Test Method
Control Limit/Corrective Action
Aggregate Deleterious Materials
Every [30]
see paragraph:
Stop production, retest, replace aggregate
[60] days
AGGREGATES
Increase testing interval to 90 days
if previous 2 tests pass
Plant - Scales, Weighing Accuracy
Monthly
NRMCA QC 3
Stop plant ops, repair, recalibrate
Plant - Batching and Recording Accuracy
Weekly
Record/Report
Record required/recorded/actual batch mass
Stop plant ops, repair, recalibrate
Plant - Batch Plant Control
Every lot
Record/Report
Record type/amt of each material per lot
Plant - Mixer Uniformity - Stationary Mixers
Every 4
COE CRD-C 55
After initial approval, use abbreviated
months
method. Increase mixing time, change
during
batching sequence, reduce batch size to
paving
bring into compliance. Retest
Plant - Mixer Uniformity - Truck Mixers
Every 4
ASTM C 94/C 94M
Random selection of truck. Increase mixing
months
time, change batching sequence, reduce
during
batch size to bring into compliance. Retest.
paving
Concrete Mixture - Air Content
When test
ASTM C 231
Individual test control chart:
specimens
sample at
Warning +/-1.0 - adjust AEA, retest
prepared
paving site
Action +/-1.5 - halt ops, repair, retest
+ 2 random
Range between 2 consecutive tests:
Warning +2.0 - recalibrate AEA dispenser
Action +3.0 - halt ops, repair, retest
Concrete Mixture - Slump
When test
ASTM C 143/C 143M
Individual test control chart:
specimens
sample at
Upper Warning - 12 mm 1/2 inch below max-
prepared
paving site
adjust batch masses within max W/C ratio
+ 4 random
Upper Action - maximum allowable slump
stop operations, adjust, retest
Range between each consecutive test:
38 mm 1-1/2 inches
stop operations, repair, retest
Concrete Mixture - Temperature
When test
ASTM C 1064/C 1064M
See paragraph: WEATHER LIMITATIONS
specimens
sample at
prepared
paving site
Concrete Mixture - Strength
8 per lot
ASTM C 31/C 31M
See Paragraph: Concrete Strength Testing
sample at
for CQC
paving site
Paving - Inspection Before Paving
Prior to
Report
Inspect underlying mateials, construction
each paving
joint faces, forms, reinforcing, dowels,
SECTION 02753
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