Infrasense Evaluates Section of Composite Pavement Using Ground Penetrating Radar (GPR) on Interstate in Norfolk, VA

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This summer, Infrasense conducted a ground penetrating radar survey on all lanes, shoulders, and ramps along Interstate I-564 in Norfolk, VA. The project provided the client with comprehensive data on the pavement structure including the thickness of the various pavement layers, and distinguishing sections of composite pavement and full depth asphalt pavement.

Infrasense conducted a ground penetrating radar (GPR) survey and report for 3 miles of Interstate-564, in Norfolk, Virginia. The scope of the survey coverage included 10 lanes, 3 shoulders, and 6 adjoining ramps. All data points were tied into GPS coordinates. The survey was conducted at driving speed with no closures, no disruption to traffic, and zero impact to the integrity of the pavement.

The GPR data collection system included a single 1 GHz horn antenna and a SIR 30 control unit, both manufactured by GSSI in the United States. The project provided the client with pavement layer thicknesses reported at a 5-foot interval with accompanying cross-sectional plots for each lane, shoulder and prescribed ramp on the Interstate. The final report included a statistical summary of the asphalt and concrete layer thicknesses.

GPR layer thickness results are typically compared to core measurements and found to be within 10% on average. The GPR results provide continuous pavement thickness information and with confirmation of core data, provide the client with a comprehensive and accurate picture of the pavement structure.

About Infrasense, Inc.
Since 1987, Infrasense, Inc. has applied advanced technologies to address the most difficult challenges in subsurface scanning. Infrasense's engineers extract critical information using non-destructive methods from a diverse range of structures. In addition to providing ongoing subsurface evaluation services to clients across the country, the firm has also conducted numerous research programs to advance the field of subsurface detection and nondestructive evaluation. To learn more about Infrasense and the services we provide, visit our website:
http://www.infrasense.com

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Lori McCormick
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