A Study on the Fresh and Hardened Properties of Fly-Ash Based Glass Fiber Reinforced Geopolymer Concrete

The production of cement consumes natural resources and lot of energy. Minimization of the use of cement leads to sustainability. This paper is a part of experimental investigation on the behavior of fly ash based Geo-polymer Concrete (GPC) with & with-out alkali resistant glass fibers. The variables of the study include Sodium Silicate to Sodium Hydroxide ratio, Molarities of Sodium Hydroxide (8 M,12 M & 14 M), curing method, curing temperatures (30°C, 60°C & 90°C), curing periods (4, 6 & 8 hours) and Fiber content. Fresh and hardened state properties like workability, density, compressive strength, split tensile strength, flexural strength and modulus of elasticity were studied under elevated temperature and ambient curing conditions. The results show that the mechanical properties of the Geo-Polymer Concrete improve with the increase of molarity of NaOH, Curing time, curing temperature, and Sodium Silicate to sodium hydroxide ratio. The design compressive strength was achieved through ambient curing for one day and the optimum fiber content was arrived at based on the mechanical properties of GPC.