• Prathil Kumar TL
• Chinnu Mariam Ninan
• Ramaswamy KP

The aim of the study is to investigate the creation and functionality of alkali activated concrete (AAC) that contains ground granulated blast furnace slag (GGBFS) and ilmenite mud as precursors, with the usage of lightweight ex-panded clay aggregate (LECA) as a partial replacement of coarse aggregates. LECA is a lightweight and insulating material, used to lower the density of the concrete without compromising strength. The goal of integrating these materials is to create high-performing, environmentally friendly concrete. In keeping with the concepts of sustainable building, the use of GGBFS and il-menite mud not only reduces landfill, but also lowers the need for raw natu-ral resources. In this study, combination of sodium silicate and 12 M sodium hydroxide is used as the activator solution. The present study adopts an acti-vator modulus (Ms) of 1.5, water/binder ratio of 0.45, Na2O/binder ratio of 6 %. In this paper, compressive strength and ultrasonic pulse velocity of LECA-infused alkali activated concrete is tested. The study reports 10 % LECA as the optimum for obtaining maximum compressive strength and ul-trasonic pulse velocity. Based on the preliminary findings, the combination of ilmenite mud, GGBFS, and LECA produces a composite material that has satisfactory mechanical qualities. By demonstrating the potential of AAC with GGBFS, ilmenite mud, and LECA as a workable substitute for conven-tional concrete for ecologically aware construction methods, this study adds to the expanding research on sustainable building materials

Alkali activated concrete, slag, ilmenite mud, LECA.

"A Study on Alkali-Activated Concrete with Ilmenite Mud, Slag and Lightweight Expanded Clay Aggregates", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 8, page no.c432-c436, August-2025, Available :http://www.jetir.org/papers/JETIR2508260.pdf

"A Study on Alkali-Activated Concrete with Ilmenite Mud, Slag and Lightweight Expanded Clay Aggregates", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 8, page no. ppc432-c436, August-2025, Available at : http://www.jetir.org/papers/JETIR2508260.pdf