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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>Unconfined Compressive Strength of Fly Ash–Lime–Gypsum Composite Mixed with Treated Tire Chips</title>
      <link>https://trid.trb.org/View/1112439</link>
      <description><![CDATA[The paper presents the potential and effect of treated tire chips on the unconfined compressive strength in the reference mix containing fly ash, lime, and gypsum. Dry, sodium hydroxide–, and carbon tetrachloride–treated tire chips were used in the study. The tire chip content varied from 5 to 15%. The specimen prepared was cured for 7, 28, 90, and 180 days with three different curing methods (in a dessicator, burlap, and water-filled container). The results indicated that the unconfined compressive strength of the reference mix with dry tire chips can be increased by treatment with carbon tetrachloride and sodium hydroxide. The increase in unconfined compressive strength was highest with carbon tetrachloride treatment. The results further revealed that the increase in unconfined compressive strength was highest when cured in water-filled container, followed by burlap and dessicator. The unconfined compressive strength increased with curing period, and the increase was significant up to a curing period of 90 days. With the increase in tire chip content (5 –15%) in the reference mix, there was a decrease in the unconfined compressive strength. This decrease in the unconfined compressive strength was highest when cured in water-filled container, followed by burlap and dessicator. The reference mix with treated tire chips may be used for road subbase with light traffic.]]></description>
      <pubDate>Wed, 19 Oct 2011 12:52:52 GMT</pubDate>
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      <title>Thermal Sensitivity and Fatigue Life of Gap-Graded Asphalt Mixes Incorporating Crumb Rubber from Waste Tires</title>
      <link>https://trid.trb.org/View/777155</link>
      <description><![CDATA[The most usual asphalt mixture for thin overlays in Spanish roads is produced with a gap-graded combination of aggregates and a polymer modified binder. Nevertheless reflective cracking usually affects the overlay so that the surface of the pavement starts showing the existing network of cracks within a short period of time. The brittleness of the asphalt mixture at low temperatures and the aging of the mixtures promote the appearance and progress of the cracks. On the other hand, the correlation between the fatigue resistance of the mixture and its resistance to reflective cracking has been extensively reported. Asphalt mixes with rubber from waste tires are believed to have a high performance in the control of reflective cracking. This paper presents a study carried out on five gap-graded asphalt mixtures, where three of them containing rubber from discarded tires. Every mixture was tested at two different degrees of aging. Dynamic moduli at several temperatures ranging from -15ºC to 40ºC as well as the fatigue life of each mixture at 20ºC were measured and the results are offered to researchers to help them to build realistic models to study reflective cracking according with the real characteristics of the materials.]]></description>
      <pubDate>Wed, 23 Aug 2006 07:59:31 GMT</pubDate>
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      <title>STABILIZATION OF A VERTICAL TIRE CHIP EMBANKMENT WITH GEOGRIDS</title>
      <link>https://trid.trb.org/View/670586</link>
      <description><![CDATA[A research project that involves the construction of a full-size geogrid-reinforced test embankment was conducted.  Waste tire chips were used as the lightweight backfill for the embankment. The joint research project involved participants from government agencies, academic research institutes, consulting firms, and material suppliers.  To meet the function requirements, the north side of the embankment had to be built essentially as a vertical wall.  To maintain stability, the vertical side of the embankment was reinforced with geogrids and covered with segmental retaining-wall facing.  The objectives of the research study were to evaluate the feasibility of using waste tire chips as embankment backfill material when coupled with geogrid reinforcement and to evaluate the performance of various types of geosynthetic drainage products in the test embankment.  To minimize settlement due to compression of the tire chips, various combinations of tire chips and soil mixtures or interlayers were used in the embankment construction.  The details of the design and construction of the test embankment are described.  Performance of the test embankment is evaluated based on available observation data.]]></description>
      <pubDate>Thu, 16 Nov 2000 00:00:00 GMT</pubDate>
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