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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>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
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    <item>
      <title>SOIL STABILIZATION WITH MIXED BINDERS</title>
      <link>https://trid.trb.org/View/121759</link>
      <description><![CDATA[COMPARATIVE LABORATORY EXPERIMENTS ARE DESCRIBED REGARDING THE STABILIZATION OF VARIOUS TYPES OF SOIL WITH CEMENT, BUNA-LIME AND A MIXED BINDER BASED ON A LOW GRADE BLAST-FURNACE CEMENT. BESIDES CLEAN NON-BINDING AND ORGANICALLY UNCLEAN SOILS, A BINDING MATERIAL AND A CRUSHED SAND WERE TESTED. THE PRESSURE AND SPLITTING RESISTANCE WERE MEASURED ACCORDING TO THE AIR AND WATER CONTENT, AND A WET- DRY TEST, A FREEZING AND DEFROSTING TEST, AND A WEATHERING TEST. WITH NON-BINDING MATERIALS, LOW BUT SUFFICIENT DENSITIES WERE YIELDED AS COMPARED TO CEMENT STABILIZATION. VERY SILTY SOILS AND CRUSHED SAND REQUIRE A HIGHER CONTENT OF BINDING AGENTS, AND WITH SOILS WHICH ARE ORGANICALLY UNCLEAN, THE MIXED BINDER IS UNSUITABLE. NO DEFINITE CONNECTION BETWEEN THE STANDARD DENSITY OF THE MIXED BINDER AND THE DENSITY OF THE STABILIZATION WAS ESTABLISHED. THE SPEED OF HARDENING AND THE WEATHER RESISTANCE DEPEND ON THE REACTION OF THE BINDING AGENT WITH THE SOIL AND REQUIRE IN EACH CASE NEW SUITABILITY EXPERIMENTS. /FG/RRL/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:40:42 GMT</pubDate>
      <guid>https://trid.trb.org/View/121759</guid>
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    <item>
      <title>PENETRATION AND VISCOSITY FUNCTIONS IN BITUMINOUS CONCRETE</title>
      <link>https://trid.trb.org/View/97709</link>
      <description><![CDATA[THREE EXPERIMENTAL PROJECTS, EACH APPROXIMATELY FOUR MILES IN LENGTH, WERE RESURFACED WITH ASPHALT CONCRETE. DIFFERENT GRADES AND TYPES OF ASPHALTS VARYING BETWEEN 60 AND 150 PENETRATION, WITH VISCOSITIES RANGING FROM 885 TO 3198 POISES AT 140 F WERE USED. FIVE TO EIGHT DIFFERENT ASPHALTS WERE USED IN EACH PROJECT. ONE TYPE AGGREGATE ONLY, LIMESTONE, GRAVEL, OR CRUSHED SAND WAS USED IN AN INDIVIDUAL PROJECT. THE OBJECTIVE OF THESE EXPERIMENTAL PROJECTS WAS TO DETERMINE VISCOSITY-PENETRATION RELATIONSHIPS, PROPERTIES AND BEHAVIOR OF THE ASPHALT CEMENTS, FUNCTIONS OF VISCOSITY AND PENETRATION IN MIXING, ROLLING AND COMPACTION, AND EVALUATION OF THE DURABILITY OF EACH ASPHALT. IN ONE PROJECT WHERE A WELL GRADED ANGULAR LIMESTONE WAS USED, NO DIFFICULTY WAS ENCOUNTERED, IN LAYING AND COMPACTION REGARDLESS OF THE TYPE OF ASPHALT WHEN THE MIXING WAS ACCOMPLISHED AT 300 F. IN THE PROJECT WHERE GRAVEL WAS USED, THE GRAVEL AND ASPHALT WERE EASILY MIXED AT 300 F. HOWEVER, DIFFICULTY WAS EXPERIENCED IN COMPACTING SOME OF THE MIXTURES AND IT WAS NECESSARY TO ADJUST THE MIX TEMPERATURE TO THE PROPER VISCOSITY IN ORDER TO USE THE DIFFERENT ASPHALTS. IN THE SAND-ASPHALT MIX PROJECT, MIXING TEMPERATURES HAD TO BE ADJUSTED TO ELIMINATE TEARING OF THE ONE MIXTURE CONTAINING ONE OF THE ASPHALTS AND THE TENDERNESS OF THE OTHER DURING LAYDOWN AND COMPACTION. DEPENDING ON THE TYPE OF AGGREGATE IT WAS SHOWN THAT THE VISCOSITY, AND NOT THE PENETRATION, OF THE ASPHALT GOVERNED THE MIXING, LAYING AND COMPACTION OPERATIONS. TESTS WERE CONDUCTED ON THE ORIGINAL ASPHALTS AND ON ASPHALTS EXTRACTED FROM THE MIX AT THE PUGMILL, BEHIND THE PAVER, COMPACTED ROADWAY, AND PERIODIC ROADWAY SAMPLES. RESULTS DISCLOSED THAT ASPHALTENES AND VISCOSITY INCREASED, AND PENETRATION AND DUCTILITY DECREASED IN VALUE WITH TIME. THE ASPHALTS USED IN THE SAND MIX ARE HARDENING AT A FASTER RATE THAN IN THE OTHER TWO JOBS. THE INDIVIDUAL ASPHALTS ARE HARDENING AT DIFFERENT RATES AND SOME OF THE ASPHALTS HAVE NO DUCTILITY AT LOW TEMPERATURES. HOWEVER, VISUAL OBSERVATIONS SHOWED THAT ALL OF THE SURFACES ARE PERFORMING EXCELLENTLY. PERIODIC INVESTIGATIONS OF THE EFFECTS OF THE DIFFERENT ASPHALTS ON DURABILITY IS PROGRAMMED. /AUTHOR/]]></description>
      <pubDate>Sat, 02 Apr 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/97709</guid>
    </item>
    <item>
      <title>THE USE OF GRAVELS FOR BITUMINOUS PAVING MIXTURES</title>
      <link>https://trid.trb.org/View/100776</link>
      <description><![CDATA[THIS PAPER DESCRIBES AN INVESTIGATION MADE OF THE USE OF ROUND AND CRUSHED GRAVEL WITH NATURAL AND CRUSHED QUARRY SANDS IN BITUMINOUS MIXTURES. FIVE MIXTURES OF THE VARIOUS MATERIALS WITHIN A DESIGN GRADATION BAND WERE STUDIED. MARSHALL TESTS, TRIAXIAL SHEAR, SPLITTING STRENGTH TESTS AND LABORATORY RUTTING TESTS WERE USED IN THE INVESTIGATION TOGETHER WITH IMMERSION-COMPRESSION AND HYDRAULIC PERMEABILITY TESTS. RELATIONSHIPS BETWEEN MIXTURE PROPERTIES DETERMINED BY THE VARIOUS METHODS ARE DEVELOPED. A SIGNIFICANT IMPROVEMENT IN MIX PROPERTIES IS SHOWN IN MIXES CONTAINING CRUSHED FINE AGGREGATE. /NAPA/]]></description>
      <pubDate>Tue, 08 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/100776</guid>
    </item>
    <item>
      <title>AGGREGATE SHAPE AND SKID RESISTANCE</title>
      <link>https://trid.trb.org/View/206451</link>
      <description><![CDATA[Natural sands and sands manufactured by crushing larger parent materials are characterized and service tested. Singular attributes are usually confounded with other variables in service tests.  Dry-bulking tests and photomicrography are used to established qualities. High-stability porous mixtures are achieved in laboratory tests.  Crushing some materials to coarse chip sizes leaves many smooth facets on particles that then tend to become oriented horizontally in the pavement surface.  Open-graded friction courses and sprinkle treatments are included. Damage by winter freezing of porous courses is illustrated. (Author)]]></description>
      <pubDate>Wed, 30 Jan 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/206451</guid>
    </item>
    <item>
      <title>INITIAL ROUGHNESS OF ASPHALT WEARING COURSES - POSSIBILITIES OF CONTROL THROUGH MIXTURE COMPOSITION</title>
      <link>https://trid.trb.org/View/159565</link>
      <description><![CDATA[In order to produce initial roughness and grip of asphalt pavements crushed stone sand or fine grit can be sprinkled onto the surface while it is still hot and immediately rolled in, or one can achieve the required grip by adjusting the mixture composition, if enrichment with binder can be avoided.  The second alternative was tried out by laying five stretches of experimental roads using various mix compositions.  Measurements of skidding resistance were undertaken by the University of Berlin, institute for roads using the locked wheel trailer, and wear and deformation measurements by the bast, Cologne. The test roads which were constructed in 1975 showed the following trends: mixtures with high voids content in general had adequate initial roughness - high contents of crushed stone grit are advantageous - dense mixtures do not always have adequate initial roughness because of factors associated with the method of production. In these cases the sprinkling method is recommended. Measures to produce improvements in the initial grip have a favourable influence on the deformation resistance.  The latitude available for such measures is not large if the durability of the pavement is not to be impaired.  The sections of test road are still under observation. (TRRL)]]></description>
      <pubDate>Fri, 06 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/159565</guid>
    </item>
    <item>
      <title>THE USE OF RESIDUE LEFT AFTER CURSHING IN QUARRIES IN ROAD CONSTRUCTION /IN RUSSIAN/</title>
      <link>https://trid.trb.org/View/110468</link>
      <description><![CDATA[RESULTS OF INVESTIGATIONS INTO THE PETROGRAPHIC, CHEMICAL, AND PHYSICOCHEMICAL PROPERTIES OF CRUSHED STONE SAND OBTAINED FROM VOLCANIC ROCK IN FINE CRUSHING PLANTS IN THE UKRAINE ARE PRESENTED. THIS TYPE OF SAND IS EITHER FLAT OR ANGULAR IN SHAPE, CONTAINS 10 TO 17 PER CENT OF CLAYEY-SILT (0.46 TO 2.80 PER CENT CLAY), AND CAN ONLY BE USED IN ROAD CONSTRUCTION IF TREATED. EXPERIMENTAL RESULTS ARE GIVEN SHOWING THE POSSIBLE USE OF CRUSHED STONE SAND IN PAVEMENT LAYERS, IN CONCRETE, ASPHALTIC CONCRETE, AND RAILWAY BALLAST. CRUSHED STONE SAND CAN BE USED IN CONCRETE IF MIXED WITH NATURAL SAND. THE GRADING OF CRUSHED STONE SAND/NATURAL SAND MIXTURES MUST COMPLY WITH GOST SPECIFICATIONS 10.268-62 FOR FINE AGGREGATES. IF PART OF THE FINE NATURAL SAND IN CONCRETE IS REPLACED BY COARSE CRUSHED STONE SAND, THE MECHANICAL STRENGTH OF 28-DAY-OLD CONCRETE INCREASES BY 10 TO 20 PER CENT. THE ECONOMIC ASPECT OF THE USE OF CRUSHED STONE SAND IS CONSIDERED. /LCPC/RRL/]]></description>
      <pubDate>Mon, 12 Jul 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110468</guid>
    </item>
    <item>
      <title>IN DEFENCE OF AGGREGATES /IN FRENCH/</title>
      <link>https://trid.trb.org/View/107093</link>
      <description><![CDATA[THE IMPORTANCE IS EMPHASIZED OF AGGREGATE QUALITY IN ROAD CONSTRUCTION. THE COST OF IMPROVING AGGREGATES WOULD AFFECT ONLY VERY SLIGHTLY THE COST OF THE COMPLETED WORK AND WOULD INCREASE THE DURABILITY OF THE ROAD. THE FOLLOWING IMPROVEMENTS ARE RECOMMENDED: (1) HOMOGENEITY, RATIONALIZATION AND STANDARDIZATION OF AGGREGATE PRODUCTION TOGETHER WITH THOROUGH GRADING, (2) POSSIBILITY OF SELECTING CRUSHED SAND WITH HIGH CONTROLLED FINES CONTENT OR WASHED SAND WITH FILLER ADDED WHEN NECESSARY. (3) CONTROL AND CORRECTION OF MOISTURE CONTENT, ESPECIALLY IN SAND. PRELIMINARY TREATMENT WITH WATER-REPELLANT PRODUCTS AND PROTECTION OF SAND DURING STORAGE WITH PLASTIC FILMS ARE RECOMMENDED, AND (4) SYSTEMATIC SUPPLY OF AGGREGATES, ADEQUATELY LAID OUT STORAGE SPACE, AND EFFICIENT QUALITY CONTROL. /LCPC/RRL/]]></description>
      <pubDate>Mon, 28 Sep 1970 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107093</guid>
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