moisture condition shall be noted and recorded.
b.
Moist
Curing Corrective Action. When a daily inspection report
lists
an area of inadequate curing, immediate corrective action
shall
be taken, and the required curing period for those areas
shall
be extended by 1 day.
c.
Membrane Curing Inspection. No curing compound shall be applied
until the Contractor has verified that the compound is properly
mixed and ready for spraying. At the end of each operation, the
Contractor shall estimate the quantity of compound used by
measurement of the container and the area of concrete surface
covered, shall compute the rate of coverage in square meters/L
square feet/gallon, and shall note whether or not coverage is
uniform.
d.
Membrane Curing Corrective Action. When the coverage rate of the
curing compound is less than that specified or when the coverage
is not uniform, the entire surface shall be sprayed again.
e.
Sheet Curing Inspection. At least once each shift and once per
day on non-work days, an inspection shall be made of all areas
being cured using impervious sheets. The condition of the
covering and the tightness of the laps and tapes shall be noted
and recorded.
f.
Sheet Curing Corrective Action. When a daily inspection report
lists any tears, holes, or laps or joints that are not completely
closed, the tears and holes shall promptly be repaired or the
sheets replaced, the joints closed, and the required curing period
for those areas shall be extended by 1 day.
3.17.10
Cold-Weather Protection
At least once each shift and once per day on non-work days, an inspection
shall be made of all areas subject to cold-weather protection. Any
deficiencies shall be noted, corrected, and reported.
3.17.11
Mixer Uniformity
a.
Stationary Mixers. Prior to the start of concrete placing and
once every 6 months when concrete is being placed, or once for
every 60,000 cubic meters 75,000 cubic yards of concrete placed,
whichever results in the shortest time interval, uniformity of
concrete mixing shall be determined in accordance with ASTM C 94/C
94M.
b.
Truck Mixers. Prior to the start of concrete placing and at least
once every 6 months when concrete is being placed, uniformity of
concrete mixing shall be determined in accordance with ASTM C 94/C
94M. The truck mixers shall be selected randomly for testing.
When satisfactory performance is found in one truck mixer, the
performance of mixers of substantially the same design and
condition of the blades may be regarded as satisfactory.
c.
Mixer Uniformity Corrective Action. When a mixer fails to meet
mixer uniformity requirements, either the mixing time shall be
increased, batching sequence changed, batch size reduced, or
adjustments shall be made to the mixer until compliance is
SECTION 03300A
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