IMPACT PERFORMANCE OF STEEL FIBRE REINFORCED GEOPOLYMER CONCRETE

Construction industry has come out with new emerging cementless material geopolymer concrete which utilizes industrial by-products such as fly ash, slag, meta kaolin bagasse ash, rice ask ash and son on by replacing cement completely. Application of geopolymer concrete for various civil engineering structures indirectly reduces the manufacture of cement to certain extent thus by reducing the CO2 emission. In the present research fly ash (FA) and ground granulated blast furnace slag (GGBS) were used as supplementary cementitious materials with lower concentration of 5 molar sodium hydroxide alkaline solutions. The desired target is in the range 30 MPa to 40 MPa for ambient air cured temperature. The desired compressive strength at 3rd day, 7 th day and 28th day were tested and the tensile strength at 28th day is also checked. The main focus of this study is to find out the impact energy for medium strength geopolymer concrete. As per the results, early strength gain of geopolymer concrete finds its application in the pavements, drainage covers and industrial floorings helps to early stripping of the form work. Crimped steel fibers were used in the mixes enhances the certain properties of concrete. The entire study is compared for both river sand and crushed stone sand as fine aggregates.