报告摘要：

Ground penetrating radar (GPR) is a nondestructive testing tool which is based on the transmission of electromagnetic waves. When applied appropriately, it can provide the condition data of transportation infrastructure in a nondestructive, accurate, continuous and rapid way. This presentation starts with the introduction to the system components and working mechanism of GPR. Then, its practical applications in pavement layer thickness measurement, in-situ asphalt pavement density monitoring, and railroad ballast fouling detection are presented. In the end, both the advantages and limitations of using GPR as a nondestructive tool are discussed.

Short Bio

Dr. Zhen Leng is a Professor, the Director of the Road Research Laboratory, and the Associate Director of the Research Centre for Resources Engineering towards Carbon Neutrality at The Hong Kong Polytechnic University. He received his Ph.D. degree in Civil Engineering from University of Illinois at Urbana-Champaign, and B.Eng. and M.Eng. degrees from Southeast University. His research interests mainly include sustainable and smart pavement materials and technologies, and nondestructive evaluation of transportation infrastructure. He has served as the President of ASCE Greater China Section(2021-2022), the President of Academy of Pavement Science and Engineering (2023-2025),aCouncil Member of the Hong Kong Institution of Highways and Transportation, a Director of the International Association of Chinese Infrastructure Professionals, an Executive Board Member of the Hong Kong Society for Transportation Studies, and the Chair of the Asphalt Pavement Discipline of World Transport Convention. He is also the founding Editor-in-Chief ofJournal of Cleaner Materials, an Executive Editor ofJournal of Cleaner Production, an Associate Editor of ASCEJournal of Materials in Civil Engineering,andJournal of Transportation Engineering, Part B: Pavements, and an Editorial Board Member ofRoad Materials and Pavement Design,TransportationResearch,Part D：Transport and Environment,andChina Journal of Highway and Transport.