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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>
    <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>SETTING OF GRANULATED SLAG UNDER ALKALINE ACTIVATION</title>
      <link>https://trid.trb.org/View/1071832</link>
      <description><![CDATA[THE SETTING MECHANISM OF GRANULATED SLAG IS SHOWN TO BE IN AGREEMENT WITH  THE THEORY DEVELOPED BY LE CHATELIER, ACCORDING TO WHICH THE ANHYDROUS BINDER CONSTITUENTS ARE DISSOLVED IN THE MIXING WATER AND GIVE RISE TO THE FORMATION OF HYDRATED COMPOUNDS OF LOW SOLUBILITY THAT CRYSTALLISE, THUS BONDING THE PARTICLES TOGETHER. THE NATURE OF THESE COMPOUNDS IS GOVERNED BY THERMODYNAMIC EQUILIBRIUM AND THEIR NUMBER BY THE RULE GOVERNING THE PHASES OF THE STATE OF EQUILIBRIUM. IF SODIUM IS USED AS AN ACTIVATING AGENT,  THREE HYDRATION PHASES WILL OCCUR, BUT ONLY TWO IF LIME OR QUICKLIME IS USED. X-RAYS SHOW THE NATURE OF THE COMPOUNDS. THE EVOLUTION TAKING PLACE IS LINKED TO THE LACK OF EQUILIBRIUM OF THE SLAG IMMERSED IN THE SOLUTION.  THIS LACK OF EQUILIBRIUM LEADS TO A PROGRESSIVE DISSOLUTION OF THE SLAG WHICH WAS OBSERVED BY MEANS OF ELECTRON MICROSCOPY. THE LATTER CLEARLY SHOWS THE ROLE PLAYED BY EACH TYPE OF HYDRATE. PHASE GRAPHS WERE USED TO EXPLAIN THE CHEMISTRY OF HYDRATION. CHARTS SHOWING THE EQUILIBRIUM OF THE CAO,  S102, AL203, H20 QUATERNARY SYSTEM WERE ALSO UTILIZED.]]></description>
      <pubDate>Sun, 21 Nov 2010 13:09:57 GMT</pubDate>
      <guid>https://trid.trb.org/View/1071832</guid>
    </item>
    <item>
      <title>LTMS TEST STANDARDS: MISCIBILITY OF BITUMINOUS EMULSIONS WITH WATER (NLT-143/72)</title>
      <link>https://trid.trb.org/View/1069296</link>
      <description><![CDATA[THIS STANDARD DESCRIBES THE PROCEDURE FOR CARRYING OUT THE MISCIBILITY TEST WITH WATER OF BITUMINOUS EMULSIONS. THIS TEST APPLIES ONLY TO EMULSIONS  WITH SLOW OR MEDIUM BREAKING.  IT IS USED TO DETERMINE WHETHER COAGULATION OCCURS WHEN THE EMULSION IS DILUTED WITH WATER.  TWO PROCESSES ARE EMPLOYED: THE FIRST IS VISUAL EVALUATION, THE SECOND IS A QUANTITATIVE EVALUATION.  DETAILS ARE GIVEN OF THE EQUIPMENT AND TEST PROCEDURE USED AND RESULTS OBTAINED.  OTHER CORRESPONDING OFFICIAL STANDARDS ARE MENTIONED.]]></description>
      <pubDate>Sun, 21 Nov 2010 11:38:42 GMT</pubDate>
      <guid>https://trid.trb.org/View/1069296</guid>
    </item>
    <item>
      <title>LTMS TEST STANDARDS: SOLUBILITY OF BITUMINOUS MATERIALS IN ORGANIC SOLVENTS (NLT-130/72)</title>
      <link>https://trid.trb.org/View/1069272</link>
      <description><![CDATA[THIS STANDARD DESCRIBES THE TEST PROCEDURE FOR DETERMINING THE SOLUBILITY  OF PAVEMENT BITUMINOUS MATERIALS SUCH AS TAR AND ASPHALT BITUMEN CONTAINING NO OR LITTLE MINERAL MATTER, IN ORGANIC SOLVENTS.  IT ALSO GIVES THE TEST PROCEDURE TO USE FOR CALCULATING THE PROPORTION OF SOLUBLE BITUMEN IN CARBON TETRACHLORIDE.  THE EQUIPMENT UTILIZED IS DESCRIBED TOGETHER WITH THE TEST PROCEDURE AND RESULTS OBTAINED. OTHER OFFICIAL CORRESPONDING STANDARDS ARE CITED.]]></description>
      <pubDate>Sun, 21 Nov 2010 11:38:11 GMT</pubDate>
      <guid>https://trid.trb.org/View/1069272</guid>
    </item>
    <item>
      <title>DESCRIPTION OF A TRICHLORETHYLENE RECYCLING SYSTEM</title>
      <link>https://trid.trb.org/View/1069221</link>
      <description><![CDATA[DETAILS ARE PRESENTED OF A RECYCLING SYSTEM BY THE REFLUX DISTILLATION OF  TRICHLORETHYLENE USED AS A SOLVENT IN BINDER TESTS.  ALL THE UNITS AND THE CONTROLS ARE DESCRIBED FROM THE VIEWPOINT OF MAKING THEIR USE AS AUTOMATIC AS POSSIBLE, WITH A MENTION OF THE PRODUCTION AND THE QUALITY OF THE PRODUCT RECYCLED AND THE ENERGY CONSUMPTION AND COST OF THE SYSTEM.]]></description>
      <pubDate>Sun, 21 Nov 2010 11:37:01 GMT</pubDate>
      <guid>https://trid.trb.org/View/1069221</guid>
    </item>
    <item>
      <title>LTMS TESTING STANDARDS. THE SOLUBLE SULPHATE CONTENT OF SOILS</title>
      <link>https://trid.trb.org/View/1069216</link>
      <description><![CDATA[THIS STANDARD DESCRIBES THE METHOD FOLLOWED FOR DETERMINING THE PROPORTION OF SOLUBLE SULPHATE IN WATER, DISSOLVING THE MATERIAL BY AGITATING IT IN  WATER, THEN PRECIPITATING THE DISSOLVED SULPHATES BY MEANS OF A SOLUTION  OF BARIUM CHLORIDE.  IT DESCRIBES IN DETAIL THE APPARATUS USED TOGETHER WITH THE TEST PROCEDURE AND THE RESULTS.  OTHER CORRESPONDING OFFICIAL STANDARDS ARE LISTED.]]></description>
      <pubDate>Sun, 21 Nov 2010 11:36:55 GMT</pubDate>
      <guid>https://trid.trb.org/View/1069216</guid>
    </item>
    <item>
      <title>BRIDGE FOUNDATIONS ON KARST - THE A15 MOTORWAY VIADUCT</title>
      <link>https://trid.trb.org/View/1068889</link>
      <description><![CDATA[TO DESIGN THE FOUNDATIONS OF AN ENGINEERING STRUCTURE ON KARST MEANS A DIFFICULT CHOICE BETWEEN: (1) DEEP FOUNDATIONS REACHING BELOW THE LEVEL OF THE KARST AND ACCOUNT TAKEN OF THE AFFECTS OF THE POSSIBLE CAVING-IN OF EXISTING CAVITIES, AND (2) SHALLOW OR FAIRLY DEEP FOUNDATIONS REACHING DOWN TO THE LEVEL JUST ABOVE KARST LEVEL USING INJECTION TO CONSOLIDATE THE GROUND OR CARRYING OUT PERIODIC STABILITY CONTROLS.  THE PROBLEM IS EVEN MORE DIFFICULT WHEN THE TERRAIN IS GYPSUM WHEN MARKED MODIFICATIONS IN THE GEOTECHNICAL CHARACTERISTICS OF THE SUBSOIL CAN OCCUR DURING THE LIFETIME OF THE STRUCTURE CAUSED BY DISSOLUTION.  AN EXAMPLE IS GIVEN OF THE A15 MOTORWAY WHERE IT CROSSES THE PORT OF GENNEVILLIERS.  A GEOLOGICAL MODEL WAS DERIVED WHICH CORRELATED THE KARSTIFICATION OF DEEP GYPSUM AND THE GEOMORPHOLOGICAL EVOLUTION IN THE BEND OF THE RIVER SEINE DURING THE QUARTENARY ERA.   THE FOLLOWING ZONES WERE IDENTIFIED: A STABILIZED SONE, A ZONE WITH PREDOMINANTLY MECHANICAL EVOLUTION AND A ZONE WITH PREDOMINANTLY CHEMICAL EVOLUTION.  IT BECAME APPARENT THAT THE ONLY PHENOMENON TO BE FEARED WAS A PROGRESSIVE SETTLEMENT AND NOT A SUDDEN COLLAPSE OF THE GROUND.  THE SOLUTION CHOSEN FOR THE FOUNDATION WAS THE CONSTRUCTION OF PILES ANCHORED IN BEAUCHAMP SAND AND INJECTION OF THE UNDERLAYING MARL AND GRAVELLY MARL WITH A SAND-BENTONITE-CEMENT GROUT.]]></description>
      <pubDate>Sun, 21 Nov 2010 11:28:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/1068889</guid>
    </item>
    <item>
      <title>CHEMICAL ATTACK OF SOLUTIONS: EFFECT OF CONCENTRATION, TEMPERATURES AND IMPURITIES</title>
      <link>https://trid.trb.org/View/1065592</link>
      <description><![CDATA[CONCRETE IS ATTACKED LESS VIGOROUSLY BY SEA WATER THAN BY PURE SODIUM OR MAGNESIUM SULPHATE SOLUTIONS OF THE SAME CONCENTRATION.  IT WAS THEREFORE TESTED WHETHER, APART FROM SULPHATE, THE ACTIVE COMPONENTS, CHLORIDE AND HYDROGEN CARBONATE, IN SEA WATER ARE RESPONSIBLE FOR THE REDUCTION IN SULPHATE ATTACK.  FOR THIS PURPOSE, SMALL PRISMS (1 X 1 X 6 CM) AND FLAT PRISMS  (1 X 4 X 16 CM) OF MORTAR ACCORDING TO DIN 1164 WERE STORED IN SODIUM AND MAGNESIUM SULPHATE SOLUTIONS CONTAINING 2500 MG OF SO4"/1 WITH AND WITHOUT ADDITION OF 30G NACL/L AND 0.19G NAHCO3/L.  THREE PORTLAND CEMENTS WITH  THEORETICAL CONTENTS OF 12, 8 AND 0 % BY WEIGHT OF TRICALCIUM ALUMINATE AS WELL AS 3 BLAST FURNACE CEMENTS WITH 50, 65 AND 77% BY WEIGHT METALLURGICAL SAND WERE CHOSEN AS A BINDER.  THE SULPHATE ATTACK IS IN GENERAL INCREASED BY ADDING CHLORIDE.  ON THE OTHER HAND, SODIUM HYDROGEN CARBONATE CLEARLY REDUCES THE SULPHATE ATTACK.  X-RAY TESTS AND MICROSCOPIC EXAMINATION CLEARLY SHOW THAT THE FORMATION OF CALCITE ON THE SURFACE OF TEST SPECIMENS IS RESPONSIBLE FOR THIS.]]></description>
      <pubDate>Sun, 21 Nov 2010 09:55:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/1065592</guid>
    </item>
    <item>
      <title>HEAT DEVELOPMENT DURING CEMENT HYDRATION</title>
      <link>https://trid.trb.org/View/1065591</link>
      <description><![CDATA[IN THE HARDENING OF CEMENTS, HEAT OF HYDRATION IS PRODUCED WHICH, ACCORDING TO CHARACTERISTICS AND COMPOSITION OF THE CEMENT VARIES IN AMOUNT AND WHICH MAY LEAD TO TEMPERATURE INCREASES IN MASSIVE CONCRETE STRUCTURAL COMPONENTS.  THE HEAT OF HYDRATION OF A CEMENT, AMONG OTHER THINGS, IS DETERMINED FROM THE DIFFERENCE OF THE HEATS OF SOLUTION OF THE NON-HYDRATED CEMENT AND THE 20 DEGREES C ISOTHERM FOR HYDRATED CEMENT.  TESTS SHOWED THAT THE ACCURACY OF THE DETERMINATION OF THE HEAT OF SOLUTION DEPENDS TO A GREAT  EXTENT ON THE WATER CONTENT AND THE WATER BONDING OF THE HYDRATED CEMENT. THE HEAT OF SOLUTION OF THE CEMENT PASTE INCREASES WITH DECREASE IN WATER CONTENT.  THE TESTS ALSO PERMIT OF CONCLUSIONS REGARDING THE TYPE OF WATER BONDING IN THE CEMENT PASTE. APART FROM WHETHER THE WATER IN IT IS CHEMICALLY MORE OR LESS TIGHTLY BONDED OR IS ONLY ABSORBED ON THE SURFACE OF THE HYDRATED PHASE, A VARYING INCREASE IN HEAT OF SOLUTION OCCURS WHICH IS HOWEVER CONSTANT FOR THE DIFFERENT DRYING STATES.]]></description>
      <pubDate>Sun, 21 Nov 2010 09:55:01 GMT</pubDate>
      <guid>https://trid.trb.org/View/1065591</guid>
    </item>
    <item>
      <title>BEHAVIOUR OF CONCRETE IN LIME-SOLUBLE CARBONIC ACID</title>
      <link>https://trid.trb.org/View/1065587</link>
      <description><![CDATA[LONG-PERIOD TESTS ARE CARRIED OUT TO DETERMINE WHETHER THE RESISTANCE OF DENSE CONCRETE TO ATTACK BY ACIDS, PARTICULARLY OF LIME SOLUBLE CARBONIC ACID CAN BE INCREASED BY USING CEMENTS CONTAINING A LITTLE LIME, OR USING LIMESTONE AS AGGREGATE.  FOR THIS PURPOSE, FINE CONCRETE PRISMS 4 X 4 X16 CM OF SEVERAL PORTLAND CEMENTS OF DIFFERENT COMPOSITION-AS WELL AS OF METALLURGICAL SAND AND TRASS-CONTAINING CEMENTS WERE PREPARED.  RHINE SAND AND LIMESTONE CHIPPINGS WERE USED AS AGGREGATE.  THE FINE CONCRETES CONTAINED 350 KG OF CEMENT PER SQUARE METRE, THE WATER/CEMENT VALUE WAS 0.50.  AFTER  28 DAYS CONDITIONING, THE PRISMS WERE EXPOSED TO ATTACK BY WATER CONSTANTLY SATURATED WITH CARBON DIOXIDE.]]></description>
      <pubDate>Sun, 21 Nov 2010 09:54:55 GMT</pubDate>
      <guid>https://trid.trb.org/View/1065587</guid>
    </item>
    <item>
      <title>BEHAVIOUR OF CONCRETE IN LIME-SOLUBLE CARBONIC ACID</title>
      <link>https://trid.trb.org/View/1061317</link>
      <description><![CDATA[LONG-PERIOD TESTS ARE CARRIED OUT TO DETERMINE WHETHER THE RESISTANCE OF DENSE CONCRETE TO ATTACK BY ACIDS, PARTICULARLY OF LIME SOLUBLE CARBONIC ACID CAN BE INCREASED BY USING CEMENTS CONTAINING A LITTLE LIME, OR USING LIMESTONE AS AGGREGATE.  FOR THIS PURPOSE, FINE CONCRETE PRISMS 4 X 4 X16 CM OF SEVERAL PORTLAND CEMENTS OF DIFFERENT COMPOSITION-AS WELL AS OF METALLURGICAL SAND AND TRASS-CONTAINING CEMENTS WERE PREPARED.  RHINE SAND AND LIMESTONE CHIPPINGS WERE USED AS AGGREGATE.  THE FINE CONCRETES CONTAINED 350 KG OF CEMENT PER SQUARE METRE, THE WATER/CEMENT VALUE WAS 0.50.  AFTER  28 DAYS CONDITIONING, THE PRISMS WERE EXPOSED TO ATTACK BY WATER CONSTANTLY SATURATED WITH CARBON DIOXIDE.]]></description>
      <pubDate>Sun, 21 Nov 2010 07:43:35 GMT</pubDate>
      <guid>https://trid.trb.org/View/1061317</guid>
    </item>
    <item>
      <title>CEMENT ANALYSIS BY MEANS OF ATOMIC ABSORPTION SPECTROMETRY</title>
      <link>https://trid.trb.org/View/1058219</link>
      <description><![CDATA[THE ATOMIC ABSORPTION SPECTROMETRY METHOD, AFTER A SOLUTION HAS BEEN OBTAINED WITH DILUTED HYDROCHLORIC ACID, CAN BE APPLIED TO THE ROUTINE CONTROL  OF SYNTHETIC AND SLAG PORTLAND CEMENT.  DETAILS ARE GIVEN OF THE ANALYTICAL METHODS OF STUDYING PARAMETERS.  EXAMPLES OF TEST PROCEDURES ARE ALSO GIVEN.  MEASUREMENTS ARE MADE AFTER ADEQUATE DILUTION BY COMPARISON WITH A  STANDARD CEMENT. THE REPRODUCIBILITY OF THE MEASUREMENTS IS EXAMINED BY CONSIDERING THE RESULTS OF APPROXIMATELY 100 ROUTINE ANALYSES.  MEAN VARIATION COEFFICIENTS ARE APPROXIMATELY 0,4% FOR ALL ELEMENTS EXCEPT ALUMINA FOR WHICH THE COEFFICIENT VALUE IS 1,1%.  THE ACCURACY OF THE RESULTS IS EVALUATED BY COMPARING THE LATTER TO THE MEAN VALUES OBTAINED DURING TESTS AT THE LCPC AND CERILH LABORATORIES. THIS METHOD IS PARTICULARLY SIMPLE TO APPLY, SHORTER THAN CONVENTIONAL METHODS AND OF A VERY LOW COST.  IT IS AT  THE ACCEPTANCE TEST LEVEL.]]></description>
      <pubDate>Sun, 21 Nov 2010 06:11:41 GMT</pubDate>
      <guid>https://trid.trb.org/View/1058219</guid>
    </item>
    <item>
      <title>SALT MOISTENING FACILITIES FOR AUTOMATIC CALCIUM CHLORIDE SPREADING EQUIPMENT AND PREPARATION EQUIPMENT FOR MIXING AND STORING THE BRINE</title>
      <link>https://trid.trb.org/View/1054012</link>
      <description><![CDATA[TO BE ABLE TO SPREAD MOIST SALT, NUMEROUS TECHNICAL IMPROVEMENTS TO THE AUTOMATIC EQUIPMENT ARE NECESSARY, OR ADDITIONAL EQUIPMENT, IN ORDER TO GET  THE CALCIUM CHLORIDE SOLUTION ON TO THE ROAD SURFACE.  EQUIPMENT FOR PREPARING CALCIUM CHLORIDE IN A BETTER FORM IS ALSO NECESSARY.  THE PROJECT COMPRISES: (1) EQUIPPING OF AUTOMATIC SPREADERS WITH SALT MOISTENING FACILITIES; (2) DEVELOPING BETTER CALCIUM CHLORIDE PROCESSING EQUIPMENT.]]></description>
      <pubDate>Sun, 21 Nov 2010 03:43:51 GMT</pubDate>
      <guid>https://trid.trb.org/View/1054012</guid>
    </item>
    <item>
      <title>THE PROBLEM OF DETERMINING THE CEMENT CONTENT OF MORTAR AND HARDENED CONCRETE</title>
      <link>https://trid.trb.org/View/1049632</link>
      <description><![CDATA[AN ATTEMPT IS MADE TO DEFINE THE FIELD AND CONDITIONS OF USE OF THE NELC 5.01-A METHOD FROM THE TEST PROCEDURE OF THE CENTRAL LABORATORY FOR CONSTRUCTION MATERIALS TESTS, WITH A VIEW TO DETERMINING THE PROPORTION OF CEMENT IN MORTAR AND HARDENED CONCRETE, IN RELATION TO THE NEW TYPES OF CEMENT SPECIFIED IN THE GENERAL SPECIFICATION FOR THE OFFICIAL APPROVAL OF CEMENTS (RC-75) WHICH CAME INTO FORCE RECENTLY.  THIS SPANISH STANDARD CORRESPONDS TO THE AMERICAN STANDARDS: ASTM C 85-54 AND 85-66.  ATTENTION IS DRAWN TO THE ERRORS THAT INADEQUATE APPLICATION OF THE METHOD COULD CAUSE.]]></description>
      <pubDate>Sun, 21 Nov 2010 01:19:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1049632</guid>
    </item>
    <item>
      <title>DURABILITY OF CONCRETE EXPOSED TO SEAWATER. STUDY OF TWO PORTLAND CEMENTS</title>
      <link>https://trid.trb.org/View/1049562</link>
      <description><![CDATA[AN ACCOUNT IS GIVEN OF THE BEHAVIOUR OF MORTARS (1:3) MADE WITH TWO SPANISH PORTLAND CEMENTS, WHOSE C3A CONTENT IS LESS THAN 8 AND 5, RESPECTIVELY,  EXPOSED TO SEAWATER.  THE DEVELOPMENT OF BENDING STRENGTH, CORROSION COEFFICIENTS (KOCH-STEINEGGAR), AS WELL AS THE VARIATION OF IONIC CONCENTRATION OF THE SOLUTIONS WHERE THE MORTAR TEST SAMPLES HAVE BEEN SUBMERGED IN FILTERED WATER OR IN SEAWATER FOR 56 DAYS ARE DETERMINED.  THE STRUCTURAL COMPOSITION OF THE SOLID PHASE FORMED AND THE HYDRATED CEMENT PASTE ARE ALSO DETERMINED.  A BIBLIOGRAPHY OF THE DURABILITY OF MORTARS AND CONCRETE EXPOSED TO SEAWATER IS INCLUDED.]]></description>
      <pubDate>Sun, 21 Nov 2010 01:18:01 GMT</pubDate>
      <guid>https://trid.trb.org/View/1049562</guid>
    </item>
    <item>
      <title>THE GEL DEPTH INDICATOR (IPG)</title>
      <link>https://trid.trb.org/View/1049367</link>
      <description><![CDATA[THIS APPARATUS ENABLES THE GEL DEPTH TO BE MEASURED IN SOILS, PAVEMENTS, SUBGRADES AND THE LIKE.  IN PRINCIPLE AN AQUEOUS SOLUTION OF FLUORESCEIN PRESENTS A YELLOW-GREEN COLOURATION IN THE LIQUID STATE, AND AN ORANGE COLOURATION IN THE SOLID STATE; THIS CHANGE OF COLOUR IS RELATED TO THE FLUORESCENT PROPERTIES OF THE SOLUTE; A SOLUTION OF 0.5 G OF FLUORESCEIN TO 1 LITRE OF WATER FREEZES AT ABOUT 0 DEG C AND THE CHANGE IN COLOUR IS SUFFICIENTLY DISTINCT TO ENABLE THE PHENOMENON TO BE OBSERVED.  THE COLOUR CONTRAST IS ACCENTUATED BY USING A POROUS MATRIX CONSISTING OF CRUSHED BLUE GLASS; THE COMBINATION OF COLOURS PRODUCES A DISTINCT CHANGE OF CONGELATION.  THE DESCRIPTION COVERS THE FOLLOWING: (1) PRINCIPLE OF OPERATION; (2) DESCRIPTION OF APPARATUS; (3) INSERTION OF THE OUTER TUBE; (4) PREPARATION AND INSERTION OF THE INNER TUBE; (5) APPLICATION; (6) COMMENTS.]]></description>
      <pubDate>Sun, 21 Nov 2010 01:11:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/1049367</guid>
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