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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>
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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>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>EFFECT OF LIGHT AND WATER ON THE DEGRADATION OF ASPHALT</title>
      <link>https://trid.trb.org/View/95112</link>
      <description><![CDATA[COATINGS PREPARED FROM TWO BLOWN PETROLEUM ASPHALTS IN A THICKNESS RANGE OF 0.002 TO 0.04 INCHES WERE EXPOSED TO ACCELERATED TEST CONDITIONS AND OUTDOORS. WHEN EXPOSED TO LIGHT ONLY, A SURFACE FILM, INSOLUBLE IN COMMON ASPHALT SOLVENTS, WAS FORMED. THE FORMATION OF THIS SURFACE FILM WAS ACCOMPANIED BY A GAIN IN WEIGHT OF THE COATINGS, APPARENTLY DUE TO AN OXYGEN PICKUP. THIS SURFACE FILM RETARDED FURTHER DEGRADATION OF THE MALTENES DURING THE EXPOSURES MADE TO LIGHT ONLY. WHEN THE COATINGS WERE IMMERSED IN WATER AFTER EXPOSURE, OR SPRAYED WITH WATER DURING EXPOSURE, OR EXPOSED OUTDOORS, THEY LOST WEIGHT. THESE DECREASES IN WEIGHT WERE FOUND TO BE IN PART DUE TO THE EXTRACTION OF WATER-SOLUBLE, LIGHT-DEGRADED MATERIAL. THEIR MAGNITUDES WERE DEPENDENT UPON THE ASPHALT EXPOSED, THE THICKNESS OF THE EXPOSED COATINGS, AND EXPOSURE CONDITIONS. THE RELATIONSHIP BETWEEN THE LOSSES IN WEIGHT AND WATER-SOLUBLE MATERIAL, WHEN CONSIDERED IN CONJUNCTION WITH THE OXYGEN CONTENT OF THE ASPHALTS AND THE WATER-SOLUBLE MATERIALS, INDICATED THAT VOLATILE DEGRADATION PRODUCTS WERE ALSO FORMED.]]></description>
      <pubDate>Fri, 10 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95112</guid>
    </item>
    <item>
      <title>RECRYSTALLIZATION AND MELTING OF PARTIALLY MELTED STARK RUBBER</title>
      <link>https://trid.trb.org/View/106675</link>
      <description><![CDATA[TWO SPECIMENS FROM A PIECE OF STARK RUBBER WHICH HAD A MELTING TEMPERATURE ORIGINALLY AT 41 C WERE PARTIALLY MELTED AT 38 C AND ALLOWED TO STAND FOR 11 YEARS, ONE AT ABOUT 25 C, THE OTHER AT 38 C. THE FIRST SHOWED A CONTINUOUS SLOW DECREASE IN SPECIFIC VOLUME, WHILE THE SECOND INCREASED SLOWLY IN VOLUME FOR 5 MONTHS AND REMAINED CONSTANT FOR ABOUT 5 MONTHS MORE BEFORE SHOWING THE CONTINUOUS SLOW DECREASE. THE MELTING TEMPERATURE OF THE FIRST INCREASED TO 45 C AND THE MELTING RANGE WAS BROADENED. THE MELTING TEMPERATURE OF THE SECOND BECAME 52 C AND THE RANGE WAS NARROWED. PERFECTING OR ENLARGING OF CRYSTALS AND THE EFFECT OF HIGHER RECRYSTALLIZATION TEMPERATURES HAVE INFLUENCED THE MELTING TEMPERATURES. THE EFFECT OF HEATING RATE IS DISCUSSED IN CONNECTION WITH SLOW INCREASES IN VOLUME, ATTRIBUTED TO RELAXATION OF ORIENTED REGIONS, DURING MELTING. /AUTHOR/]]></description>
      <pubDate>Fri, 03 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106675</guid>
    </item>
    <item>
      <title>THE FAR INFRARED SPECTRUM OF VULCANIZED NATURAL RUBBER</title>
      <link>https://trid.trb.org/View/110161</link>
      <description><![CDATA[EARLIER STUDIES OF THE INFRARED SPECTRA OF NATURAL RUBBER AND SOME VULCANIZATES OF RUBBER HAVE BEEN EXTENDED INTO THE 650 TO 33 CM FAR INFRARED REGION. SOME OF THE ABSORPTION BANDS ORIGINATING IN THE CRYSTALLINE PORTION OF UNVULCANIZED RUBBER HAVE BEEN STUDIED BY USING POLARIZED RADIATION AND SAMPLES ORIENTED BY STRETCHING. VULCANIZATION OF RUBBER WITH SULFUR ALONE PRODUCES A GENERAL WEAKENING OF ALL ABSORPTION BANDS AND NO NEW ABSORPTIONS. VULCANIZATION WITH SULFUR AND AN ACCELERATOR ALSO RESLUTS IN A REDUCTION IN INTENSITY OF THE RUBBER ABSORPTIONS, BUT IS ACCOMPANIED BY THE APPEARANCE OF NEW BANDS. WHEN THE ACCELERATOR IS TETRAMETHYLTHIURAM DISULFIDE (TMTD) THE NEW BANDS ARE PROBABLY INDICATIVE OF A THIOCARBAMATE STRUCTURE. WHEN ZINC DIBUTYLDITHIOCARBAMATE IS USED AS AN ACCELERATOR A BAND PROBABLY DUE TO ZINC SULFIDE OCCURS. VULCANIZATION WITH TMTD ALONE PRODUCES ONLY SLIGHT CHANGES IN THE FAR INFRARED SPECTRUM. HOWEVER, WHEN TMTD IS USED IN THE PRESENCE OF ZINC OXIDE A REACTION OCCURS IN WHICH ZINC DIMETHYLDITHIOCARBAMATE (ZNDMDC) IS FORMED. AFTER VULCANIZATION FOR A SHORT PERIOD OF TIME STRONG TMTD BANDS REMAIN, BUT AFTER LONG VULCANIZATION THE TMTD BANDS ARE REPLACED BY ZNDMDC BANDS. /AUTHOR/]]></description>
      <pubDate>Fri, 03 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110161</guid>
    </item>
    <item>
      <title>A STUDY BY POLARIZATION TECHNIQUES OF THE CORROSION RATES OF ALIMINUM AND STEEL UNDERGROUND FOR SIXTEEN MONTHS</title>
      <link>https://trid.trb.org/View/106708</link>
      <description><![CDATA[ONE ALUMINUM AND ONE STEEL SPECIMEN WERE EXPOSED UNDERGROUND FOR 16 MONTHS IN ORDER TO MAKE A RUNNING SURVEY OF THEIR CORROSION RATES AS INFLUENCED BY WEATHER AND TIME. CATHODIC AND ANODIC DATA WERE OBTAINED PERIODICALLY AS A BASIS FOR CALCULATING RATES OF CORROSION. AUTOMATIC POLARIZING AND RECORDING EQUIPMENT, HOUSED INDOORS, WAS USED FOR MAKING THE MEASUREMENTS. THE METHOD IS ADAPTABLE FOR FIELD USE IN MAKING CORROSION RATE OR SOIL CORROSIVITY STUDIES WHERE COMMERCIAL POWER SOURCES ARE NOT AVAILABLE. /AUTHOR/]]></description>
      <pubDate>Sat, 21 May 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106708</guid>
    </item>
    <item>
      <title>LARGE-SCALE, PREPARATIVE PAPER CHROMATOGRAPHY</title>
      <link>https://trid.trb.org/View/110112</link>
      <description><![CDATA[SIMPLIFIED TECHNIQUES ARE DESCRIBED FOR THE USE OF HEAVY PAPERS IN LARGE-SCALE, PREPARATIVE CHROMATOGRAPHY. A NEW TECHNIQUE IS ILLUSTRATED FOR NONDESTRUCTIVELY LOCATING BANDS OF COMPOUNDS ON WET CHROMATOGRAMS.  CAPACITIES AND BEHAVIOR CHARACTERISTICS OF WHATMAN SEED-TEST PAPER AND WHATMAN NO. 17 PAPER ARE ILLUSTRATED. /AUTHOR/]]></description>
      <pubDate>Tue, 22 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110112</guid>
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