Omar A. Abdulkareem1a, A.M. Mustafa Al Bakri1b, H. Kamarudin1c, and I. Khairul Nizar2d 1Center of Excellence Geopolymer System Research, School of Material Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, Kangar, Perlis, 01000, Malaysia. 2School of Environmental Engineering, Universiti Malaysia Perlis (UniMAP), Box 77, D/A Pejabat Pos Besar, Kangar, Perlis, 01000, Malaysia. [email protected],[email protected], [email protected], [email protected]. Keywords: curing periods, geopolymerization, alkaline activator, compressive strength, fly ash.