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
Performance Evaluation of Glass Fibre Reinforced Concrete Prof. Anu Retnakar, Aswin.S, Shamju Kaja Hussain.S, Shilpa.T.S, Varun.V, Sandeep Kumar. M.D Dept. of Civil Engineering, Ahalia School of Engineering and Technology, Kerala, India --------------------------------------------------------------------------------------------------------------------------------------------Abstract - Researchers all over the world are attempting
characteristics (2.5-4.8 % elongation at break) and low creep at room temperature. Glass fibres are usually round and straight with diameters of 0.005 to 0.015 mm. They can be bundled with bundle diameter of 1.3 mm.
to develop high performance concretes by using fibres and other admixtures in concrete up to certain proportions. Glass Fibre Reinforced concrete (GFRC) is a recent introduction in the field of concrete technology. GFRC is concrete that uses glass fibres for reinforcement instead of steel. The present study has been taken up for evaluating the different percentage concentration of glass fibre. Emphasis has been given to the workability, compressive strength and flexural strength properties of glass fibre concrete beams. The different dosages of glass fibre are (0%, 0.2%, 0.4% and 0.6%)
1.1 Advantages • GFRC is prepared of minerals and will not easily burn. When exposed to a flame, the concrete function as a thermal regulator. It protects the materials fixed with it from the flame heat. • These materials are comparatively lighter when compared to the conventional materials. Their installation is therefore fast, and normally simple. Concrete may be produced in thin sections.
Key Words: Glass fibre, Concrete, compressive strength, flexural strength, durability, deformation
• GFRC may be cast to almost any shape of columns, wall panels, domes, mouldings, and fireplace surrounds.
1.INTRODUCTION
• High strength can be obtained by using GFRC, being tough and resistant to cracking. It has a high strength-toweight ratio. • GFRC products are durable and light. The transportation costs are reduced significantly being of less weight.
The application of cement concrete is limited due to the characteristics of brittle failure. This can be overcome by the inclusion of a small amount of short and randomly distributed fibres. Such concrete can be practiced where there is a weakness of concrete such as less durability, high shrinkage cracking, etc. Concrete has some deficiencies such as low tensile strength, brittleness, highly porous, susceptible to chemical and environmental attack. The above deficiencies of plain concrete are overcome in the new materials which have unique characteristics, which make them highly susceptible to any environment. Fibre reinforced concrete is one of them and relatively a new composite material in which concrete is reinforced with short discrete (length up to 35 mm), uniformly distributed fibres so that it will improve many engineering properties such as flexural strength, shear strength and resistance to fatigue, impact and eliminate temperature and shrinkage cracks. Fibres of lengths up to 35 mm are used in spray applications and 25 mm length premix applications. Various types of glass fibres used in construction industries are glass, steel, natural fibres, poly propylene, asbestos, carbon, basalt, etc. Glass fibre has high tensile strength (2-4 GPa) and elastic modulus (70-80 GPa), brittle stress-strain
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• Since GFRC is internally reinforced, other types of reinforcement are not necessary that may be complicated for complicated moulds. • Suitable consolidation of mix is achieved for GFRC that is sprayed, without any vibrations. Use of rollers or vibrators, to attain consolidation, is simple for GFRC that is poured.
2. MATERIALS USED The key materials used in this study were cement, sand, glass fibre and water. The cement used is Portland pozzolana cement (PPC) of 43 grade. Alkaline resistant 12mm glass fibre is used .The portable water from well is used for mixing and curing the concrete.
2.1 CEMENT Portland cement is the most common type of cement, used as a basic ingredient of concrete, mortar. It is a fine powder produced by heating materials in a kiln to form clinker, grinding the clinker, and adding small amounts of other materials. PPC cement is manufactured by using
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