1.3
PLANT, EQUIPMENT, MACHINES, AND TOOLS
1.3.1
Asphalt Mixing Plant
The bituminous asphalt plant shall have enough capacity to produce the
quantities of bituminous mixtures required for the project. Plants used
for the preparation of hot-mix asphalt shall conform to the requirements of
ASTM D 995 with the following changes:
a. Testing Facilities. The Contractor shall provide laboratory
facilities at the plant for the use of the Government's acceptance testing
and the Contractor's quality control testing.
b. Storage Bins. Use of storage bins for temporary storage of hot-mix
asphalt will be permitted as follows:
(1) The asphalt mixture may be stored in insulated storage bins
for a period of time not exceeding 1 hour.
(2) The asphalt plant shall have enough capacity to produce
the quantities of asphalt mixtures required for the project. Hauling
equipment, paving machines, rollers, miscellaneous equipment, and tools
shall be provided in sufficient numbers and capacity and in proper working
condition to place the asphalt paving mixtures at a rate equal to the plant
output.
1.3.2
Asphalt Paver
Asphalt pavers shall be self-propelled, with an vibrating screed, heated as
necessary, and shall be capable of spreading and finishing courses of
hot-mix asphalt which will meet the specified thickness, smoothness, and
grade. The paver shall have sufficient power to propel itself and the
hauling equipment without adversely affecting the finished surface.
1.3.3
Receiving hopper
The paver shall have a receiving hopper of sufficient capacity to permit a
uniform spreading operation. The hopper shall be equipped with a
distribution system to place the mixture uniformly in front of the screed
without segregation. The screed shall effectively produce a finished
surface of the required evenness and texture without tearing, shoving, or
gouging the mixture.
1.3.4
Automatic Grade Control
If an automatic grade control device is used, the paver shall be equipped
with a control system capable of automatically maintaining the specified
screed elevation. The control system shall be automatically actuated from
either a reference line and/or through a system of mechanical sensors or
sensor-directed mechanisms or devices which will maintain the paver screed
at a predetermined transverse slope and at the proper elevation to obtain
the required surface. The transverse slope controller shall be capable of
maintaining the screed at the desired slope within plus or minus 0.1
percent. The transverse slope controller shall not be used to control
grade. The controls shall be capable of working in conjunction with any of
the following attachments:
a.
Ski-type device of not less than 9.14 m 30 feet in length.
SECTION 02746
Page 8
Previous Page
