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Effect of extraction solutions on carbonation of cementitious materials in aqueous solutions
- Authors
- Jo, Hwanju; Jo, Ho Young; Jang, Young-Nam
- Issue Date
- 2012
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- carbon dioxide; global warming; carbonation; cementitious materials
- Citation
- ENVIRONMENTAL TECHNOLOGY, v.33, no.12, pp.1391 - 1401
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENVIRONMENTAL TECHNOLOGY
- Volume
- 33
- Number
- 12
- Start Page
- 1391
- End Page
- 1401
- ISSN
- 0959-3330
- 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, CH3COOH, NH4Cl 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, NH4Cl 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.
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