An image analysis procedure to quantify the air void system of mortar and concrete

P. C. Fonseca, G. W. Scherer

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The entrained air void system in cement paste and concrete directly affects both the fresh-state workability and the freeze-thaw durability of concrete pavements and structures. In order to effectively study the air void system, the volume, spacing, and size distribution of the air bubbles must be quantified. This manuscript describes an inexpensive and effective procedure to quantify the air void system using automatic image analysis. We compare various materials used for sample preparation and recommend a procedure to create more accurate images. We further implement a stereological analysis method in the form of a user-friendly and customizable Matlab script. The script was verified by comparing bulk density measurements between air-entrained and control samples with the air content computed by image analysis. As a result, the user can quantify the air void system in a variety of samples by computing the air content, specific surface, spacing, and size distribution of the bubbles.

Original languageEnglish (US)
Pages (from-to)3087-3098
Number of pages12
JournalMaterials and Structures/Materiaux et Constructions
Volume48
Issue number10
DOIs
StatePublished - Oct 19 2015

All Science Journal Classification (ASJC) codes

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

Keywords

  • Air content
  • Air voids
  • Bubbles
  • Image analysis
  • Stereology

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