Carbonation of concrete is a potentially damaging phenomenon that must be evaluated to ensure durability of a concrete mixture for various construction projects. If reinforced concrete fully carbonates, embedded reinforcing steel would be unprotected and corrosion is likely to ensue. High-Volume Fly Ash Concrete (HVFAC), a “green” alternative to traditional concrete, tends to carbonate significantly faster. With the increased use of cement replacements in “green concrete”, understanding carbonation and the factors that affect its rate of penetration are important for successful designs. This research considered the effect of surface treatments on the rates of carbonation through the exposed surface and will enable comparison of carbonation rates among concrete with the same composition, but different surface treatment. These relationships are a piece of the puzzle to more completely understand carbonation of concrete for the purpose of establishing suitable cover depth to prevent corrosion of rebar within the reinforced concrete.
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