Deflection Testing and Its Application to Pavement Rehabilitation in Alaska
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1985-01-01
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TRIS Online Accession Number:00396680
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Edition:Final Report
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Abstract:Considering the need to operate Alaska's paved highway system at the lowest possible long term cost, it has become necessary to constantly rebalance the economics of continued maintenance versus reconstruction versus rehabilitation alternatives on all existing pavement structures. Such economic analyses require rational methods for estimating remaining vehicle load life combined with the ability to assess the e long term performance of rehabilitation or maintenance options on any given section of existing road. Boht the initial pavement load life estimates and the rehabilitation performance projections should be based on the very best of available engineering technology. Both should also have a similar theoretical basis. Data and experience accumulated from Alaskan research projects since 1977 have led to the conclusion that deflection basin shape, as measured by the Falling Weight Deflectometer, is a key factor through which pavement rehabilitation economics can be determined. The report focuses on selection and operation of the FWD in Alaska. It also discusses methods for applying FWD data to alternative rehabilitation designs for asphalt concrete pavements and for vehicle load-life estimates. (Author)
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