Strength and Durability Study of Geopolymer Concrete with 100% Replacement of Sand using Copper Slag

S Sivaranjani¹, M Sridhar²

^1,2Assistant Professor, Department of Civil Engineering,
Vel Tech Rangarajan Dr. Sangunthala R&D Institute of Science and Technology, Chennai, India.

Abstract

One of the regularly used man made building material in the word is concrete. This concrete is comprising of sand and gravel. They are chemically inert and very hard. It is blended together by the addition of cement and water. Among these components, cement and sand are correlated with some issue which is considered as the drawback of the concrete. Requirements of the huge amount of energy, emission of carbon dioxide, increasing demand of river sand, over priced of river sandare some of the problems have been confronted by construction industries during the use of conventional concrete. On the other hand, industrial by products are producing in huge amount which is not used properly by our country. Hence it is mandatory to find out the substitute solution to control these problems. Many alternatives have been founded by researchers. Geopolymer concrete is renowned among many alternatives. It consumes an alkaline solution along with industrial by-products and aggregates. The Alkaline solution is prepared by combining sodium hydroxide with sodium silicate. This alkaline solution reacts with silica and alumina present in the source material to produce an alumino silicate gel which is act as a bonding agent in geopolymer concrete. In this work, sand and cement were completely replaced by copper slag and fly ash respectively. Sodium silicate to sodium hydroxide ratio was taken as 2.0. Three different molarities i.e. 8M, 12M, and 16M were taken as test variables. Mechanical properties of this concrete were determined by conducting the tests. The compressive and split tensile strength of this geopolymer concrete was more or less similar or slightly greater than the normal geopolymer concrete. The maximum compressive strength obtained by copper slag based geopolymer concrete was 38 N/mm2 and 4.77 N/mm2 was the maximum tensile strength after 28 days of the oven curing. Production cost of copper slag based GPC is less when compared to normal geopolymer concrete. From the durability aspects view it shows good resistance to chemicals attack.

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Cite this Article as Follows

S Sivaranjani, M Sridhar. Strength and Durability Study of Geopolymer Concrete with 100% Replacement of Sand using Copper Slag. International Conference on Global Environmental Changes and Sustainable Development (2019): 90. Print.