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A Study on the pH Value Changes of Blended Cement Paste according to the carbonation
- Authors
- Lee, Sanghyun; Lee,Hanseung
- Issue Date
- Jul-2008
- Publisher
- Trans Tech Publications Ltd.
- Keywords
- Carbonation; Ca(OH)(2); quantitative analysis; blast furnace slag; pH value
- Citation
- Key Engineering Materials, v.385, no.1, pp 625 - 628
- Pages
- 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- Key Engineering Materials
- Volume
- 385
- Number
- 1
- Start Page
- 625
- End Page
- 628
- ISSN
- 1013-9826
1662-9795
- Abstract
- Life span of structures made with concrete was shortened by carbonation. This phenomenon makes pH in concrete lower. If pH value in concrete become below 10, rebar in concrete begin to be corroded. This pH value was effected by quantity of Ca(OH)(2) that depends on cement types, hydration reaction and carbonation time. In this study, pH value and quantity of Ca(OH)(2) in mortar which has blast furnace slag were tested according to hydration and carbonation time. As a test result, the more cement has blast furnace slag (BFS) and the longer carbonation time last, the lower pH value in mortar has. And using this quantitative analysis result of pH and Ca(OH)(2), it may be used effectively when service life considering carbonation is predicted using FEMA.
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Related Researcher
- Lee, Han Seung
- ERICA 공학대학 (MAJOR IN ARCHITECTURAL ENGINEERING)