International Journal of Latest Research in Engineering and Technology (IJLRET) ISSN: 2454-5031 www.ijlret.com || Volume 02 - Issue 08 || August 2016 || PP. 47-50 www.ijlret.com 47 | Page Enhancement of compressive strength of geopolymer concrete by varying ratio of Na 2 Si0 3 / NaoH and by varying molarity of NaoH Miss Urmila Rajaram Kawade 1 , Dr.M.Hussain 2 , Prof. P.A.Shirule 3 PhD Scholar , Department of Civil Engineering , SSBT, COE, Bambhori, North, Maharashtra University , Jalgaon, 1 Prof. & Head, Civil Engineering Department,SSBT’S COET,Jalgaon 2 Assistant Professor, Civil Engineering Department, SSBT’S,COET,Jalgaon 3 Abstract: Global warming is one of the major problem in the world today. Global warming is caused by the environmental pollution. Construction Industries are responsible for environmental pollution as 1 ton production of cements approximately emits one ton of CO 2 into the atmosphere. So, there is need to search for alternative to cement. Geopolymer technology is new innovative technology in the world of concrete technology. In Geopolymer Concrete 100 % replacement of cement is possible with another source material which is rich in silica and alumina . Source material is activated with alkaline activators which act as binders . In present investigation molarity of NaOH is varied from 8M, 10M . Na 2 SiO 3 consisiting of Na 2 O = 15.02%, SiO 2 =,34.01% H 2 O = 50.93% is used. Natural rivner sad having fineness modulus = 3.15 is used as fine aggregate. Combination of Na2Sio3 and NaOH solution is used as alkaline activators. Na 2 SiO 3 /NaOH ratio is kept as 1, 1.5,2. Compressive strength of geopolymer concrete is checked . Keywords: Alkaine Activators , Fly ash, Geopolymer concrete, Na 2 SiO 3 , NaOH I. INTRODUCTION Utilization of concrete as a major construction material is a worldwide phenomenon and the concrete industry is the largest user of natural resources in the world. This use of concrete is driving the massive global production of cement, estimated at over 2.8 billion tones according to recent industry data. Associated with this is the inevitable carbon dioxide emissions estimated to be responsible for 5to 7% of the total global production of carbon dioxide[1]. Significant increases in cement production have been observed and were anticipated to increase due to the massive increase in infrastructure and industrialization in India, China and South America. Demand for concrete as construction material is on the increase and so is the production of cement. In order to address environmental effects associated with. Control of global warming is major concern in today’s life. Geopolymer technology is new innovative technology in the world of concrete technology in which 100 % replacement of cement is possible with another source material which is rich in silica and alumina . Source material is activated with alkaline activators which act as binders. In present investigation molarity of NaOH is varied from 8M, 10M . Na 2 SiO 3 consisting of Na 2 O =15.06% , SiO 2 =34.01% , H 2 O = 50.93% is used. Natural river sand having fineness modulus = 3.15 is used as fine aggregate. Combination of Na2Sio3 and NaOH solution is used as alkaline activators. Na 2 SiO 3 /NaOH ratio is kept as 1, 1.5,2. Compressive strength of geopolymer concrete is checked. II. LITERATURE REVIEW Subhash Patankar et.al.( December 2014 ) [5] suggested Mix Design of Fly Ash Based Geopolymer Concrete. They carried experimental investigation for the gradation of geopolymer concrete and a mix design procedure is proposed on the basis of quantity and fineness of fly ash, quantity of water, grading of fine aggregate, fine to total aggregate ratio. Water-to-geopolymer binder ratio of 0.35, alkaline solution-to-fly ash ratio of 0.35 and sodium silicate-to-sodium hydroxide ratio of1.0 by mass were fixed on the basis of workability and cube compressive strength.Workability of geopolymer concrete was measured by flow table apparatus and cubes of 150mm side were cast and tested for compressive strength after specified period ofoven heating. The temperature of oven heating was maintained at 60 °C for 24 h duration. According to them the results of workability and compressive strength are well match with the required degree of workability and compressive strength. B. Vijaya Rangan ( April 2014) conducted study on fly ash based geopolymer concrete. Salient factors that influence the properties of the geopolymer concrete in the fresh and hardened states are identified. Test data of various short-term and long-term properties of the geopolymer concrete are then presented. The paper describes the results of the tests conducted on large-scale reinforced geopolymer concrete members and