Concrete degradation

Concrete degradation may have many different causes. Concrete is mostly damaged by the corrosion of reinforcement bars, the carbonatation of hardened cement paste or chloride attack under wet conditions. Chemical damage is caused by the formation of expansive products produced by chemical reactions, by aggressive chemical species present in groundwater and seawater, or by microorganisms Other damaging processes can also involve calcium leaching by water infiltration, physical phenomena initiating cracks formation and propagation, fire or radiant heat, aggregate expansion, sea water effects, leaching, and erosion by fast-flowing water.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 3.0

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