International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Experimental Study on the Mechanical behaviour of Sisal Fibre Reinforced Self-Compacting Concrete NIVETHA K1, CHELLA KAVITHA N 2 , KAVIYARASI T3 1PG
student, Department Of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu, India 2Assistant Professor, Department Of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu, India 3PG student, Department Of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract – Self-Compacting Concrete is one which compacts
fibre [2], glass fibre and their combinations were used. Only few works have been carried out using natural fibre as reinforcement for self-compacting concrete. In this project sisal fibre which is a natural fibre was added to self-compacting concrete in four different percentages 0.25, 0.5, 0.75 and 1. The fresh state properties of self-compacting concrete were determined to ensure whether they are within the permissible limits prescribed in EFNARC. Mechanical properties like compressive strength and flexural strength were also determined.
under its own weight without any external vibration. It also possesses properties such as limited ductility, low cracking resistance and low tensile strength. This can be considerably overcome by adding fibres to SCC. With the view of sustainable development, in this study sisal, a natural fibre is used to reinforce Self-Compacting Concrete in four different percentages 0.25, 0.50, 0.75 and 1.00. Their effects on fresh state and hardened state were studied. The addition of sisal fibre reduced its workability and Self-Compacting Characteristics were also affected depending upon the fibre content. The experimental results showed that Sisal Fibre Reinforced Self-Compacting Concrete (SFRSCC) has improved mechanical properties. Optimum percentage of fibre content was found to be 0.5 for which compressive strength and split tensile strength were increased by 15% and 18.7% respectively.
2. EXPERIMENTAL PROGRAM 2.1 MATERIALS Cement used in this study was ordinary Portland cement. Fly Ash was used as mineral additive; it had a specific gravity of 2.1. The coarse aggregate was natural siliceous gravel of nominal size of 12.5 mm and below, a specific gravity of 2.63. The sand used was river sand with fineness modulus of 2.67, a specific gravity of 2.6. A sulphonated naphthalene polymer based super plasticizer was used in the study. The specific gravity of the admixture was 1.27. A Viscosity Modifying Admixture (VMA) was used to prevent segregation. Sisal fibre of 20mm length used in this investigation is shown in Fig.1.
Key Words: sisal fibre reinforced self-compacting concrete, sisal fibre, slump flow, v funnel, l box.
1. INTRODUCTION Self-compacting concrete (SCC) is a concrete that can be placed and compacted under its own weight without mechanical vibration. In other words, the SCC should have sufficient flowability to ensure an appropriate filling of structural elements and enough viscosity to prevent settlement of coarse aggregate particles and to maintain the uniformity of concrete. Ordinary self-compacting concrete possesses low tensile strength, limited ductility and little resistance to cracking. Internal micro-cracks are inherently present in the concrete and its poor tensile strength is due to propagation of such micro-cracks, leading to brittle failure of concrete. This weakness can be considerably overcome by the inclusion of fibres in the concrete mix. These fibres enhance cracking resistance, thus improving the mechanical properties and extend the possible fields of application of SCC. So far synthetic fibres like steel fibre [1], polypropylene
Š 2017, IRJET
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Impact Factor value: 5.181
Fig -1: Sisal Fibre
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