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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
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      <title>NATURAL FIBER REINFORCED CONCRETE</title>
      <link>https://trid.trb.org/View/308742</link>
      <description><![CDATA[In recent years, several investigations have been reported on the strength and behavior of concrete reinforced with natural fibers.  Since natural fibers are available in abundant quantities in many developing countries, more elaborate research should be directed toward the various problems associated with the use of these fibers.  This paper presents a critical review of the factors that affect the properties and behavior of natural fiber reinforced concrete (NFRC).  Test results for concretes obtained by using water blended with yeast granules are also reported in this paper.]]></description>
      <pubDate>Sat, 30 Jun 1990 00:00:00 GMT</pubDate>
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      <title>PERMANENT DEFORMATION OF FLEXIBLE PAVEMENTS</title>
      <link>https://trid.trb.org/View/162470</link>
      <description><![CDATA[Seven pairs of pavement with granular bases were tested under controlled conditions. One pavement in each pair contained fabric inclusions. An improved testing facility was developed, including: (1) servo-hydraulic system for the loading carriage; (2) amplification and read-out system for pressure cells; (3) linearizing unit for strain coils; (4) transducers for measuring vertical and resilient deflection; (5) techniques for measuring in situ strain on fabric inclusions; (6) extensive use of nuclear density meter to monitor pavement and foundation materials. The following conclusions are drawn: (1) No improvement in performance resulted from fabric inclusions. (2) No consistent reduction in in-situ stresses, resilient strains, or permanent strains was observed as a result of fabric inclusion. (3) No consistent improvement in densities resulted from fabric inclusions. (4) Some slip apparently occurred between fabric and soil on those pavements which involved large deformations. The slip occurred between fabric and crushed limestone base rather than between fabric and silty-clay subgrade. (Author)]]></description>
      <pubDate>Wed, 18 Feb 1981 00:00:00 GMT</pubDate>
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      <title>COMPARISON OF SOIL MODULI OBTAINED FROM NON-DESTRUCTIVE DYNAMIC TESTING AND CONSTITUTIVE EQUATIONS</title>
      <link>https://trid.trb.org/View/75480</link>
      <description><![CDATA[This report describes an effort to determine the degree of agreement between moduli of airfield granular base materials as measured by a non-destructive (vibratory) pavement evaluation procedure and as predicted from constitutive equations that relate moduli to states of stress induced in the granular material by aircraft loading. The results indicated that for the tensile state of stress that is induced by heavy aircraft loads, Young's modulus of the granular materials considered in the study was approximately inversely proportional to the square root of the state of stress. This could be postulated from the knowledge that for compressive state of stress, Young's modulus is approximately directly proportion to the square root of the state of stress. It was concluded that the moduli of the pavement granular base materials studied which were measured in the field in the Air Force non-destructive pavement evaluation procedure and then reduced to account for low strain levels are in agreement with the moduli determined from empirical constitutive equations. (Author)]]></description>
      <pubDate>Wed, 31 Oct 1979 00:00:00 GMT</pubDate>
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