250 Pavement Repairs

251 Partial Depth Repair

Description (251.01)

This work consists of partial depth removal of existing pavement in areas exhibiting surface deterioration, applying tack coat, and placing and compacting asphalt concrete.


Removal of Existing Pavement (251.02)

Mark the areas in rectangular shapes.  Unless specified, the pavement should be removed to the full width of the traffic lane at transverse joints and along the longitudinal joint.  Ensure pavement is removed to the depth shown in the plans and that adjacent pavement is not damaged.  If the adjacent pavement is damaged, remove all loose pavement to the depth specified in the plans.

Removed pavement shall be disposed of in accordance with 202.02.  The Inspector shall determine and document where and how pavement is to be disposed by the Contractor.


Placement of Asphalt Concrete (251.03)

The exposed surfaces must be thoroughly coated with 407.02 material to fill all cracks and joint openings.  The approved 448 asphalt concrete must be placed and compacted in as many lifts as necessary to finish flush with the adjacent pavement surface. 

The final lift must be compacted using a Type I pneumatic tire roller that conforms to 401.13.  At least 18 passes should be made over all points on the entire surface of the repair area.  A pass is defined as one movement of the roller over the surface of the patch.  As the rolling progresses, additional patching material may need to be added in order to produce a smooth surface, flush with the existing pavement surface.

Each lift shall be continuously compacted while the material is in a workable condition throughout the depth of the lift.

Unless the repair area is scheduled to be covered with an asphalt overlay within 60 days, trim the limits of the repair area to form a vertical face 1-1/2 inches (38 mm) deep from the surface before placing the final asphalt concrete layer adjacent to the existing pavement.

If the Contract does not include resurfacing, seal the perimeter surface of the repaired areas with a 4-inch (100 mm) wide strip of approved 702.04 asphalt material, RS-1, RS-2, CRS-1, CRS-2, or 702.01 approved PG binder.


Documentation Requirements - 251 Partial Depth Pavement Repair

1.      Mark and record areas to be repaired in rectangular shapes.

2.      Document the removal of deteriorated pavement to a suitable depth as specified by plan or as directed by the Engineer.

3.      Document the disposal of removed pavement.

4.      Document that the area was cleaned and tacked with 407 tack coat.

5.      Document the placement and compaction (number of lifts and compaction method) of approved 448 Type I asphalt.

6.      Document the location of repairs, measurements, and calculations, and pay per 251.04.

7.      Show documentation on CA-D-6 or other approved form.