Chemical Engineering @ChemengFiles.Com

The phenomenon of concrete carbonation is a very worrying given the serious consequences that may result, resulting from corrosion of reinforcement responsible for sustaining the structures of buildings. While there are various factors that influence the corrosion of reinforcing steel (oxygen, moisture, pH, etc.) Massive release of CO2 into the atmosphere plays a dominant role in the electrolytic connection for the activation of destructive process.

While calcium hydroxide, sodium and potassium, dissolved in the aqueous component of concrete, are responsible for the high pH which acts as a shield of steel, when the CO2 enters the concrete is a reaction between the liquid phase hydroxides interstitial hydrated cement compounds, so that when all the Ca (OH) 2, Na (OH) and K (OH) present in the pores have been carbonate, the pH begins to decrease, resulting in an acidic environment that produces a steady and progressive corrosive effect on steel.

The phenomenon of concrete carbonation is a very worrying given the serious consequences that may result, resulting from corrosion of reinforcement responsible for sustaining the structures of buildings. While there are various factors that influence the corrosion of reinforcing steel (oxygen, moisture, pH, etc.) Massive release of CO2 into the atmosphere plays a dominant role in the electrolytic connection for the activation of destructive process.

While calcium hydroxide, sodium and potassium, dissolved in the aqueous component of concrete, are responsible for the high pH which acts as a shield of steel, when the CO2 enters the concrete is a reaction between the liquid phase hydroxides interstitial hydrated cement compounds, so that when all the Ca (OH) 2, Na (OH) and K (OH) present in the pores have been carbonate, the pH begins to decrease, resulting in an acidic environment that produces a steady and progressive corrosive effect on steel.