MILLING
Pavement (asphalt) milling (cold planning, asphalt milling, or profiling) is the process of
removing at least part of the surface of a paved area such as a road, bridge,
or parking lot. Milling removes anywhere from just enough thickness to level
and smooth the surface to a full depth removal.
The Contractor is required to designate the procedures for milling the existing material to include as a minimum the general procedures, equipment, and testing that is conducted.
MILLING PLAN
The general
procedures for asphalt milling, asphalt removal, PCCP milling, scarification
and profile milling, and transition milling are required to be designated in
the QCP.
EQUIPMENT
A
description of the equipment required to mill, cut, and remove the existing
material is required to be designated.
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TESTING
The
procedure for measuring the macro texture of the milled surface in accordance
with ITM 812 is required .
The purpose
of this test is to measure the condition of the surface after milling in
preparation for resurfacing with HMA.
Macro texture test
A minimum frequency of one macro texture test is required. The requirements in accordance with Section 306 are as follows:
Macro texture:
Asphalt Scarification ≥ 2.2 for single course overlays
&
Profile Preparation ≥ 1.8 for multiple
course overlays
Asphalt Milling ≥ 2.2 for single course overlays
≥ 1.8 for multiple course overlays
PCCP milling ≥ 1.8
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