Effect of extraction solutions on carbonation of cementitious materials in aqueous solutions

Hwanju Jo, Ho Young Jo, Young Nam Jang

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7 Citations (Scopus)

Abstract

Carbonation efficiency was evaluated for three cementitious materials having different CaO-bearing minerals (lime, Portland cement and waste concrete) using various extraction reagents (HCl, CH 3COOH, NH 4Cl and deionized water). The cementitious materials were subjected to Ca extraction and carbonation tests under ambient pressure and temperature conditions. The Ca extraction efficiency generally decreased in the order lime, Portland cement and waste concrete, regardless of the extraction solution. Among the extraction solutions, NH 4Cl was the most effective for Ca extraction and carbonation. The results of this study suggest that the types of extraction solution and CaO-bearing mineral of the materials are primary factors affecting carbonation efficiency.

Original languageEnglish
Pages (from-to)1391-1401
Number of pages11
JournalEnvironmental Technology (United Kingdom)
Volume33
Issue number12
DOIs
Publication statusPublished - 2012 Jun 1

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Keywords

  • Carbon dioxide
  • Carbonation
  • Cementitious materials
  • Global warming

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Water Science and Technology

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