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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>
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    <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>ENGINEERING-GEOLOGICAL EVALUATION OF GRAVEL DEPOSITS</title>
      <link>https://trid.trb.org/View/121092</link>
      <description><![CDATA[A SYSTEMATIC APPROACH TO THE USE OF GEOPHYSICAL EXPLORATION IN PROSPECTING FOR GRAVEL DEPOSITS AND TO THEIR SUBSEQUENT EVALUATION IS SUGGESTED IN THIS PAPER. COMBINED APPLICATION OF GEOLOGICAL METHODS AND EARTH RESISTIVITY MEASUREMENTS IS EXEMPLIFIED BY A SURVEY OF A GRAVEL DEPOSIT IN NORTH-EAST ZEALAND, DENMARK. THIS SURVEY ILLUSTRATED BY TWO RESISTIVITY MAPS, THREE EXAMPLES OF DEPTH PROBINGS, AND AN OUTLINE MAP SHOWING RESULTS OF EXCAVATIONS. IT IS CONCLUDED THAT PETROGRAPHIC LABORATORY ANALYSES OF RANDOM SAMPLES FROM DEPOSITS OF AGGREGATE MATERIALS MAY PROVE TO BE OF LIMITED VALUE IF THEY ARE NOT SUPPLEMENTED WITH CAREFUL FIELD STUDIES AND MAPPING OF THE VARIATIONS IN LITHOLOGY, IN PARTICLE SIZE DISTRIBUTION ETC. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:38:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/121092</guid>
    </item>
    <item>
      <title>PORES IN CONCRETE SURFACES</title>
      <link>https://trid.trb.org/View/96065</link>
      <description><![CDATA[AN INVESTIGATION WAS CONDUCTED TO STUDY THE PORE-SEALING PROPERTIES OF THE FOLLOWING METHODS OF SURFACE TREATMENT: (1) COATING WITH ALKYD-BASED SEALING PAINT, (2) COATING WITH PLASTIC-BASED SEALING PAINT, (3) COATING WITH OIL-EMULSION PAINT, (4) SEALING WITH PLASTIC PUTTY AND COATING WITH ALKYD-BASED SEALING PAINT, (5) STOPPING WITH PUTTY, SCRATCHING, AND COATING WITH ALKYD-BASED SEALING PAINT, (6) FILLING WITH SAND PUTTY, RAKING, GRINDING, AND COATING WITH ALKYD-BASED PAINT, (7) FILLING WITH SAND PUTTY AND SPRAY-GUN PAINTING TO ORANGE-PEEL TEXTURE FORMING A THIN COATING, AND (8) FILLING WITH SAND PUTTY AND SPRAY-GUN PAINTING TO ORANGE-PEEL TEXTURE FORMING A THICK COATING. THE INVESTIGATION WAS MADE ON A NUMBER OF CONCRETE SLABS WHICH HAD BEEN SPECIALLY PREPARED SO THAT A GREAT NUMBER OF PORES WERE PRODUCED ON THEIR LATERAL SURFACES IN THE COURSE OF TESTING. THE NUMBER OF PORES AND THEIR EXTENT WERE RECORDED BY MEANS OF A SPECIAL MEASURING PROCEDURE WHICH HAD BEEN DEVELOPED. THE SURFACE TREATMENT WERE APPLIED TO THE LATERAL SURFACES OF THE SLABS AND THE PORE MEASUREMENTS REPEATED. A STATISTICAL ANALYSIS WAS MADE OF THE RESULTS OBTAINED FROM THESE MEASUREMENTS. THE PROBABILITY WAS CALCULATED OF COMPLETE PORE SEALING AND OF PORE SIZE REDUCTION. MEASUREMENTS FOR THE FIRST FOUR METHODS SHOW THAT THE SURFACE TREATMENT REDUCED THE SIZE OF EACH PORE BY A VALUE EQUAL TO THE MAXIMUM SIZE OF THE PORES WHICH WERE COMPLETELY SEALED BY THE SURFACE TREATMENT. EVALUATION OF RESULTS OBTAINED FROM THE LAST FOUR METHODS SHOWED THAT COMPLETE SEALING OF PORES WAS IN PART INDEPENDENT OF THE PORE SIZE. HOWEVER, THERE WERE CERTAIN DEFINITE PORE SIZES BELOW WHICH ALL PORES WERE SEALED WITH CERTAINTY. THE PROBABILITY OF COMPLETE PORE SEALING IS REPRESENTED IN FIGURES AS A FUNCTION  OF THE PORE SIZE.]]></description>
      <pubDate>Fri, 09 Dec 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/96065</guid>
    </item>
    <item>
      <title>DRYING SHRINKAGE OF PRECAST CONCRETE ELEMENTS</title>
      <link>https://trid.trb.org/View/101490</link>
      <description><![CDATA[AN EXPERIMENTAL INVESTIGATION WAS MADE OF THE DRYING SHRINKAGE OF CONCRETE, WHICH COMPRISED THREE TESTS; /1/ A LABORATORY TEST ON CONCRETE BEAMS MADE WITH VARIOUS TYPES OF CEMENT AND VARIOUS TYPES OF AGGREGATE, AND CURED UNDER VARIOUS CLIMATIC CONDITIONS; /2/ A TEST ON FACTORY-MADE PRECAST CONCRETE PANELS AND SLABS, WHOSE DRYING SHRINKAGE WAS RECORDED DURING ONE YEAR, AND /3/ A LABORATORY TEST CARRIED OUT IN ORDER TO STUDY THE EFFECT OF STEAM CURING ON THE DRYING SHRINKAGE OF CONCRETE BEAMS. THE MAIN CONCLUSION DRAWN FROM THIS INVESTIGATION WAS THAT THE DEVELOPMENT AND THE AMOUNT OF THE DRYING SHRINKAGE OF CONCRETE IS CONTROLLED MAINLY BY VARIATIONS IN THE HUMIDITY AND IN THE TEMPERATURE OF THE SURROUNDINGS. THUS, IN VIEW OF THE UNCERTAIN AND UNPREDICTABLE WEATHER CONDITIONS WHICH PREVAIL IN DENMARK, THE TOTAL DRYING SHRINKAGE MAY BE EXPECTED TO OCCUR, AFTER THE ASSEMBLY OF CONCRETE ELEMENTS, AT ANY TIME OF THE YEAR. /AUTHOR/]]></description>
      <pubDate>Tue, 12 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101490</guid>
    </item>
    <item>
      <title>WET SIZING OF AGGREGATES</title>
      <link>https://trid.trb.org/View/107030</link>
      <description><![CDATA[THE USUAL METHOD OF SCREENING AGGREGATES IN MOIST CONDITION IS UNSATISFACTORY IN MANY RESPECTS. IN PARTICULAR, THE SEPARATION OF FINE AGGREGATES INTO DIFFERENT SIZE FRACTIONS AND THE TOTAL REMOVAL OF DELETORIOUS FINE-GRAINED SUBSTANCES OFTEN CONSTITUTE THE NECESSARY CONDITIONS WHICH MUST BE FULFILLED IN ORDER TO OBTAIN A GOOD HOMOGENEOUS COMPOSITION OF THE AGGREGATES. WET SCREENING USED IN COMBINATION WITH HYDRAULIC METHODS OF SEPARATION AFFORDS A VALUABLE POSSIBILITY IN THIS CONNECTION. DURING THE CONSTRUCTION OF THE OSSAUSKOSKI HYDRO-ELECTRIC POWER STATION, SUCH METHODS OF SIZING AGGREGATES FOR CONCRETE WERE EMPLOYED FOR THE FIRST TIME IN FINLAND. IN SPITE OF SHORT DURATION OF THIS WORK, AND NOTWITHSTANDING THE ABSENCE OF PREVIOUS EXPERIENCE, THE USE OF THE WET SIZING METHOD BROUGHT ABOUT A SAVING IN CEMENT WHICH WAS GREAT ENOUGH TO COVER THE ADDITIONAL COSTS DUE TO THE APPLICATION OF THIS METHOD AS WELL AS THE COSTS OF PURCHASE AND ERECTION OF THE WET SIZING EQUIPMENT. THE RESULTS DEMONSTRATED THAT THE USE OF A HYDRAULIC METHOD OF SEPARATION CAN BE ECONOMICAL AND ADVANTAGEOUS FROM AN ENGINEERING POINT OF VIEW IN SEVERAL RESPECTS, EVEN IN NORTHERN REGIONS. /AUTHOR/]]></description>
      <pubDate>Tue, 12 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107030</guid>
    </item>
    <item>
      <title>THE CONTRACT BETWEEN CEMENT PASTE AND AGGREGATES AND ITS EFFECT ON RUPTURE PHENOMENA IN CONCRETE</title>
      <link>https://trid.trb.org/View/95472</link>
      <description><![CDATA[THE MOST IMPORTANT PASTE AND AGGREGATE PARAMETERS DETERMINING THE STRENGTH OF CONCRETE ARE THE STRENGTH OF THE PASTE, THE SIZE AND SHAPE OF THE AGGREGATES, THIER SURFACE TEXTURE, AND THEIR MODULUS OF ELASTICITY. THEORIES OF CONCRETE FAILURE ARE MENTIONED BRIEFLY, AND IT IS SUGGESTED THAT GRIGGITHS CRACK THEORY MAY EXPLAIN SEVERAL ASPECTS OF CONCRETE FAILURE. THE RESULTS OF AN EXPERIMENTAL INVESTIGATION OF RUPTURE PHENOMENA IN CONCRETE SUBJECTED TO TENSION ARE PRESENTED. SPLITTING TENSILE STRENGTHS ARE CORRELATED WITH THE NUMBER OF RUPTURED PARTICLES OF COARSE AGGREGATE IN THE FRACTURE PLANES OF THE SPLIT CYLINDERS. THE SIZE, SHAPE, AND MINERALOGICAL TYPE OF THE COARSE AGGREGATE, AS WELL AS THE STRENGTH OF THE MORTAR, WERE VARIED IN THE TESTS. A FORMULA BASED ON THE TEST RESULTS EXPRESSES THE TENSILE STRENGTH OF THE CONCRETE AS A FUNCTION OF THE RELEVANT VARIABLES. IT IS CONCLUDED THAT THE STRENGTH OF THE MORTAR IS THE MOST IMPORTANT PARAMETER DETERMINING THE TENSILE STRENGTH OF THE CONCRETE, PROVIDED THAT THE MODULUS OF ELASTICITY AND THE TENSILE STRENGTH OF THE COARSE AGGREGATE ARE GREATER THAN THOSE OF THE MORTAR MATRIX. /AUTHOR/]]></description>
      <pubDate>Wed, 27 Apr 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95472</guid>
    </item>
    <item>
      <title>THE EFFECT ON STRENGTH OF THE COMPOSITION OF CONCRETE</title>
      <link>https://trid.trb.org/View/101667</link>
      <description><![CDATA[THE TESTS DESCRIBED IN THIS PAPER INDICATE HOW THE STRENGTH OF CONCRETE IS INFLUENCED, NOT ONLY BY THE WATER- CEMENT RATIO, BUT ALSO BY OTHER FACTORS INVOLVED IN THE COMPOSITION OF CONCRETE, SUCH AS THE GRADING OF AGGREGATES, EXPRESSED BY THE PERCENTAGE OF FINE AGGREGATE AND THE MAXIMUM SIZE OF COARSE AGGREGATE, THE CEMENT CONTENT AND THE MODULUS OF ELASTICITY. THESE TESTS WERE MADE TO DETERMINE THE COMPRESSIVE STRENGTH OF CONCRETE AS WELL AS ITS MODULUS OF RUPTURE AND TENSILE STRENGTH. /RRL/]]></description>
      <pubDate>Fri, 18 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101667</guid>
    </item>
    <item>
      <title>UNCERTAINTY IN DETERMINATION OF CEMENT CONTENT AND MIX PROPORTIONS OF HARDENED CONCRETE</title>
      <link>https://trid.trb.org/View/101668</link>
      <description><![CDATA[THE DETERMINATION OF CEMENT CONTENT AND MIX PROPORTIONS OF HARDENED CONCRETE BY MEANS OF CHEMICAL ANALYSIS INVOLVES UNCERTAINTIES DUE TO THE FOLLOWING FACTORS.: (1) SOLUBLE AGGREGATES, (2) AN UNDETERMINED AMOUNT OF CHEMICALLY FIXED WATER CONTAINED IN THE CEMENT, AND (3) AN UNKNOWN COMPOSITION OF THE CEMENT USED IN THE CONCRETE. VALUES OF CORRECTION OF THE CEMENT CONTENT WHICH TAKE ACCOUNT OF VARIATIONS IN THE ABOVE-MENTIONED FACTORS HAVE BEEN COMPUTED FROM A MASS BALANCE OF THE CONSTITUENT MATERIALS. BY INTERPOLATING BETWEEN THE TABULATED VALUES IT IS POSSIBLE TO ESTIMATE THE MAXIMUM AND MINIMUM VALUES OF CEMENT CONVERT AND MIX PROPORTIONS. /RRL/]]></description>
      <pubDate>Fri, 18 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101668</guid>
    </item>
    <item>
      <title>CREEP AND SHRINKAGE OF CONCRETE UNDER VARYING EXTERNAL CONDITIONS</title>
      <link>https://trid.trb.org/View/101669</link>
      <description><![CDATA[THE EFFECTS OF DIFFERENT TYPES OF PERIODIC CHANGES IN STRESSES, IN MOISTURE CONDITIONS, AND IN TEMPERATURE CONDITIONS HAVE BEEN STUDIED IN A PILOT TEST SERIES. A FURTHER STUDY OF THE SPECIFIC EFFECT OF PERIODIC VARIATIONS IN STRESS SHOWED THAT A CHARACTERISTIC STRESS, APPLIED AS A CONSTANT STRESS, EQUALIZED THE VARYING STRESSES WITHIN REASONABLE LIMITS SO FAR AS THE DEVELOPMENT OF CREEP WAS CONCERNED. PERIODIC CHANGES IN MOISTURE CONDITIONS DURING THE FIRST MONTHS OF LOADING INFLUENCED THE CREEP, AS WELL AS THE SHRINKAGE. IT WAS FOUND THAT IMMERSION IN WATER FOR SHORT PERIODS OF TIME (6 HOURS PER PERIOD OF 7 DAYS) ALSO REDUCED THE LONG-TIME VALUES OF CREEP AND SHRINKAGE. /RRL/A/]]></description>
      <pubDate>Fri, 18 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101669</guid>
    </item>
    <item>
      <title>DEEP BEAMS. IV. BEAMS SUBJECTED TO LOADS ACTING ON BOTTOM FLANGES</title>
      <link>https://trid.trb.org/View/105440</link>
      <description><![CDATA[THE RESULTS OF TESTS ON 16 DEEP REINFORCED CONCRETE BEAMS WHICH WERE SUBJECTED TO LOADS ACTING ON THEIR BOTTOM FLANGES AND TESTED TO FAILURE ARE PRESENTED. /RRL/]]></description>
      <pubDate>Fri, 18 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/105440</guid>
    </item>
    <item>
      <title>DEEP BEAMS. V. SYNOPTIC CONSIDERATIONS ON DESIGN</title>
      <link>https://trid.trb.org/View/105441</link>
      <description><![CDATA[FUNDAMENTAL POINTS AND RULES CONCERNING THE DESIGN OF DEEP CONCRETE BEAMS ARE SUMMARIZED THROUGH REFERENCE TO PREVIOUS ARTICLES AND OTHER LITERATURE. A STRESS MODEL IS FORMULATED THAT CONSIDERS THE ARCH AND BOWSTRING GIRDER EFFECT OF THE DEEP BEAM IN THE CRACKED STAGE. /RRL/]]></description>
      <pubDate>Mon, 31 Jan 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/105441</guid>
    </item>
    <item>
      <title>DEEP BEAMS. I. EFFECTS PRODUCED ON STRESS DISTRIBUTION UNDER CONCENTRATED LOADS BY TRANSVERSE REINFORCEMENT DESIGNED TO PREVENT BURSTING</title>
      <link>https://trid.trb.org/View/105437</link>
      <description><![CDATA[THE RULES FOR THE DESIGN OF DEEP BEAM STRUCTURAL MEMBERS MADE OF REINFORCED CONCRETE ARE SOUGHT. PART I OF THE STUDIES DEALS WITH THE EFFECT PRODUCED ON THE STATE OF STRESS UNDER A CCNCENTRATED LOAD IN THE CRACKED STAGE BY THE TRANSVERSE REINFORCEMENT DESIGNED TO PREVENT THE DEVELOPMENT OF TENSILE CRACKS AT RIGHT ANGLES ON THE COMPRESSIVE FORCE. THIS REINFORCEMENT IS DESIGNATED BY THE TERM REINFORCEMENT AGAINST BURSTING, BY ANALOGY WITH THE REINFORCEMENT WHICH IS USED FOR A SIMILAR PURPOSE IN PRESTRESSED CONCRETE MEMBERS. /RRL/]]></description>
      <pubDate>Mon, 31 Jan 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/105437</guid>
    </item>
    <item>
      <title>DEEP BEAMS. II. MOMENT AND STRESS DISTRIBUTIONS IN CONTINUOUS DEEP BEAMS</title>
      <link>https://trid.trb.org/View/105438</link>
      <description><![CDATA[A DETERMINATION IS MADE OF HOW THE STATE OF STRESS IN THE CRACKED STAGE OF CONTINUOUS DEEP BEAMS CHANGES IN PRINCIPLE WHEN THE POSITION AND THE AMOUNT OF THE REINFORCEMENT AT THE SUPPORTS ARE VARIED IN RELATION TO THOSE OF THE REINFORCEMENT BETWEEN THE SUPPORTS. BEAMS ON SEVERAL (MORE THAN THREE) SUPPORTS AND BEAMS ON THREE SUPPORTS ARE CONSIDERED. ALL SPANS ARE ASSUMED TO BE EQUAL IN LENGTH. THE RATIO OF THE SPAN LENGTH TO THE DEPTH OF THE BEAM IS TAKEN TO BE EQUAL TO UNITY. THE LOADING CONSISTS OF CONCENTRATED LOADS WHICH ARE APPLIED AT THE OUTER QUARTER POINTS OF SPAN. INFORMATION ON THE BEHAVIOUR OF THE BEAMS IS ALSO PROVIDED FOR OTHER CONDITIONS OF LOADING, E.G. A UNIFORMLY DISTRIBUTED LOAD. /RRL/]]></description>
      <pubDate>Mon, 31 Jan 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/105438</guid>
    </item>
    <item>
      <title>DEEP BEAMS, III. STRENGTH AT SUPPORTS</title>
      <link>https://trid.trb.org/View/105439</link>
      <description><![CDATA[THE LOAD BEARING CAPACITY OF DEEP BEAMS OF REINFORCED CONCRETE IS GREATLY AFFECTED BY THE STRENGTH OF THE BEAM SUPPORTS. THE BEAM, OR WALL ACTING AS WEB, IS OFTEN CONNECTED TO A FLOOR SLAB. EXPERIMENTS ON THE EFFECT PRODUCED BY VARIATIONS IN THE THICKNESS OF THE FLANGE ON THE STRENGTH OF THE BEAM SUPPORTS ARE DESCRIBED. /RRL/]]></description>
      <pubDate>Mon, 31 Jan 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/105439</guid>
    </item>
    <item>
      <title>VARIATION OF CONCRETE STRENGTH IN CONCRETE COLUMNS</title>
      <link>https://trid.trb.org/View/140968</link>
      <description><![CDATA[This article describes the variation of strength in concrete columns in three different test series made by Niels Petersons, D. L. Bloen and Carl Forssell.  The results from all the tests show systematically high strength at the bottom.  Petersons' and Bloem's test series showed little strength at the top.  In the tests made by Forssell the strength at the top was not always low.  Low strength was observed at a short distance below the top. /TRRL/]]></description>
      <pubDate>Thu, 19 Sep 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/140968</guid>
    </item>
    <item>
      <title>SLAB BRIDGES SUPPORTED ON COLUMNS /MUSHROOM BRIDGES/</title>
      <link>https://trid.trb.org/View/98261</link>
      <description><![CDATA[A METHOD WAS PRESENTED FOR CALCULATING THE MOMENTS WHICH ACT ON FLAT SLABS SUBJECTED TO UNIFORMLY DISTRIBUTED LOADS AND TO CONCENTRATED LOADS. THE METHOD IN QUESTION IS BASED ON THE AVAILABLE TABLES OF MOMENTS IN SLABS. /RRL/]]></description>
      <pubDate>Wed, 31 Jul 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/98261</guid>
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