Impact in Mineralogical Composition of Geopolymerization Actuation using Fly Ash as the Sole Binder

The use of large amounts of cement quantity to increase in carbon dioxide emissions in the world and hence an alternative binding material is required for a sustainable development. The utilization of alumina silicate materials to mostly replace cement content or creation of geopolymer concrete is a noteworthy improvement towards the gainful utilization of modern waste items. Alumino silicates, for example, fly ash, blast furnace slag and metakaolin can be actuated utilizing soluble arrangements of hydroxide and silicates of Sodium or potassium to deliver cement free binders. In this experimental study, Geopolymer mortar specimens were prepared with fly ash and activated with NaOH 6M and 8M solution. Effect of particle size of raw flyash (RFA), particles sized less than 45 μsieved fly ash (SFA) concentration of NaOH (6M, 8M) and varying curing methods and temperatures are curing at ambient temperature, oven curing at 60◦ C, 80◦ C, Steam Curing at 60◦ C, 80◦ C were the parameters considered. The RFA mortar specimens casted with 8M NaOH solution utilizing normal Curing indicates 12% more compressive strength compared to mortar samples activated with 6M NaOH solution. The SFA mortar specimensshows 5% increase in compressive strength under the same conditions implying the effect of particle size on the compressive strength development. Specimens prepared with 45μ sieved fly ash developed higher strength compared to specimens prepared with raw fly ash. In the present study there is a particular instance of a conceivable modern use of these new materials in the segment of precast industry.