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Good sample of efflorescence or crystalline deposit of salts on cement surface; water-soluble salts in material move to surface, moisture evaporates and salts crystallize.
Efflorescence on a red brick wall
Efflorescence or salting on a plaster wall caused by dampness. Rising damp getting between paint and wall surface.
Construction Problem : efflorescence of concrete on platform.
efflorescence, stain on the concrete wall white sediment formed on surfaces with component of cement, orange wall with craking leaking dirty stain

Free stock photosefflorescence (1)