The Inspection Method Research on Air Voids of Externally Bonded FRP for Strengthening Concrete Structures

Hai Bin Xu; Zong Cai Deng

doi:10.4028/www.scientific.net/AMM.204-208.2855

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 204-208The Inspection Method Research on Air Voids of...

The Inspection Method Research on Air Voids of Externally Bonded FRP for Strengthening Concrete Structures

Abstract:

Externally bonded FRP for strengthening concrete structures is widely used in concrete structures strengthening field. Many factors affect the strengthening quality, in which delaminations and air voids are two especially important factors. At present the most popular method of inspecting delaminations and air voids is hammer sounding, but this method is slow, the inspection result is easily influenced by the inspector’s experience, and the defect area can’t be measured accurately. In this paper infrared thermal imager is used, according to the inspection results with infrared thermal imager in different conditions, the influence factors to the inspection effect including surface infrared radiation rate, wind, heat source type, heating time and the test environment are analyzed. The research shows that under right conditions using infrared thermal imager to inspecting the delaminations and air voids is a convenient, quick and accurate method.

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Periodical:

Applied Mechanics and Materials (Volumes 204-208)

Pages:

2855-2858

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.204-208.2855

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Online since:

October 2012

Authors:

Hai Bin Xu, Zong Cai Deng

Keywords:

Air Void, Delamination, FRP, Infrared Thermal Imager

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