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Effectiveness of Cape Seal Pavement Preservation Technique in Northern Nevada
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This report presents the results of a research study funded by SOLARIS University Transportation Center. The research evaluated the long-term performance of cape seals with micro-surfacing and slurry seal in the Truckee Meadows and Incline Village areas of Northern Nevada. The analysis of the data generated from this research led to the following findings and recommendations: • Among the six factors that were evaluated (Construction, Materials, Traffic, Structure, Environment, and Pre-PCI) only the pre-PCI (PCI prior to application of cape seal) value had a significant impact on the longterm performance of the cape seals. • Micro-surfacing cape seals exhibited very consistent long-term performance regardless of the conditions of the existing pavement as expressed by the pre-PCI level. This is shown by the narrow range of the final PCI values of all micro-surfacing cape seals of 70 – 80. • The effective performance life of micro-surfacing cape seals is 7 years in the Truckee Meadows and 5 years in Incline Village. The effective performance life of slurry seal cape seals is 3.5 years in the Truckee Meadows and 3 years in Incline Village. • The LCCA indicates that the micro-surfacing cape seal is more cost effective than the slurry seal cape seal at both locations of Truckee Meadows and Incline Village. • Based on the excellent long-term performance and the significantly higher benefit cost ratio of the microsurfacing cape seals as compared to the slurry seal cape seals, road agencies should continue to use the micro-surfacing cape seal as a preventive maintenance treatment.