515SAWING AND SEALING OF ASPHALT OVERLAYS

515.1DESCRIPTION—This work is the saw cutting of new asphalt concrete courses directly above existing

or constructed transverse joints in the underlying concrete pavement as directed and sealing the reservoir.

515.2MATERIAL—

515.3CONSTRUCTION—

placing any asphalt courses. For transverse joints across multiple lanes where traffic is diverted to an adjacent lane, locate, and reference an additional point along the transverse joint to facilitate marking the location of the joint in one lane while traffic is traveling in the adjacent lane. Prepare a QC plan outlining the control of locating and referencing transverse joints. Have the QC plan describe the personnel, equipment, and methods necessary to accurately locate, reference and later mark for sawing all joint locations. Submit the QC plan to the Representative at least 21 days before the start of referencing operations. Do not begin joint referencing until the Representative reviews the QC plan. Before or on the first day of joint referencing and before the placement of any asphalt courses, demonstrate the ability to accurately relocate the existing transverse joints using the reference data to the satisfaction of the Representative at no additional cost to the Department. If the joint referencing and relocating process does not yield consistent results within a ± 1 inch tolerance, stop all related operations and amend the QC plan to ensure accurate referencing.

which do not meet this tolerance will be declared defective as outlined in Section 105.12. Do not saw cut until the asphalt course has cooled below 140F. Perform saw cutting and sealing within 7 days after placing the wearing course. Perform this work on all finished overlay areas before discontinuing work because of seasonal paving limitations. Make saw-cuts only in the lane in which the existing joint is located. Extend the saw -cuts through any existing widening. Provide separate saw-cuts in each lane if existing transverse joints are offset more than 1 inch. Use the following table to determine saw-cut reservoir size:

Overlay Thickness inches Reservoir inches ≤ 1 1/2 1/2 deep by 1/2 wide > 1 1/2 1 deep by 1/2 wide

Additionally, if the total depth of overlay is 3 1/2 inches or greater, make an initial saw-cut 1/8 inch wide to a depth of 1 1/2 inches or one-third of the total overlay thickness, whichever is greater. Indicated overlay depths do not include scratch or leveling courses less than 1 inch. If not placing the wearing course within the same construction season, provide a 1/8- inch-wide saw-cut in the last placed asphalt course to a minimum depth of 1 inch or one- third the thickness of the asphalt material placed, whichever is greater.

satisfaction of the Representative. Clean the reservoir immediately before placing sealing material. When using compressed air, use air free of oil, moisture, or any other substance that would prevent bonding of sealing material to the reservoir faces.

Do not place sealing material if the air temperature is less than 40F, or above 90F, unless otherwise allowed by the Representative. Determine the safe heating temperature and recommended pouring temperature from the manufacturer's shipping container. Heat and maintain the material temperature within these recommended safe temperatures. Place the material as close as possible to the recommended pouring temperature. Do not maintain any single batch of material at the pouring temperature for more than 6 hours. Reheat according to the manufacturer's recommendations. Place tape bondbreaker on bottom of joint reservoir immediately before sealing. Do not allow tape to extend up the reservoir face more than 1/8 inch. Fill the reservoir with sealing material to a level 1/8 inch to 1/4 inch below the pavement surface. Do not allow sealing material to spread over the pavement surface.

515.4MEASUREMENT AND PAYMENT—Linear Foot