treated with anti-adhesive agents selected from the QPL. The truck beds shall be raised after application of non-foaming anti-adhesive agents to drain liquids from the bed prior to HMA being loaded into the truck. The Department will maintain a QPL of Anti-Adhesive Materials. Hauling equipment shall be equipped with a watertight cover to protect the 30 mixture.
The paver shall be self-propelled, and equipped with a material receiving system, and equipped with heated and vibrating screeds. The paver may also include automatic slope and grade controls, extendable screeds and extendable augers. Automatic control devices shall be separated from the paver screeds, paver tracks 40 or wheels and be capable of adjusting both sides of the screeds automatically to maintain a constant angle of attack in relation to the grade leveler device or grade line. A grade leveling system may be used to activate the control devices on each HMA course, including matching lays. The leveling system shall be attached to the paver and operated parallel to the paver’s line of travel.
Extendable screeds shall be rigid, heated, vibrating, and be capable of maintaining the cross slope and line and grade of the pavement to produce uniform placement of the materials. 50 Auger extensions shall be used when required to distribute the HMA uniformly in front of the screed. When a dense graded intermediate or a surface mixture is placed adjacent to an aggregate or earth shoulder, the side of the paver adjacent to the aggregate or earth shoulder shall be equipped with a device capable of constructing a safety edge. The following devices are approved for this application:
™, Advant-Edge Paving Equipment LLC 60
™, TransTech Systems, Inc.
™, Troxler Electronic Laboratories, Inc.
to the proper grade and slope. 70 409.03 350 3. Other Mechanical Devices Inaccessible or short sections of HMA ma y be placed with specialty equipment approved by the Engineer.
Compaction equipment shall be self-propelled, steel wheel or pneumatic tire types, in good condition, and capable of reversing direction without backlashing. All roller wheels shall be equipped with scrape rs to keep the wheels clean, have water spraying devices on the wheels, and steering devices capable of accurately guiding the 80 roller. 1. Tandem Roller A roller having two axles and a minimum weight of 10 t.
A roller having three wheels with a minimum bearing of 300 lb/in. on the rear wheels. The crown of the wheels shall not exceed 2.5 in. in 18 ft. A tandem roller which has a drive wheel bearing of no less than 300 lb/in. may be 90 used in lieu of the three wheel roller.
A pneumatic tire roller shall have a minimum rolling width of 5.5 ft. The roller shall be equipped with compaction tires, minimum size 7:50 by 15, exerting an average contact pressure from 50 to 90 psi uniformly over the pavement.
The wheels on at least one axle shall be fully oscillating vertically and mounted to prevent scuffing of the pavements during rolling or turning operations. Charts or tabulations showing the contact areas and pressures for the full range of tire inflation 100 pressures and for the full range of tire loadings for each compactor shall be furnished to the Engineer.
variable amplitude system, a speed contro l device, and have a minimum vibration frequency of 2,000 vibrations per minute. A reed tachometer shall be provided for verifying the frequency of vibrations.
An oscillatory roller shall have both drums equipped for horizontal and vertical shear forces or one drum equipped for horizontal and vertical shear force and the other drum equipped for a vertical impact force.
A trench roller shall have a compaction wheel bearing of no less than 300 lb/in. 409.03 351 7. Specialty Roller/Compactor Inaccessible or short sections of HM A may be compacted with specialty equipment approved by the Engineer. 120
A spreader shall be a self-propelled, pneumatic tired, motorized unit with a front loading hopper and a transportation system for distributing the aggregates uniformly across the pavement. 2. Rotary Power Broom A motorized, pneumatic tired unit with rotary bristle broom head. 130
The inertial profiler shall be in accordance with ITM 917.