Attach 4.2 UFGS 32 01 16.71.pdf

SECTION 32 01 16.71 Page 1

Revised 24 March 2021

USACE / NAVFAC / AFCEC / NASA UFGS-32 01 16.71 (February 2017)

Preparing Activity: USACE Superseding UFGS-32 01 16.17 (August 2008)

UNIFIED FACILITIES GUIDE SPECIFICATIONS

References are in agreement with UMRL dated January 2021

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 01 16.71

COLD MILLING ASPHALT PAVING

02/17

PART 1 GENERAL

1.1 UNIT PRICES

1.1.1 Measurement

1.1.2 Payment

1.2 QUALITY ASSURANCE

1.2.1 Grade

1.2.2 Surface Smoothness

1.2.3 Traffic Control

1.3 EQUIPMENT, TOOLS, AND MACHINES

1.3.1 Cold-Milling Machine

1.3.2 Cleaning Equiment

1.3.3 Straightedge

1.4 ENVIRONMENTAL REQUIREMENTS

PART 2 PRODUCTS

PART 3 EXECUTION

3.1 MILLING OPERATION

3.2 GRADE AND SURFACE-SMOOTHNESS TESTING

3.2.1 Grade-Conformance Tests

3.2.2 Surface-Smoothness Tests

3.3 REMOVAL OF MILLED MATERIAL

-- End of Section Table of Contents --

SECTION 32 01 16.71 Page 2

USACE / NAVFAC / AFCEC / NASA UFGS-32 01 16.71 (February 2017)

Preparing Activity: USACE Superseding UFGS-32 01 16.17 (August 2008)

UNIFIED FACILITIES GUIDE SPECIFICATIONS

References are in agreement with UMRL dated January 2021

SECTION 32 01 16.71

COLD MILLING ASPHALT PAVING

02/17

NOTE: This guide specification covers the requirements for cold milling of bituminous pavement for airfields, roads, streets, parking areas, and other general applications.

PART 1 GENERAL

NOTE: This guide specification can be used to specify cold milling alone on structurally sound pavements for surface texturing to increase skid resistance of a worn pavement, or for pavement removal to restore roadway geometry. Cold milling can also be used in conjunction with mill and fill operations.

1.1 UNIT PRICES

1.1.1 Measurement

The quantity of milled pavement will be the number of square yards completed and accepted as determined by the Contracting Officer.

Determine the number of square yards of milled pavement by measuring the length and width of the milled surface within the specified work area.

Measure the width of the area to the closest inch and measure the length of the area to the closest foot.

1.1.2 Payment

Payment will be to the nearest square yard. No payment will be made for milling outside the specified area of work.

1.2 QUALITY ASSURANCE

1.2.1 Grade

Mill pavement such that the finished surface conforms to the lines, grades, and cross sections as they currently exist. The maximum allowable deviation of the finished milled pavement surfaces from the established

SECTION 32 01 16.71 Page 3 plan grade line and elevation will be 1/4 inch. 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.

1.2.2 Surface Smoothness

The maximum allowable deviation of the finished surfaces from the testing edge in the transverse or longitudinal direction will be 1/4 inch.

1.2.3 Traffic Control

Provide all necessary traffic controls during milling operations.

1.3 EQUIPMENT, TOOLS, AND MACHINES

Maintain in a satisfactory working condition equipment, tools, and machines used in the performance of the work.

1.3.1 Cold-Milling Machine

Provide a cold-milling machine which is self-propelled, capable of milling the pavement to a specified depth and smoothness and of establishing grade control; with means of controlling transverse slope and dust produced during the pavement milling operation. Machine will have capability of adding water in front of equipment to minimize dust during milling operation. The machine will have the ability to remove the millings or cuttings from the pavement and load them into a truck. The milling machine will not damage any part of the pavement structure that is not to be removed.

1.3.2 Cleaning Equipment

Provide cleaning equipment suitable for removing and cleaning loose material from the pavement surface.

1.3.3 Straightedge

Furnish and maintain at the site, in good condition, one 12 foot straightedge or other suitable device for each milling machine, for testing the finished surface. Make straightedge available for Government use. Use straightedges constructed of aluminum or other lightweight metal, with blades of box or box-girder cross section with flat bottom reinforced to insure rigidity and accuracy. Use straightedges with handles to facilitate movement on the pavement.

1.4 ENVIRONMENTAL REQUIREMENTS

Do not perform milling when there is accumulation of snow or ice on the pavement surface.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 MILLING OPERATION

SECTION 32 01 16.71 Page 4

When the milled material (cutting) is to be cold recycled, the maximum size of the cuttings should be equal to or less than one-half of the recycled pavement thickness. Generally, the maximum size for a single 4 inch lift of pavement will be 2 inches or less. For hot recycling the recommended maximum size of the milled material is 2 inches.

Conduct cold-milling operation to ensure that only bituminous pavement is removed and base course is not disturbed. Leave in place a layer of bituminous pavement, 2 inches thick, over the undisturbed base course.

A minimum of seven days’ notice is required, prior to start work, for the Contracting Officer to coordinate the milling operation with other activities at the site. Make sufficient passes so that the designated area is milled to the grades and cross sections indicated. Mill the pavement in depth increments that will not damage the pavement below the designated finished grade. If scabbing occurs, the surface will not meet smoothness requirements. Take steps to modify the process as needed to prevent scabbing from occurring. Repair or replace, as directed, items damaged during milling such as manholes, valve boxes, utility lines, pavement that is torn, cracked, gouged, broken, or undercut. Remove the milled material from the pavement and load into trucks.

3.2 GRADE AND SURFACE-SMOOTHNESS TESTING

3.2.1 Grade-Conformance Tests

Test the finished milled surface of the pavement for conformance with the plan-grade requirements and for acceptance by the Contracting Officer.

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. Remove and replace the deficient low area. Remove sufficient material to allow at least 1 inch of asphalt concrete to be placed.

3.2.2 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 specified. Correct surface irregularities that depart from the testing edge by more than 1/4 inch. Skin patching for correcting low areas will not be permitted. Remove and replace the deficient low area. Remove sufficient material to allow at least 1 inch of asphalt concrete to be placed.

3.3 REMOVAL OF MILLED MATERIAL

Transport material that is removed to central plant for hot-mix or cold-mix recycling. Stockpile material that is removed as specified and in such a manner to prevent segregation or contamination. Material that is removed

SECTION 32 01 16.71 Page 5 will become the property of the Contractor and removed from the site.-- End of Section --