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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
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    <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>
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    <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>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>PRE-EVALUATION OF PAVEMENT MATERIALS FOR SKID-RESISTANCE A REVIEW OF U. S. TECHNIQUES</title>
      <link>https://trid.trb.org/View/110499</link>
      <description><![CDATA[THIS PAPER IS ESSENTIALLY A REVIEW OF EXISTING METHODS, USED IN THE LABORATORY, FOR STUDYING PAVEMENT MATERIALS AS RELATED TO THEIR SKID-RESISTANT QUALITIES. IT CONSISTS OF DESCRIPTIONS OF TEST EQUIPMENT AND TESTING TECHNIQUES ALONG WITH EXAMPLES OF DATA. IT REPORTS THAT THE LABORATORY TESTS HAVE GENERALLY DEVELOPED AROUND TWO EVALUATION METHODS. ONE IS TO STUDY COMPACTED PAVEMENT MIXTURES; THE OTHER IS TO TEST AGGREGATE PARTICLES OR STONE CHUNKS. BOTH TYPES OF METHODS SEEM TO BE USEFUL IN EVALUATING PAVEMENT MATERIALS PRIOR TO THEIR USE. THE METHODS REPORTED, HOWEVER, DO NOT HAVE WIDESPREAD USE AND ARE NOT ENTIRELY ALIKE. PROBABLY THE PORTLAND CEMENT ASSOCIATION AND THE TENNESSEE HIGHWAY RESEARCH PROGRAM EQUIPMENT HAVE THE GREATEST SIMILARITY, BUT TEST PROCEDURES ARE DIFFERENT. THERE ARE SEVERAL NEW METHODS THAT ARE BEING CONSTRUCTED THAT INCLUDE DESIGN IDEAS FROM OLDER METHODS. ALONG WITH THE MECHANIZED LABORATORY TEST METHODS, INFORMATION ON SUPPLEMENTAL PRE-EVALUATION TOOLS IS REPORTED, INCLUDING PROCEDURES FOR STUDYING THE INFLUENCE ON SKID RESISTANCE OF SAND-SIZE SILICEOUS PARTICLES, MINERAL CONTENTS OF AGGREGATES, AND PAVEMENT PERMEABILITY. IT IS CONCLUDED THAT THE PRE-EVALUATION OF MATERIALS IS A PRACTICAL APPROACH TO OBTAINING BETTER SKID-RESISTANT PAVEMENTS, BUT ADDITIONAL WORK IS NEEDED TO RELATE LABORATORY RESULTS TO FIELD PERFORMANCE. /AUTHOR/]]></description>
      <pubDate>Thu, 28 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110499</guid>
    </item>
    <item>
      <title>ASTM STANDARDS ON MINERAL AGGREGATES AND CONCRETE</title>
      <link>https://trid.trb.org/View/108393</link>
      <description><![CDATA[ASTM SPECIFICATIONS, METHODS OF TESTING, AND DEFINITIONS RELATED TO MINERAL AGGREGATES AND CONCRETES ARE COMPILED. SUBJECTS INCLUDED ARE AGGREGATES, CONCRETE, CONCRETE CURING MATERIALS AND EXPANSION JOINT FILLERS, CONCRETE REINFORCING STEEL, AND BRICK AND BLOCK PAVEMENT MATERIALS.]]></description>
      <pubDate>Thu, 24 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/108393</guid>
    </item>
    <item>
      <title>REACTIONS OF AGGREGATES INVOLVING SOLUBILITY, OXIDATION, SULFATES, OR SULFIDES</title>
      <link>https://trid.trb.org/View/110434</link>
      <description><![CDATA[THIS REPORT COVERS AVAILABLE INFORMATION ON REACTIONS INVOLVING SOLUBILITY OR OXIDATION OF AGGREGATES WHILE THEY ARE ENCLOSED IN CONCRETE AND REACTIONS INVOLVING RELEASE OF SULFATES OR SULFIDES FROM AGGREGATES ENCLOSED IN CONCRETE. EXPERIENCE INDICATES THAT THESE PHENOMENA MAY CREATE LOCAL PROBLEMS THAT USUALLY TAKE THE FORM OF UNSIGHTLY CONDITIONS ON CONCRETE CONSTRUCTION, SUCH AS STAINING OR SPORADIC SPALLING AND POP-OUT FORMATION. RELIABLE METHODS FOR DETECTING DELETERIOUSLY REACTIVE FORMS OFFERROUS SULFIDES IN MINERAL AGGREGATES WOULD BE A WORTHWHILE ADDITION TO TESTING PROCEDURES IN AREAS WHERE THESE MINERALS HAVE BEEN FOUND TO BE OF SIGNIFICANCE IN THE PERFORMANCE OF CONCRETE. /AUTHOR/]]></description>
      <pubDate>Thu, 03 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110434</guid>
    </item>
    <item>
      <title>A LITERATURE REVIEW OF LIQUID ANTISTRIPPING AGENTS, MINERAL ADDITIVES AND TESTS FOR MEASURING STRIPPING</title>
      <link>https://trid.trb.org/View/344884</link>
      <description><![CDATA[The purpose of this literature review is to search the literature in the area of chemical and mineral agents used to promote adhesion of asphalt-aggregate mixes.  In addition, tests performed to measure the effectiveness of these agents were reviewed.  The information gained through this literature search and review provides background information for the research being performed in the SHRP A-003B contract.  The review has been divided into three sections:  1) liquid antistripping agents; 2) lime and other mineral agents; and 3) tests for measuring stripping.  This literature search was performed using on-line chemical abstracts for documents in the time period of 1967 to present.]]></description>
      <pubDate>Thu, 31 Dec 1992 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/344884</guid>
    </item>
    <item>
      <title>THE USE OF AUSTRIAN BLAST FURNACE SLAG IN BITUMINOUS ROAD CONSTRUCTION</title>
      <link>https://trid.trb.org/View/179733</link>
      <description><![CDATA[Blast furnace slag (ld) from the Vereinigten Oesterreichischen Stahlwerke AG (VOEST) at Linz has been examined in respect of its use in bituminous road construction.  Normal grades of slag production for eight months were subjected to authorized sampling.  The investigation into the mineral aggregate followed according to relative Austrian, American and English standards.  The chemical and phase analyses were supplemented by means of the test on lime swelling, 40 percent of the samples showed a free CaO content of 4 to 5 percent, however no sample exhibited the appearance of being destroyed through increasing its volume when coming into contact with water. Destruction from "iron decomposition" is not possible due to the low sulphur content of 0.5 per cent maximum.  Trial asphalt mixes, made from various size aggregates from samples abstracted at various times, underwent extended suitability tests and were compared with conventional asphalt mixes.  The asphalt mixes were also made using a mixture of blast furnace slag and diabase.  The evaluation of trial results allows the conclusion to be made that asphalt mixes, produced with blast furnace slag have similar or more favourable qualities in use than asphalt made from stone.  It should of course be noted that the establishment of optimum binder contents synchronized with the varying crude density of the ld slag is necessary and a closer series of control tests is called for.  (TRRL)]]></description>
      <pubDate>Fri, 28 May 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/179733</guid>
    </item>
    <item>
      <title>A PROPOSED SECONDARY MINERAL RATING FOR BASALT ROAD AGGREGATE DURABILITY</title>
      <link>https://trid.trb.org/View/166430</link>
      <description><![CDATA[A secondary mineral rating (denoted rsm) for the durability of basalt road aggregates is proposed.  It is based on the amount (p), type (M) and distribution (tr) in the aggregate of clay and other secondary minerals.  Rsm values are calculated from (sigma (p.m.))tr where p is a percentage, M ranges from 2 to 10, and tr ranges from 0.3 to 2.0.  The secondary mineral rating correlates well with Washington degradation values, methylene- blue dye absorption data and surface area measurements.  It is tentatively suggested that for basalts in victoria, rsm values of 140 or less indicate a durable material and that values greater than 140 indicate potentially unsound stone.  An rsm value of 140 corresponds to a Washington degradation value of about 40, a methylene- blue dye absorption value of 3.1 ml/g, a total surface area of 97 m**2/g, and a secondary mineral content of 30 per cent.  Basalts with these properties would only just satisfy Country Roads Board (Victoria) requirements for class 3 sub-base materials.  The determinations of rsm values are seen as being essential for the initial investigation of a basalt quarry site and for identifying the reasons for aggregate failure in service.  For day- to- day use, methylene- blue values and total surface area measurements could serve similar useful prediction purposes in addition to the normal mechanical tests required by the purchasing authority.  (Author/TRRL)]]></description>
      <pubDate>Sat, 15 Aug 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/166430</guid>
    </item>
    <item>
      <title>EQUIPMENT FOR THE MECHANICAL TREATMENT OF QUARRY MATERIALS FOR THE PRODUCTION OF ROAD AGGREGATES. (8) DEFINITION AND ROLE OF TESTING STATIONS AND LABORATORIES IN THE MANUFACTURERS-INSTALLERS OF EQUIPMENT</title>
      <link>https://trid.trb.org/View/146707</link>
      <description><![CDATA[Taking as an example the testing station of the firm dragon, the author describes the equipment: (1) crushing, grinding, screening and lifting plant for a commercial concern and mini-installation for fine grinding; (2) test equipment for dynamic crushing and grinding, sand equivalent, bar sieve for the shape test; (3) laboratory equipment for the rapid determination of the average content of some ingredients of the mineral materials studied.  Applications of the tests are reviewed, and the effects of increasingly strict standards set by the administrative authorities on the production of road aggregates are examined.  Mention is made of tests carried out on samples of material to determine the adequate treatment for the problem arising, and of tests and controls conducted in quarries.  (TRRL)]]></description>
      <pubDate>Tue, 15 Jan 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146707</guid>
    </item>
    <item>
      <title>A STUDY OF THE FREEZE-THAW CHARACTERISTICS OF SELECTED NEVADA MINERAL AGGREGATES</title>
      <link>https://trid.trb.org/View/106144</link>
      <description><![CDATA[THE OBJECTIVES WERE: TO EXAMINE MINERAL AGGREGATES THAT WERE USED IN PORTLAND CEMENT CONCRETE HIGHWAY STRUCTURES AND PAVEMENTS; TO NOTE THE RESISTANCE OR LACK OF RESISTANCE OF THESE MINERALS TO FREEZE-THAW CYCLES; TO DETERMINE WHICH MATERIALS ARE LIKELY TO BE EXCESSIVELY DAMAGED BY EXPOSURE; AND TO DETERMINE THE EFFECT OF THE MOST FREQUENTLY USED METHODS IN PROTECTING PORTLAND CEMENT CONCRETE STRUCTURES FROM FREEZE-THAW DAMAGES. A SIMPLIFIED DISCUSSION, MEANING THAT FREE BOUNDARIES ARE ASSUMED FOR AGGREGATE SURFACES, IS PRESENTED AS A MEANS OF UNDERSTANDING THE COMPLEX MECHANISMS OF FROST DAMAGE IN AGGREGATESE CONTAINED IN CONCRETE. TABULAR DATA, SUPPLEMENTED BY GRAPHICAL DATA AND DISCUSSIONS, ARE PRESENTED FOR (1) PROPERTIES OF TYPE II CEMENT, (2) PETROGRAPHIC DESCRIPTION OF SAMPLES, (3) PETROGRAPHIC PERCENTAGES PRESENT IN AGGREGATES, (4) PROPERTIES OF COARSE AGGREGATES, (5) PROPERTIES OF FINE AGGREGATES, (6) DURABILITY COMPARISONS, WITH AND WITHOUT AIR ENTRAINMENT, (7) RELATIONSHIPS OF LONGITUDIANL DIMENSIONAL STABILITY, (8) PERMEABILITY TEST RESULTS, AND (9) CAPILLARY PORE DIAMETERS OF MINERAL AGGREGATES. THE FOLLOWING RECOMMENDATIONS WERE SUGGESTED: (1) ALL CONCRETE, POURED IN AREAS WHERE CONTINUOUS FROST DAMAGE IS AT ALL POSSIBLE, SHOULD BE SPECIFIED TO CONTAIN A MINIMUM OF 5% ENTRAINED AIR MEASURED AT THE TIME AND SITE OF PLACEMENT. (2) SPECIMENS USED IN CUMULATIVE LENGTH CHANGE TEST SHOULD EXPERIENCE NO MORE THAN AN OVERALL INCREASE IN LENGTH OF 0.001 INCH IN A 10 IN. GAGE LENGTH AFTER 7 CYCLES (1 DAY) OF FREEZE-THAW IN KEEPING WITH ASTM C290-63T: SHOULD THE SPECIMENS LENGTH EXCEED 0.002 INCH IN 14 CYCLES (2 DAYS), THE MATERIAL SHOULD BE STUDIED IN-DEPTH IN A LABORATORY BEFORE BEING CONSIDERED FOR FIELD USE. (3) AN IN-DEPTH STUDY OF AGGREGATE PORE SYSTEMS SHOULD BE CONDUCTED FOR ASCERTAINING A STATISTICAL CORRELATION BETWEEN THE VARIOUS PORE PROPERTIES AND THE DURABILITY OF INDIVIDUAL AGGREGATES. (4) A RELIABLE, FULLY ELECTRONICALLY INSTRUMENTED, FIRST-CYCLE FREEZE DISTILLATION TEST POSSESSING POSITIVE CONTROL OVER THE RATE OF FREEZING SHOULD BE DEVELOPED. (5) THE POSSIBILITY OF DECREASING THE CURING TIMES (NOW 14 DAYS) SHOULD BE CONSIDERED TO PERHAPS 7 DAYS.]]></description>
      <pubDate>Tue, 11 Dec 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106144</guid>
    </item>
    <item>
      <title>THE VARIATION OF THE ANGLE OF INTERNAL FRICTION WITH SIZE CONSIST FOR MECHANICALLY-CHIPPED MATERIAL</title>
      <link>https://trid.trb.org/View/105843</link>
      <description><![CDATA[IN ORDER TO IMPROVE ASPECTS OF MATERIALS HANDLING IN THE RAPID EXCAVATION PROCESS, RESEARCH IS UNDERWAY TO CHARACTERIZE THE MUCK FROM MECHANICAL TUNNEL BORING MACHINES. THE SPECIFIC PROJECT INVOLVES THE CORRELATION OF THE ANGLE IN INTERNAL FRICTION, TO THE SIZE CONSIST, OFTEN TERMED GRADATION, OF THIS MECHANICALLY-CHIPPED MATERIAL. EXISTING REFERENCES DEMONSTRATE THAT THIS ANGLE DEPENDS UPON MINERAL TYPE, AND FOR A GIVEN MINERAL TYPE UPON SIZE OF PARTICLES. PARTICLE SHAPE IS USUALLY A FUNCTION OF MINERALOGICAL CHARACTER AND IS NOT AS IMPORTANT A PARAMETER IN INFLUENCING THIS ANGLE. THE PROJECT INVESTIGATORS HAVE VISITED NINE TUNNELS AND HAVE SAMPLES FROM SEVEN; ROCK TYPES COLLECTED INCLUDE GRANITE, LIMESTONE, MICA SHIST, SANDSTONE, AND SHALE. A FACILITY FOR TESTING THESE SPECIMENS IS BEING PREPARED AND WILL CONSIST OF A FLEXIBLE ARRANGEMENT OF 2.8 OR 6-INCH TRIAXIAL CELLS, PRESSURE SYSTEM, TESTING MACHINE, AND AUTOMATED DATA COLLECTION SYSTEM. THE LATTER WILL INSURE THE REMOVAL OF PERSONAL BIAS FROM THE DATA. TESTING OF SAMPLES CAN BEGIN SOON AFTER A LOAD CELL IS DELIVERED. /AUTHOR/]]></description>
      <pubDate>Tue, 19 Jun 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/105843</guid>
    </item>
    <item>
      <title>POROSITY AND PERMEABILITY STUDIES OF VIRGINIA AGGREGATES</title>
      <link>https://trid.trb.org/View/106139</link>
      <description><![CDATA[ALL OF THE AGGREGATES STUDIED SHOWED RELATIVELY LOW POROSITIES RANGING FROM A HIGH OF 3.66% TO A LOW OF 0.19%, WITH MOST VALUES BEING LESS THAN 1%. PORE SIZE DISTRIBUTIONS SHOWED CARBONATE AGGREGATES TO HAVE PORES OF NEARLY ALL ONE SIZE WHILE IGNEOUS AND METAMORPHIC ROCKS CONTAIN SEVERAL SIZES. PERMEABILITIES OF ALL ROCKS FELL IN THE RANGE OF 10 TO THE MINUS 1 TO 10 TO THE MINUS 5 MILLIDARCYS. A SET OF EQUATIONS WAS DEVELOPED TO RELATE POROSITY AND PERMEABILITY VALUES. IN ORDER TO INVESTIGATE THE FEASIBILITY OF A RAPID TEST METHOD TO PREDICT AGGREGATE WATER ABSORPTION, A CORRELATION BETWEEN POROSITY DETERMINED BY HIGH PRESSURE MERCURY INJECTION AND POROSITY DETERMINED BY LONG-TERM WATER ABSORPTION WAS ATTEMPTED. THE RESULTS RANGED FROM POOR TO FAIR. INCORPORATION OF OTHER PARAMETERS SUCH AS RATE OF WATER UPTAKE, PORE SIZE, AND ROCK GRAIN SIZE SERVED TO MAKE ONLY MODEST IMPROVEMENTS IN THE CORRELATION. IN VIEW OF THIS LACK OF STRONG CORRELATION NO RECOMMENDATION CONCERNING A RAPID TEST METHOD IS OFFERED AT THIS TIME. /AUTHOR/]]></description>
      <pubDate>Mon, 02 Apr 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106139</guid>
    </item>
    <item>
      <title>LATE-EXPANSION ALKALI-REACTIVE CARBONATE ROCKS</title>
      <link>https://trid.trb.org/View/110538</link>
      <description><![CDATA[SOME ALKALI-REACTIVE CARBONATE ROCKS OF THE ORDOVICIAN GULL RIVER FORMATION IN ONTARIO ARE CHARACTERIZED BY A SHRINKAGE PERIOD PRECEEDING EXPANSION WHEN TESTED IN 1 NORMAL SODIUM HYDROXIDE. THESE LATE-EXPANSION ROCKS HAVE A SHRINKAGE PERIOD OF AT LEAST 10 WEEKS, MAXIMUM SHRINKAGE OF AT LEAST 0.03 PERCENT, AND LATER MINIMUM EXPANSION OF 0.20 PERCENT. PETROGRAPHIC EXAMINATION SHOW THE ROCKS TO BE SANDY OR SILTY ARGILLACEOUS CALCITIC DOLOMITES. TYPICAL SAMPLES HAVE 3 TO 5 PERCENT ABSORPTION, BULK SPECIFIC GRAVITY BELOW 2.60, MORE THAN 20 PERCENT ACID-INSOLUBLE RESIDUES, AND 75 TO 87 PERCENT DOLOMITE IN THE CARBONATES. /AUTHOR/]]></description>
      <pubDate>Mon, 13 Dec 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/110538</guid>
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