3.3.3.2
Epoxy Grout for Cracks
Apply epoxy grout at a thickness recommended by the manufacturer. Work
grout into place and consolidate thoroughly so that contact surfaces are
wetted by the grout. Finish surface of grout to the required texture. Do
not feather edge epoxy grout onto adjacent surfaces.
3.3.4
Pressure Grouting of Cracks
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NOTE: The interval between valves should be greater
than the thickness of the member being repaired.
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Clean each crack of dust, dirt, loose concrete and unsound material.
Insert a valve at both ends of each crack, at the junction of two cracks,
and along the length of each crack at 400 to 500 mm [16 to 20] [_____] inch
intervals. Fill crack between valves with crack surface sealer. After
crack surface sealer has hardened and cured, pump crack sealer into valve
at one end of crack. For vertical surfaces start at lowest valve and work
upwards. As crack sealer appears at next valve, pinch closed pumping valve
and move to next valve and commence pumping. Continue procedure until
other end of crack is reached. Avoid delays in pumping operation. After
crack sealer has hardened and cured grind valves off flush with concrete
surface. Coat areas of valves with crack surface sealer and allow to
harden and cure.
3.4
CURING
Cure epoxy materials in accordance with manufacturer's recommendations.
3.5
FIELD QUALITY CONTROL
3.5.1
Sampling
As soon as epoxy resin and aggregate materials are available for sampling,
obtain by random selection a sample of each batch. Clearly identify
samples by designated name, specification number, batch number, project
contract number, intended use and quantity involved.
3.5.2
Testing
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NOTE: For runway repair projects and other projects
requiring large amounts of epoxy repairs use the
bracketed sentences.
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At the discretion of the
Contracting Officer, samples provided may be
tested by the Government
for verification. [Test samples by an approved
laboratory. If a sample
fails to meet specification requirements after two
tests, replace the batch
represented by the samples tested and retest. Test
aggregates in accordance
with ASTM C 117 and ASTM C 136.]
3.5.3
Inspection
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NOTE: Use this paragraph for airfield repair
projects and other projects having large patched
SECTION 03930
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