5. Spec_814_AsphaltPavementPatching.pdf

814 ASPHALT PAVEMENT PATCHING (5/97)

1. DESCRIPTION

This work consists of patching potholes and skin patching of asphalt surfaces. The work includes preparing the area to be patched, furnishing, and placing all necessary materials. All areas to be patched will be marked by the Government.

2. MATERIALS

Materials used for asphalt patching shall conform to the requirements in FP-14 Section

401 “Asphalt concrete pavement” Asphalt – 1/2" Hot asphalt concrete pavement Caltrans Type A, Grading: PG 64-10.

3. MAINTENANCE REQUIREMENTS

a. Potholes

1) Contactor shall remove all loose materials.

2) The edges and entire hole shall be sprayed with an emulsified asphalt.

3) Prepared potholes shall be patched or barricaded immediately.

4) The hot asphalt mixture shall be placed in layers not exceeding four (4) inches. Each layer shall be compacted thoroughly with hand tampers, mechanical tampers, or rollers.

5) Finished surface shall be compacted with a steel roller or comparable vibratory roller. Upon completion, the compacted patch shall be no more than one quarter (1/4) inch above the level of the adjacent pavement.

6) No holes should be left open overnight.

b. Skin Patches

1) Minor depressions, light raveling, or surface checking at scattered locations marked on the ground shall be treated by applying a skin patch.

2) Prior to skin patching, the surface shall be cleaned of loose and deleterious material, then sprayed with emulsified asphalt at the rate ordered by the Government. No bituminous mixture shall be placed until the prepared surface is approved by the Government.

3) Bituminous mixture shall be distributed uniformly in layers not to exceed two (2) inches compacted depth. When multiple layers are required, joints shall be offset at least six (6) inches between layers.

4) Each layer shall be compacted with a steel roller or comparable vibratory roller not less than five (5) Tons.

5) The completed patch shall have transitions which shall be at least as smooth as the adjacent pavement after twenty-four (24) hours of exposure to traffic.

c. Disposal

1) All materials removed from potholes, patches, and berms shall be placed in areas designated by the Government away from culverts, ditches, and any other drainage feature. Only if the maximum particle size is 2”. If the materials exceed 2”, the contractor shall grind or dispose the excess material outside National Forest Land following all local, state and federal laws.

4. MEASUREMENT

a. Bituminous Mixture

1) Hot and cold bituminous mixture acceptable placed will be measured by the ton.

Bituminous materials incorporated into the mixture will be incidental to the item.

2) Ton Measure - The quantity of mixture will be the number of tons in the accepted work.

Any material rejected in the field as not meeting specifications shall be deducted based on estimated quantities. Rejected quantities shall be reconciled between the Government and the Contractor each day. If not reconciled each day, the Government's figures will apply.

b. The following work is incidental:

1) Cleaning of surfaces.

2) Haul and compaction of bituminous mixture.

3) Material removal and disposal.

4) Emulsified asphalt used on existing surfaces will be measured by the gallon prior to dilution. Dilution materials shall be considered incidental.

5. PAYMENT

a. The accepted quantities will be paid for at the contract unit price shown in the Schedule of Items.

b. Payment will be made under:

Pay Item Description Pay Unit

814 (1) Pothole Patching Ton