The present study investigates the sorptivity of pozzolanic waste-based Alkali Activated Concrete (AAC), without any involvement of Portland cement, reducing carbon-dioxide (CO2) emissions and utilizing industrial waste like fly ash (FA) and Ground granulated blast-furnace slag (GGBS). The primary focus of the investigation is on the development of Plasticized Alkali Activated Concrete, keeping low water content, attempting to appreciate its durability performance in terms of sorptivity as per ASTM. Experimental methods involved using a mix of fly ash, GGBS, alkaline activators, and super-plasticizers. Sorptivity tests were conducted to evaluate durability, showing that primary sorptivity reduces at higher alkali content level, improving water resistance, along with enhanced durability. The ratio of primary sorptivity/ secondary sorptivity, is also considered as a durability indicator. The results of the experimental investigation indicated that the alkali-activated concrete possesses the necessary durability to perform effectively in aggressive environments, making it a reliable choice for challenging conditions.