Microwave-assisted sodium hydroxide activation: revolutionizing eco-friendly cement production

This research investigates an innovative method for producing environmentally friendly one-part geopolymer cement using microwave-induced sodium hydroxide activation. The primary objective is to evaluate the feasibility of combining pozzolanic carriers with an activator (sodium hydroxide) through microwave technology, aiming to enhance production efficiency and sustainability. Comprehensive chemical analyses were conducted, revealing that slag serves as the most effective precursor, with microwave treatment significantly accelerating strength development. The study demonstrates that different carrier materials influence compressive strength differently. Notably, blends of slag with fly ash achieved the highest compressive strength gains within the first 7 days, while combinations of kaolin and slag exhibited the greatest improvements between days 14 and 28. Additionally, a blend of rice husk ash (RHA) and slag was identified as a promising option for attaining high compressive strength in geopolymer composites. The innovation of this research lies in its application of microwave technology to facilitate the activation process, thereby optimizing the geopolymerization reaction and enhancing material performance. Furthermore, the study highlights the importance of selecting suitable precursor and carrier materials for achieving optimal compressive strength. In conclusion, this research underscores the potential of microwave-induced sodium hydroxide activation in promoting sustainable cement production. It encourages further exploration of the interactions between RHA, slag, the activator, and the resulting gel constituents, ultimately aiming to develop more efficient and eco-friendly construction materials that contribute to sustainable practices in the industry.