Infrasense recently evaluated two bridge decks that make up a large viaduct carrying a major highway near Hartford, CT. A high-speed ground penetrating radar (GPR) survey vehicle was used to collect data without disrupting traffic. A limited number of cores were obtained at locations based on a preliminary analysis of the GPR data. The core data was used for finalizing the GPR deterioration quantities and maps.
HARTFORD, Conn., Nov. 27, 2024 /PRNewswire-PRWeb/ — Infrasense was recently tasked with evaluating the condition of two bridge decks that carry traffic on a major highway near Hartford, Connecticut. The deck condition evaluations were carried out using a ground penetrating radar (GPR) vehicle system with multiple high frequency air-launched antennas. A distance measuring instrument (DMI) triggered the GPR data collection at a rate of 4 scans per foot of travel. The GPR data was also collected with synchronous high-resolution GPS data for accurate geospatial condition mapping.
The GPR dataset was analyzed to quantify and map concrete deterioration, as well as concrete cover over rebar. The calculated results of each line of the GPR data were combined to create a plan area plot showing locations of deteriorated areas. Also provided was a rebar depth plot, generated through the same calculation process. The initial deterioration maps were used to identify proposed locations for coring and concrete sampling for compressive strength and chloride concentration content testing, respectively. The chloride testing results were used to refine and finalize the GPR deterioration quantities and maps.
In addition to ground penetrating radar (GPR), Infrasense uses a suite of other nondestructive evaluation (NDE) methods for assessing the condition of bridge decks including infrared thermography (IR), high-resolution video (HRV), impact-echo (IE), and acoustic scanning. The specific method(s) selected for each deck condition evaluation are based on the prescribed conditions to be detected, structural composition of the bridge deck (and overlay), and environmental conditions.
About Infrasense, Inc.
Since 1987, Infrasense, Inc. has applied advanced technologies to address the most difficult challenges in subsurface scanning. Infrasense’s engineers nondestructively extract critical information 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.
Media Contact
Lily Strickler, Infrasense, Inc., 781-281-1686, info@infrasense.com, http://www.infrasense.com
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SOURCE Infrasense, Inc.
