UFC 4-150-07
19 June 2001
3-3.6.1 Surface Coatings for Concrete Waterfront Structures. Sound
concrete piles and other waterfront concrete structures are generally left
uncoated and provide years of excellent service. Existing concrete structures,
above the splash zone, however, may be successfully coated for aesthetics, for
marking purposes, and for protection against wind driven rain and sand, and salt
spray. The application of a coating over a penetrating sealer is not recommended
because the sealer reduces the bond strength of the coating to the concrete.
It is both difficult and labor intensive to coat immersed concrete and
concrete in the splash zone. These areas require using either cofferdams or
divers to apply "splash zone mastics," high performance coatings that cure
underwater, and other specialty coatings. The benefit of applying these coatings,
however, may not warrant the high cost.
3-3.6.2 Coatings for Deck Marking. For use in identifying walkways and
traffic lines, the following marking paints may be applied to clean/dry concrete
decks.
54% volume solids, solvent-based, chlorinated rubber: 1 coat at 0.2
to 0.25 mm (7.87 to 9.84 mils) DFT
50% volume solids, solvent-based alkyd: 1 coat at 0.2 to 0.25mm
(7.87 to 9.84 mils) DFT
60% volume solids, waterborne acrylic (water-based): 1 coat at 0.2
to 0.25mm (7.87 to 9.84 mils) DFT
3-3.6.3 Other Coatings. Concrete buildings above the splash zone may be
coated for aesthetics and protection against wind driven rain. Surface preparation
of concrete surfaces may consist of the following sequential procedures:
100% removal of biological growth
removal of unsound coatings
removal of surface contamination such as oil, grease, dirt, and
efflorescence
removal of weak surface cement (laitance)
removal of surface chloride contamination
brush-off blasting of sound coatings
light abrasive blasting of uncoated concrete
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