C-scan and L-scan generated images of the concrete/GFRP composite interface

Tribikram Kundu, M. Ehsani, K. I. Maslov, D. Guo

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Glass Fiber Reinforced Plastics (GFRP) are fast becoming a viable new construction material. They are being used for rehabilitating old concrete structures - columns, beams, slabs and walls - by gluing the composite plate to the concrete surface. Proper attachment between the GFRP plate and the concrete surface is necessary for efficient use of GFRP composites to increase the strength of the rehabilitated structures. Delamination between the rehabilitated structure and the GFRP plate significantly reduces the strength of the reinforced structure. Hence, delamination defects, if present at the interface, should be detected as soon as possible. In this paper, two ultrasonic techniques to detect delamination defects between the GFRP plate and the concrete surface are presented. One technique uses longitudinal waves or P-waves and the second technique uses Lamb waves. It is found that both techniques can detect the defect when used properly. However, Lamb waves give a better image quality of the defect than longitudinal waves.

Original languageEnglish (US)
Pages (from-to)61-69
Number of pages9
JournalNDT and E International
Volume32
Issue number2
StatePublished - Mar 1999

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glass fiber reinforced plastics
Glass fiber reinforced plastics
plastic plates
Concretes
composite materials
Delamination
Composite materials
Defects
Lamb waves
longitudinal waves
defects
Surface waves
Gluing
concrete structures
P waves
Concrete construction
Image quality
attachment
slabs
ultrasonics

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering

Cite this

C-scan and L-scan generated images of the concrete/GFRP composite interface. / Kundu, Tribikram; Ehsani, M.; Maslov, K. I.; Guo, D.

In: NDT and E International, Vol. 32, No. 2, 03.1999, p. 61-69.

Research output: Contribution to journalArticle

Kundu, T, Ehsani, M, Maslov, KI & Guo, D 1999, 'C-scan and L-scan generated images of the concrete/GFRP composite interface', NDT and E International, vol. 32, no. 2, pp. 61-69.
Kundu, Tribikram ; Ehsani, M. ; Maslov, K. I. ; Guo, D. / C-scan and L-scan generated images of the concrete/GFRP composite interface. In: NDT and E International. 1999 ; Vol. 32, No. 2. pp. 61-69.
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