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The National Academies

NCHRP Synthesis 20-05/Topic 08-11 [Final (Synthesis)]

Relationship of Asphalt Cement Properties to Pavement Durability
[ NCHRP 20-05 (Synthesis of Information Related to Highway Practices) ]

  Project Data

In recent years, apparent changes have evolved in the physical properties of asphalt cements used in pavement construction. Some of these properties are not controlled or are controlled only partially by AASHTO specifications. This report of the Transportation Research Board reviews all available information relating durability and performance of asphaltic concrete mixtures to the properties of the asphalt cement. Recommendations for improved test procedures and criteria are included. The report concludes that hardness of the asphalt is the property most important to pavement performance.  The report for this topic can be purchased at http://www.trb.org/news/blurb_detail.asp?id=3497

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