1. Universiti Malaysia Perlis, Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), 01000 Perlis, Malaysia
2. Universiti Malaysia Perlis, Faculty of Chemical Engineering and Technology, Kompleks Pusat Pengajian Jejawi 3, Kawasan Perindustrian Jejawi, 02600, Arau, Perlis, Malaysia
3. Athlone Institute of Technology, Dublin Road, Co. Westmeath , Ireland
4. Universiti Tun Hussein Onn Malaysia, Research Centre for Soft Soil (RECESS), Institute of Integrate d Engineering, 86400 Parit Raja, Johor, Malaysia