International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
Strength Studies on Glass Fiber Reinforced Concrete Members by Partial Replacement of Natural Sand by Manufactured Sand Subjected to Acidic Attack Akshay Vastrad1, Dr. B.R. Patagundi2 1M.Tech Student
& Department of Civil Engineering, S.G.B.I.T. Belagavi, Karnataka, India & Department of Civil Engineering, S.G.B.I.T. Belagavi, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Professor
Abstract - Concrete is the most broadly used in the
construction field. It consists of a mixture of well graded fine and coarse aggregates and binding material such as cement, water and admixtures. In comparison to other constructing materials like steel and polymers, concrete is substantially extra brittle and exhibits a low tensile strength. According to fracture toughness values, concrete is at least 100 times less crack proof than steel in service thus concrete cracks prior, and this cracking creates clean way for deleterious agents ensuring in advance saturation, freeze than harm, scaling discoloration and metallic corrosion..In this study 25mm cut glass fibers are used ( 1%) and manufactured sand is used as partial to full substitute of natural sand to overcome the lack of good quality river sand and to prepare economic concrete mixes and tested for different strength tests of concrete. A total of 7 mixes of M30 grade of concrete were prepared by varying the percentage of M sand with a fixed percentage of glass fibers. The study work focused on the strength and durability characteristics of GFRC. All the specimens were tested for compressive, split tensile and flexural strength in the laboratory and results were reported. M30 grade of concrete is achieved and addition of glass fiber with 100% M sand gave the highest compressive and tensile strength and improved flexural strength to some extent. Key Words: Glass Fiber, GFRC, Compressive Strength, Tensile Strength, Flexural Strength, Acidic Attack.
1. INTRODUCTION Concrete is a completely robust and flexible construction material. It includes cement, fine aggregate and coarse aggregate combined with water. The Cement paste or gel binds the fine aggregate and coarse aggregate. Cement paste starts chemical reaction with the water, after the chemical reaction hardening process continues for long time, and the whole mix binds together. The preliminary reaction of hardening commonly happens within some hours. Few weeks requires for concrete to achieve maximum strength and hardness. It can preserve to complete harden to reach good strength for many years. Concrete made the usage of OPC has unique benefits and locate it irresistible and strong enough in maintaining compressive strain however likely in hold tension forces and as a result had a bent to get brittle. The fundamental fault in concrete is that it begins to expand Š 2017, IRJET
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crack quick and those cracks are decreasing the power of concrete and causing fracture, failure, and less durability assets. This drawback towards tension can successfully overcome through the usage of steel reinforcement and to a point by means of the use of addition of green quantity of fibers inside the concrete.
2. MATERIALS USED The OPC 43 grade cement of Ultra Tech Company has been used in the present experimental work. In this project fine aggregate is replaced for different mixes as 20%, 40%, 60%, 80%, and 100%. Specific gravity of the fine aggregate used in the project is 2.50.The M sand used in the present work is laid to zone-II. Specific gravity of M-sand is 2.57. In this project M sand is replaced for different mixes as 20%, 40%, 60%, 80%, 100%. Coarse aggregate used in the present work is angular dust free type, 20mm and down size course aggregates are used. Specific gravity of the coarse aggregate used in the project is 2.82. Water used for the preparation of wet concrete, preparation of hydrochloric acid solution and for curing of specimens is normal tap water. Glass fiber is of length 25mm. This fiber used in the experiment is 1% for all the mix proportion.
3. Methodology The mix proportioning procedure for the concrete was done according to IS 10262: 2009. The proportioning is carried out to achieve specified characteristics at specified age, Workability of fresh concrete and durability requirements. Concrete grade M 30 was proportioned according to the procedure as mentioned in the code.
4. Mix Proportion The basic mix proportion for M 30 grade of concrete is cement, fine aggregate, coarse aggregate and water and also in this experimental work 1% of glass fiber by weight of cement is adopted for mix M 2 to M 7 and M sand is replaced by natural sand by various percentages such as 20%, 40%, 60%, 80%, 100%. Total 7 mixes were studied. Water cement ratio of 0.45 for M 30 concrete was maintained for all the mixes. Details of these mixes are presented in table 1.
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