ITEM 254 PAVEMENT PLANING
254.01
Description
254.02
Equipment
254.03 Planing
254.04 Surface Patching
254.05 Surface
Tolerances
254.06 Method
of Measurement
254.07 Basis of
Payment
254.01 Description. This work consists of planing the existing asphalt concrete
and disposing of the cuttings, and, if specified in the Contract,
patching the planed surface.
254.02 Equipment. Use self-propelled planing equipment that has sufficient power and stability
to consistently and efficiently meet the requirements of 254.05 and the plans. Use equipment with either grinding, sawing, or milling type cutters.
Ensure that the cutters are mounted rigidly to the carrier and are adjustable
to control the depth of cut and cross-slope. Accomplish longitudinal planing action by using equipment with a suitable carrier
wheelbase or with an automatic control system having an external
reference. Ensure that cross-slope adjustments or automatic controls are
capable of producing either a variable or a constant cross-slope, as required.
For
small or confined areas, the Contractor may use suitable supplemental equipment
or methods approved by the Engineer.
254.03 Planing. Make one
or more planing passes, as necessary, over the
designated area to the depth specified in the plans. Remove
irregularities such as bumps, corrugations, and wheel ruts, when required, to
establish a new pavement surface elevation or cross-slope.
Remove
cuttings from the surface following each pass. Before opening the
completed area to traffic, thoroughly clean the surface of all loose material
that would create a hazard or nuisance, or would redeposit into the surface
texture. Dispose of cuttings according to 202.
Implement
effective measures to control dust, pavement contamination, and the scattering
of loose particles during planing and cleaning
operations.
If
planing damages the adjacent pavement, repair the
damaged area to the Engineer’s satisfaction. Ensure that the repaired
area matches the adjacent pavement in terms of smoothness and mix type.
254.04 Surface Patching. Patch
areas of the planed surface that the Engineer designates that have spalling or dislodged unsound pavement. Before
patching, clean areas of loose material, coat with 407.02 asphalt material, and fill with Item 448, Type 1 material. Level and compact new
material flush to the adjacent planed pavement.
254.05 Surface Tolerances. Plane the
surface free from grooves, ridges, gouges, or other irregularities detrimental
to the safe operation of vehicles on the planed surface.
If
the Contract specifies planing without resurfacing,
plane the surface to a smoothness of 1/8 inch in 10 feet (3 mm in 3 m).
If the Contract specifies resurfacing after planing,
plane the surface to a smoothness of 1/4 inch in 10 feet (6 mm in 3 m).
Match the surfaces at the edges of adjacent passes within 1/8 inch (3
mm). Ensure that the cross-slope of the planed surface is within 3/8 inch
in 10 feet (10 mm in 3 m) of the specified cross-slope.
254.06 Method of Measurement. The
Engineer will measure the quantity of Pavement Planing,
Asphalt Concrete by the number of square yards (square meters).
The
Engineer will measure the quantity of Patching Planed Surface by the number of
square yards (square meters).
254.07 Basis of Payment. The
Department will not pay for repairs due to damage caused by planing
operations. If the depth of the planed surfaces is increased by more than
3/8 inches (10 mm) the Department will compensate for the additional work.
The
Department will pay for accepted quantities at the contract prices as follows:
Item
Unit
Description
254
Square
Yard
Pavement Planing, Asphalt Concrete
(Square Meter)
254
Square Yard
(Square
Meter)
Patching Planed Surface