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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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      <link>https://trid.trb.org/</link>
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    <item>
      <title>Effect of Mix Temperature</title>
      <link>https://trid.trb.org/View/1285623</link>
      <description><![CDATA[No abstract]]></description>
      <pubDate>Mon, 27 Jan 2014 10:11:56 GMT</pubDate>
      <guid>https://trid.trb.org/View/1285623</guid>
    </item>
    <item>
      <title>Effects of Asphalt Cement Viscosity at Mixing Temperature on Properties of Bituminous Mixtures</title>
      <link>https://trid.trb.org/View/1285622</link>
      <description><![CDATA[No abstract]]></description>
      <pubDate>Mon, 27 Jan 2014 10:11:56 GMT</pubDate>
      <guid>https://trid.trb.org/View/1285622</guid>
    </item>
    <item>
      <title>Effects of Aggregate Temperature on Properties of Bituminous Mixtures</title>
      <link>https://trid.trb.org/View/1285620</link>
      <description><![CDATA[No abstract]]></description>
      <pubDate>Mon, 27 Jan 2014 10:11:34 GMT</pubDate>
      <guid>https://trid.trb.org/View/1285620</guid>
    </item>
    <item>
      <title>Temperature in bituminous mixtures</title>
      <link>https://trid.trb.org/View/1178549</link>
      <description><![CDATA[]]></description>
      <pubDate>Fri, 24 Aug 2012 01:51:38 GMT</pubDate>
      <guid>https://trid.trb.org/View/1178549</guid>
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      <title>EFFECTS OF TIME AND TEMPERATURE ON HARDENING OF ASPHALTS</title>
      <link>https://trid.trb.org/View/101153</link>
      <description><![CDATA[FIGURES ARE PRESENTED WHICH SHOW THE EFFECTS OF MIXING TIME AND TEMPERATURE ON THE PENETRATION OF THE RECOVERED ASPHALT. MOST STUDIES OF ASPHALT HARDENING INVOLVE THE RECOVERING OF THE ASPHALT FROM THE PAVING MIXTURE AND THE MIXING OF PENETRATION TESTS. SINCE THERE IS CONSIDERABLE QUESTION WHETHER A DROP IN PENETRATION NECESSARILY IMPLIES A CORRESPONDING LOSS IN QUALITY, CALIFORNIA HAS DEVELOPED AN ABRASION TYPE OF TEST WHICH IS INTENDED TO EVALUATE BRITTLENESS. IT CAN BE SHOWN THAT TWO ASPHALTS OF THE SAME PENETRATION MAY VARY CONSIDERABLY IN BRITTLENESS AS REPRESENTED BY THE LOSS UNDER AN ABRASION TYPE OF TEST. TEST RESULTS PRESENTED SHOW THAT THE RATE OF HARDENING UNDER ATMOSPHERIC TEMPERATURES AFTER MIXING IS VIRTUALLY UNAFFECTED BY THE AMOUNT OF HARDENING DEVELOPED DURING THE MIXING CYCLE. ALL THE STUDIES HAVE CONFIRMED THE EVIDENCE THAT THERE IS NO FIXED RELATIONSHIP BETWEEN THE SUSCEPTIBILITY OF ASPHALTS IN THE MIXER AT HIGH TEMPERATURES AND THE CHANGES THAT TAKE PLACE ON THE ROAD AT ATMOSPHERIC TEMPERATURES.]]></description>
      <pubDate>Thu, 25 Aug 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101153</guid>
    </item>
    <item>
      <title>THE EFFECTS OF PUGMILL STRUCTURE AND ASPHALT SPRAYING MECHANISM ON THE MIXING AND PROPERTIES OF THE MIXTURE</title>
      <link>https://trid.trb.org/View/101154</link>
      <description><![CDATA[A NATIONAL EXPERIMENTAL STUDY IS BEING CONDUCTED BY THE BUREAU OF PUBLIC ROADS TO TRY TO SETTLE ON UNIFORMITY OF MIXING VOLUME AND MIXING TIME REQUIREMENTS IN CEMENT CONCRETE PAVING WORK. A BRIEF REVIEW IS PRESENTED OF THE FOLLOWING TYPES OF MIXERS: THE BATCH MIXER, CONTINUOUS MIXERS, IMPACT MIXERS AND ROTARY DRUM TYPE MIXERS. MORE AND BIGGER BATCHES PER HOUR, AFTER ALL OF THE LOST MOTION IN BATCHING IS ABSORBED, MEANS STRETCHING MIXER EFFICIENCY AND TRIMMING THE TOTAL DRY AND WET MIXING TIME. MIXING TIME IS THE ONLY RELIABLE MEASURE OF MIX CONTROL AVAILABLE. IF A METHOD IS NATIONALLY ESTABLISHED OF RATING EFFECTIVENESS OF MIXING, THE MIXING TIME REQUIREMENTS COULD BE ELIMINATED. REGARDLESS OF THE TYPE OF MIXER USED, THE MIXING ITSELF IS DONE IN A TWIN-SHAFT PUG MILL.]]></description>
      <pubDate>Thu, 25 Aug 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101154</guid>
    </item>
    <item>
      <title>THE EFFECTS OF PUGMILL STRUCTURE AND ASPHALT SPRAYING MECHANISMS ON THE MIXING AND PROPERTIES OF MIXTURES</title>
      <link>https://trid.trb.org/View/101155</link>
      <description><![CDATA[THE ASPHALT PUGMILL MIXING PROCESS IS DISCUSSED. THE FOLLOWING FUNDAMENTAL PROPERTIES AFFECT THE MIXING PROCESS: (1) CONSISTENCY OR APPARENT VISCOSITY AT MIXING VISCOSITIES, (2) THE SPECIFIC GRAVITIES OF THE VARIOUS PHASES, (3) EASE OF WETTING OF THE SOLID PHASE BY THE LIQUID PHASE, (4) SURFACE TENSION OF THE LIQUID PHASE, (5) RANGE OF PARTICLE SIZE VARIATION, (6) VARIATION OF CONSISTENCY OR VISCOSITY DURING THE MIXING, AND (7) RELATIVE PROPORTIONS OF MATERIALS AND THEIR ORDER OF ADDITION TO THE MIXTURE. PUGMILL CAPACITY AND DESIGN ARE DISCUSSED. FACTORS WHICH NEED TO BE INVESTIGATED IN PUGMILL DESIGN ARE DISCUSSED. UNIFORM MIXTURES AND SAMPLING PRACTICES ARE DISCUSSED. A NEED FOR CONSIDERED EFFORTS WITHIN THE ASPHALT PAVING INDUSTRY TO DEVELOP CRITERIA UPON WHICH TO BASE DESIGN OF EQUIPMENT, OPERATING CHARACTERISTICS, AND SPECIFICATIONS FOR THE ASPHALT MIXING PROCESS IS CONCLUDED.]]></description>
      <pubDate>Thu, 25 Aug 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101155</guid>
    </item>
    <item>
      <title>EFFECT OF MIX TEMPERATURE</title>
      <link>https://trid.trb.org/View/101156</link>
      <description><![CDATA[COMPACTION OF BITUMINOUS MIXTURES AT VARIOUS TEMPERATURES WERE STUDIED. IT WAS FOUND THAT THE STUDY OF COMPACTION TEMPERATURES COULD BE CONDUCTED AT A HIGHER DEGREE OF CORRELATION WHEN COMPACTED IN A LABORATORY BY THE MARSHALL METHOD THAN BY CORES FROM ACTUAL PAVEMENT CONSTRUCTION. THE FOLLOWING RELATIONSHIPS ARE SHOWN TO COMPACTION TEMPERATURE: (1) SPECIFIC GRAVITY, (2) PERCENT VOIDS, (3) MARSHALL STABILITY AND (4) HVEEM STABILOMETER VALUES. ALL TESTS INDICATE THE IMPORTANCE OF COMPACTION AT HIGH TEMPERATURES. VARIOUS COMPACTION EQUIPMENT IS DESCRIBED. IT IS BELIEVED THAT A MUCH MORE PRACTICAL LIMITATION ON THE CONSTRUCTION SEASON IN NORTHERN CLIMATES WOULD BE TO SPECIFY ROLLING TEMPERATURES TOGETHER WITH SEASONAL LIMITATIONS, THAN BY MERELY LIMITING THE PAVING SEASON TO CALENDAR DATES.]]></description>
      <pubDate>Thu, 25 Aug 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101156</guid>
    </item>
    <item>
      <title>THE EFFECTS OF AIR AND BASE TEMPERATURE ON COMPACTION</title>
      <link>https://trid.trb.org/View/101158</link>
      <description><![CDATA[AN INVESTIGATION WAS CONDUCTED IN LOUISIANA BECAUSE THE EXTENT OF COLD WEATHER CONSTRUCTION OF HOT MIX ASPHALTIC CONCRETE PAVEMENT HAD SHOWN CONSIDERABLE INCREASE. RESULTS OF THE SURFACE COURSE INVESTIGATION SHOW A DEFINITE RELATIONSHIP BETWEEN AIRBASE TEMPERATURE AND PERCENTAGE OF COMPACTION. A CURVE IS PRESENTED WHICH REPRESENTS MARSHALL STABILITY-TEMPERATURE RELATIONSHIP AT THE END OF A 6-MONTH PERIOD. AN ADDITIONAL STUDY WAS CONDUCTED TO ESTABLISH AN APPROXIMATE RELATIONSHIP BETWEEN THE AIR AND BASE TEMPERATURES UNDER DIFFERENT WEATHER CONDITIONS. THIS STUDY INDICATED THAT: (1) THE AIR TEMPERATURE NEVER EXCEEDS THE BASE TEMPERATURE ALTHOUGH IN COLD AND CLOUDY WEATHER THE BASE TEMPERATURE IS ONLY SLIGHTLY HIGHER THAN AIR TEMPERATURE, (2) BASE TEMPERATURE OF ASPHALTIC CONCRETE PAVEMENT IS ALWAYS HIGHER THAN PORTLAND CEMENT CONCRETE PAVEMENT, AND (3) ON BRIGHT AND SUNNY DAYS THE SURFACE TEMPERATURE OF PORTLAND CEMENT CONCRETE PAVEMENT IS NORMALLY 15 TO 20 DEGREES HIGHER THAN THE AIR TEMPERATURE, AND ASPHALTIC CONCRETE WAS 25 TO 30 DEGREES HIGHER.]]></description>
      <pubDate>Thu, 25 Aug 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101158</guid>
    </item>
    <item>
      <title>TEMPERATURE-VISCOSITY RELATION OF ASPHALTS USED IN THE UNITED STATES</title>
      <link>https://trid.trb.org/View/101151</link>
      <description><![CDATA[VISCOSITY DATA ARE PRESENTED ON ASPHALT CEMENTS PRODUCED IN THE UNITED STATES FOR USE IN HIGHWAY CONSTRUCTION. ALL PROPERTIES WERE STUDIED BY THE BUREAU OF PUBLIC ROADS TO PROVIDE INFORMATION ON THE PROPERTIES OF ASPHALT PRODUCED FROM VARIOUS CRUDE SOURCES AND BY METHODS OF REFINING IN CURRENT USE. STATES HAVE DIFFERENT SPECIFICATION REQUIREMENTS FOR FUROL VISCOSITY AT CERTAIN TEMPERATURES. FUROL VISCOSITY TESTS WERE MADE ON THE ASPHALTS OF THIS STUDY. THE FUROL VISCOSITY OF 119 ASPHALTS RANGES FROM 85 TO 318 SECONDS. FOUR ASPHALTS HAVE VISCOSITY VALUES LESS THAN 100 SECONDS, WHILE TWO ASPHALTS MORE THAN 300 SECONDS. VISCOSITY OF 80 ASPHALTS IS WITHIN THE RANGE OF 150 TO 250 SECONDS. IT WAS CONCLUDED THAT THE VISCOSITY VARIES GREATLY AND THIS PROPERTY SHOULD BE RECOGNIZED IN PLANT MIXING OF ASPHALTIC MIXTURES, SPREADING AND COMPACTING OF THE MIXTURES ON THE ROAD, AND APPLICATION OF ASPHALTS BY SPRAYING.]]></description>
      <pubDate>Wed, 17 Aug 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101151</guid>
    </item>
    <item>
      <title>TEMPERATURE IN BITUMINOUS MIXTURES, INTRODUCTION</title>
      <link>https://trid.trb.org/View/101219</link>
      <description><![CDATA[TEMPERATURE IS AN IMPORTANT FACTOR IN ASPHALT PAVEMENT CONSTRUCTION. THE EFFECTS OF TEMPERATURE MUST BE VIEWED FROM SEVERAL STANDPOINTS: (1) ITS EFFECT ON THE MIX CONSTITUENTS WHICH CHANGES THE VISCOSITY, THE WETTING ENERGY, AND PERHAPS SOME OF THE PROPERTIES OF THE AGGREGATE WHICH AFFECT BOTH THE SPREADING AND ABSORPTION OF THE ASPHALT, (2) ITS EFFECT ON THE MIXING, LAYING AND COMPACTION OPERATIONS AS A RESULT OF THESE CHANGES IN THE PROPERTIES OF THE MIX CONSTITUENTS, AND (3) THE RATE OF TRAFFIC DENSIFICATION. THE DISCUSSION TOPICS ARE PRESENTED: TEMPERATURE OF MATERIALS, EFFECTS OF TEMPERATURE ON MIXING, AND ON COMPACTION.]]></description>
      <pubDate>Mon, 27 Jul 1970 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101219</guid>
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