Air void analysis of hardened concrete by means of photogrammetry

Sofie Wolter, Frederik Alexander Hvelplund Uhre, Marianne Tange Hasholt*, Vedrana Andersen Dahl, François Anton

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The present study investigates the use of close-range photogrammetry for automated air void analysis of hardened concrete without contrast enhancement. First, polished plane sections of concrete with varying air contents were analyzed by photogrammetry. The data in the form of point clouds were processed to identify the air voids. Second, the same plane sections were subjected to traditional air void analysis by contrast enhancement. Results of both methods were compared. The method based on photogrammetry showed potential, but it could not capture the smallest air voids. Better camera resolution and/or methods to reduce noise in the point cloud are needed.
Original languageEnglish
JournalConstruction and Building Materials
Volume226
Pages (from-to)953-964
ISSN0950-0618
DOIs
Publication statusPublished - 2019

Keywords

  • Concrete
  • Air void analysis
  • Photogrammetry
  • Image analysis

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