Laboratory validation of corrosion-induced delamination in concrete by ground penetrating radar

Tin Wai Phoebe Wong, Chi Sun Poon, Wai Lok Lai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper presents the preliminary findings of a laboratory study on using GPR signal to assess concrete delamination induced by rebar corrosion in reinforced concrete structures. A concrete slab was specially designed to produce horizontal cracking between the rebars by an electrochemical method in the laboratory environment, and the corrosion process is monitored by a 2 GHz ground penetrating radar in a time-lapsed manner. Data analysis include the amplitude change and velocity change of the GPR signal measured from the rebars. Both sets of data show that the amplitude of the reflected signal from the rebars are abnormally high by at least 30% in the corroded areas, whereas the travelling velocity does not show significant differences.
Original languageEnglish
Title of host publication2018 17th International Conference on Ground Penetrating Radar, GPR 2018
PublisherIEEE
ISBN (Electronic)9781538657775
ISBN (Print)9781538657782
DOIs
Publication statusPublished - 20 Aug 2018
Event17th International Conference on Ground Penetrating Radar, GPR 2018 - Rapperswil, Switzerland
Duration: 18 Jun 201821 Jun 2018

Publication series

Name2018 17th International Conference on Ground Penetrating Radar, GPR 2018

Conference

Conference17th International Conference on Ground Penetrating Radar, GPR 2018
Country/TerritorySwitzerland
CityRapperswil
Period18/06/1821/06/18

Keywords

  • concrete
  • corrosion
  • delamination
  • ground penetrating radar

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Instrumentation

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