Asphalt Surface Treatments for Pavement Preservation : Research Project Capsule
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Asphalt Surface Treatments for Pavement Preservation : Research Project Capsule

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      Research project capsule.
    • NTL Classification:
      NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance ;
    • Abstract:
      It is no secret that all levels of government are facing an unprecedented level of defi cit. While revenues are dropping, infrastructure needs are growing with age. The question of sustainability is taking the center stage. Can we aff ord to keep 3 million miles of paved roads in the United States? Pavements must be managed, not just maintained. That means fi nding the most cost-eff ective way. The World Bank’s Pavement Deterioration Model shows that, if a pavement is left to deteriorate, the cost of bringing it back to good condition may be four times the cost of maintaining it at a good/fair condition. Preventative maintenance is one of the most popular ways of managing roadway pavements. Surface treatments fall under “Preventive Maintenance,” which is generally applied to pavements in good condition and without much structural deterioration. Many types of surface treatments are available, including slurry seal, chip seal, micro surfacing, surface rejuvenation, fog seal, and newer types containing cement, polymer, rubber, or other agents. The relatively low cost and simplicity of application helps more agencies use them, especially in times of a low budget. The question is: are road agencies getting their money’s worth on surface treatments? The research conducted under this proposal will examine the state of practice in the United States, particularly the southeast region, with respect to pavement surface treatments. This synthesis study will summarize the results of surface treatment research completed to date, as well as state best practices and implementation status. Findings from this study should be a good reference for agencies that use or intend to use surface treatments, providing useful information on elements such as types of applications, best practices, cost, and documented performance.
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