International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
Experimental Investigation of Granulated Blast Furnace Slag as Fine Aggregate in Concrete Vaibhav S Pawar1, Abhijeet Kundlik2, Gaurav Fatkal3, Prof. S. Kori4 1,2,3U.G.
Student JSPM’S Imperial College of Engineering & Research, Pune Professor Jspm’s Imperial College of Engineering & Research, Pune ---------------------------------------------------------------------***--------------------------------------------------------------------1.2 Appearance Abstract - Concrete is a mixture of cement, aggregates and 4 Assistant
water which are economically available. Sand is a most important material used for preparation of mortar as well as concrete. In India, natural river sand (fine aggregate) is commonly used in mortar and concrete. Manufactured sand is somewhat different from natural river sand. The difference is that its surface characteristics are different from that of natural sand. Generally artificial sand is irregular and also it is more porous. Grading varies over a wide range which results in the internal porosity and reduction in workability of concrete.
GGBS after mixing with cement gives a very nice lighter white colour which gives a great advantage for the architectural view with low cost. To acquire such type of colour in concrete, GGBS content in cement should be from 50% to 70%. Adding GGBS in cement also produce a smooth surface due to which dirt does not adhere to the surface which reduces maintenance cost.
2. Objectives 1. To determine the optimum content of GBFS for the replacement of natural river sand.
Key Words: Aggregate, Slag, Blast, Furnace
1. INTRODUCTION
2. To check the behaviour of concrete in compression, tension and flexure strength.
Granulated blast furnace slag is a by-product of iron and steel which is produced in a blast furnace to produce a granular product. It can also be define as blast-furnace slag is a non-metallic product, which consists of silicates and aluminasilicates of calcium and other bases which can be developed in a molten condition with iron or steel in a blast furnace. Blast furnace slag as an aggregate in concrete provides environmental as well as economical benefits. Many steel industries in India are supplying GBFS as an alternative to sand.
3. To study the effect of concrete using GBFS over conventional concrete.
3. Literature Review – A. S. Al-Gahtani et al. (1994) studied a design for the evaluation of the relative corrosion of concrete produced by using Portland cements containing 2% to 14% C3A cement with and without 50%, 60%, 70%, and 80% cement replacement by blast-furnace slag (BFS).[1]
1.1 Types of blast furnace slag
K. Ganesh Babu and V. Sree Rama Kumar (2000), makes an effort to check the efficiency of concrete at the age of 28 days using GGBS at various replacement levels. The GBFS cement is replaced in concrete in the percentage of 10% to 80%. For 28 days evaluation, the overall strength efficiency factor ‘k’ varies from 1.29 to 0.70 for the replacement of 10% to 80%. The overall strength of concrete varies in from of 20MPa to 100MPa by replacing GGBS 10 to 80% [2].
There are many types of blast furnace slag. First type of slag includes blast furnace rock slag which can be used as a coarse aggregate for the construction of buildings but mainly for road construction. It is well known as blast furnace rock slag. Molten slag after leaving the blast furnace is directed towards the ground bays where it air-cools the slag to form a rock like material. BFS is used for the building construction in the production of concrete used as an aggregate. It is also used in the road construction for the preparation of base and subbase coarse. It can also be mixed with other materials for mechanically stabilizing as a cementitious material. When compacted, BFS develops a high degree of mechanical particle interlock which results in high shear strength partly due to its rough texture.
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Gengying Li and Xiaohua Zhao (2003) presents a laboratory investigation by using the combination of fly ash (FA) and ground granulated blast furnace slag (GGBS) over the properties of high strength concrete. Cengiz Duran Atis and Cahit Bilim (2007) reports a laboratory investigating the compressive strength of ground granulated blast furnace slag (GGBFS) of concrete carried under wet and dry curing conditions.
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