<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <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>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>OPTICAL PROCESSING OF VECTORIAL ROCK FABRIC DATA</title>
      <link>https://trid.trb.org/View/121073</link>
      <description><![CDATA[VECTORIAL ROCK FABRIC DATA, FROM THE SCALE OF PHOTOMICROGRAPHS TO THAT OF AERIAL PHOTOGRAPHS, CAN BE ANALYZED BY AN OPTICAL DATA-PROCESSING METHOD ALREADY APPLIED TO SEISMIC DATA. EACH PHOTOGRAPH IS REDUCED TO A TRANSPARENCY THAT ACTS AS A DIFFRACTION GRATING THROUGH WHICH LASER LIGHT IS PASSED. THE FREQUENCY DISTRIBUTION OF DIRECTION AND SPACING CAN BE TAKEN DIRECTLY FROM THE RESULTING TWO-DIMENSIONAL FOURIER TRANSFORM. DIRECTIONAL AND SPATIAL FILTERING OF THE ORIGINAL IMAGE CAN BE ACCOMPLISHED BY BLOCKING OUT PARTS OF THE TRANSFORM. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:37:56 GMT</pubDate>
      <guid>https://trid.trb.org/View/121073</guid>
    </item>
    <item>
      <title>FABRIC OF SOIL CEMENTS</title>
      <link>https://trid.trb.org/View/119570</link>
      <description><![CDATA[DUPLICATE TEST CORES OF TWO SOIL-CEMENTS WERE ANALYZED BY DIFFRACTION PATTERNS AND PHOTOMICROGRAPHS OF THIN SECTIONS. THE RESULTS OF COMPRESSIVE STRENGTH TESTS AND DURABILITY TESTS WERE COMPARED WITH RESULTS OBTAINED BY THE AUTHORS. LARGE VOIDS WERE SHOWN TO EXIST IN THE FIRST CORE, WHICH WEAKENED THE SOIL CEMENT AND DECREASED ITS DURABILITY. EFFORTS SHOULD BE MADE TO DECREASE THE VOID SPACE. BY: (1) FURTHER COMPACTION WITH VIBRATION OR COMPACTION THAT INCORPORATES PENETRATION (SHEEPS-FOOT ROLLERS) FOR INITIAL COMPACTION, (2) BY THE ADDITION OF BORROW SOIL THAT HAS HIGHER PROPORTIONS OF BINDER, OR (3) BY INCREASING THE AMOUNT OF PORTLAND CEMENT ADDED. THE FABRIC PROPERTIES OF THE SECOND CORE APPEAR TO BE VERY GOOD FOR MAXIMUM STRENGTH DURABILITY. THE PHYSICAL MIXING IS EXCELLENT BETWEEN THE SOIL AND CEMENT AND THE VOIDS ARE SMALL AND NOT INTERCONNECTED. IT IS CONCLUDED THAT THE PORTLAND CEMENT IN A RELATIVELY (POROUS) AND CHEMICALLY INERT A-3 (0) SOIL UNDERGOES REACTIONS PRODUCING CALCITE WHEREAS THE REACTIONS IN THE A-4 (7) SOIL ARE POSSIBLY SLOWER AND INVOLVE REACTIONS WITH COLLOIDAL ALUMINO-SILICATES WITHOUT CALCITE BEING FORMED. COMPARISONS OF MINERALOGICAL ANALYSES OF THE SOIL PRIOR TO CORE PREPARATION SHOULD BE HELPFUL IN FUTURE STUDIES IN DETERMINING MINERALOGICAL CHANGES INDUCED BY ADDITION OF WATER AND PORTLAND CEMENT.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:24:19 GMT</pubDate>
      <guid>https://trid.trb.org/View/119570</guid>
    </item>
    <item>
      <title>THE GROWTH OF BASIC RESEARCH ON THE PROPERTIES OF CONCRETE IN THE PCA LABORATORIES</title>
      <link>https://trid.trb.org/View/101461</link>
      <description><![CDATA[SINCE 1930, EMPIRICAL RESEARCH IN THE PORTLAND CEMENT ASSOCIATION LABORATORIES HAS GIVEN WAY TO A MORE FUNDAMENTAL APPROACH AND A QUEST FOR NUMBERS HAVING MEANING WITH RESPECT TO STRUCTURE. SCIENTIFIC RESEARCH ON CEMENT CHEMISTRY INDICATED THE POSSIBLE EXISTENCE OF SPECIFIC STRUCTURAL FEATURES THAT WOULD EXPLAIN OBSERVED PROPERTIES OF CONCRETE. BLEEDING AND RHEOLOGICAL PROPERTIES SUPPORTED THIS THEORY. STUDIES FOLLOWED ON THE MECHANISM OF SHRINKING AND SWELLING, THE ROLE OF CAPILLARY FORCE AND OF VISCOUS FRICTION IN BLEEDING AND SHRINKAGE STRESS AND CREEP. APPLICATION OF COLLOID AND CAPILLARY THEORIES TO CONCRETE RESEARCH WAS AN IMPORTANT STEP. A MANY-FACETED PROGRAM OF CEMENT PASTE AND CONCRETE WAS BUILT UP WITH THE PHYSICAL STRUCTURE OF HARDENED PASTE AS THE BACKBONE. THE FIRST PAPER ON MULTIMOLECULAR ADSORPTION, IN 1938, LED TO THE BET METHOD OF MEASUREMENT OF INTERNAL SURFACE AREA. THIS IN TURN LED TO THE STUDY OF ENERGETICS OF ADSORPTION. CONCRETE PROPERTIES COULD FINALLY BE INTERPRETED IN TERMS OF NUMBERS FOUND INSIDE CEMENT PASTE. THE CALORIMETER, X-RAY AND ELECTRON MICROSCOPES PROVIDED ADDITIONAL NUMBERS. STEREOMICROGRAPHS, WHICH ENABLE THE ACTUAL STRUCTURE OF THE HARDENED CEMENT PASTE TO BE SEEN, HAVE NOT REQUIRED A MAJOR CHANGE IN CONCEPTS DEVELOPED BY THE INDIRECT METHODS OF EXPLORATION.]]></description>
      <pubDate>Fri, 18 Nov 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101461</guid>
    </item>
    <item>
      <title>GAS METAL-ARC SPOT WELDING FOR STRUCTURAL STEEL CONNECTIONS</title>
      <link>https://trid.trb.org/View/110168</link>
      <description><![CDATA[SINGLE GAS METAL-ARC SPOT-WELDED LAP JOINTS USED TO JOIN TWO SPECIMENS OF STRUCTURAL STEEL ARE INVESTIGATED. THE STATIC LOAD-CARRYING CAPABILITIES OF THIS TYPE OF JOINT ARE DISCUSSED. THE WELDS PRODUCED BY CARBON DIOXIDE-SHIELDED METAL-ARC WELDING EQUIPMENT WERE STUDIED. THE STATIC STRENGTH CHARACTERISTICS OF THESE WELDS WERE DETERMINED AND WHETHER THEY CAN BE CONSIDERED STATICALLY RELIABLE FOR STRUCTURAL APPLICATIONS. THE FINDINGS REPORTED SUPPORT THE FEASIBILITY OF THE GAS METAL-ARC SPOT-WELDING PROCESS FOR SOME STRUCTURAL APPLICATIONS. THE BASIC STRENGTH PROPERTIES ARE REVEALED BY DIRECT SHEAR TEST DATA, TENSION TEST DATA, ROCKWELL HARDNESS, AND PHOTOMICROGRAPHS ON THE WELD METAL. /AUTHOR/]]></description>
      <pubDate>Fri, 15 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110168</guid>
    </item>
    <item>
      <title>THE ADHESION OF BITUMINOUS BINDERS TO ROAD AGGREGATES</title>
      <link>https://trid.trb.org/View/95099</link>
      <description><![CDATA[AN EXTENDED SERIES OF TESTS WAS CONDUCTED ON ADHESION OF BITUMINOUS BINDERS, USING THE RIEDEL AND WEBER METHOD ON FINE MATERIAL, 1/2-IN. CHIPPINGS, AND TRACING THE CONNECTION BETWEEN THE RESULTS OBTAINED AND THE MINERAL COMPOSITION, GRAIN-SIZE AND SURFACE TEXTURE OF THE AGGREGATES. NINE DIFFERENT KINDS OF BINDERS WERE USED, AND THE ADHESION OF THESE TO EACH OF 16 DIFFERENT AGGREGATES WAS STUDIED. SOME OF THESE BINDERS AND AGGREGATES WERE FURTHER TESTED BY MEANS OF THE GERMAN U.37 TEST AND ALSO BY MEANS OF THE MODIFIED OBERBACH TEST. THESE TESTS AND THE PROCEDURES ARE DESCRIBED. IT IS CONCLUDED THAT THE ADDITION OF MINERAL FILLER TO THE BINDER INCREASES ITS VISCOSITY AND SO HELPS TO REDUCE THE TENDENCY OF THE LATTER TO BE DISPLACED BY WATER. DIFFERENCES IN ADHESION ARE DUE MORE TO VARYING DEGREES OF ROUGHNESS OF THE AGGREGATE RATHER THAN TO DIFFERENCES IN ITS COMPOSITION. THE MINERAL COMPOSITION OF THE AGGREGATE IS OF IMPORTANCE ONLY INSOFAR AS IT AFFECTS SURFACE TEXTURE. THE GRAIN SIZE OF THE CONSTITUENT MINERAL IS A FACTOR EXCEPT FOR SLAGS. ADHERENT COATINGS SUCH AS LIMONITE IMPROVE THE ADHESION. NO SIMPLE MATHEMATICAL METHOD OF MEASURING THE DEGREE OF RUGOSITY OF THE EXTERIOR OF AN AGGREGATE HAS BEEN DEDUCED, BUT A MICROGRAPHIC PROJECTION GIVING A MAGNIFICATION 50 TIMES (LINEAR) OF THE EDGE OF THE AGGREGATE ENABLES THE TEXTURE OF A STONE TO BE COMPARED WITH ONE OF A SERIES SHOWN IN THE TABLE. THE REIDEL AND WEBER TEST IS EXTREMELY USEFUL FOR PRELIMINARY PURPOSES, BUT THE FAILURE OF A STONE UNDER THIS TEST DOES NOT NECESSARILY MEAN THAT IT IS INCAPABLE OF BEING BOUND. IF BAD RESULTS ARE OBTAINED IT CAN BE TESTED BY THE MODIFIED OBERBACH TEST, THE GERMAN U.37 TEST NOT BEING RECOMMENDED.]]></description>
      <pubDate>Sat, 21 May 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95099</guid>
    </item>
    <item>
      <title>INVESTIGATION OF THE PENETRATION OF ASPHALT INTO POROUS AGGREGATES AS RELATED TO AND AFFECTING THE SPECIFIC GRAVITY OF THE AGGREGATES</title>
      <link>https://trid.trb.org/View/95121</link>
      <description><![CDATA[ASPHALT ABSORPTION TEST RESULTS ON HIGHLY POROUS AGGREGATES ARE DESCRIBED FOR VARIOUS MIXING TEMPERATURES AND CONDITIONS OF MIXING. VISUAL STUDIES ARE MADE BY THE USE OF MICROPHOTOGRAPHS.]]></description>
      <pubDate>Thu, 05 May 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95121</guid>
    </item>
    <item>
      <title>THE MICROSCOPY OF CONCRETE</title>
      <link>https://trid.trb.org/View/95575</link>
      <description><![CDATA[CONCRETE INVESTIGATIONS ARE GENERALLY PERFORMED WITH THE POLARIZING MICROSCOPE WITH TRANSMITTED LIGHT BOTH ON THIN SECTIONS AND ON SCATTER SPECIMENS. THE POSSIBILITIES OF CONCRETE MICROSCOPY ARE SURVEYED WITH REFERENCE TO PHOTOMICROGRAPHS. FIRST, IT IS SHOWN HOW, WITH THE AID OF THE MICROSCOPE, UNUSED CEMENTS OF DIFFERENT KINDS CAN BE DETERMINED AND THE MINERALOGICAL CONSTITUTION OF THE AGGREGATES CAN BE JUDGED. WITH A LITTLE EXPERIENCE THESE INVESTIGATIONS CAN BE PERFORMED ALSO ON HARDENED CONCRETE, AND THEY ADDITIONALLY ENABLE THE CALCIUM HYDROXIDE TO BE DETECTED WHICH IS FORMED IN THE HYDRATION OF THE CEMENT. OF ESPECIAL IMPORTANCE IS THE MICROSCOPIC EXAMINATION OF NEWLY FORMED COMPOUNDS IN AND ON CONCRETE. IN THIS WAY VALUABLE INDICATIONS ARE OFTEN OBTAINED AS TO THE REACTIONS CAUSED BY CARBON DIOXIDE AND BY SULFATES. IN ADDITION, THE EXAMINATION OF CRUSTS AND STALACTITE FORMATIONS AND OF EFFLORESCENCE PHENOMENA PROVIDES INFORMATION OF THE MANNER IN WHICH THEY DEVELOPED. /AUTHOR/]]></description>
      <pubDate>Sun, 20 Feb 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95575</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>ANALYSIS OF THE PHYSICAL CHARACTERISTICS OF DIESEL PARTICULATE MATTER USING TRANSMISSION ELECTRON MICROSCOPE TECHNIQUES</title>
      <link>https://trid.trb.org/View/204507</link>
      <description><![CDATA[An Andersen Impactor was used to collect particulate samples in both the undiluted and diluted exhaust from a Caterpillar 3150 diesel engine operated on the EPA (Environmental Protection Agency) 13-mode cycle. Twenty-four samples were examined under a transmission electron microscope and approximately 300 photomicrographs were taken.  The microscope analysis and photomicrographs revealed details concerning the physical characteristics of the particulate and permitted direct visual comparison of the samples.  The photomicrographs were used to obtain diameter measurements of nearly 11,000 basic individual spherical particles that comprise the much larger aggregates/agglomerates.  Size measurements were grouped, by operating mode, to provide size distributions for the basic spherical particles.  At the lower temperatures of the diluted exhaust, evidence of hydrocarbon condensation is illustrated in many of the photomicrographs.  In some instances, the condensed coating is so heavy as to completely obscure all detail of the aggregate/agglomerate on which it is adsorbed.  The differences between undiluted and diluted exhaust samples are quickly discerned.  Several of the samples showed what appeared to be "droplets" or "pools of liquid".  The results provide better qualitative data on the physical character of the basic diesel particles that make up the aggregates/agglomerates in diesel exhaust.  The photomicrographs of particles in the undiluted and diluted exhaust also provide experimental evidence that both separate liquid hydrocarbons and those adsorbed on the solid particles exist in diluted diesel exhaust and not in the undiluted exhaust.  No significant size differences in the basic solid particles were found between the undiluted and diluted exhaust.]]></description>
      <pubDate>Thu, 30 Aug 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/204507</guid>
    </item>
    <item>
      <title>ACTION BY A DRIVER-DOCTOR AT THE SCENE OF AN ACCIDENT</title>
      <link>https://trid.trb.org/View/80209</link>
      <description><![CDATA[In this work a description is given of the 5 immediate measures which the first aider should undertake at the scene of an accident: (1) make the accident site safe (2) inspect the injured; (3) inform the police and the emergency organisation; (4) first aid for the injured; (5) hand-over to the emergency organisation.  The special activities which a doctor should carry out in this situation are described. They concern mainly first-aid to the patients having regard to breathing, circulation and danger to the injured from shock and the choice of the type of transport to convey the injured to the clinic. The necessary instruments and emergency drugs which should always be available in every doctor's car are listed. /TRRL/]]></description>
      <pubDate>Sat, 13 Jan 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/80209</guid>
    </item>
    <item>
      <title>STUDY ON AUTOMOTIVE PARTICULATE EMISSIONS (PART 1). ANALYSIS OF DEPOSITS AND PARTICULATE EMISSIONS OF LEAD COMPOUNDS</title>
      <link>https://trid.trb.org/View/58910</link>
      <description><![CDATA[In May 1970 it was reported that excessive lead was detected in the blood of people living in Usigome Yanagicho, Tokyo, the first case of its kind in Japan. This report describes an analysis of lead and other particles in car engines, exhaust systems and exhaust gases.  Apparatus developed to measure size distribution, volume, concentration and shape of emitted particles, is also described.  Some of the results obtained are as follows: 20-40% of the lead contained in fuel is emitted under ordinary driving conditions, the emission ratio increasing with speed and/or load - the lower and lighter the engine speed and load, the greater is the emission of fine lead particles (smaller than 0.1 microns), which account for more than 80% by weight of overall lead emissions - air chamber gravitation tests show that airborne particles take about 24 hours to move 1 metre - x ray microprobe analysis show the iron, carbon and lead distributions in particles.  Liquid particles which have high boiling points exist in exhaust gases, and some examples are shown in photomicrographs from exhaust emissions and the road side atmosphere. /TRRL/]]></description>
      <pubDate>Thu, 18 May 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/58910</guid>
    </item>
    <item>
      <title>PAVING ASPHALTS: CHEMICAL COMPOSITION, OXIDATIVE WEATHERING AND ASPHALT-AGGREGATE INTERACTIONS. PART II</title>
      <link>https://trid.trb.org/View/22414</link>
      <description><![CDATA[This report describes an interrelated study of the oxidation products formed in asphalt during the processing of road mixes and aging in the road and the interactions of asphalt and its oxidation products with aggregate to form the asphalt-aggregate adhesive bond.  A method for the qualitative and quantitative determination of ketones, car- boxylic acids, dicarboxylic anhydrides, and 2-quionolone types in asphalts was developed and applied to ten penetration-grade asphalts recovered from 11- to 13-year-old pavements. Carbonyl types strongly adsorbed on the aggregate surface were quantitatively determined. Independent studies identified ketones & dicarboxylic anhydrides as significant carbonyl-type oxidation products in aspahlts.  Evidence for the structural types of ketones and anhydrides in asphalts is given.  Esters were not found in the asphalt oxidation products.  Mineral surfaces and components naturally present in asphalt were both found to catalyze the oxidation of aspahlt.  Asphalt-aggregate interactions were studied by microcalorimetry which gave evidence of multilayer adsorption of asphalt molecules in the asphalt-aggretate interphase region.  Further evidence for the orientation of molecules in the interphase region was provided through photomicroscopic studies.  The significance of the work to asphalt paving technology is discussed.  /FHWA/]]></description>
      <pubDate>Thu, 08 Apr 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/22414</guid>
    </item>
    <item>
      <title>THERMAL DEACTIVATION OF A PLATINUM MONOLITHIC CARBON MONOXIDE/HYDROCARBON OXIDATION CATALYST</title>
      <link>https://trid.trb.org/View/25401</link>
      <description><![CDATA[In this thermal deactivation study of a platinum monolithic oxidation catalyst between 1400 and 2400 deg F, the effects of the thermal treatments on the oxidation of carbon monoxide, propylene, propane and engine exhaust gas were measured.  The catalysts were characterized by measurement of surface area, carbon monoxide and hydrogen chemsorptions, X-ray line broadening, and X-ray diffraction; surface morphology was examined by scanning electron micrography. Results relating to the growth of platimum crystallites, sintering of alumina, and solid-state phase changes are reported.]]></description>
      <pubDate>Thu, 06 Mar 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/25401</guid>
    </item>
    <item>
      <title>SCANNING ELECTRON MICROSCOPE STUDY OF PORE SYSTEMS IN ROCKS</title>
      <link>https://trid.trb.org/View/121630</link>
      <description><![CDATA[PORE SYSTEMS IN ROCKS ARE GENERALLY AFFECTED BY GRAIN SIZE, SHAPE, SORTING, PACKING, NATURE OF CEMENTING MATERIALS, BY DETRITAL AND AUTHIGENIC PORE FILLERS, AND BY THE PREVIOUSLY IMPOSED PRESSURE AND TEMPERATURE HISTORY. THESE VARIABLES, THROUGH THEIR INFLUENCE ON THE PORE STRUCTURE, CONTROL IMPORTANT PETROPHYSICAL PROPERTIES SUCH AS POROSITY, PERMEABILITY, IRREDUCIBLE FLUID SATURATION, FORMATION RESISTIVITY FACTOR, SPECIFIC SURFACE AREA, AND VELOCITIES AND ATTENUATIONS OF ELASTIC WAVES. BY PRESENTATION OF PHOTOMICROGRAPHS, THE SCANNING ELECTRON MICROSCOPE (SEM), WITH ITS LARGE DEPTH OF FOCUS AND MAGNIFICATION, IS SHOWN TO REVEAL DETAILS OF PORE SPACES OF ROCKS IN THREE DIMENSIONS. THE PORE SYSTEMS OF 42 ROCK SAMPLES, OBTAINED FROM SURFACE OUTCROPS AND DURING THE DRILLING OF OIL WELLS, WERE EXAMINED. IN MOST CASES, THE DETAILS OF THE PORE STRUCTURE WOULD NOT HAVE BEEN POSSIBLE TO STUDY UNDER A LIGHT TRANSMISSION MICROSCOPE. SEM MICROGRAPH SEQUENCES OF TYPICAL PORE STRUCTURES FROM THE MORE EXTENSIVE STUDY WERE SELECTED AND ARE PRESENTED FOR ONE SANDSTONE, ONE LIMESTONE, ONE DOLOMITE, FIVE SHALE, AND TWO GRANITE SAMPLES. IT IS SUGGESTED THAT MAPS OF PORE STRUCTURES IN ROCKS COULD BE QUANTITATIVELY OBTAINED FROM OVERLAPPING STEREO PAIRS OF MICROGRAPHS THROUGH USE OF PHOTOGRAMMETRIC TECHNIQUES. /AUTHOR/]]></description>
      <pubDate>Sun, 03 Oct 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/121630</guid>
    </item>
    <item>
      <title>A STUDY OF TRANSLUCENT ASPHALTIC FILMS</title>
      <link>https://trid.trb.org/View/101242</link>
      <description><![CDATA[THIN FILMS OF ASPHALTIC MATERIALS HAVE BEEN WEATHERED NATURALLY AND ARTIFICIALLY AND THEN STUDIED MICROSCOPICALLY BY TRANSMITTED LIGHT. ONE REACTION, DESIGNATED AS COAGULATION, OCCURS IN SOME POSITIVE OLIENSIS SPOT TEST MATERIALS UNDER NEARLY ALL TEST CONDITIONS. OBSERVATIONS AND SOLUBILITY CHARACTERISTICS INDICATE THE COAGULATED FILM, AT ITS FORMATION TIME, TO BE COMPOSED OF A DISPERSED SOLID PHASE AND A CONTINUOUS LIQUID PHASE. THIS REACTION IS BELIEVED TO BE VERY IMPORTANT IN THAT IT GIVES A METHOD OF DETERMINING THE COMPATIBILITY OF AN ASPHALT MIXTURE. OTHER CHARACTERISTICS SUCH AS HARDENING, CHECKING, WRINKLING, FLOCCULATION, PRECIPITATION, AND THE FORMATION OF WAXY BODIES HAVE BEEN OBSERVED MICROSCOPICALLY. PHOTOMICROGRAPHS OF THESE ASPHALTIC FILM CHARACTERISTICS ARE PRESENTED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101242</guid>
    </item>
  </channel>
</rss>