TABLE 1
UNIFORMITY REQUIREMENTS--STATIONARY MIXERS
Regular Tests
Abbreviated Tests
Allowable
Allowable
Maximum Range for
Maximum Range
Parameter
Average of 3 Batches
for 1 Batch
___________
______________________
____________________
Compressive strength at 7 days,
10.0 percent
0.0 percent
Water content
1.5 percent
--
[b. Truck Mixers: Mixer performance (uniformity) tests for truck
mixers shall be made in accordance with ASTM C 94/C 94M.]
1.12.3
Transporting Equipment
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NOTE: Retain bracketed phrase permitting truck
mixers only if truck mixers are permitted by
paragraph Concrete Mixers above.
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Concrete shall be transported to the paving site in nonagitating equipment
conforming to ASTM C 94/C 94M [in approved truck mixers designed with extra
large blading and rear opening specifically for low slump concrete] or in
approved agitators. All transporting equipment shall be designed and
operated to deliver and discharge the required concrete mixture completely
without segregation.
1.12.4
Transfer and Spreading Equipment
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NOTE: Edit bracketed items as appropriate. A
transfer spreader shall be required for all airfield
paving projects. A travelling surge hopper should
be considered for major airfield paving projects.
Coordinate requirements with Part 3 requirements in
sub-paragraph: Traffic on Underlying Material.
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Equipment for transferring concrete from the transporting equipment to the
paving lane in front of the paver shall be specially manufactured,
self-propelled transfer equipment which will accept the concrete outside
the paving lane and will transfer and spread it evenly across the paving
lane in front of the paver and strike off the surface evenly to a depth
which permits the paver to operate efficiently. [The travelling surge
hopper shall be a specially manufactured, self-propelled transfer-placer
which will operate in front of the paver and accept the concrete from the
transporting equipment outside the paving lane, store it as necessary, and
feed it out evenly across the lane in front of the paver at a depth which
permits the paver to operate efficiently.]
1.12.5
Paver-Finisher
The paver-finisher shall be a heavy-duty, self-propelled machine designed
specifically for paving and finishing high quality pavement. The
SECTION 02753
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