Nondestructive techniques for studying fracture processes in concrete

Surendra P Shah*, S. Choi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Some laboratory nondestructive evaluation techniques have been invaluable in studying fracture processes in concrete. Several nondestructive evaluation methods including acoustic emission (AE), computer vision, digital speckle pattern interferometry (DSPI), and X-ray microtomography (XMT) were used to examine the fracture behavior of concrete in tension and compression. Acoustic emission testing was used in an attempt to characterize the fracture properties of individual microcracks. As the specimens were loaded, AE waveform data was recorded, and analyzed for source location and source characterization. While DSPI analysis is limited to the specimen surface, the resolution is detailed such that microcracks on the order of 0.25 μm can be detected. Computer vision is a very useful method to measure crack openings for multiple crack development. It also can be used in conjunction with a hydraulic testing machine, which often generates vibration problem for some sensitive techniques. Crack patterns in cement-based materials under various material compositions and testing conditions are examined.

Original languageEnglish (US)
Pages (from-to)351-359
Number of pages9
JournalInternational Journal of Fracture
Volume98
Issue number3-4
StatePublished - Dec 1 1999

Keywords

  • Acoustic emission
  • Computer vision
  • Concrete fracture
  • Digital speckle pattern interferometry
  • Microtomography

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials

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