Evaluation of Bond Retainage in Portland Cement Concrete Overlays by Infrared Thermography and Ground Penetrating Radar, HR-537, 1988

(1988) Evaluation of Bond Retainage in Portland Cement Concrete Overlays by Infrared Thermography and Ground Penetrating Radar, HR-537, 1988. Transportation, Department of

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Abstract

The purpose of this project was to evaluate the location and quantities of debonding in selected portland cement concrete (PCC) overlays. The project entailed an infrared thermographic survey and a ground penetrating radar survey of the PCC overlays to locate areas of debonding between the overlays and the original pavement. An infrared scanner is capable of locating these areas because of the temperature differential which is established between bonded and debonded areas under certain environmental conditions. A conventional video inspection of the top surface of the pavement was also completed in conjunction with the infrared thermographic survey to record the visual condition of the pavement surface. The ground penetrating radar system is capable of locating areas of debonding by detecting return wave forms generated by changes in the dielectric properties at the PCC overlay original pavement interface. This report consists of two parts; a text and a set of plan sheets. The text summarizes the procedures, analyses and conclusions of the investigation. The plan sheets locate specific areas of debonding, as identified through field observations.

Item Type: Departmental Report
Keywords: Concrete, Concrete overlays, Deterioration, Highways, Highway safety, Overlays (Pavements), Portland cement concrete, Rehabilitation (Maintenance), Structural deterioration and defects
Subjects: Transportation > Pavements
Transportation
Transportation > Materials
Transportation > Bridges and tunnels
Transportation > Roads and highways
Transportation > Research
Transportation > Maintenance and preservation
ID Code: 22504
Deposited By: Iowa DOT Library
Deposited On: 26 Jul 2016 12:36
Last Modified: 26 Jul 2016 12:36
URI: http://publications.iowa.gov/id/eprint/22504