Coating processes – Restoring or repairing
Patent
1990-03-16
1991-09-17
Beck, Shrive P.
Coating processes
Restoring or repairing
427299, 427136, 4273936, B32B 3500
Patent
active
050494120
ABSTRACT:
A method for realkalizing concrete, layers of which have become carbonated and thus acidified as result of exposure to air of the surface of the concrete. The method presupposes that the concrete still contains adjacent layers that have not yet become carbonated. A substantially water-tight adherent coating is applied to the surface of the concrete that is exposed to air. Thereafter, the concrete is caused to become saturated with water from a source external to the concrete structure, and this condition of saturation is maintained for a period of time sufficient to effect a diffusion of alkaline materials from the relatively less carbonated layers of the concrete into the relatively more carbonated layers thereof. The carbonated layers thus become realkalized, so that further deterioration of the concrete structure is significantly arrested.
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Beck Shrive P.
King Roy V.
Norwegian Concrete Technologies AS
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