Multi-storey car parks
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Essentially, carbon dioxide in the atmosphere reacts with cement hydrates to form calcium carbonate. The process lowers the alkalinity of the concrete, which then leads to the depassivation of the steel reinforcement. Corrosion does not necessarily follow, but depassified steel is certainly at risk of corrosion given exposure to moisture...Explore the subscription options here to get full access to isurv, including downloads.
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