403Crack Sealing In Asphalt Pavement

403.1 Description:

The work shall consist of the cleaning, crack sealing, and crack filling in asphalt pavement in the manner and subject to the conditions and regulations prescribed.

403.2 Materials:

The material shall be hot poured crack sealant and conform to the requirements of Section

708.3 of the Specifications. The material must be compatible with asphalt pavement recycling.

403.3 Weather Restrictions:

The sealant material shall not be applied when the weather is foggy, rainy or when the ambient and pavement temperatures are below 40F.

403.4 Construction:

403.4.1 Preparation of Material for Use: Before charging the compound into the melting

unit, the unit s hall be free from all foreign material. If the type of heater to be used requires that the sealing material, as shipped, be cut into smaller pieces before melting, the cutting method used is subject to the approval by the Engineer. The heating kettle use d for melting sealing materials shall be of the indirect heating or double boiler type, using oil as the heat transfer medium. It shall have a thermostatically controlled heat source, a built -in automatic agitator, and thermometers installed to indicate both the temperature of the melted sealing material and that of the oil bath. Other methods of indirect heating approved by the Engineer may be used. A positive means of controlling the temperature of the heat transfer at all points in the system shall be in corporated in the heater. Sealing material shall be uniformly heated until the pouring temperature recommended by the manufacturer is reached. Should the maximum pouring temperature recommended be exceeded, the material will be rejected. The material shall be poured as soon as possible after the pouring temperature is reached. Only sufficient material for the day's operation shall be heated each day.

403.4.2 Preparation of Joints and Cracks for Sealing: The cracks shall be thoroughly

cleaned of all loos e scale, dirt, dust, vegetation, or other foreign matter prior to placing hot poured crack sealant. This shall be accomplished by use of a hot air lance, and any other tools necessary to complete the work. The use of any tool which results in damage to the pavement is prohibited.

403.4.3 Equipment for Applying Sealer: The equipment used shall conform to the

manufacturers recommendations and consist of heating units from which material may be discharged into the crack through the use of flexible lines and suitable shoes.

403.4.4 Placement Requirements: Any spillage of sealing material on pavements shall

be immediately removed. A neat and workmanlike job will be required at all times. At no time shall sealing material be placed in a crack which is either dirty or wet. The crack shall be clean and surface dry at the time of placement. Work will be suspended when cracks are wet or damp and when the atmospheric temperature is below 40 degrees. The standard overband shall be three (3) inch centered over the crack. After the sealant has cooled, settling shall not exceed 3/8 inch below the surface. Any damage to uncured sealant shall be repaired at the contractor’s expense. Cracks wider than one (1) inch and deeper than three (3) inch shouldn’t be sealed to avoid improper sealing. If no overlay work is being performed then no more than 25% of the surface area is to be crack sealed, due to danger of diminished skid resistance. Spalling, adhesive failure, or cohesive failure within 96 hours of installation s hall be replaced at no additional cost.

403.4.5 Equipment, Personnel, and Documentation Requirements: The Contractor

(two (2) days prior to commencement of the project) shall submit to the Engineer a detailed list of all equipment to be used for crack sealing on the project. The Contractor shall also provide certification from the Sealing material manufacturer that the Contractor is qualified to apply the manufacturer's material in conformance with these specifications and the manufacture’s recommendations. The Contractor is responsible for quality control, and shall submit a quality control plan in accordance with these specifications to the Engineer at the Pre -Construction Conference.

403.5 Method of Measurement:

The quantity of work done will be measured in linear feet of “Crack Sealing in Asphalt Pavement” applied and accepted.

403.6 Basis of Payment:

The quantity of work, as determined above, will be paid for at the contract unit price bid for the item below, which price and payment shall be full compensation for furnishing all materials, and doing all the work prescribed in a workmanlike and acceptable manner, including all the labor, tools, equipment, supplies and incidentals necessary to complete the work.

403.7 Pay Item:

ITEM DESCRIPTION UNIT 403001-* Crack Sealing in Asphalt Pavement Linear Foot * Sequence Number SECTION 404-BLANK