B. BASE COURSE AND BINDER COURSE PAVEMENT:
1. Immediately prior to installing the base and/or binder course, the trimmed edges shall
be made stable and unyielding, free of loose or broken pieces and all edges shall be
thoroughly broomed clean. Contact surfaces of trench sides, curbings, manholes,
catch basins, or other appurtenant structures in the pavement shall be painted
thoroughly with a uniform coating of asphalt emulsion (tack coat), just before any
mixture 1s placed against them.
2. The binder course shall be repaired as necessary to maintain the surface of the
pavement until placement of the permanent overlay. If required, the Contractor shall
place a leveling course before placing the permanent overlay.
C. TOP COURSE OR SURFACE TREATMENT PAVEMENT (PERMANENT OVERLAY):
3.05
A.
1. | Top course or surface treatment shall be placed over the full width as shown on
the drawings or as specified.
2. Prior to placement of the top course or surface treatment, the entire surface over
which the top course or surface treatment is to be placed shall be broom cleaned and
tack coated.
3. Top course or surface treatment pavement placed over trenches may be feathered to
meet existing paved surfaces, if approved by the Engineer.
4. Prior to placing full width top course or surface treatment pavements, keyways shall
be cut in all intersecting streets.
COLD PLANING
The Contractor shall remove bituminous concrete pavement by use of an approved "cold
planer" equipment to a depth sufficient to apply an overlay of 2 inches of bituminous
concrete pavement. Existing pavement shall be removed to a depth of 2 inches at the road
centerline and 3 inches at the curb line.
The equipment shall be capable of accurately and automatically establishing profile grades
along each edge of the machine by referencing from the existing pavement by means of a
ski or matching shoe from an independent grade control and shall have an automatic
system for controlling cross slope at a given rate.
The machine shall be equipped with an integral loading means to immediately remove
material being cut from the surface of the roadway and discharge cuttings into a truck, all in
one operation. All planning machinery shall be equipped with dust-control devices to
prevent any dust produced in the cutting operation from escaping into the air.
The bituminous surfaces being planed and profiled shall be removed to a depth, width,
grade and cross section directed by the Engineer. Loose material resulting from the
operation shall be the property of the Owner unless otherwise directed by the Engineer.
02745-6
