Washington State I-90 Pavement Rehabilitation Using Precast Concrete Pavement
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Washington State I-90 Pavement Rehabilitation Using Precast Concrete Pavement

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    Final Report
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    Repair and rehabilitation of the aging highway infrastructure continues to be a challenging endeavor for all U.S. highway agencies. Thousands of miles of highway pavements need rehabilitation, and many of these highways carry over 100,000 vehicles/day, including a large percentage of trucks. Extended lane closures must be avoided to prevent compounding congestion—which means rehabilitation work must be completed rapidly. While many projects have been completed using rapid-setting concrete, results have been inconsistent. Precast concrete pavements (PCPs) have been shown to be promising alternatives. The production use of PCP has come a long way over the last 17 years. The technology is gaining wider acceptance in the U.S. for rapid repair and rehabilitation of concrete pavements as well as for heavily trafficked asphalt concrete pavements and intersections. Several U.S. highway agencies have implemented the PCP technology, and other agencies have constructed demonstration projects. In the U.S., the PCP technology is being used for intermittent repairs (full-depth joint repairs or full panel replacement) and for continuous applications (longer length/wider area rehabilitation) with service life expectations of at least 20 years for intermittent repairs and at least 40 years for continuous applications, without significant future corrective treatment. The Strategic Highway Research Program 2 (SHRP2) Project R05 was conducted from 2008 to 2012 to develop technical information and guidelines that would encourage the rapid and successful adoption of PCP technology. Since 2013, the Federal Highway Administration (FHWA) in partnership with the American Association of State Highway and Transportation Officials has been supporting transportation agencies with implementation of PCP. During 2017, the Washington State Department of Transportation (WSDOT) was awarded a grant of $1,000,000 under FHWA’s Accelerated Innovation Deployment (AID) Program to help offset the cost of constructing a PCP project. This case study report provides details of the 2019 PCP use for rehabilitation of the distressed eastbound concrete pavement along sections of I-90 near Issaquah, Washington. WSDOT has a critical need to develop effective, longlasting concrete pavement rehabilitation tools that can be rapidly applied along sections of heavily-trafficked I-5 in the Seattle metropolitan area. The experience gained with the implementation of PCP along I-90 will guide WSDOT as to how use of PCP can be optimized for use along I-5 in the Seattle area.
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    Contracting Officer’s Representative: Sam Tyson, P.E.
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