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1. The crack sealant compound shall be packaged in sealed containers. Each container shall be clearly <br />marked with the name of the manufacturer, the trade name of the sealant, the manufacturer's batch and lot number, <br />the pouring temperature, and the safe heating temperature. <br /> <br />2. Mixing of different manufacturer's brands or different types of sealant shall be prohibited <br /> <br />PART 3 -- EXECUTION <br /> <br />3.1 CONSTRUCTION REQUIREMENTS <br /> <br />A. A copy of the manufacturer's recommendations pertaining to the heating and application of the joint sealant <br />material shall be submitted to the Engineer prior to the commencement of work. These recommendations shall be <br />adhered to and followed by the contractor. The temperature of the sealer in the field application equipment shall <br />never exceed the safe heating temperature recommended by the manufacturer. Any given quantity of material shall <br />not be heated at the pouring temperature for more than six hours and shall never be reheated. Sealing shall not <br />proceed if the temperature of the material has not reached or has fallen below the manufacturer's recommended <br />minimum application temperature. <br /> <br />B. Sealant materials may be placed during a period of rising temperature after the air temperature in the shade <br />and away from artificial heat has reach 40 degrees F and indications are for a continued rise in temperature. During <br />a period of falling temperature, the placement of sealant material shall be suspended when the air temperature, in the <br />shade and away from artificial heat, reaches 40 degrees F. Sealant shall not be placed when in the opinion of the <br />Engineer; the weather or roadbed conditions are unfavorable. <br /> <br />C. Routing and sealing will be permitted only during daylight hours between May 1 and October 15. <br /> <br />D. The Engineer shall determine the actual areas that will be repaired by marking the existing cracks to be <br />routed, cleaned and sealed. The routing, cleaning and sealing shall extend the full width of the surface on transverse <br />cracks. <br /> <br />E. The Contractor shall conduct the bituminous crack sealing operations so that routing, cleaning and sealing is <br />a continuous operation. Traffic shall not be allowed to kneed together or damage the reservoir once it has been <br />created. Routed cracks not sealed before traffic is allowed on the surface shall be re-routed at no additional cost to <br />the Owner. <br /> <br />1. ROUTING. The routing equipment shall be mechanical and power driven and shall be capable of <br />following the existing cracks. All cracks shall be routed 1 inch wide x 1 inch deep. The cracks shall be routed with <br />sharp router blades to the specified dimensions without deviation from the existing crack or creating excessive <br />spalling. Equipment designed to "plow" the cracks to dimension will not be permitted. Wet sawing will not be <br />allowed. <br /> <br />2. CLEANING. Immediately prior to cleaning and sealing the cracks, the entire bituminous surface shall be <br />cleaned to remove all loosened bituminous particles and foreign material and the cracks shall be blown clean with <br />oil-free compressed air. Compressed air shall be 100 psi and 75 cfm minimum at the nozzle. The crack and surface <br />area six (6) inches on both sides will then be cleaned and dried with a hot compressed air heat lance. The heat lance <br />shall meet the following requirements: temperature of heated air at exit or orifice minimum of 2,800 degrees F. <br />Velocity of exiting heated air minimum of 2,800 fps. The application time and final results of the cleaning are <br />subject to the Engineers approval. <br /> <br />3. SEALING. After the cracks have been properly cleaned, the Contractor shall install a foam backer rod in <br />those cracks wider than 1/4 inch that extends below the bottom to the routed joint. The backer rod shall be <br />compressed to fill the entire width of the crack and shall not protrude up above the bottom of the routed reservoir. <br />The Contractor shall install a bond breaker tape at the bottom of the routed reservoir for those cracks less than 1/4 <br />inch in width which extended below the bottom of the routed joint.