyze its properties. Coconut fiber has high water absorption. Due to this property, the coconut fibers of 6 mm in length were pre soaked in water for 24 hours.
The aim of this study was to identify the improvement in strength characteristics of concrete with the addition of oil coated coconut fibre so as to decrease the water absorption.
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