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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>EIGHT-YEAR PERFORMANCE EVALUATION OF AN ASPHALT-RUBBER HOT MIX PAVEMENT</title>
      <link>https://trid.trb.org/View/349151</link>
      <description><![CDATA[In October 1980, the Connecticut Department of Transportation (ConnDOT) placed an experimental 900-ft section of asphalt-rubber hot mix bituminous pavement on state route 79 in Madison, Connecticut.  Finely ground rubber was supplied by the Arizona Refining Company and was blended with the asphalt (grade AC-20) in the ratio of 1/5 (20% rubber).  The pavement was placed as a 1.5-in. thick overlay in one lift using conventional paving techniques.  A standard ConnDOT class 2 bituminous pavement was placed at the same time and used as a control section.  Engineers from ConnDOT's Division of Research monitored the surface condition, skid resistance and roughness during the period from October 1980 to August 1986, and again in June/July 1989.  In September 1986, it was concluded and published in a six-year evaluation report that the asphalt-rubber pavement was performing better than the standard ConnDOT class 2 control mix.  The conclusion was drawn primarily on the basis of the difference in the amount of longitudinal cracking that had developed during the six-year observation period.  An eight-year evaluation made this past summer indicates that current conditions parallel those reported in 1986.  On the basis of transverse, longitudinal and alligator cracking, the asphalt-rubber mix continues to perform better than the control section.  Both the skid resistance and roughness values remain at acceptable levels and are similar for the control and experimental pavements.]]></description>
      <pubDate>Thu, 31 Jan 1991 00:00:00 GMT</pubDate>
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