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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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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>Evaluation of Hybrid Binder Use in Asphalt Mixtures in Louisiana</title>
      <link>https://rip.trb.org/View/1948609</link>
      <description><![CDATA[Currently, the Louisiana Department of Transportation and Development (LaDOTD) primarily
relies on Styrene-Butadiene-Styrene (SBS) modified asphalt binders to produce and place asphalt
mixtures that resist climate- and load-induced distresses on relatively higher-volume roads and
facilities. Yet, recent studies indicated supply shortage of styrene-butadiene polymers for the
asphalt industry and recommended that alternate asphalt modifiers be considered during supply
shortages, including a very interesting alternative: hybrid binders. This study aims to identify and
evaluate whether different hybrid binders can perform competitively versus other modified
asphalts currently used in Louisiana’s highway applications. This study will also assess the
feasibility of using Hybrid Rubber Modified Asphalt (HRMA) mixtures in Louisiana through
laboratory testing and structural analysis to predict the field performance of these mixtures. The
implementation of this research will reduce the fatigue and rutting distresses in asphalt
pavements, which are common problems in South-Central United States. The results of this
research will be used to implement and optimize the use of HRMA mix in asphalt pavements in
South-Central United States, and to reduce costs. This research will impact state DOTs, highway
contractors, transportation, and the public at large.]]></description>
      <pubDate>Fri, 06 May 2022 11:45:32 GMT</pubDate>
      <guid>https://rip.trb.org/View/1948609</guid>
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      <title>Rubberized Asphalt Cement Evaluation</title>
      <link>https://rip.trb.org/View/1227852</link>
      <description><![CDATA[The objective of this project is to evaluate a new rubber asphalt cement in terms of asphalt cement material specifications and performance in hot-mix.  This product can be used as a binder for sealing and in hot-mix.  The fatigue resistance can be 5 to 10 times better than a normal hard AC as well as it is likely to have a good rutting resistance.  Increased performance would allow thinner lifts be laid with good performance.]]></description>
      <pubDate>Thu, 03 Jan 2013 13:08:05 GMT</pubDate>
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