Accelerated protocol for measurement of carbonation through a crack surface

Laura Sullivan-Green*, William Hime, Charles Dowding

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

This paper introduces a method for accelerating experiments to quantify gaseous carbonation of cementitious materials through a sheltered crack surface. To date the majority of measurements of carbonation have focused upon the determination of the carbonation reaction through an open material face with no restriction to gaseous exposure. Experiments to determine the extent of carbonation through a crack surface can verify the extent to which restrictions of gaseous exposure can alter rates of carbonation into the crack surface as well as the depth into the crack to which the reaction occurs. The paper demonstrates that with experimental data the accelerated protocol can produce differences in outcomes in time intervals that are short relative to those in which the reaction occurs naturally. The experiment conducted to demonstrate the viability of the accelerated protocol involved measuring differences in the penetration of carbonation into the crack surface that resulted from differences in crack width. A byproduct of this experiment was a measurement of the depth into the crack (from the material face) to which carbonation occurs. It is not the intent of the paper to develop a theory of rates of carbonation, but rather to demonstrate that statistical differences are obtainable with the accelerated protocol.

Original languageEnglish (US)
Pages (from-to)916-923
Number of pages8
JournalCement and Concrete Research
Volume37
Issue number6
DOIs
StatePublished - Jun 2007

Keywords

  • Acceleration
  • Carbonation
  • Fly ash

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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