Detecting onset of different types of flaws in reinforced concrete

Eric Garcia, Ece Erdogmus, Michael Schuller, Donald Harvey

Research output: Contribution to journalArticle

Abstract

The experimental results of a novel ultrasonic monitoring method to identify different types of flaws in reinforced concrete are presented. The authors’previous work has demonstrated the ability to use the proposed ultrasonic guided wave leakage (UGWL) to identify the onset of mechanical delamination. This paper presents the results from using the UGWL method to identify chemical delamination (corrosion) and cracking in concrete (other than delamination at the steel-concrete interface) in reinforced concrete. The proposed UGWL method monitors the change in amplitude of ultrasonic waves leaked from a guided wave transmitted through an embedded steel reinforcing bar. The energy of UGWL is influenced by the conditions between the steel reinforcing bar, acting as the waveguide, and the surrounding concrete. This experimental study demonstrated that the UGWL monitoring method is sensitive not only to the onset of delaminations, but also to the development of corrosion activity and cracks.

Original languageEnglish (US)
Pages (from-to)73-82
Number of pages10
JournalACI Materials Journal
Volume116
Issue number1
DOIs
StatePublished - Jan 2019

Keywords

  • Corrosion
  • Cracks
  • Delamination, monitoring
  • Nondestructive testing
  • Reinforced concrete
  • Ultrasonic

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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