What are good references on how to repair concrete for spalling? I am currently doing a project where 8" square pedestals have spalled. In some cases the rebar is exposed and have corrosion. Is spalling repair a good idea? I at first submitted a design for complete replacement but the cost was too high.
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Concrete spalling
- Thread starter wailuku
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Spalling is caused by inadequate cover to reinforcement, which leads to corrosion. The products of corrosion occupy more volume than the steel, thus the oxides push the concrete away. 8" square pedestals are very small for structural concrete, therefore the reinforcement has little cover. Repair of these will likely be fruitless, resulting in repeat failures. Suggest you rethink and replace the pedestals, doing it right this time.
SkiisAndBikes
Structural
I agree with hokie66 and Ron that for small elements, replacement is ususally more cost effective in the long run. For future reference, there is a lot of information on concrete repair techniques at the IRCI website (irci.org).
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