Test Method
Control Limit/Corrective Action
operation
and embedded items
Paving - Inspection During Paving
During each
Monitor and control paving operation,
paving
including placement, consolidation,
operation
finishing, texturing, curing, and
joint sawing.
Paving - Vibrators
Weekly,
COE CRD-C 521
Test frequency (in concrete), and amplitude
during
(in air), measure at tip/head and average.
paving
Repair or replace defective vibrators.
Moist Curing
2 per lot,
Visual
Repair defects, extend curing by 1 day
min 4 per
day
Membrane Compound Curing
Daily
Visual
Calculate coverage based on quantity/area
Respray areas where coverage defective
Recalibrate equipment
Cold Weather Protection
Once per
Visual
Repair defects, report conditions to COR
3.12.3
Concrete Strength Testing for Contractor CQC
**************************************************************************
NOTE: If paragraph Flexural Strength and Thickness
is based on 28-day flexural strength for acceptance,
modify this subparagraph to match it. The first
option "Cylinders/Beams" includes items a through g;
the second option "Beams" includes listing a through
f.
**************************************************************************
Contractor Quality Control operations for concrete strength shall consist
of the following steps:
a.
Take samples for strength tests at the paving site. Fabricate and
cure test cylinders in accordance with ASTM C 31/C 31M; test them
in accordance with ASTM C 39/C 39M.
b.
Fabricate and cure 2 test cylinders per sublot from the same batch
or truckload and at the same time acceptance cylinders are
fabricated and test them for compressive strength at 7-day age.
c.
Average all 8 compressive tests per lot. Convert this average
7-day compressive strength per lot to equivalent [28] [90]-day
flexural strength using the Correlation Ratio determined during
mixture proportioning studies.
d.
Compare the equivalent [28] [90]-day flexural strength from the
conversion to the Average Flexural Strength Required for Mixtures
from paragraph of same title.
SECTION 02753
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