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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>THE INFORMATION BACKGROUND IN THE FIELD OF BIOLOGICAL DETERIORATION OF NONMETALLIC MATERIALS</title>
      <link>https://trid.trb.org/View/106807</link>
      <description><![CDATA[IMPORTANT IN THE CONSIDERATION OF BIOLOGICAL AGENTS IS THE ROLE OF CHEMICAL AND PHYSICAL FACTORS SUCH AS MOISTURE, HEAT, LIGHT, OXYGEN, AND SALTS. CRUCIAL IN DETERMINING THE EXISTENCE OF THE BIOLOGICAL AGENTS AT THE SITE OF THE DETERIORATIVE ACTION, THEY ALSO INFLUENCE THE RATES OF REACTION OF BIOLOGICAL AGENTS ON THEIR SUBSTRATES. FOR THE SUBSEQUENT DISCUSSIONS OF RUBBER, PLASTICS, PAINT, TEXTILES, AND OTHER NONMETALLICS, THIS PAPER WILL SKETCH THE DEVELOPMENT OF SCIENCE IN THIS FIELD. A SECONDARY GOAL WILL COMPRISE OUTLINING METHODS OBTAINING PUBLISHED INFORMATION ON THE SUBJECT. THIS PAPER WILL PROVIDE SOME HISTORY AND DESCRIBE EVENTS DURING AND AFTER WORLD WAR II ASSOCIATED WITH THE DEVELOPMENT OF THE FIELD. TO PERFORM BIODETERIORATION RESEARCH AND DEVELOPMENT, IT IS ESSENTIAL TO KNOW THE WORK DONE IN THE PAST. THE PAPER, THEREFORE, WILL IDENTIFY THE INFORMATION RESOURCES WHICH DEVELOPED CONCOMITANT WITH THE NEEDS OF RESEARCH, DEVELOPMENT, TEST, AND EVALUATION IN THE BIODETERIORATION FIELD. /AUTHOR/]]></description>
      <pubDate>Thu, 23 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106807</guid>
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      <title>THERMAL PERFORMANCE OF AIRCRAFT POLYURETHANE SEAT CUSHIONS</title>
      <link>https://trid.trb.org/View/196797</link>
      <description><![CDATA[Aircraft seat materials were evaluated in terms of their thermal performance.  The materials were evaluated using (a) thermogravimetric analysis, (b) differential scanning calorimetry, (c) a modified NBS smoke chamber to determine the rate of mass loss and (d) the NASA T-3 apparatus to determine the thermal efficiency. In this paper, the modified NBS smoke chamber will be described in detail since it provided the most conclusive results.  The NBS smoke chamber was modified to measure the weight loss of materials when exposed to a radiant heat source over the range of 2.5 to 7.5 W/sq cm.  This chamber has been utilized to evaluate the thermal performance of various heat blocking layers utilized to protect the polyurethane cushioning foam used in aircraft seats. Various kinds of heat blocking layers were evaluated by monitoring the weight loss of miniature seat cushions when exposed to the radiant heat.  The effectiveness of aluminized heat blocking systems was demonstrated when compared to conventional heat blocking layers such as neoprene.  All heat blocking systems showed good fire protection capabilities when compared to the state-of-the-art, i.e., wool-nylon over polyurethane foam.]]></description>
      <pubDate>Fri, 30 Dec 1983 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/196797</guid>
    </item>
    <item>
      <title>NONMETALLIC WATERSTOPS</title>
      <link>https://trid.trb.org/View/63254</link>
      <description><![CDATA[Nonmetallic waterstops having suitable properties for use in joints in hydraulic structures of concrete have been made successfully from natural rubber, synthetic rubber, and polyvinyl chloride. To perform satisfactorily, a waterstop must have sufficient strength and extensibility to avoid being ruptured by joint movement, and it must maintain strength and extensibility over the temperature range and in spite of chemical attack from the environment of service. It must also have suitable dimensions and configuration and be installed so as to avoid waterflow around the embedded ends. Field and laboratory studies have led to the conclusion that suitable waterstop materials should have a tensile strength of at least 1400 psi (plastic), 2000 psi (rubber), the ability to elongate 280 percent (plastic) or 360 percent (rubber), and to have various levels of maintenance of relevant properties after various chemical and thermal exposures.]]></description>
      <pubDate>Sun, 16 Jan 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/63254</guid>
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      <title>PROPERTIES OF THE LONDON CLAY AT THE ASHFORD COMMON SHAFT: IN-SITU AND UNDRAINED STRENGTH TESTS</title>
      <link>https://trid.trb.org/View/140072</link>
      <description><![CDATA[During the construction of the Ashford Common shaft by the Metropolitan Water Board undisturbed block specimens were obtained from six levels at depths varying from 30 to 140 ft in the London Clay.  At the same levels a series of plate loading and penetrometer tests were carried out in the shaft.  In a special boring alongside the shaft a series of Dutch cone penetrometer tests were made and some special samples taken.  The Metropolitan Water Board also made available the results on conventional borehole samples from eight borings in the neighborhood of the shaft.  In this Paper the results of an extensive series of quick undrained compression tests on the block specimens are presented and the undrained shear strength-depth relationships obtained from the several types of laboratory and in-situ tests compared.  These vary considerably and the differences are discussed in terms of the fissured nature of the clay and the effects of excavation.  The penetrometer tests cannot be evaluated satisfactorily. /Author/]]></description>
      <pubDate>Wed, 29 Jan 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/140072</guid>
    </item>
    <item>
      <title>INVESTIGATION OF NON-METALLIC WATERSTOPS. REPORT 7: PREPARATION OF LABORATORY TEST SAMPLES FROM FINISHED WATERSTOPS</title>
      <link>https://trid.trb.org/View/106985</link>
      <description><![CDATA[CORPS OF ENGINEERS SPECIFICATIONS FOR RUBBER AND POLYVINYLCHLORIDE (PVC) WATERSTOPS REQUIRE THAT THE MANUFACTURER FURNISH SHEET MATERIAL FROM THE SAME LOT AS THE FINISHED WATERSTOP FOR ACCEPTANCE TESTING. SINCE THE SHEET SAMPLES HAVE BEEN FOUND IN SOME CASES TO HAVE PROPERTIES DIFFERENT FROM THE FINISHED WATERSTOP, A STUDY WAS MADE TO DETERMINE THE FEASIBILITY OF PREPARING ALL TEST SAMPLES IN THE LABORATORY FROM THE FINISHED WATERSTOP. TWO NATURAL RUBBER AND TWO PVC SPECIMENS WERE TESTED. A MOLDING STUDY WAS ALSO CONDUCTED TO DETERMINE THE OPTIMUM TEMPERATURE-TIME-PRESSURE COMBINATION FOR PREPARING TEST SAMPLES. TEST RESULTS CONFIRMED THAT SHEET SAMPLES SUBMITTED BY THE MANUFACTURER WERE NOT ALWAYS REPRESENTATIVE OF THE FINISHED WATERSTOP AND INDICATED THAT LABORATORY-PREPARED SPECIMENS WERE MORE REPRESENTATIVE. THE PVC SPECIMENS SHOULD BE PREPARED BY MOLDING THE FINISHED WATERSTOP AT 310 F FOR 5 MIN UNDER A PRESSURE OF 1100 PSI. IT WAS FOUND THAT RUBBER SPECIMENS COULD NOT BE MOLDED WITHOUT CHANGING THE PROPERTIES OF THE RUBBER. INSTEAD, RUBBER SPECIMENS SHOULD BE PREPARED BY SLICING AND GRINDING THE FINISHED WATERSTOP. THE TYPE OF EQUIPMENT TO BE USED IN MOLDING, SLICING, AND GRINDING THE WATERSTOP IS DESCRIBED. /AUTHOR/]]></description>
      <pubDate>Sun, 10 Oct 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106985</guid>
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