02598 Cold Milling.doc

Base Pavements IDIQ

JCGU 09-1700

DIVISION 02 - SITE WORK

SECTION 02598 - COLD MILLING OF BITUMINOUS PAVEMENTS

PART 1 - GENERAL:

1.1 REFERENCES: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only. All publications shall be the latest version/edition/revision of the documents listed below, in effect on the date of this solicitation, except where a date is given.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM C 136

Sieve Analysis of Fine and Coarse Aggregates

1.2 WEATHER LIMITATIONS:

Milling shall not be performed when there is accumulation of snow or ice on the pavement surface.

1.3 GRADE AND SURFACE-SMOOTHNESS REQUIREMENTS:

1.3.1 Grade: The finished milled surfaces shall conform to the lines, grades, and cross sections indicated. The finished milled-pavement surfaces shall vary not more than 0.06 foot from the established plan grade line and elevation. Finished surfaces at a juncture with other pavements shall coincide with the finished surfaces of the abutting pavements. The deviations from the plan grade line and elevation will not be permitted in areas of pavements where closer conformance with planned grade and elevation is required for the proper functioning of appurtenant structures involved.

1.3.2 Surface Smoothness: Finished surfaces shall not deviate from the testing edge of a 12-foot straightedge more than 1/2 inch in the transverse or longitudinal direction.

PART 2 - PRODUCTS:

Not Applicable

PART 3 - EXECUTION:

3.1 PREPARATION OF SURFACE:

The pavement surface shall be cleaned of excessive dirt, clay, or other foreign material immediately prior to milling the pavement.

3.2 MILLING OPERATION:

The maximum size of the milled material, millings or cuttings, should be equal to one inch. The pavement shall be milled a total average thickness of 1-1/2 inch. Cold-milling operation shall be conducted to ensure that only bituminous pavement is removed and base course is not disturbed. A layer of bituminous pavement, ½ inch to ¾ inch thick, shall be left in place over the undisturbed base course. Sufficient passes shall be made so that the designated area is milled to the grades and cross sections indicated. The milling shall proceed with care and in depth increments that will not damage the pavement below the proposed finished grade. Any items, such as manholes, valve boxes, and utility lines, damaged or any pavement that is torn, cracked, gouged, broken, or undercut shall be repaired or replaced as directed. Removed material shall have a minimum of 95 percent by weight passing a 7/8-inch sieve when tested in accordance with ASTM C 136-84.

3.3 GRADE AND SURFACE-SMOOTHNESS TESTING:

3.3.1 Grade-Conformance Tests: The finished milled surface of the pavement will be tested for conformance with the plan-grade requirements and will be tested for acceptance by the Contracting Officer by running lines of levels at intervals not exceeding 20 feet longitudinally and 10 feet transversely to determine the elevation of the completed pavement. The Contractor shall correct variations from the designated grade line and elevation in excess of the plan-grade requirements as directed. Skin patching for correcting low areas will not be permitted. The Contractor shall remove and replace the deficient low area. Sufficient material shall be removed to allow at least 1 inch of asphalt concrete to be placed.

3.3.2 Surface-Smoothness Tests: After completion of the final milling, the finished milled surface will be tested by the Government with a straightedge. Other approved devices may be used provided that, when satisfactorily and properly operated, such devices reveal all surface irregularities exceeding the tolerances herein before specified. Surface irregularities that depart from the testing edge by more than ¼- inch shall be corrected.

3.4 REMOVAL OF MILLED MATERIAL:

All demolished materials and debris shall become the property of the Contractor and shall be disposed of/or recycled off base at the Contractor’s expense in accordance with local, state, and,federal environmental laws and regulations.

END OF SECTION

Section 02598 – Page 1 of 2