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Washington State DOT Issues Comprehensive Pavement Preventative Maintenance Study

from AASHTO Journal

A six-year study of hot mix asphalt preventive maintenance techniques conducted by the Washington State Department of Transportation indicates that a range of "treatments" can effectively extend pavement life, using a combination of crack sealing, chip sealing and dig outs can extend pavement life for five years or more. The 115-page study aimed to determine the effectiveness of a rage of preventive maintenance treatments at extending pavement life, WSDOT said, using cost data to help define which treatments are the most cost effective. Roughly 69 test sites were evaluated on a yearly basis since initiation of the study in 2012, with the evaluations terminated in the fall of 2017. more

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