Journal
JOURNAL OF ASIAN ARCHITECTURE AND BUILDING ENGINEERING
Volume 13, Issue 1, Pages 217-221Publisher
ARCHITECTURAL INST JAPAN
DOI: 10.3130/jaabe.13.217
Keywords
carbonation; deterioration factor; permeability
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Funding
- Yeungnam University
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Carbonation has been considered as a deterioration factor in concrete because it reduces the pH of concrete from between 12.6 and 13.5 to about 9. However, carbonation can have some positive consequences. Because CaCO3 occupies a greater volume than Ca(OH)(2), which it replaces, the porosity of carbonated concrete decreases. On the other hand, carbonation turns bound chloride into free chloride. The results verify that carbonation has some beneficial effects by enhancing compressive strength and volume safety and reducing permeability and chloride ion penetration. In general, carbonation enhances concrete performance.
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