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405 N. St. Mary’s St., Suite 242  San Antonio, TX 78240 Phone: (210) 422-6116 Email: mvlconcrete@yahoo.com 
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Spalling concrete is one of the worst things that can happen to reinforced concrete because of its capabilities of spreading threw the structure. Spalling concrete  happens when the rebar is corroded by salt (chloride penetration) or by carbon dioxide in the air (carbonation). Once the rebar beings to rust, it will start to produce a hard coating enlarging the rebar creating stress on the concrete. This is why in the later stages you will see a piece of concrete about to break.   It doesn’t matter where the spalling is occuring; whether it is in a parking garage, water tank, or to a bridge the most important first step is to determine if the corrosion is caused by chloride penetration or carbonation. This will determine how the concrete is repaired. After we have determined how the rebar is corroding, the next step in the repair process is to remove the weak concrete by either demo-hammers or more preferable hydro-demolition. It is very important not to damage the existing rebar in the concrete. Once we have the rebar exposed we will clean the rust off of them and prime the surface to help reduce future corrosion. Shortly after we can replace the area with modified cement.

Spalling Concrete Repair

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