Pavement Thickness Evaluation Using 3D Ground Penetrating RadarStatus: CompleteReport Date: 07/27/2021 Summary: MnDOT assesses pavement thickness to select the best methods for maintaining asphalt roadways. Historically, the agency has extracted pavement core samples to determine thickness—an expensive, destructive process that gathers limited data specific to the area and requires immediate repair of the site. Researchers investigated the use of 3D ground-penetrating radar (GPR) as a means to obtain better and larger data sets about pavement thickness. An array of up to 121 transmitting and receiving antenna pairs attached to a van can gather data at traffic speed. Data is then loaded into a new software tool for complex calculations resulting in pavement thickness data. When put to use, this process will save time and money, reducing the need for core extraction as a data gathering process for pavement maintenance. Final Deliverables: Pavement Thickness Evaluation Using 3D Ground Penetrating Radar (Report #2021-19) Evaluating Pavement Thickness With 3D Ground-Penetrating Radar (Research Summary) Related Materials: Evaluating Pavement Thickness With 3D Ground-Penetrating Radar (Blog Post) Related Research: Project Personnel: Principal Investigator: Lev Khazanovich Technical Liaison: Shongtao Dai Project Coordinator: David Glyer Panel Members: Christine Dulian - District 6 Eyoab Zegeye - Materials & Road Research Kyle Hoegh - Metro District Steven Henrichs - Materials & Road Research Timothy Andersen - Materials & Road Research
