00746.00 796 Section 00746 - Crack Sealing Flexible Pavements
Description
00746.00Scope - This Work consists of repairing and resealing cracks in flexible Pavements at
locations designated by the Engineer.
Materials
00746.10Sealants - Furnish all sealant Materials for crack repair of flexible Pavements that is
approved by the Engineer before being incorporated into the Work . Before beginning Work , furnish a complete written statement of the origin, compositi on and manufacturer of M aterials that are to be used. Furnish hot applied joint sealants of the type intended for use in sealing cracks in asphalt concrete Pavement that meet the requirements of 02440.30.
Equipment
00746.20Equipment - Use proper sealing Equipment for the specific M aterial listed according to the
manufacturer's recommendations. The Equipment for sealing compounds shall be a melting kettle of the double boiler, indirect heating type, using oil as a heat -transfer mediu m. The kettle shall be an effective, mechanically operated agitator equipped with a positive, thermostatic temperature control.
Construction
00746.40General - Provide traffic control according to Sections 00220 and 00221
00746.41Mixing and Heating - Follow the manufacturer's recommendations for application. Mix
and heat the sealant M aterials to a minimum temperature of 280 ° F. Do not heat the M aterial above 400 °F.
00746.42Installation Procedure - Where installati on procedures, or any part of the procedures are
required to be done according to the recommendations of the manufacturer of the sealing compound, submit catalogue data and copies of the recommendations before installing the M aterials.
Clean all cracks de signated for sealing of loose and foreign matter. Use a hot lance to perform this cleaning. Use this wand to both clean and dry the crack just prior to sealing.
Do not place any sealant without the prior approval of the Engineer. The Engineer will inspect all cracks. The face of the crack shall be surface dry, and the ambient and Pavement temperatures shall both be at least 45 °F and rising at the time of application of the sealant. Install the sealant so that the in-place sealant is well bonded to the Pavement and free of voids or entrapped air.
Seal the cracks from the bottom up in a neat manner, so that upon completion of the Work the surface of the sealant Material is flush to 3/16 inch below the adjacent Pavement surface. Refill or "spot" all low areas before continuing Work . Level sealant M aterial flush to the surface with a 'V' shaped squeegee device. Squeegee the excess Material so it does not exceed 1 1/2 inches on either side of the crack. If any sealant remains in the 00746.90 797 squeegee when the end of the crack is reached, distribute this excess Material over the crack in a return motion.
00746.43Cleaning and Sanding - Perform the following Work when crack sealing prior to a hot mix
asphalt overlay or to prevent traffic damage and "pickup":
• Completely cover the sealed cracks with a clean sanding Material, then sweep the Pavement surface and leave in a clean condition. • Do not allow any traffic or construction Equipment on the newly sealed cracks for at least 1 hour after placement of the seala nt and refilling has been completed.
Measurement
00746.80Measurement - The quantities of sealed cracks will be measured on either the length
basis, or the weight basis.
Payment
00746.90Payment - The accepted quantities of sealed cracks will be paid for at the Contract unit
price, per foot or pound, as appropriate, for the item "Crack Sealing".
Payment will payment in full for furnishing and placing all Materials, and for furnishing all Equipment , labor, and Incidentals necessary to complete the Work as specified.
No separate or additional payment will be made for required cleaning and routing.