1. Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering; Universiti Malaysia Perlis; Arau Perlis 02600 Malaysia
2. Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
3. Faculty of Engineering Technology; Universiti Malaysia Perlis, Kampus UniCITI; S. Chuchuh, Padang Besar Perlis Malaysia
4. Advanced Manufacturing Centre, Faculty of Manufacturing Engineering; Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya; Durian Tunggal Melaka 76100 Malaysia