EVALUATION OF METAKAOLIN-BASED GEOPOLYMER AS A STABILIZING AGENT FOR EXPANSIVE SOIL A thesis presented to the Department of Materials Science and Engineering African University of Science and Technology, Abuja In partial fulfilment of the requirements for the award MASTER OF SCIENCE IN MATERIALS SCIENCE AND ENGINEERING By Ahmed A. Dukuly Supervised by Prof. Azikiwe Peter Onwualu African University of Science and Technology www.aust.edu.ng P.M.B 681, Garki, Abuja F.C.T Nigeria April 2021