1. Universiti Malaysia Perlis, Center of Excellence Geopolymer & Green Technology (CEGeoGTech), School of Materials Engineering, (UniMAP), 02600 Jalan Kangar-Arau, Perlis, Malaysia
2. Universiti Malaysia Perlis, (UniMAP), Faculty of Mechanical Engineering Technology, Perlis, Malaysia
3. Universiti Malaysia Terengganu, Faculty of Ocean Engineering Technology and Informatic, 21030 Kuala Nerus, Terengganu Darul Iman, Malaysia
4. Universiti Malaysia Perlis, (UniMAP), Faculty of Chemical Engineering Technology, 02600 Jalan Kangar-Arau, Perlis, Malaysia
5. Sriwijaya University, Civil Engineering Department, Faculty of Engineering, Indonesia