project and delete all others.
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1.5.1
General Requirements
Equipment, plant and tools used in the work shall be subject to approval
and shall be maintained in a satisfactory working condition at all times.
The equipment shall be adequate and shall have the capability of producing
the results specified. Calibrated equipment such as asphalt distributors,
scales, batching equipment, spreaders and similar equipment, shall have
been recalibrated by an approved calibration laboratory within [12] [_____]
months prior to commencing work [and every [_____] months thereafter, by
such laboratory from the date of recalibration, during the term of the
contract]. The Contractor shall submit an equipment list with calibration
reports.
1.5.2
Bituminous Distributors
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NOTE: The bracketed statements at the end of this
paragraph apply specifically to Fog Seal.
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The distributor shall have pneumatic tires of sufficient size and number to
prevent rutting, shoving, or otherwise damaging any part of the pavement
structure. The distributor shall be designed and equipped to distribute
the bituminous material in a uniform double or triple lap at the specified
temperature, at readily determined and controlled rates from 0.23 to 9.05
liters per square meter 0.05 to 2.0 gallons per square yard, with a
pressure range of 172.4 to 517.1 kPa 25 to 75 pounds per square inch with
an allowable variation from the specified rate of not more than plus or
minus 5 percent, and at variable widths. Distributor equipment shall
include a separate power unit for the bitumen pump, full-circulation spray
bars, tachometer, pressure gauges, volume-measuring devices, adequate
heaters for heating of materials to the proper application temperature, a
thermometer for reading the temperature of tank contents, and a hand-held
hose attachment suitable for applying bituminous material manually to areas
inaccessible to the distributor. The distributor shall be equipped to
circulate and agitate the bituminous material during the heating process.[
Provide distributor with an adjustable, both horizontally and verically,
spray nozzle bar. Make normal width of bar application at least 3.7 m 12
feet, with provisions for lesser or larger width when necessary. Equip
distributor with a meter having a dial registering meters of travel per
second feet of travel per minute. Make both dials visible to the
distributor driver. Provide a thermometer and well, not in contact with
any heating tubes, for accurately indicating temperature of asphalt
emulsion.]
1.5.3
Aggregate Spreader
The aggregate-spreading equipment shall be adjustable and capable of
uniformly spreading aggregate at the specified rate in a single-pass
operation over the surface to be sealed.
1.5.4
Pneumatic-Tired Roller
The pneumatic-tired roller shall be of sufficient size to seat the cover
aggregate into the bituminous material without fracturing the aggregate
particles. The rollers shall have a total compacting width of not less
SECTION 02785
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