Specification 814 - Asphalt paving patching.pdf

814 ASPHALT PAVEMENT PATCHING (2/99)

1. DESCRIPTION

This work consists of patching potholes. The work includes preparing the area to be patched, furnishing and placing all necessary materials and work. 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 – 3/4" Hot asphalt concrete pavement Caltrans Type A, Grading : PG 64-10

3. MAINTENANCE REQUIREMENTS

a. Pothole repair

1. Existing materials shall be removed to a minimum of four (4) inches below the bottom of the asphalt surfacing or as necessary to reach firm support but limited to a maximum depth of eight (8) inches. If firm support for a patch is not available, the hole shall be barricaded, and the Government shall be notified.

Prior to the Contractor placing any materials, the Government will decide on any corrections to be made.

2. The edges of the prepared hole shall be extended to form a vertical face.

The prepared hole shall be rectangular in shape and cleaned of all loose material. The prepared area shall be backfilled with material product of the excavation or crushed aggregate base material in layers not to exceed six (6) inches in depth, compacting each layer with mechanical equipment designed for this purpose. Compaction shall continue until visual displacement ceases.

Backfilling shall continue to a depth of five (5) inches from the top of the existing asphalt surface. The bottom and faces shall be sprayed with an emulsified asphalt.

3. Prepared holes shall be patched or barricaded immediately.

4. The hot mix asphalt 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 flush with or not more than one quarter (1/4) inch above the level of the adjacent pavement.

b. Disposal

All materials removed from potholes, patches, and berms shall be placed in areas designated by the Government if the maximum particle size is 2”. If the materials exceed 2” contractor shall dispose the excess material off National Forest Land following all local, state and federal laws.

4. MEASUREMENT

a. Bituminous Mixture

1. Hot and cold bituminous mixture acceptably placed will be measured by the ton for Pay Items 814(2) and 814(4) and by the square yard for Pay Items 814(1) and 814(3). 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 and materials are incidental:

1. Cleaning of surfaces.

2. Haul and compaction of bituminous mixture.

3. Material removal and disposal.

4. Emulsified asphalt for tack coat.

5. Crushed aggregate backfill material.

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 Pay Unit

814(01) Pothole Patching Ton