1. Asphalt Laboratory, Department of Petroleum Applications, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
2. Chemical Services and Development Center, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
3. Special Application Laboratory, Department of Petroleum Applications, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt
4. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, People’s Republic of China