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The filling of cracks with a hot poured rubberized sealing compound allows for a substantial savings in maintenance costs. Without the proper care for cracks, your once durable pavement surface will have its life expectancy decreased dramatically! Cracks in asphalt pavement, if not sealed properly, will allow water to penetrate the pavement base causing it to lose its structural integrity. As the structural capacity decreases, wheel loads cause excessive deflection of the pavement and alligator cracks occur. This cracking effect will continue to grow if not repaired. Eventually a cracked pieces of asphalt will dislodge and pot holes will form.
SEALANT APPLICATION can be accomplished in a variety of ways. Twelve methods are outlined in the SHRP publication Materials and Procedures for Sealing and Filling Cracks in Asphalt-Surfaced Pavements. The success of each method is not only determined by configuration but also by cleaning technique and sealant selection. Sealants applied in routed cracks performed longer. A recessed configuration dispenses material into the confines of a routed crack. The sealant can be placed flush with the pavement, slightly below the surface of the pavement or slightly overfilled on the surface. In an over-band configuration, the sealant is placed onto and over an unrouted crack. The sealant can be shaped into a band over the crack using a rubber blade squeegee or a sealing shoe that flattens the sealant over the crack.
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