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Current practice sheet no. 131: Measuring the depth of carbonation
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Concrete
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January 1, 2003
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Copyright informationCopyright The Concrete Society Jan 2003. Provided by ProQuest LLC. (Hide copyright information)
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Introduction
The measurement of carbonation depth and of chloride ion concentration in the cover zone are two standard procedures in assessing reinforced concrete deterioration, particularly in respect of reinforcement corrosion problems. This Current Practice Sheet considers carbonation depth; chloride ion concentration is considered in a forthcoming Current Practice Sheet.
Carbonation
Carbonation is the progressive neutralisation of the alkali in the concrete cover by acidic gases from external sources - mainly carbon dioxide from the atmosphere. This reacts with the alkaline calcium hydroxide present in the cement matrix. In sound alkaline concrete, a protective layer, or passive ...
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