A novel approach for near-surface defect detection in FRP-bonded concrete systems using laser reflection and acoustic-laser techniques

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

31 Scopus Citations
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Original languageEnglish
Pages (from-to)553-564
Journal / PublicationConstruction and Building Materials
Online published15 Mar 2017
Publication statusPublished - 15 Jun 2017


Two different methods (i.e. laser reflection and acoustic-laser techniques) for defect detection in fiber-reinforced polymer bonded concrete systems are studied. Both the simulation and experimental results demonstrate that laser reflection technique can instantly and economically identify the presence of defect but cannot quantify the defect size. In contrast, acoustic-laser technique is more sophisticated to be used and it enables a reliable measurement of the defect size. A new and economical detection scheme combining these two techniques is established so that a single or multiple defect region can be rapidly recognized by laser reflection technique and the defect size can be predicted by acoustic-laser technique.

Research Area(s)

  • Acoustic-laser technique, Concrete, Defect detection, Fiber-reinforced polymer, Laser reflection technique