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 one (1) day.
3.8.2.11
Cold Weather Protection and Sealed Insulation Curing
At least once each shift and once per day on nonwork days an inspection
shall be made of all areas subject to cold weather protection. The
protection system shall be inspected for holes, tears, unsealed joints, or
other incongruities which could result in damage to the concrete. Special
attention shall be taken at edges, corners, and thin sections. Any
deficiencies shall be noted, corrected, and reported.
3.8.2.12
Cold Weather Protection Corrective Action
When a daily inspection report lists any holes, tears, unsealed joints, or
other incongruities, the deficiency shall be corrected immediately and the
period of protection extended for one (1) day.
3.8.2.13
Mixer Uniformity
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NOTE: The optional phrases should be used if the
Contractor is to perform the initial test.
Correlate with paragraph EQUIPMENT.
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a. Stationary Mixers - [Prior to the start of concrete placing and]
once every 3 months when concrete is being placed, or once for every
57,000 cubic meters 75,000 cubic yards of concrete placed, whichever
results in the longest time, interval uniformity of concrete mixing
shall be determined in accordance with paragraph EQUIPMENT. [The
initial and] every fourth set of tests shall be regular tests performed
on three batches of concrete. Intermediate uniformity tests shall be
abbreviated tests performed on a single batch of concrete. If the
mixer fails the abbreviated test, a regular test shall be immediately
performed. Whenever adjustments in a mixer or increased mixing time
are required because of failure of a uniformity test, the mixer shall
be reevaluated by a regular test after the adjustments have been
completed. If the Contractor proposes to reduce a mixing time, a
regular test shall be performed to evaluate the proposed time.
Additional testing shall be performed when directed when there is
visible evidence of possible improper mixer performance. Results of
all uniformity tests shall be reported in writing.
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 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. Results of tests shall be reported in
writing.
SECTION 03700
Page 78
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