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    <title>Transport Research International Documentation (TRID)</title>
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    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
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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>LIQUID LIMIT OF SOIL MIXTURES</title>
      <link>https://trid.trb.org/View/270696</link>
      <description><![CDATA[The liquid limit test is one of the most widely used tests in the soil enginering practice.  Several prroperties, including mechanical properties (for example, compressive index), have correlations with the liquid limit.  In this paper detailed investigations of the liquid limit of soil mixtures have been carried out using bentonite, kaolinite, sand (coarse grained, fine grained, rounded and angular shaped), and silts.  Based on the results obtained, it has been shown that the liquid limits of soil mixtures are not governed by the linear law of  mxtures.  While the shape of the sand was not found to influence the liquid limit, the size of the sand particles had a definite influence.  Liquid limit obtained by the cone method is lesser than the limit obtained by using the Casagrande apparatus.  A good relationship exists between the results of these two methods.  A procedure for obtaining the liquid limit of low plastic soil has been suggested.  (Author) been suggested.  (Author)]]></description>
      <pubDate>Fri, 27 Aug 2004 21:59:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/270696</guid>
    </item>
    <item>
      <title>FIELD EVALUATION OF LIME-FLY ASH-SOIL COMPOSITIONS FOR ROADS</title>
      <link>https://trid.trb.org/View/122541</link>
      <description><![CDATA[A NUMBER OF FIELD PROJECTS HAVE BEEN STUDIED IN WHICH LIME-FLYASH-SOIL COMPOSITIONS HAVE BEEN USED IN THE CONSTRUCTION OF ROADS, PARKING AREAS, AN AIRFIELD RUNWAY, AND AN EARTHWORK WALL. PERFORMANCE HAS BEEN EVALUATED BY PHYSICAL INSPECTION, BY THE USE OF SONIC PROCEDURES AND BY TESTING OF UNDISTURBED SPECIMENS WHICH HAVE BEEN REMOVED FROM THE BASE. THESE RESULTS WERE COMPARED WITH LABORATORY STUDIES INVOLVING POZZOLANIC ACTIVITY TESTS CONDUCTED AT ELEVATED TEMPERATURE AND BEARING TESTS MADE ON SPECIMENS WHICH WERE SUBJECTED TO ALTERNATE WETTING AND DRYING CYCLES. THE RESULTS OF THE SURVEY HAVE BEEN QUITE FAVORABLE. EXCEPT FOR MINOR INDICATIONS OF DISTRESS ON A FEW OF THE PROJECTS INVOLVING UNSATISFACTORY SUBGRADE OR DRAINAGE CONDITIONS, THE BASES COVERED WITH BITUMINOUS WEARING COURSE ARE IN EXCELLENT CONDITION. A RECOMMENDED LABORATORY EVALUATION PROCEDURE FOR THE LIME-FLYASH COMPOSITIONS IS PRESENTED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:43:53 GMT</pubDate>
      <guid>https://trid.trb.org/View/122541</guid>
    </item>
    <item>
      <title>APPLICATION OF COLOR AERIAL PHOTOGRAPHY TO GEOLOGIC AND ENGINEERING SOIL MAPPING</title>
      <link>https://trid.trb.org/View/121152</link>
      <description><![CDATA[COLOR AERIAL PHOTOGRAPHS ARE HELPFUL TO THE GEOLOGIST AND SOILS ENGINEERS IN MAPPING A PART OF THE ATLANTIC COASTAL PLAIN IN NEW JERSEY. COLOR DIFFERENCES CAN BE SEEN BETWEEN EXPOSURES CONSISTING ALMOST ENTIRELY OF LIGHT-GRAY TO YELLOW-BROWN QUARTZ SAND AND EXPOSURE CONSISTING LARGELY OF QUARTZ SAND, BUT CONTAINING 5 TO 15 PERCENT OF GREEN GLAUCONITE. COLOR DIFFERENCES ALSO ARE APPARENT AMONG FORMATIONS CONTAINING DIFFERENT AMOUNTS OR KINDS OF CLAY, AND BETWEEN WEATHERED PARTS OF THE SAME FORMATION OR SOIL. THE ABILITY TO DISTINGUISH ON COLOR AERIAL PHOTOGRAPHS AMONG SOILS OF DIFFERENT COMPOSITION, TEXTURE, AND DEGREE OF WEATHERING IS A SIGNIFICANT ADVANTAGE TO THE SOILS ENGINEER. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:38:14 GMT</pubDate>
      <guid>https://trid.trb.org/View/121152</guid>
    </item>
    <item>
      <title>GEOTECHNICAL ASPECTS OF SUBGRADE DESIGN</title>
      <link>https://trid.trb.org/View/121017</link>
      <description><![CDATA[PRESENT DESIGN PROCEDURES ARE REVIEWED AND AN IMPROVED APPROACH IS SUGGESTED. THIS APPROACH CONSISTS OF THE USE OF GEOTECHNICAL CONCEPTS AND THE TERRAIN ANALYSIS TECHNIQUE AS THE BASIS FOR A REALISTIC SUBGRADE DESIGN. AN EXAMPLE OF A TERRAIN ANALYSIS AND ITS DESIGN APPLICATION IS INCLUDED. THE TOPSOIL PROBLEM PECULIAR TO THE PRAIRIE PROVINCES IS DISCUSSED. SOME PROPERTIES OF TOPSOIL ARE DISCUSSED. BECAUSE OF THESE PROPERTIES, TOPSOIL SHOULD NOT BE USED IN SUBGRADE DESIGN AND OTHER MORE PRACTICAL USES ARE SUGGESTED. PARTICULAR SOIL DEPOSITS - GLACIAL DEPOSITS - ARE DISCUSSED AS WELL AS THE COMPOSITION OF EACH. THE SIGNIFICANCE OF EACH TYPE OF DEPOSIT IS MENTIONED COINCIDENT WITH THE DIFFICULTIES INVOLVED IN TESTING. /CGRA/RRL/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:37:43 GMT</pubDate>
      <guid>https://trid.trb.org/View/121017</guid>
    </item>
    <item>
      <title>ACOUSTIC METHODS OF RESEARCH INTO THE PROPERTIES AND HARDENING OF CEMENT-STABILIZED SOILS</title>
      <link>https://trid.trb.org/View/120496</link>
      <description><![CDATA[A RELATION WAS ESTABLISHED BETWEEN CHANGES IN THE DYNAMIC MODULUS OF ELASTICITY AND VARIATIONS IN THE STRENGTH OF STABILIZED SOILS ACCORDING TO MOISTURE CONTENT. DATA ON THE DYNAMIC MODULUS OF ELASTICITY ARE TABULATED ACCORING TO TYPE OF MATERIAL, SURFACE-ACTIVE AGENT AND PROPORTION OF CEMENT USED, CURVES PLOT THE RATE OF HARDENING OF THE TEST BEAMS. IT WAS FOUND THAT A COMPARISON OF PARAMETERS OBTAINED BY THE ULTRASONIC PULSE METHOD FOR STABILIZED SOIL OF DIFFERENT COMPOSITION AND MOISTURE CONTENT DOES NOT GENERALLY INDICATE THEIR RELATIVE STRENGTHS.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:35:39 GMT</pubDate>
      <guid>https://trid.trb.org/View/120496</guid>
    </item>
    <item>
      <title>SURFACE AND SUBSURFACE EXPLORATION BY INFRARED SURVEYS</title>
      <link>https://trid.trb.org/View/120197</link>
      <description><![CDATA[SOME OF THE BASIC PRINCIPLES ARE SUMMARIZED RELATING TO INFRARED RADIOATION (IR) VARIOUS APPLICATIONS OF INFRARED PHOTOGRAPHY AND IMAGERY TO SURFACE AND SUBSURFACE EXPLORATION AND TERRAIN ANALYSIS FOR HIGHWAY CONSTRUCTION AND OTHER ENGINEERING PROJECTS. MAJOR CONCLUSIONS FROM THIS STUDY ARE THE FOLLOWING: (1) IR PHOTOGRAPHY AND IMAGERY HIGHLIGHT VARIATIONS IN SOIL TEXTURE, COMPOSITION, AND MOISTURE THAT MAY NOT USUALLY BE RECORDED BY CONVENTIONAL PHOTOGRAPHY, (2) THE CHLOROPHYLL EFFECT ALLOWS IR PHOTOGRAPHY TO ASSIST IN THE APPRAISAL OF CULTIVATED LAND FOR RIGHT-OF-WAY ACQUISITIONS, AND (3) HIDDEN SUBSURFACE CONDITIONS AND GEOLOGICAL FEATURES THAT ARE OF GREATEST IMPORTANCE DURING HIGHWAY SITE SELECTION AND DESIGN CAN BE EXPOSED WITH IR INSTRUMENTATION-FEATURES SUCH AS MUCK POCKETS, UNDERGROUND CAVITIES, VOLCANIC AND HYDROTHERMAL ACTIVITIES, SUBSURFACE DRAINAGE SYSTEMS, AND BURIED UTILITIES AND CONDUITS. WITH FUTHER RESEARCH IN THE TECHNIQUES USED FOR REMOTE SENSING IN THE INFRARED, SURFACE AND SUBSURFACE EXPLORATION AND DRAINAGE STUDIES FOR CONSTRUCTION OF HIGHWAYS, AIRPORTS, AND OTHER PROJECTS MAY BE GREATLY FACILITATED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:34:28 GMT</pubDate>
      <guid>https://trid.trb.org/View/120197</guid>
    </item>
    <item>
      <title>THE STRENGTH OF COMPACTED COHESIVE SOILS</title>
      <link>https://trid.trb.org/View/119580</link>
      <description><![CDATA[PHYSICO-CHEMICAL CONCEPTS AND ENVIRONMENTAL FACTORS ARE INTRODUCED TO EXPLAIN THE IMPORTANCE OF THE NET INTERPARTICLE FORCES IN FINE GRAINED COHESIVE MATERIALS. IT IS POINTED OUT THAT THE SOIL COMPOSITION HAS A PRIMARY INFLUENCE UPON THE STRENGTH OF COMPACTED CLAYS. THE SOIL COMPOSITION INCLUDES NOT ONLY THE MOLDING WATER CONTENT AND DRY DENSITY, BUT ALSO THE SOIL STRUCTURE. IT IS SHOWN FROM THE TEST RESULTS UNDER CAREFULLY-CONTROLLED TEST CONDITIONS THAT THE CHANGES IN THE PORE WATER PRESSURES AND THE SHEARING RESISTANCE IN RESPONSE TO INCREASING AXIAL STRAINS IN THE TRIAXIAL COMPRESSION TESTS ARE SIGNIFICANTLY DIFFERENT ON THE DRY AND WET SIDE OF OPTIMUM FOR ANY GIVEN METHOD OF COMPACTION. THE MAGNITUDE OF DIFFERENCES IS SHOWN TO DEPEND UPON THE DIFFERENT SOIL STRUCTURES CAUSED BY THE DIFFERENT COMPACTION METHODS. THE DIFFERENCES IN THESE BEHAVIOR CHARACTERISTICS ARE EXPLAINED IN TERMS OF THE DIFFERENCES IN SOIL STRUCTURE. BASED ON THE TRENDS OF CHANGES IN SECANT MODULI OF DIFFERENT STRAIN LEVELS, WITH INCREASING MOLDING WATER CONTENTS, ALONG THE SAME COMPACTION CURVE OBTAINED FROM DIFFERENT COMPACTION METHODS, THE SIGNIFICANCE OF THE FAILURE CRITERION IN PREDICTING THE MOLDING WATER CONTENT-DRY DENSITY-STRENGTH RELATIONSHIPS IS EMPHASIZED. ALSO, DATA IS COVERED ON THE EFFECTS OF THIXOTROPY, DURATION AND RATE OF LOADING, THE MAGNITUDE, FREQUENCY AND DURATION OF THE REPETITIVE LOADING ON THE STRENGTH CHARACTERISTICS. THE INFLUENCE OF DIFFERENT METHODS OF COMPACTION ON THE SWELLING AND SWELL PRESSURES ARE PRESENTED. THE APPENDIX INCLUDES INFORMATION ON THE TECHNIQUES OF PREPARATION OF SAMPLES FOR CONTROLLED TESTS, TRIAXIAL TEST PROCEDURES, DISCUSSION OF TEST ERRORS, AND THE EFFECT OF TEMPERATURE VARIATION ON PORE PRESSURES.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:24:35 GMT</pubDate>
      <guid>https://trid.trb.org/View/119580</guid>
    </item>
    <item>
      <title>GENESIS AND COMPOSITION OF PEAT DEPOSITS</title>
      <link>https://trid.trb.org/View/119577</link>
      <description><![CDATA[A DETAILED BOTANICAL ANALYSIS IS PRESENTED OF THE HORIZONS OF FIVE PEAT DEPOSITS, RESPECTIVELY REPRESENTATIVE OF EACH OF THE TYPES OF PEAT DEPOSITS OF THE EXTENSIVELY CULTIVATED AREAS OF NEW YORK. IT WAS FOUND THAT: (1) THE SUCCESSION OF PLANT ASSOCIATIONS WHICH BRINGS ABOUT THE FORMATION OF A PEAT DEPOSIT IS A REFLECTION OF THE NATURE OF THE UNDERLYING MATERIAL, (2) THE QUALITY OF THE PEAT LAND IS DIRECTLY CONNECTED TO THE NATURE OF THE MATERIAL ON WHICH IT RESTS, (3) THREE PRINCIPAL TYPES OF PEAT (WOODY, SEDIMENTARY AND FIBROUS) ARE USUALLY FOUND IN THE SAME PEAT DEPOSIT, IN DIFFERENT LAYERS, (4) THE TYPES OF PEAT FOUND IN ONE DEPOSIT WERE ARRANGED IN THE FOLLOWING ORDER FROM TOP TO BOTTOM: WOODY PEAT, FIBROUS PEAT AND SEDIMENTARY PEAT, AND (5) CLIMATE, TOPOGRAPHY AND WATER RELATIONSHIPS ARE IMPORTANT FACTORS IN THE NATURAL DEVELOPMENT OF A PARTICULAR TYPE OF PEAT.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:24:30 GMT</pubDate>
      <guid>https://trid.trb.org/View/119577</guid>
    </item>
    <item>
      <title>LABORATORY TESTS ON PHYSICAL PROPERTIES OF WATER BEARING MATERIALS</title>
      <link>https://trid.trb.org/View/119095</link>
      <description><![CDATA[THE APPARATUS AND METHODS USED IN MAKING TESTS OF MECHANICAL COMPOSITION, POROSITY, MOISTURE EQUIVALENT, AND PERMEABILITY ARE DESCRIBED. THE SOIL SAMPLES TESTED FROM NEW JERSEY ARE ALL UNCONSOLIDATED SAND AND GRAVEL AND RANGE IN AGE FROM CRETACEOUS TO RECENT. THOSE FROM MONTANA COMPRISE UNCONSOLIDATED SAND, SILT, AND GRAVEL AND CONSOLIDATED ROCKS, CHIEFLY SANDSTONE AND SHALE, RANGING IN AGE FROM LOWER CRETACEOUS TO RECENT. THE SAMPLES FROM IDAHO ARE CHIEFLY SURFACE SILT AND THE LOESS THAT MANTLE CERTAIN RESERVOIR SITES. THE LABORATORY TESTS WERE CONDUCTED TO OBTAIN QUANTITATIVE DATA ON PERMEABILITY AND ON SPECIFIC YIELD. THE RESULTS OF MECHANICAL ANALYSIS AND TESTS OF POROSITY TOGETHER GIVE A NEARLY COMPLETE DEFINITION OF THE TEXTURE OF UNCONSOLIDATED MATERIAL, WHICH CHIEFLY CONTROLS BOTH THEIR PERMEABILITY AND SPECIFIC YIELD. THE POROSITY TEST SUPPLIES AN ESSENTIAL FACTOR IN CERTAIN INDIRECT METHODS OF OBTAINING BOTH PERMEABILITY AND SPECIFIC YIELD. THE MOISTURE EQUIVALENT GIVES AN APPROXIMATION OF THE SPECIFIC RETENTION AND OF THE SPECIFIC YIELD. THE PERMEABILITY TEST GIVES A DIRECT MEASUREMENT OF PERMEABILITY TO WATER. THESE TESTS GIVE FAIRLY RELIABLE COMPARATIVE DATA ON THE WATER-BEARING CHARACTERISTICS OF THE MATERIALS INVESTIGATED. AN OUTLINE IS PRESENTED OF WORK PERFORMED BY HAZEN, KING, AND SLICHTER ON THE EFFECTIVE SIZE IN RELATION TO PERMEABILITY.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:12:11 GMT</pubDate>
      <guid>https://trid.trb.org/View/119095</guid>
    </item>
    <item>
      <title>ATLAS OF AMERICAN AGRICULTURE: PART III SOILS OF THE UNITED STATES</title>
      <link>https://trid.trb.org/View/119094</link>
      <description><![CDATA[CONTENTS: SOILS AND PARENT MATERIAL SOIL CLASSIFICATION GENERAL CONSIDERATIONS SIZE GROUPS OF SOIL MATERIALS GROUPING OF TEXTURE UNITS INTO SERIES UNITS THE CATEGORIES IN A SCHEME FOR SOIL CLASSIFICATION THE GEOGRAPHIC RELATIONSHIPS OF THE CATEGORIES DISTRIBUTION OF PARENT MATERIALS ACCORDING TO CHARACTER AND ACCUMULATION DISTRIBUTION OF SOILS WITHOUT NORMAL PROFILES THE COLOR-PROFILE CHART APPROXIMATE CHEMICAL AND MECHANICAL COMPOSITION CHARTS HISTORY OF SOIL UNIT DEFINITION AND SOIL CLASSIFICATION IN THE UNITED STATES COMBINING SERIES GROUPS INTO BROADER GROUPS THE PODZOLS THE GRAY-BROWN PODZOLIC SOILS RED AND YELLOW SOILS THE PRAIRIE SOILS DEVELOPMENT OF THE PODZOLIC SOILS THE PEDOCALS METHOD OF SOIL ANALYSIS USED IN THE DIVISION OF SOIL CHEMISTRY AND PHYSICS, BUREAU OF CHEMISTRY AND SOILS PREPARATION OF THE SAMPLE MOISTURE DETERMINATION LOSS ON IGNITION FUSION WITH SODIUM CARBONATE DETERMINATION OF SILICA DETERMINATION OF IRON, ALUMINUM, AND TITANIUM PRECIPITATION OF THE AMMONIUM-SULPHIDE GROUP DETERMINATION OF CALCIUM DETERMINATION OF MAGNESIUM DETERMINATION OF POTASSIUM AND SODIUM DETERMINATION OF MANGANESE AND PHOSPHORUS DETERMINATION OF SULPHUR DETERMINATION OF NITROGEN DETERMINATION OF ORGANIC MATTER DETERMINATION OF COMBINED WATER DETERMINATION OF CARBON DIOXIDE FROM CARBONATES LIMITS OF ERROR IN THE ANALYSIS]]></description>
      <pubDate>Sun, 15 Aug 2004 02:12:09 GMT</pubDate>
      <guid>https://trid.trb.org/View/119094</guid>
    </item>
    <item>
      <title>TERRAIN ANALYSIS BY ELECTROMAGNETIC MEANS. REPORT NO 1' LABORATORY INVESTIGATIONS IN THE 0.76 TO 5.00 MICRON SPECTRAL REGION</title>
      <link>https://trid.trb.org/View/118134</link>
      <description><![CDATA[TESTS WERE CONDUCTED TO DETERMINE THE CAPABILITIES OF ACTIVE ELECTROMAGNETIC SENSORS OPERATING IN THE 0.76 TO 5.00 -MICRON SPECTRAL REGION TO MEASURE TERRAIN CHARACTERISTICS AFFECTING TRAFFICABILITY OF SOILS. CONTROLLED TESTS WERE CONDUCTED UNDER LABORATORY CONDITIONS IN AN ATTEMPT TO CORRELATE THE EFFECTS OF SOIL COMPOSITION, MOISTURE CONTENT, AND DENSITY WITH THE QUANTITY OF INFRARED ENERGY REFLECTED FROM A SOIL SAMPLE. RESULTS OF THESE TESTS INDICATE THAT THE MOISTURE CONTENT AND COMPOSITION OF HOMOGENEOUS SOIL SPECIMENS CAN BE CHARACTERIZED BY ACTIVE INFRARED SENSORS UNDER CONTROLLED LABORATORY CONDITIONS. HOWEVER, SINCE INFRARED ENERGY IS REFLECTED BY INFINITESIMALLY THIN SURFACES OF MATERIALS, INFORMATION CONCERNING DENSITY AND SUBSURFACE PARAMETERS CANNOT BE DISCERNED. TECHNIQUES FOR PREDICTION OF SOIL PARAMETERS THROUGH THE USE OF MULTI- WAVELENGTH ANALYSIS ARE DISCUSSED. THESE TECHNIQUES INVOLVE COMPARISON OF THE REFLECTIVITY PROPERTIES, AT SIX WAVELENGTHS, OF AN UNKNOWN SOIL SAMPLE WITH THOSE OBTAINED FROM SAMPLES OF KNOWN CHARACTERISTICS. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 01:47:59 GMT</pubDate>
      <guid>https://trid.trb.org/View/118134</guid>
    </item>
    <item>
      <title>NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM. SUMMARY OF PROGRESS THROUGH 1976</title>
      <link>https://trid.trb.org/View/67087</link>
      <description><![CDATA[The National Cooperative Highway Research Program's  (NCHRP) activities through 1976 are summarized, and the status of research efforts administered by the NCHRP is reported in this publication which also includes summaries of unpublished reports of some projects.  The formulation of NCHRP programs is outlined and the financing, administration, and contracting of the projects are briefly described.  The Program policy for applied research which is designed to respond quickly and efficiently to the needs of state highway and transportation departments, ensures maximum exposure of the research while in progress.  The projects listed here are grouped in 22 areas covering pavements, economics, traffic, general materials, laws, bridges, roadside development, safety etc.  Summaries are included of reports on criteria for need of seal coats for bituminous pavements (describes a Surface Condition Rating System); models for predicting weekend recreational traffic; specifications for glass beads in pavement marking; and standards for highway noise levels.]]></description>
      <pubDate>Thu, 30 Mar 2000 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/67087</guid>
    </item>
    <item>
      <title>SITE CHARACTERIZATION FOR EXPLOSIVES CONTAMINATION AT A MILITARY FIRING RANGE IMPACT AREA</title>
      <link>https://trid.trb.org/View/536941</link>
      <description><![CDATA[A study was conducted at the inland firing ranges at Fort Ord to determine the current levels of explosives residues and to recommend appropriate future site characterization techniques. A set of 280 soil samples was collected from depths ranging from 0-15 cm to 105-120 cm (0-6 in to 42-48 in) from anti-tank ranges 44 and 48.  Sampling locations were selected on the basis of the locations of current and former targets, and included an area away from specific targets and a background area, not affected by local detonations.  HMX was the explosives residue present at the highest concentration.  Much lower concentrations of RDX, TNT, and two isomers of aminodinitrotoluene were also detected. Explosives residues were largely confined to surface soils near tank targets.  A major problem for site characterization was found to be the large spatial heterogeneity present.  Composite samples very effectively provided representative samples for 5x5 m (200x200 in) size grids.  A colorimetric on-site method gave reliable results for HMX, relative to SW846 Method 8330.  No currently available on-site method for RDX was found to be adequate in the presence of much higher concentrations of HMX.]]></description>
      <pubDate>Wed, 07 Oct 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/536941</guid>
    </item>
    <item>
      <title>THE EFFECT OF SHAPES AND SOIL COMPOSITIONS OF GROUND ON EARTHQUAKE DAMAGE TO VARIOUS OBJECTS</title>
      <link>https://trid.trb.org/View/481523</link>
      <description><![CDATA[The structures of grounds on which various objects are liable to be damaged by earthquakes, have been studied in order to clarify the mechanism of damage to these objects, to develop earthquake-proof measures and to select appropriate sites for providing such measures.  It has been made clear that objects are liable to receive earthquake damage at the discontinuous sites of ground conditions and on grounds with soft clayey layers underlying coarse soil ones.  It has been presumed in this paper that most of the earthquake damage was caused by large differential displacements due to uneven thickness of soft soil layers, like soft clayey layers, by sliding displacements occurring in the thin soft ones.]]></description>
      <pubDate>Wed, 12 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/481523</guid>
    </item>
    <item>
      <title>MODELING DAMAGE TO RIGID PAVEMENTS CAUSED BY SUBGRADE PUMPING</title>
      <link>https://trid.trb.org/View/457568</link>
      <description><![CDATA[The efficient use of construction and maintenance resources requires the ability to effectively estimate and model subgrade pumping in rigid concrete pavements.  The authors present a review of the evolution of a rigid pavement pumping model in this paper.  An existing model is extended to account for the effects of climate and drainage conditions, as well as soil composition on pumping magnitudes.  Additional changes allow the effect of nonconventional vehicle configurations to be considered in the calculation of pumping values.  Finally, the process of computing pumping volumes and distributing void areas is altered to provide a more realistic effect.  This improved model allows proposed designs to be analyzed to determine optimum pavement characteristics.  The model is applied in a finite-element based method for analysis of pavements that also includes the effects of concrete cracking and fatigue.  Urgent need for experimental data on the size and growth of voids beneath a pavement is noted.]]></description>
      <pubDate>Tue, 20 Feb 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/457568</guid>
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