Effect of Lime and Fly Ash on the Strength of Cement Composite Mortar

Different proportions of lime and fly ash mortars were analysed against increasing percentages of fly ash, lime as a replacement of cement, and water-to-cement lime-fly ash ratios at various ages. The study was carried out to determine the maximum permissible fly ash content and the optimum water-to-lime-fly ash ratio in order to attain required strength levels at specific ages. The study examined the variation in strength with the gradual increase in fly ash quantities to cement-lime mortars. The addition of 7.5% to 22.5% of fly ash and 2.25% to 6.75% of lime in cement mortars can increase overall mortar strength.