<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=PHNlYXJjaD48cGFyYW1zPjxwYXJhbSBuYW1lPSJkYXRlaW4iIHZhbHVlPSJhbGwiIC8+PHBhcmFtIG5hbWU9InN1YmplY3Rsb2dpYyIgdmFsdWU9Im9yIiAvPjxwYXJhbSBuYW1lPSJ0ZXJtc2xvZ2ljIiB2YWx1ZT0ib3IiIC8+PHBhcmFtIG5hbWU9ImxvY2F0aW9uIiB2YWx1ZT0iMCIgLz48L3BhcmFtcz48ZmlsdGVycz48ZmlsdGVyIGZpZWxkPSJpbmRleHRlcm1zIiB2YWx1ZT0iJnF1b3Q7QWdncmVnYXRlIHRlc3RpbmcmcXVvdDsiIG9yaWdpbmFsX3ZhbHVlPSImcXVvdDtBZ2dyZWdhdGUgdGVzdGluZyZxdW90OyIgLz48L2ZpbHRlcnM+PHJhbmdlcyAvPjxzb3J0cz48c29ydCBmaWVsZD0icHVibGlzaGVkIiBvcmRlcj0iZGVzYyIgLz48L3NvcnRzPjxwZXJzaXN0cz48cGVyc2lzdCBuYW1lPSJyYW5nZXR5cGUiIHZhbHVlPSJwdWJsaXNoZWRkYXRlIiAvPjwvcGVyc2lzdHM+PC9zZWFyY2g+" 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>Evaluating Specification Limits</title>
      <link>https://trid.trb.org/View/788225</link>
      <description><![CDATA[The results of a study to evaluate the existing South Carolina Department of Transportation (SCDOT) hot-mix asphalt quality assurance specification are presented. When the existing specification was developed, assumed values were used for the standard deviations needed to establish the specification limits. Acceptance test results from 39 different projects were analyzed to determine standard deviation values that were being obtained for asphalt content, air voids, voids in mineral aggregate, and density. For each project, standard deviation values were calculated for each lot, and these were then pooled to obtain a typical value for the project. The target miss variability, that is, the ability of contractors to center their processes on the target, was also determined for each acceptance characteristic. The project and target miss values were then used to establish a typical process standard deviation value for each of the four acceptance characteristics. All these standard deviation values proved to be smaller than those initially assumed and resulted in the SCDOT narrowing the specification limits for each of the acceptance characteristics. The project standard deviation values justified that these changes were made to reflect the actual variability that was present and not simply to tighten the specifications.]]></description>
      <pubDate>Tue, 22 Aug 2006 15:51:07 GMT</pubDate>
      <guid>https://trid.trb.org/View/788225</guid>
    </item>
    <item>
      <title>PROPERTIES OF CONCRETE MADE WITH CRUSHED CONCRETE AS COARSE AGGREGATE</title>
      <link>https://trid.trb.org/View/217908</link>
      <description><![CDATA[Effects of using recycled concrete of different qualities as coarse aggregate upon the strength and deformation of concrete are reported.  Tests on the aggregates showed that the recycled concrete aggregates have lower specific gravity and higher absorption capacity than the original crushed granite aggregate.  The resistance to mechanical action such as impact, crushing and abrasion for the recycled concrete aggregates is also lower.  The effects of using recycled concrete aggregates instead of natural aggregates in concrete are: reduction in compressive strength up to 25%; reduction in modulus of elasticity up to 30%; improvement in dumping capacity up to 30%; and higher amounts of drying shrinkage and creep.  Available methods of predicting the modulus of elasticity on the basis of compressive strength for conventional concrete overestimate the modulus of elasticity for recycled-aggregate concrete.  (Author/TRRL)]]></description>
      <pubDate>Wed, 25 Aug 2004 02:39:38 GMT</pubDate>
      <guid>https://trid.trb.org/View/217908</guid>
    </item>
    <item>
      <title>LARGE SCALE TESTING OF ROCKFILL MATERIALS</title>
      <link>https://trid.trb.org/View/119065</link>
      <description><![CDATA[No abstract provided.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:11:25 GMT</pubDate>
      <guid>https://trid.trb.org/View/119065</guid>
    </item>
    <item>
      <title>A METHOD OF PROPORTIONING CONCRETE FOR STRENGTH, WORKABILITY AND DURABILITY</title>
      <link>https://trid.trb.org/View/98535</link>
      <description><![CDATA[A SIMPLE METHOD OF PROPORTIONING WHICH WILL PRODUCE THE DESIRED QUALITY OF CONCRETE, IRRESPECTIVE OF TYPE OR GRADING OF THE AGGREGATE, IS DESCRIBED. IT IS CONSIDERED TO BE EASY TO USE, DEPENDABLE AND PRACTICAL, AN APPENDIX IS INCLUDED ON THE METHOD OF TEST FOR UNIT WEIGHT OF AGGREGATE. /RRL/]]></description>
      <pubDate>Thu, 29 Jul 2004 18:12:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/98535</guid>
    </item>
    <item>
      <title>DEGRADATION OF GRANULAR EMBANKMENTS AND FOUNDATION MATERIALS</title>
      <link>https://trid.trb.org/View/108335</link>
      <description><![CDATA[THERE ARE MANY AREAS IN THE STATE OF ALASKA WHICH CONTAIN MATERIAL OF QUESTIONABLE AND INFERIOR QUALITY FOR USE AS SUBBASE AND BASE COURSE MATERIAL DUE TO THEIR DEGRADING CHARACTERISTICS. THE GREAT MAJORITY OF THESE AGGREGATES WILL PASS PRESENT SPECIFICATION REQUIREMENTS FOR QUALITY AND, THEREFORE, A QUALITY TEST WHICH WILL SATISFACTORILY PREDICT DEGRADING CHARACTERISTICS IS BADLY NEEDED. THIS REPORT PRESENTS AN EVALUATION OF DEGRADATION TEST METHODS PRESENTLY BEING USED IN THE STATES OF OREGON, WASHINGTON, CALIFORNIA, IDAHO, AND ALASKA. THIS EVALUATION WAS BASED UPON' /1/ CORRELATION BETWEEN TEST RESULTS AND ACTUAL FIELD PERFORMANCE OF THE AGGREGATE, /2/ SIMPLICITY OF PROCEDURE AND REPRODUCIBILITY OF RESULTS, /3/ ABILITY TO BE ADAPTED TO FIELD USE, AND /4/ COST OF NECESSARY EQUIPMENT. A TOTAL OF 19 CONSTRUCTION PROJECTS WERE SELECTED, 4 OF WHICH WERE FIELD TEST SITES, EACH USING A DIFFERENT TYPE OF AGGREGATE. SAMPLES WERE SECURED AT THE SOURCE, AFTER PLACEMENT, AFTER 1-12 MONTHS SERVICE, AND THE FIELD PERFORMANCE COMPARED WITH THE DEGRADATION TEST RESULTS. IT IS RECOMMENDED THAT THE WASHINGTON DEGRADATION TEST BE ADOPTED FOR USE BY THE ALASKA DEPARTMENT OF HIGHWAYS. /AUTHOR/]]></description>
      <pubDate>Wed, 01 Oct 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/108335</guid>
    </item>
    <item>
      <title>LIMESTONE WITH EXCELLENT NON-SKID PROPERTIES</title>
      <link>https://trid.trb.org/View/107084</link>
      <description><![CDATA[THE PROPERTIES OF LIMESTONE WERE INVESTIGATED TO DETERMINE THE FACTORS WHICH CAUSE GOOD SKID RESISTANCE. LIMESTONE IS DEFINED AS SEDIMENTARY ROCK IN WHICH THE CARBONATE FRACTION EXCEEDS THE NONCARBONATE FRACTION AND IN WHICH THE PREDOMINATING METALLIC ELEMENT OF THE CARBONATE IS CALCIUM. FIVE LIMESTONE AGGREGATES, EACH FROM A DIFFERENT SOURCE, WERE SELECTED FOR INCLUSION IN BITUMINOUS CONCRETE MIXES. REALISTIC TEST SECTIONS WERE PLACED IN A CIRCULAR TEST TRACK AND THEIR SKID RESISTANCE MEASURED WITH A SPECIAL DEVICE DESIGNED FOR THIS PURPOSE. THE FIVE BITUMINOUS MIXTURES WERE FOUND TO DIFFER WIDELY IN SKID RESISTANCE. SAMPLES OF EACH OF THE FIVE AGGREGATES WERE LEACHED WITH HYDROCHLORIC ACID AND THE REMAINDERS FILTERED, WASHED, DRIED, AND WEIGHED. THE PERCENTAGES OF CARBONATES AND INSOLUBLE RESIDUE WERE CALCULATED. THIS RESIDUE WAS TESTED FOR GRAIN SIZE DISTRIBUTION BY THE ASTM METHOD AND FOR SPECIFIC GRAVITY. TWO OF THE LIMESTONES TESTED WERE QUITE SLIPPERY. ONE HAD ONLY A SMALL PORTION OF INSOLUBLES WHILE THE OTHER CONTAINED AN APPRECIABLE AMOUNT OF INSOLUBLES. THERE IS EVIDENCE THAT THE SAND SIZED GRAINS OF THE INSOLUBLES IS THE FACTOR THAT IS EFFECTIVE IN PROMOTING SKID RESISTANCE. DATA INDICATE THAT A COMBINATION OF DIFFERENTIAL HARDNESS, AMOUNT OF INSOLUBLE RESIDUE, AND GRAIN SIZE DISTRIBUTION OF THE INSOLUBLE RESIDUE ARE FACTORS THAT DETERMINE THE SKID RESISTANCE OF LIMESTONE AGGREGATES. IT IS KNOWN THAT BLENDS OF LIMESTONE AGGREGATE AND SILICEOUS SAND IN BITUMINOUS MIXTURES CAN PROVIDE SURFACES WITH ADEQUATE SKID RESISTANCE. IT IS ALSO KNOWN THAT SOME CHERTY LIMESTONES (NODULES) HAVE BEEN USED SATISFACTORLY IN SURFACE COURSE MIXTURES HAVING GOOD SKID RESISTANCE. IT IS BELIEVED THAT THE DATA PRESENTED INDICATE THAT A LIMESTONE POSSESSING THE PROPERTIES GIVEN ABOVE COULD BE USED AS THE ENTIRE AGGREGATE IN SURFACE COURSE MIXTURES WHICH WOULD POSSESS ADEQUATE SKID RESISTANCE.]]></description>
      <pubDate>Tue, 01 Jul 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107084</guid>
    </item>
    <item>
      <title>LABORATORY AND FIELD TESTS FOR AGGREGATE BASE MATERIAL FOR CALTRANS ACCELERATED PAVEMENT TESTING GOAL 5</title>
      <link>https://trid.trb.org/View/707460</link>
      <description><![CDATA[In this report, the author evaluates the effect of aggregate base density and permeability on in-situ moisture content. He also assesses the effectiveness of asphalt treated permeable base (ATPB) courses and makes recommendations for future testing. The report characterizes the aggregate base material that is used for California Department of Transportation (Caltrans) Accelerated Pavement Testing (APT) Goal 5. It summarizes laboratory and field test evaluations of aggregate base material that was used in the construction of the Heavy Vehicle Simulator (HVS) test sections at the University of California's Richmond Field Station. The report recommends the elimination of the ATPB layer and increasing the Caltrans specification for compaction. The recommendations are intended to reduce permeability, increase strength and stiffness, and increase asphalt concrete fatigue life thus leading to pavements with lower maintenance costs and longer life.]]></description>
      <pubDate>Fri, 02 May 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/707460</guid>
    </item>
    <item>
      <title>PHYSICAL AND CHEMICAL TESTS OF MINERAL AGGREGATES AND THEIR SIGNIFICANCE</title>
      <link>https://trid.trb.org/View/108390</link>
      <description><![CDATA[A REVIEW IS MADE OF LITERATURE PERTAINING TO PHYSICAL AND CHEMICAL TESTS OF AGGREGATES AND A SELECTED BIBLIOGRAPHY IS PRESENTED. THE DEVELOPMENT OF AGGREGATE TEST TECHNIQUES IS TRACED, AND THE APPLICABILITY OF THESE TECHNIQUES TO PRESENT -DAY AGGREGATE USAGE IS DISCUSSED. PRESENT, STANDARD TESTS USED FOR SPECIFICATION CONTROL OF QUALITY ARE DESCRIBED AND EVALUATED. RESEARCH TECHNIQUES WHICH HAVE BEEN USED TO DETERMINE AGGREGATE PROPERTIES ARE DESCRIBED.]]></description>
      <pubDate>Sun, 13 Apr 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/108390</guid>
    </item>
    <item>
      <title>Proceedings of the Fourth Annual Meeting of the Highway Research Board Held at Washington, D.C., December 4-5, 1924</title>
      <link>https://trid.trb.org/View/130831</link>
      <description><![CDATA[CONTENTS: REPORT OF COMMITTEE OF HIGHWAY FINANCE, H.R. TRUMBOWER REPORT OF COMMITTEE ON ECONOMIC THEORY OF HIGHWAY IMPROVEMENT INVESTIGATION OF ROLLING PLUS AIR RESISTANCE WIND RESISTANCE OF TIRE WEAR, W.C.MCNOWN REPORT OF COMMITTEE ON STRUCTURAL DESIGN OF ROADS WHAT SUBGRADE INVESTIGATIONS HAVE SHOWN DURING THE PAST YEAR, I.B.MULLIS SAND-CLAY ROAD INVESTIGATIONS, C.M.STRAHAN IMPACT AND STATIC LOADS ON ROAD SLABS, E.B. SMITH INVESTIGATION OF MOTOR TRUCK IMPACT, C.A. HOGENTOGLER FATIGUE OF CONCRETE, W.K. HATT THEORY OF STRESSES IN ROAD SLABS, H.M. WESTERGAARD TRAFFIC STRESSES PRODUCED IN CONCRETE ROADS, A.T. GOLDBECK SKEW ARCH INVESTIGATIONS, A.T. GOLDBECK DIGEST OF SUGGESTED PROBLEMS IN STRUCTURAL DESIGN OF HIGHWAYS, A.T. GOLDBECK PROGRESS REPORT ON SPECIAL INVESTIGATION ON THE ECONOMIC VALUE OF STEEL REINFORCEMENT IN CONCRETE ROAD SURFACES, C.A. HOGENTOGLER REPORT OF COMMITTEE ON CHARACTER AND USE OF ROAD MATERIALS SOUNDNESS TESTS FOR COARSE AGGREGATES, MO WITHEY GRADING OF AGGREGATES, R.W. CRUM SIGNIFICANCE OF THE TALBOT-JONES RATTLER AS TEST FOR CONCRETE IN ROAD SLABS, H.H. SCOFIELD ABSORPTION OF CONCRETE IN WATER AS AFFECTED BY AGGREGATES, ITS ULTIMATE EFFECT IN EXPANSION OF ROAD SLABS, F.C. LAND DECREASED STRENGTH OF CONCRETE WHEN WET, H.S. MATTIMORE EFFECT OF GRADING OF MINERAL AGGREGATES IN SHEET ASPHALT AND BITUMINOUS CONCRETE CONSTRUCTION RELATIVE TO DEFORMATION OF SURFACES UNDER TRAFFIC, B.A. ANDERTON RECOVERING BITUMINOUS MATERIAL FROM AGGREGATES WITHOUT CHANGING ITS CHARACTER, C.S. REEVE REPORT OF COMMITTEE ON MAINTENANCE DUST PREVENTION CRACK FILLERS FOR CONCRETE PAVEMENTS SNOW REMOVAL GUIDE, CAUTION AND DANGER SIGNS MAINTENANCE ACCOUNTING REPORT OF COMMITTEE OH HIGHWAY TRAFFIC ANALYSIS, G.E. HAMLIN]]></description>
      <pubDate>Thu, 09 Nov 2000 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/130831</guid>
    </item>
    <item>
      <title>AGGREGATE TOUGHNESS/ABRASION RESISTANCE AND DURABILITY/SOUNDNESS TESTS RELATED TO ASPHALT CONCRETE PERFORMANCE IN PAVEMENTS</title>
      <link>https://trid.trb.org/View/540899</link>
      <description><![CDATA[Numerous tests have been developed that empirically characterize aggregate without, necessarily, having a strong relationship to the performance of the final products incorporating these aggregates.  This seems to be particularly true for aggregate toughness and abrasion resistance and durability and soundness. Toughness/abrasion resistance and durability/soundness tests for characterizing aggregate used in asphalt concrete were identified and evaluated, and those test methods that best correlate with field performance were determined.  Based on a review of literature and specifications, laboratory tests for characterizing aggregate toughness/abrasion resistance and durability/soundness were selected.  Sixteen aggregate sources with poor to good performance histories were identified for evaluation with the selected suite of tests.  Performance histories of pavements containing these aggregates in asphalt concrete layers were established through personal contacts with state transportation agencies and performance evaluation questionnaires.  Aggregate properties from laboratory tests were correlated with field performance.  The micro-deval and magnesium sulfate soundness tests provide the best correlations with field performance of asphalt concrete and are recommended for characterizing aggregate toughness/abrasion resistance and durability/soundness.]]></description>
      <pubDate>Thu, 12 Nov 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/540899</guid>
    </item>
    <item>
      <title>AGGREGATE DEGRADATION TESTING BY GYRATORY TESTING MACHINE</title>
      <link>https://trid.trb.org/View/540144</link>
      <description><![CDATA[The Gyratory Testing Machine (GTM) equipped with an air roller was used to investigate the dry and wet degradation of six aggregates.  Three gradings similar to those for the Los Angeles (LA) abrasion test were evaluated in the GTM by using 25, 50, 100, and 200 revolutions.  The test data indicated substantial differences in gradation of the aggregates after testing.  Type and initial size of the aggregate influenced the amount and characteristics of degradation.  Regression analyses of the data resulted in the development of GTM degradation prediction equations using the LA abrasion loss.  The most important goal for the GTM test results was to define gradation and the effect of moisture, instead of using only a relative indicator such as LA abrasion loss.  Four aggregate blends were tested in the GTM to simulate degradation produced in handling and processing of aggregate through a drum mixer and drum dryer.  These test results duplicated some of the gradations obtained after the material had passed through the drum.]]></description>
      <pubDate>Wed, 07 Oct 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/540144</guid>
    </item>
    <item>
      <title>MUNICIPAL SOLID WASTE BOTTOM ASH AS PORTLAND CEMENT CONCRETE INGREDIENT</title>
      <link>https://trid.trb.org/View/635872</link>
      <description><![CDATA[The disposal of municipal solid waste ash has become a significant economic and environmental issue.  Municipal solid waste ash can be considered to have a fly ash and a bottom ash component.  Municipal solid waste bottom ash (MSWBA) from a refuse-derived fuel facility was evaluated as a potential portland cement concrete ingredient.  Portland cement-related ASTM methods and other analytical techniques such as x-ray diffraction were used.  The sample MSWBA was found to be a marginal concrete aggregate.  The sample MSWBA met most ASTM C 331 standards such as size gradation, but the high angularity and brittle nature of the MSWBA would significantly affect concrete workability.  The MSWBA sulfate and chloride concentrations also were high enough to create potential sulfate attack and reinforcing steel corrosion problems.  Iron removal and aggregate processes such as size control offer cost-effective methods to improve MSWBA for use as an aggregate.]]></description>
      <pubDate>Thu, 17 Sep 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/635872</guid>
    </item>
    <item>
      <title>AGGREGATE TOUGHNESS/ABRASION RESISTANCE AND DURABILITY/SOUNDNESS TESTS RELATED TO ASPHALT CONCRETE PERFORMANCE IN PAVEMENTS</title>
      <link>https://trid.trb.org/View/484757</link>
      <description><![CDATA[Numerous tests have been developed to empirically characterize aggregate without, necessarily, a strong relationship with the performance of the final products incorporating these aggregates.  This seems to be particularly true for aggregate "toughness and abrasion resistance" and "durability and soundness".  The purpose of this research was to identify and evaluate toughness/abrasion resistance and durability/soundness tests for characterizing aggregate used in asphalt concrete and to determine those test methods that best correlate with field performance.  Based on a review of literature and specifications, laboratory tests for characterizing aggregate toughness/abrasion resistance and durability/soundness were selected.  Sixteen aggregate sources with poor to good performance histories were identified for evaluation with the selected suite of tests.  Performance histories of pavements containing these aggregates in asphalt concrete layers were established through personal contacts with state transportation agencies and performance evaluation questionnaires.  Aggregate properties from laboratory tests were correlated with field performance.  The Micro-Deval and magnesium sulfate soundness tests provide the best correlations with field performance of asphalt concrete, and are recommended for characterizing aggregate toughness/abrasion resistance and durability/soundness.]]></description>
      <pubDate>Mon, 03 Aug 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/484757</guid>
    </item>
    <item>
      <title>TESTS FOR PLASTIC FINES IN AGGREGATES RELATED TO STRIPPING IN ASPHALT PAVING MIXTURES</title>
      <link>https://trid.trb.org/View/484756</link>
      <description><![CDATA[This study was undertaken for determining the best aggregate test method that indicates the presence of detrimental plastic fines in the fine aggregate, which may induce stripping in hot mix asphalt (HMA) mixtures.  Ten fine aggregates representing a wide range of mineralogical compositions and plasticity characteristics were used.  Their plasticity characteristics were evaluated by three test methods:  (a) sand equivalent value, (b) plasticity index, and (c) methylene blue value.  Ten HMA mixtures were made using a common limestone coarse aggregate but these different fine aggregates.  Superpave volumetric mix design was used to establish the optimum asphalt contents.  Two mix validation tests:  (a) American Association of State Highway and Transportation Officials (AASHTO) T283 and (b) the Hamburg wheel-tracking device were used to evaluate the stripping potential of the ten HMA mixtures.  Statistical analysis of the aggregate test data and the mix validation test data shows that the methylene blue test is best related to stripping in asphalt paving mixtures.]]></description>
      <pubDate>Mon, 03 Aug 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/484756</guid>
    </item>
    <item>
      <title>ACCELERATED LOAD TESTS FOR ASPHALT-AGGREGATE MIXTURES AND THEIR ROLE IN AAMAS</title>
      <link>https://trid.trb.org/View/486838</link>
      <description><![CDATA[This paper presents the results obtained to date on SHRP Project A-003A. Included has been a discussion of the accelerated load tests (ALT's) which have been developed to measure the fatigue, permanent deformation, thermal cracking, aging, water sensitivity, and stiffness characteristics of asphalt-aggregate mixtures. A plan to validate the results of tests of asphalt properties emanating from SHRP Project A-002A and the efficacy of the ALTs developed herein to define mixture performance has also been presented.]]></description>
      <pubDate>Fri, 05 Jun 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/486838</guid>
    </item>
  </channel>
</rss>