Minnesota Department of Transportation

511 Travel Info

Technology Transfer Showcase


Orange barrels on a highway

Technology Transfer Showcase

New Tools for HMA Pavement Analysis

Non-Contact Seismic Lamb Wave Measurement of Pavement Structure using Laser Array
April 3, 2018
10:30 a.m. – Noon (CDT)

Join Skype Meeting        (We recommend using headphones or a headset to access the audio portion of the webinar through your computer)
Trouble Joining? Try Skype Web App

Presented by: Roohollah (Radwin) Askari, Assistant Professor,
Department of Geological and Mining Engineering and Sciences
Michigan Technological University

Full webinar description (PDF)

"We propose a novel non-contact seismic Lamb wave measurement using laser array to estimate the elastic properties and thicknesses of asphalt concrete (AC) pavement systems. Compared to the conventional techniques such as Falling Weight Deflectometer (FWD), our method provides higher resolution, more stability in back-calculation, and in particular, faster data acquisition. Using high frequency Lamb waves, we can distinguish some fine structures in pavements such as delamination. In addition, our fast data acquisition technique is mobile. In other words, unlike FWD, we do not have to stop the acquisition vehicle and block traffic for data collection."