Concrete delaminations location and its severity detection by visual inspection and ground penetrating radar

A. M. Shamsudin, S. F. Senin, Roszilah Hamid, K. Yusuf

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Concrete delamination is a problem commonly found in reinforced concrete bridge deck and may cause severe damage to the structural component. The need to access the severity of this defect is pertinent as the detachment of the concrete cover from the rebar is invisible and only showing when cracks and spalling had reached the top of asphalt layer. Most of the bridge inspections on concrete delamination rely on human interpretation based on visual inspection (VI). VI is a very subjective assessment and should be conducted by highly trained bridge inspectors. It is also a time consuming method. Alternatively, Ground Penetrating Radar (GPR) is a rapid and nondestructive method to detect rebar delaminations within the bridge deck and quantify this defect based on the reflection of electromagnetic waves by the air void within the delamination. Therefore, VI and GPR method were employed at a case study site to detect the location of the delamination and to estimate the extent of its severity. Based on the VI result, the delamination was detected in almost of deck area where 8.7 m and 9.5 m length was observed at area A1 and A8, respectively. Meanwhile, through GPR, delaminations were measured at 4 different areas (A1, A4, A7 and A8) with coverage of 8.5 m, 5.2 m, 4.1 m and 6.4 m respectively. GPR had confirmed the existence of delamination at A1 and A8 and further had detected size of delaminated area at A4 and A7. The differences of delamination extent detected by both methods are 2.3% at A1 and 32.6% at A8. GPR has shown better capability in detecting size and location of hidden delaminated area under asphalt layer of a bridge deck which is very useful in maintenance decision.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalJournal of Engineering Science and Technology
Volume10
Issue numberSpec. Issue on 4th International Technical Conference (ITC) 2014
Publication statusPublished - 2015

Fingerprint

Delamination
Radar
Inspection
Concretes
Bridge decks
Asphalt
Defects
Spalling
Concrete bridges
Electromagnetic waves
Reinforced concrete
Cracks
Air

Keywords

  • Bridge inspection
  • Delamination
  • GPR
  • Location and severity
  • Visual inspection

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Shamsudin, A. M., Senin, S. F., Hamid, R., & Yusuf, K. (2015). Concrete delaminations location and its severity detection by visual inspection and ground penetrating radar. Journal of Engineering Science and Technology, 10(Spec. Issue on 4th International Technical Conference (ITC) 2014), 1-12.

Concrete delaminations location and its severity detection by visual inspection and ground penetrating radar. / Shamsudin, A. M.; Senin, S. F.; Hamid, Roszilah; Yusuf, K.

In: Journal of Engineering Science and Technology, Vol. 10, No. Spec. Issue on 4th International Technical Conference (ITC) 2014, 2015, p. 1-12.

Research output: Contribution to journalArticle

Shamsudin, AM, Senin, SF, Hamid, R & Yusuf, K 2015, 'Concrete delaminations location and its severity detection by visual inspection and ground penetrating radar', Journal of Engineering Science and Technology, vol. 10, no. Spec. Issue on 4th International Technical Conference (ITC) 2014, pp. 1-12.
Shamsudin AM, Senin SF, Hamid R, Yusuf K. Concrete delaminations location and its severity detection by visual inspection and ground penetrating radar. Journal of Engineering Science and Technology. 2015;10(Spec. Issue on 4th International Technical Conference (ITC) 2014):1-12.
Shamsudin, A. M. ; Senin, S. F. ; Hamid, Roszilah ; Yusuf, K. / Concrete delaminations location and its severity detection by visual inspection and ground penetrating radar. In: Journal of Engineering Science and Technology. 2015 ; Vol. 10, No. Spec. Issue on 4th International Technical Conference (ITC) 2014. pp. 1-12.
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