1. Ph.D. Candidate, Nanotechnology and Catalysis Research Centre, Univ. of Malaya, IPS Bldg., 50603 Kuala Lumpur, Malaysia.
2. Senior Lecturer, Nanotechnology and Catalysis Research Centre, Univ. of Malaya, IPS Bldg., 50603 Kuala Lumpur, Malaysia (corresponding author). ORCID: .
3. Researcher, Dept. of Civil Engineering, Univ. of Malaya, Kuala Lumpur 50603, Malaysia.
4. Senior Lecturer, Civil Engineering Dept., Faculty of Engineering, Komar Univ. of Science and Technology, Sulaymaniyah 46001, Iraq.
5. Associate Professor, Petroleum and Chemical Engineering, Sultan Qaboos Univ., 123 Muscat, Oman.
6. Professor, Dept. of Civil Engineering, Univ. of Malaya, Kuala Lumpur 50603, Malaysia.