Infrasense Evaluates Minnesota Interstate Bridge Decks using Ground…

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IR and GPR Vehicle Setup

analysis resulted in quantities and maps of concrete deterioration, rebar-level delamination, patching, spalling, and rebar cover

Infrasense recently evaluated the condition of 17 bridge decks located along Interstate 35 in Minnesota. The deck evaluations were carried out using vehicle-based ground penetrating radar (GPR), infrared thermography (IR), and high-resolution video (HRV) equipment operated at driving speeds. The GPR method was carried out according to ASTM specification D6087-08 and the IR/HRV surveys were carried out according to ASTM D 4788 – 03.

Following the field surveys, the data is transferred to Infrasense’s headquarters in Woburn, Massachusetts for quality assurance (QA) review, analysis, and reporting. The analysis is completed with the support of internally developed proprietary software. The software is specifically catered to the analysis of GPR, infrared and visual data for bridge deck and pavement applications. For the Minnesota bridge deck evaluations, the analysis resulted in quantities and maps of concrete deterioration, rebar-level delamination, patching, spalling, and rebar cover. These results are delivered in a comprehensive report with descriptions of the data collection procedures, equipment, analysis methods, and results obtained.

This past year, Infrasense evaluated the condition of nearly 15 million SF or bridge decks including nondestructive testing of decks in Alaska, Connecticut, Georgia, Illinois, Indiana, Massachusetts, Maryland, Montana, North Dakota, New York, South Carolina, Texas, Virginia, and Wisconsin. Infrasense methods have addressed a variety of bridge structure types, including asphalt, concrete, and epoxy overlays, stay-in-place forms, slab on girders, one-way slabs, and box girders. Infrasense bridge deck projects have analyzed structures ranging in size from small 20-foot long stream crossings to major river crossings and viaducts up to 3 miles in length.

About Infrasense, Inc.

Since 1987, Infrasense, Inc. has applied advanced technologies to address the most difficult challenges in subsurface scanning. Infrasense 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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