In this research attempt will be made to propose mix design methodology for high calcium-based alkali activated concrete in a rational way. The activator solution is the costliest item among the raw materials involved in the production of high calcium-based alkali activated concrete. Also, by doing this, flexibility in the design mixes both on the strength requirement and desired activator solution point of view can be rendered. The essential features of the proposed method are the flexibility to select alkali activator solution to binder ratio, sodium silicate to sodium hydroxide solution ratio and sodium hydroxide concentrations required for specific strength and to estimate the probable strength. Mix design and proportioning of alkali-activated fly ash concrete is complex and there is no standard for mix design of this material. In addition, high calcium fly ash is abundance in Thailand. Therefore, the objectives of this research are to develop a mix design procedure to manufacture high calcium-based alkali activated concrete and to perform the parametric studies on setting time, compressive strength, flexural strength, modulus of elasticity, and Poisson ratio of high calcium-based alkali activated concrete.
