Shear Strength of Fly Ash Based Geopolymer Concrete

Abstract: This paper present an experimental investigation of geopolymer concrete. Cement is one of the most important construction material. Cement is a backbone of civil engineering work. Development of whole world depends upon increasing infrastructure. For which cement is very necessary. Manufacturing of cement produce huge amount of carbon di-oxide and other greenhouse gases which is hazardous to the environment causes pollution. Hence it is very necessary to develop alternative binding material instead of cement for construction. Many researchers contribute their work on replacement of cement in concrete. Now a day’s various researchers contribute their research for using industrial waste instead of cement in concrete such as fly ash, Ground granulated blast furnace slag (GGBS) which form a geo-polymer concrete by adding alkaline material such as sodium silicate and sodium hydroxide. For design purpose shear strength is very important for any type of concrete because shear strength is very ductile in nature. So many researchers work on compressive strength, tensile strength, etc. but very few study is available on shear strength of fly ash geo-polymer concrete. Fly ash based geo-polymer concrete require elevated temperature for curing to improve strength properties and it impossible on actual site. In this project we can prepare fly ash based geopolymer concrete at ambient temperature curing by adding percentage of GGBS with fly ash to improve strength of concrete and obtained compressive strength and shear strength. From the result compressive strength and shear strength of concrete increases with increasing GGBS content with percentage of fly ash. Compressive strength of concrete at 28 days in ambient curing obtained is 9.88 Mpa, 31.10 Mpa, 33.15 Mpa, 35.27 Mpa and 41.07 Mpa for percentage replacement of GGBS with fly ash is 00%, 20%, 40%, 60% and 80% respectively and shear strength obtained is 0.59 Mpa, 1.14 Mpa, 1.18 Mpa, 1.23 Mpa and 1.34 Mpa for percentage replacement of GGBS with fly ash is 00%, 20%, 40%, 60% and 80% respectively. From above result it will be say that fly ash based geopolymer concrete may be used for construction purpose