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The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Most of this by-product material is currently dumped in landfills, creating a threat to the environment. We can reduce the pollution effect on environment, by increasing the usage of industrial by-products in our construction industry. Geo-polymer concrete is a concrete in which Portland cement is fully replaced by fly ash and GGBS (Ground granulated blast furnace slag). Geo-polymer concrete is a 'new' material that does not need the presence of Portland cement as a binder. Instead, the source of materials such as fly ash, that are rich in Silicon (Si) and Aluminum (AI), are activated by alkaline liquids to produce the binder. Hence it is the concrete with no Portland cement. The present study covers the use of plastic Waste in geo-polymer concrete as partial replacement of fine aggregate. Sand is replaced with plastic waste at 5, 10, and 15 percentages respectively. Alkaline liquids used in this study are the solutions of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). Molarity of sodium hydroxide (10M) is considered. Fly ash and GGBS were used in different combinations and percentages respectively. This study is conducted to know the compressive strength of Geopolymer concrete with plastic waste and to compare the same with Geopolymer concrete without any replacement of fine aggregate. key words: Geo-polymer concrete, CO2 emission, GGBS, plastic waste, fly ash. INTRODUCTION For the construction of any structure, Concrete is the main material. Concrete usage around the world is second only to water. The main ingredient to produce concrete is Portland cement. On the other side global warming and environmental pollution are the biggest menace to the human race on this planet today.. Combustion of fossil fuels to operate the rotary kiln is the largest source and other one is the chemical process of calcination limestone into lime in the cement kiln also produces CO2.In India about 2,069,738 thousands of metric tons of CO2 is emitted in the year of 2018. The cement industry contributes about 5% of total global carbon dioxide emissions. But the demand of concrete is increasing day by day for its ease of preparing and fabricating in all sorts of convenient shapes. So to overcome this problem, the concrete to be used should be environmental friendly. To produce environmental friendly concrete, we have to replace the cement with some other binders which should not create any bad effect on environment. The use of industrial by products as binders can reduce the problem. In this respect, the new technology geo-polymer concrete is a promising technique. In terms of reducing the global warming, the geopolymer technology could reduce the CO2 emission to the atmosphere caused by cement and aggregates industries by about 80%. And also the proper usage of industrial wastes can reduce the problem of disposing the waste products into the atmosphere. Geo-polymer concrete is a concrete in which Portland cement is fully replaced by fly ash and GGBS (Ground granulated blast furnace slag). Geo-polymer concrete is a 'new' material that does not need the presence of Portland cement as a binder. Instead, the source of materials. such as fly ash, that are rich in Silicon (Si) and Aluminum (AI), are activated by alkaline liquids to produce the binder. Hence it is the concrete with no Portland cement.

A Geo - Polymer Concrete by Partial Replacement of Fine Aggregates with Plastic Waste