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All
crack widths measured using crack gage and recorded.
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Concrete
surfaces to be clean, sound, and free of standing water. Dust laitance,
grease, curing compounds and other contaminates to be removed by blastcleaning
or equivalent mechanical means. Concrete surfaces will conform to SSPC
specifications TU-13 prior to coating applications. Steel surfaces to be free
from chloride and sulfate ions and to be near white metal blast finish 3-5 mil
anchor profile.
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PCSI
polyurea will span cracks which are less than or equal to 50% of its span
length. Cracks which are larger, or through the structure, are to be repaired
as follows:
a. Visible
cracks 0.008 inch or less do not require additional treatment.
b. Visible
cracks 0.008 inch or greater are to be routed to approximately ½”x3/8” joint,
primed and caulked with Sika 2C sealant.
c. All
cracks greater than 0.03 inch to be treated by epoxy crack injection using
Sikadure 52.
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Epoxy crack injection to follow manufacturers procedures. After injection and
cure, the exterior side is to be routed to approximately ½”x3/8” joint, primed
and caulked using Sika 2C sealant.
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Cracks which are in movement transitions must be evaluated, regardless of
current size, for possible epoxy crack injection.
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Please refer to Polyurea coating Systems, Inc. Specification Guide for further
application details.
