mortar, and debris from the surface. Surfaces shall be thoroughly
moistened with water and the curing compound shall be applied to slab
surfaces as soon as the bleeding water has disappeared, with the tops of
joints being temporarily sealed to prevent entry of the compound and to
prevent moisture loss during the curing period. Compound shall be applied
in a one-coat continuous operation by mechanical spraying equipment, at a
uniform coverage of 20 square meters 200 square feet per 3.8 L gallon.
Concrete surfaces which have been subjected to rainfall within 3 hours
after curing compound has been applied shall be resprayed by the method and
at the coverage specified. Surfaces coated with curing compound shall be
kept free of foot and vehicular traffic, and from other sources of abrasion
and contamination during the curing period.
3.6.3
Epoxy Adhesives
Epoxy adhesives shall be protected and cured in accordance with the
manufacturer's recommendations. The adjacent surfaces and ambient
conditions shall be maintained within the manufacturer's recommendations.
The patch anchors and epoxy adhesive shall be protected from displacement
and disturbances.
3.7
CONCRETE AND MORTAR FINISHES AND COLOR
3.7.1
Matching Adjacent Concrete
Concrete and mortar finishes and color shall match the finish and color of
the existing adjacent concrete. Finishing shall be accomplished at the
time of concrete placement or immediately after formwork removal.
3.7.2
Non-Standard Finish
The exposed surfaces of concrete and mortar patching shall match the
finish, texture, and surface detail of the original surface. Mechanical
finishing and texturing may be required to produce the required finish and
appearance. The finishing and texturing shall be accomplished in such a
way as to help conceal bond lines between the patch and adjacent surfaces.
The texturing shall provide replication of all surface details, including
tooling and machine marks. The equipment used in finishing and texturing
shall be a low-impact energy type which will not weaken the patch or damage
the patch bond and the adjacent concrete. Equipment used for finishing and
texturing shall be demonstrated on sample panels of concrete and mortar to
demonstrate performance and suitability of the equipment and methods.
Equipment and methods shall be subject to approval.
3.8
FINAL CLEANING
No sooner than 72 hours after completion of the curing period and after
joints are sealed, faces and other exposed surfaces of concrete shall be
washed down with water applied with a soft bristle brush, then rinsed with
clean water. Discolorations which cannot be removed by these procedures,
will be considered defective work. Cleaning work shall be done when
temperature and humidity conditions are such that surfaces dry rapidly.
Adjacent surfaces shall be protected from damage during cleaning operations.
3.9
PROTECTION OF WORK
Work shall be protected against damage from subsequent operations.
SECTION 03900
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