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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
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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>PRESSURES AT FOUNDATION SOIL INTERFACES UNDER LOADED CONCRETE AND SOIL-CEMENT HIGHWAY SLABS</title>
      <link>https://trid.trb.org/View/122166</link>
      <description><![CDATA[EXPERIMENTAL DATA ARE PRESENTED FOR SOIL PRESSURES MEASURED AT THE SUBBASE AND SUBGRADE INTERFACES UNDER CONCRETE AND SOIL-CEMENT TEST PANELS.  COMPARISONS ARE MADE BETWEEN EXPERIMENTAL DATA AND THEORETICAL PROCEDURES FOR COMPUTING PRESSURES.  THE FORMER WERE OBTAINED OVER A PERIOD OF SEVERAL YEARS AS SUPPLEMENTARY INFORMATION WHERE THE PRIMARY OBJECTIVE WAS THE ACCUMULATION OF LOAD-STRAIN AND LOAD-DEFLECTION RELATIONSHIPS USED TO EVALUATE AND DEVELOP DESIGN PROCEDURES FOR CONCRETE AND SOIL-CEMENT PAVEMENTS.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:42:21 GMT</pubDate>
      <guid>https://trid.trb.org/View/122166</guid>
    </item>
    <item>
      <title>SHEAR STRENGTH AND ELASTIC PROPERTIES OF SOIL-CEMENT MIXTURES UNDER TRIAXIAL LOADING</title>
      <link>https://trid.trb.org/View/122059</link>
      <description><![CDATA[TEST PROCEDURES WERE DEVELOPED TO DETERMINE THE SHEARING STRENGTH AND THE DEFORMATION OF THE SPECIMENS UNDER TRIAXIAL LOAD. THE ANALYSES OF TEST RESULTS SHOWED THAT THE COEFFICIENT OF INTERNAL FRICTION WAS RELATIVELY CONSTANT FOR CEMENT-TREATED SPECIMENS OF EACH SOIL REGARDLESS OF CEMENT CONTENT AND AGE. VALUES AVERAGED .96 FOR THE GRANULAR AND .73 FOR THE FINE GRAIN SOIL-CEMENT MIXTURES. COHESIVE STRENGTHS INCREASED WITH INCREASES IN CEMENT CONTENT AND AGE. TWENTYEIGHT DAY VALUES RANGED FROM ABOUT 35 TO 53 PSI.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:41:55 GMT</pubDate>
      <guid>https://trid.trb.org/View/122059</guid>
    </item>
    <item>
      <title>ENGINEERING PROPERTIES OF CORAL REEF MATERIALS</title>
      <link>https://trid.trb.org/View/120149</link>
      <description><![CDATA[TROPICAL CALCAREOUS EARTH MATERIALS DERIVED FROM CORAL REEFS MAY BE CLASSIFIED AS CORAL, LIMESTONE, AND CASCAJO. USING THIS CLASSIFICATION, THE ARTICLE SUGGESTS A BASIS FOR THE SYSTEMATIZATION OF KNOWLEDGE OF THE ENGINEERING PROPERTIES OF CORAL REEF MATERIALS. RESULTS OF TESTS ON A CASCAJO MATERIAL FROM GUAM SHOWED IT TO BE HIGHLY ADAPTABLE TO IMPROVEMENT BY THE ADDITION OF CEMENT. THREE PERCENT CEMENT MIXTURES HAD GOOD COMPRESSIVE STRENGTH AND HIGH RESISTANCE TO ALTERNATE WETTING AND DRYING.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:34:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/120149</guid>
    </item>
    <item>
      <title>REPORT OF COOPERATIVE SERIES OF TESTS ON ACCELERATORS</title>
      <link>https://trid.trb.org/View/95724</link>
      <description><![CDATA[IN TABLES INDICATING THE RELATIVE STRENGTHS OBTAINED AT THE DIFFERENT AGES FROM THE MIXTURES CONTAINING THE ACCELERATORS. IT IS CONCLUDED THAT THE BENEFICIAL EFFECTS OF THE ACCELERATORS ARE CONFINED TO THE EARLY AGES UNDER THE PRESCRIBED LABORATORY CONDITIONS OF CURING AND STORAGE. UNDER THESE CONDITIONS THE EFFECT OF THE CALCIUM CHLORIDE IS TO ACCELERATE THE HYDRATION OF THE CEMENT MARKEDLY DURING THE FIRST FEW DAYS, BUT THE RESULTING GAIN IN STRENGTH LARGELY DISAPPEARS AT THE 28-DAY PERIOD AND THEREAFTER. RELATIVE STRENGTH OF THE MORTARS CONTAINING THE ACCELERATORS AFTER THE 28-DAY PERIOD ARE SLIGHTLY HIGHER THAN THOSE OF THE CONCRETES AND OF THE PLAIN MORTARS FOR THE LATER PERIODS. DATA OBTAINED SUGGEST THAT THE ACCELERATION OF HARDENING IS PROBABLY DEPENDENT EITHER UPON THE PROPORTION OF CALCIUM CHLORIDE TO THE CEMENT, OR THE CONCENTRATION OF CALCIUM CHLORIDE IN THE GAGING LIQUID. CALCIUM CHLORIDE IS MORE EFFECTIVE UNDER DRY CURING THAN MOIST CURING.]]></description>
      <pubDate>Thu, 29 Jul 2004 17:33:23 GMT</pubDate>
      <guid>https://trid.trb.org/View/95724</guid>
    </item>
    <item>
      <title>TESTS USED BY THE BUREAU OF RECLAMATION FOR IDENTIFYING REACTIVE CONCRETE AGGREGATES</title>
      <link>https://trid.trb.org/View/101603</link>
      <description><![CDATA[A DELETERIOUS DEGREE OF ALKALI-REACTIVITY IS INDICATED IF THE AGGREGATES (1) ARE SHOWN TO CONTAIN PROPORTIONS OF REACTIVE SUBSTANCES IN EXCESS OF 0.25 TO 5.0 PERCENT BY WEIGHT, DEPENDING UPON THE IDENTITY OF THE REACTIVE CONSTITUENTS, (2) ARE CHARACTERIZED BY A RATIO OF SC/RC GREATER THAN 1.0 AS A RESULT OF THE CHEMICAL TEST, (3) CAUSE EXPANSION OF THE MOIST-STORED MORTAR SPECIMENS IN EXCESS OF 0.1 PERCENT LINEARLY IN A YEAR WITH THE HIGH ALKALI CEMENT, (4) CAUSE EXPANSION OF THE CONCRETE BEAMS IN EXCESS OF 0.07 PERCENT LINEARLY IN 310 CYCLES OF WETTING AND DRYING, OR (5) ARE KNOWN TO BE ASSOCIATED WITH THE CHARACTERISTIC EXPANSIVE DETERIORATION OF CONCRETE IN STRUCTURES. THE MORTAR-BAR EXPANSION TEST HAS FORMED THE MOST RELIABLE AND QUANTITATIVE MEANS OF EVALUATING ALKALI REACTIVITY OF AGGREGATES IN THE BUREAU OF RECLAMATION TESTING PROGRAM. THE BUREAU EXAMINATION INVOLVES THE FOLLOWING FIVE TESTS BEFORE AN AGGREGATE IS USED IN CONSTRUCTION: (1) PETROGRAPHIC ANALYSIS OF AGGREGATE, (2) CHEMICAL TESTING OF AGGREGATE, (3) MORTAR- BAR EXPANSION TEST, (4) CONCRETE WETTING AND DRYING AND (5) EXAMINATION OF CONCRETE IN STRUCTURES.]]></description>
      <pubDate>Fri, 15 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101603</guid>
    </item>
    <item>
      <title>METHODS FOR THE DETERMINATION OF SOFT PIECES IN AGGREGATE</title>
      <link>https://trid.trb.org/View/107063</link>
      <description><![CDATA[DESCRIPTIONS ARE GIVEN OF DIFFERENT METHODS FOR THE DETERMINATION OF SOFT PIECES IN AGGREGATES WITH TYPICAL TEST VALUES AND CONCLUSIONS BASED ON TEST DATA. TESTS MADE IN THE INVESTIGATION INCLUDED: VISUAL INSPECTION, SCRATCH HARDNESS, SPECIFIC GRAVITY AND ADSORPTION, RESISTANCE TO IMPACT, RESISTANCE TO ABRASION, RESISTANCE TO STATIC LOADS, AND SOUNDNESS.]]></description>
      <pubDate>Fri, 15 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107063</guid>
    </item>
    <item>
      <title>THE LOS ANGELES ABRASION MACHINE FOR DETERMINING THE QUALITY OF COARSE AGGREGATE</title>
      <link>https://trid.trb.org/View/107059</link>
      <description><![CDATA[DISSATISFACTION WITH THE STANDARD DEVAL ABRASION TEST FOR DETERMINING THE QUALITY OF COARSE AGGREGATE LED TO THE INVESTIGATION OF THE LOS ANGELES ABRASION TEST PROPOSED BY THE CALIFORNIA DIVISION OF HIGHWAYS. SEVERAL FEATURES OF THE TEST METHOD WERE CHANGED TO PROMOTE MORE UNIFORM RESULTS AND TO ADAPT THE METHOD TO THE TESTING OF MATERIALS USED IN LOW- COST ROAD CONSTRUCTION. AS NOW PRESENTED, THE METHOD IS BELIEVED SUITABLE FOR USE IN DETERMINING THE QUALITY OF PRACTICALLY ALL COARSE AGGREGATES USED IN ROAD CONSTRUCTION. SERVICE RECORDS FOR MATERIALS FROM 44 DIFFERENT SOURCES ARE COMPARED WITH THE RESULTS OF DEVAL AND LOS ANGELES ABRASION TESTS ON SAMPLES FROM EACH SOURCE. A DEFINITE AGREEMENT SEEMS TO EXIST BETWEEN THE RESULTS OF THE LOS ANGELES TEST AND THE SERVICE RECORD. THE RESULTS OF THE DEVAL TEST SHOW NO AGREEMENT WITH THE SERVICE RECORD, AND IN A NUMBER OF CASES INDICATE MATERIAL TO BE SATISFACTORY QUALITY WHILE THE SERVICE RECORD FINDS THE MATERIAL TO BE QUESTIONABLE OR UNSUITABLE FOR USE. BASED ON THE TESTS REPORTED, THE AUTHORS FIND THE LOS ANGELES ABRASION TEST TO BE BETTER SUITED FOR DETERMINING THE QUALITY OF COARSE AGGREGATE THAN THE STANDARD DEVAL ABRASION TEST. A PERCENTAGE OF WEAR OF 40 IN THE LOS ANGELES TEST IS SUGGESTED AS A SUITABLE SPECIFICATION LIMIT FOR AGGREGATE FOR USE IN SURFACE TREATMENT WORK. /AUTHOR/]]></description>
      <pubDate>Fri, 08 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107059</guid>
    </item>
    <item>
      <title>DIGEST OF TESTS IN THE UNITED STATES FOR THE DETERMINATION OF THE MODULUS OF ELASTICITY OF PORTLAND CEMENT MORTAR AND CONCRETE</title>
      <link>https://trid.trb.org/View/95695</link>
      <description><![CDATA[A REVIEW IS PRESENTED OF TESTS DEVELOPED BETWEEN 1895 AND 1899 FOR THE DETERMINATION OF THE MODULUS OF ELASTICITY OF PORTLAND CEMENT MORTAR AND CONCRETE. THIS REVIEW IS FOLLOWED BY YEARLY REVIEWS FROM 1905 THROUGH 1929. COMPRESSION TEST RESULTS ON CONCRETE HAVING TO DO WITH THE EFFECT UPON THE MODULUS OF ELASTICITY OF AGE, RICHNESS OF MIX, REPEATED LOADS, SUSTAINED LOADS AND MOISTURE CONDITIONS ARE PRESENTED. IT IS SHOWN THAT THE MODULUS OF ELASTICITY, UNDER THE CONDITIONS OF THESE TESTS, INCREASES WITH AGE FOR A CONSIDERABLE PERIOD OF TIME. THE INCREASE IN THE MODULUS OF ELASTICITY IS RAPID AT THE EARLY AGES AND ITS RATE DECREASES QUITE UNIFORMLY WITH TIME. AT THE LATER AGES THE MODULI FOR RICH MIXES CONTINUES SUBSTANTIALLY TO INCREASE AFTER THE MODULI FOR THE LEAN MIXES HAVE BECOME PRACTICALLY CONSTANT. THE RICHER THE MIX, OTHER THINGS REMAINING CONSTANT, THE HIGHER THE MODULUS OF ELASTICITY. THE MODULUS OF ELASTICITY OF A GIVEN CONCRETE WHEN THE PORE SPACES ARE FILLED WITH WATER, IS MATERIALLY GREATER THAN FOR THE SAME CONCRETE WHEN AIR DRY. WHILE THE EFFECT OF FREE MOISTURE WITHIN THE MASS IS TO DECREASE THE COMPRESSIVE STRENGTH, THE MODULUS OF ELASTICITY IS THEREBY INCREASED. THE SUSTAINED MODULUS AFTER A PROLONGED PERIOD OF SUSTAINED STRESS IS BUT A FRACTION OF THE INSTANTANEOUS MODULUS AND THIS FRACTION IS GREATER FOR HIGH STRESSES THAN FOR LOW ONES. THE SUSTAINED MODULUS OF ELASTICITY IS SUBSTANTIALLY HIGHER FOR A WET CONCRETE THAN FOR THE SAME CONCRETE WHEN AIR DRIED. THE EFFECT OF A LOAD APPLIED AT AN EARLIER AGE IS TO INCREASE THE MODULUS OF ELASTICITY WHEN THE SAME LOAD IS APPLIED AT A LATER AGE.]]></description>
      <pubDate>Fri, 08 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95695</guid>
    </item>
    <item>
      <title>DRYING SHRINKAGE OF CONCRETE AS AFFECTED BY MANY FACTORS</title>
      <link>https://trid.trb.org/View/95702</link>
      <description><![CDATA[AMONG THE RESULTS PRESENTED, IT IS SHOWN THAT FOR A COMMON GLACIAL GRAVEL AND A STANDARD CEMENT, NEITHER CEMENT CONTENT, NOR GRADATION OF AGGREGATE, NOR DURATION OF PRELIMINARY MOIST CURING HAS MUCH EFFECT ON SHRINKAGE. IT IS INDICATED THAT INVISIBLE CRACKING OF MORTAR BETWEEN AGGREGATE PARTICLES IS COMMON IN CONCRETE SUBJECTED TO DRYING. DIFFERENCES IN EXTENT OF CRACKING OFTEN MAY BE THE DISTINGUISHING FEATURE BETWEEN CONCRETES OF HIGH AND LOW SHRINKAGE. TO TEST THIS HYPOTHESIS, ATTEMPTS WERE MADE TO REDUCE THE TENSILE STRENGTH OF THE MOTAR IN CONCRETE. SMALL AMOUNTS OF GROUND MICA WERE ADDED TO CONCRETE MIXES. SUBSTANTIAL REDUCTIONS IN SHRINKAGE WERE OBTAINED. TYPE OF AGGREGATE IS SHOWN TO HAVE A LARGE EFFECT ON CONCRETE SHRINKAGE. AMONG THE PURE-MINERAL AGGREGATES, DENSE GRADES OF QUARTZ, FELDSPAR, DOLOMITE, AND LIMESTONE ARE OUTSTANDING IN PRODUCING LOW SHRINKAGE. HORNBLENDE AND PYROXENE, WHICH ARE FERROMAGNESIUM SILICATES, PRODUCE CONCRETE OF HIGH SHRINKAGE. AMONG THE AGGREGATES OF MIXED COMPOSITION, SLATE AND SANDSTONE PRODUCE CONCRETE OF VERY HIGH SHRINKAGE. GRANITE FALLS INTERMEDIATE BETWEEN AGGREGATES PRODUCING HIGH AND LOW SHRINKAGE IN ACCORDANCE WITH ITS VARIED CONSTITUENTS. FROM INCOMPLETE STUDIES TO DATE, IT APPEARS THAT THE RIGIDITY, OR MODULUS OF ELASTICITY, OF THE AGGREGATE LARGELY DETERMINES WHETHER OR NOT IT WILL PRODUCE CONCRETE OF HIGH OR LOW SHRINKAGE. /AUTHOR/]]></description>
      <pubDate>Fri, 08 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95702</guid>
    </item>
    <item>
      <title>MEASURING CHANGES IN PHYSICAL PROPERTIES OF CONCRETE BY THE DYNAMIC METHOD</title>
      <link>https://trid.trb.org/View/95706</link>
      <description><![CDATA[A REPORT IS GIVEN ON FREEZING AND THAWING TESTS PERFORMED ON CONCRETE COMPOSED OF VARIOUS AGGREGATES WITH DIFFERENT WATER-CEMENT RATIOS IN WHICH THE DETERIORATION IS DETERMINED BY USING THE DYNAMIC METHOD TO MEASURE CHANGE IN THE MODULUS OF ELASTICITY.]]></description>
      <pubDate>Sat, 18 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95706</guid>
    </item>
    <item>
      <title>MODULUS OF ELASTICITY OF CONCRETE</title>
      <link>https://trid.trb.org/View/95691</link>
      <description><![CDATA[A SUMMARY IS GIVEN OF COMPRESSION TESTS CONDUCTED ON APPROXIMATELY 3,500 6 X 12 INCH CYLINDERS. THE RELATION BETWEEN THE MODULUS OF ELASTICITY AND STRENGTH OF CONCRETE IS STUDIED FOR THE FOLLOWING VARIABLES: SIZE AND GRADING OF AGGREGATE, KIND OF AGGREGATE, QUANTITY OF CEMENT, CONSISTENCY OF CONCRETE, AGE AT TEST, TIME OF MIXING, AND CURING CONDITIONS OF CONCRETE. THE TESTS SHOW THAT THE MODULUS OF ELASTICITY IS AFFECTED BY THESE VARIABLES IN A MANNER SIMILAR TO THE STRENGTH.]]></description>
      <pubDate>Sat, 18 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95691</guid>
    </item>
    <item>
      <title>THE EFFECT OF FINE AGGREGATE ON THE DURABILITY OF MORTARS</title>
      <link>https://trid.trb.org/View/107060</link>
      <description><![CDATA[A COMPARISON IS MADE OF DATA FROM LABORATORY DURABILITY TESTS OF FINE AGGREGATES AND MORTARS MADE THEREFROM AND DATA FROM NATURAL WEATHERING OF THE MORTARS. EIGHTEEN FINE AGGREGATES WERE SUBJECTED TO SODIUM AND MAGNESIUM SULFATE TESTS AND TO AN ACCELERATED FREEZING-THAWING TEST. A FAST AND SLOW LABORATORY FREEZING-THAWING TEST WAS USED FOR THE MORTAR SPECIMENS, WHICH WERE ALSO PLACED OUTSIDE IN ONE INCH OF WATER.]]></description>
      <pubDate>Sat, 18 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107060</guid>
    </item>
    <item>
      <title>A COMPARISON OF RESULTS OF SIEVING PROCEDURES IN SOUNDNESS TESTS ON MAINE SANDS</title>
      <link>https://trid.trb.org/View/107061</link>
      <description><![CDATA[A SERIES OF TESTS TO INVESTIGATE THE EFFECT OF THE MAGNESIUM SULFATE SOUNDNESS TEST ON MAINE SANDS WERE PERFORMED BY BOTH PROCEDURES SPECIFIED IN THE A.S.T.M. TENTATIVE METHOD OF TEST FOR SOUNDNESS OF AGGREGATES BY USE OF SODIUM SULFATE OR MAGNESIUM SULFATE (C88-41-T). SIXTY- FOUR SAND SPECIMENS FROM THIRTY-TWO SOURCES WELL DISTRIBUTED GEOGRAPHICALLY OVER THE STATE OF MAINE WERE USED. A HIGH CORRELATION BETWEEN THE TWO PROCEDURES IS SHOWN.]]></description>
      <pubDate>Sat, 18 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/107061</guid>
    </item>
    <item>
      <title>CORRELATION OF LABORATORY TESTS WITH FIELD EXPERIENCES OF EXCESSIVE CONCRETE EXPANSION INDUCED BY A REACTION BETWEEN THE CEMENT AND AGGREGATE</title>
      <link>https://trid.trb.org/View/101604</link>
      <description><![CDATA[THE HISTORY OF THE IDENTIFICATION OF ALKALI-AGGREGATE REACTION IN CALIFORNIA FROM THE TIME DISTRESS WAS NOTED IN A PAVEMENT NORTH OF BRADLEY IN THE SALINAS VALLEY IN 1938 AND THE EARLIER FAILURE OF THE KING CITY BRIDGE, BUILT IN 1919- 1920, IN JULY 1924 TO THE DEVELOPMENT OF THE SEALED CONTAINER TEST IN WHICH EXPANSION IS OBSERVED IN A MORTAR BAR STANDING OVER WATER WHILE THE TEMPERATURE IS MAINTAINED AT 100 DEGREES F. THE RESULTS SHOW THAT THE OPALINE SILICA CONTAINED IN THE SALINAS RIVER SAND REACTS WITH CEMENTS CONTAINING MORE THAN 0.6 PERCENT EQUIVALENT SODIUM OXIDE TO FORM A SODIUM SILICATE GEL WHICH CAUSES THE EXCESSIVE EXPANSION. THE LABORATORY TEST CHECKED CONSISTENTLY WITH EXPERIENCE WITH STRUCTURES.]]></description>
      <pubDate>Sat, 18 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/101604</guid>
    </item>
    <item>
      <title>DISCUSSION ON CALCIUM CHLORIDE IN CONCRETE</title>
      <link>https://trid.trb.org/View/98202</link>
      <description><![CDATA[THE USE OF CALCIUM CHLORIDE AS AN ACCELERATOR IN THE HARDENING OF CONCRETE IS DISCUSSED. AN INVESTIGATION IS REPORTED CONCERNING THE ACTION OF CALCIUM CHLORIDE ON SEVERAL DIFFERENT BRANDS OF CEMENT. THE EFFECTS OF CALCIUM CHLORIDE UNDER DIFFERENT TEMPERATURE CONDITIONS WERE TESTED BY EXPOSING 2-IN. MORTAR CUBES TO NORMAL INDOOR TEMPERATURES, WHILE OTHERS WERE STORED OUTDOORS. THE INCREASE IN STRENGTH OF OUT-DOOR SPECIMENS CONTAINING CALCIUM CHLORIDE OVER THE PLAIN SPECIMENS UNDER THE SAME STORAGE INDICATED THE EFFICIENCY OF THIS PRODUCT UNDER SUCH CONDITIONS. THE PRACTICAL APPLICATION OF THE USE OF CALCIUM CHLORIDE AS AN ACCELERATOR IS ILLUSTRATED IN THE CONCRETE ROADWAY PLACED AT SEVERAL BRIDGE APPROACHES OVER WHICH TRAFFIC WAS ADMITTED SEVEN DAYS AFTER THE ROADWAY WAS PLACED. THE CONCRETE CONTAINING CALCIUM CHLORIDE SHOWS A LOWER STRENGTH AT THE SIX-MONTHS PERIOD THAN THE PLAIN CONCRETE, BUT THE LOWEST STRENGTH ON THE CALCIUM CHLORIDE CONCRETE IS IN EXCESS OF 3000 LB. PER SQ. IN. WHICH IS CONSIDERED A SAFE VALUE FOR ANY STRUCTURE. THE CONCRETE WITH A 2-PER-CENT SOLUTION OF CALCIUM CHLORIDE SHOWED HIGHER COMPRESSIVE STRENGTH THAN THE CONCRETE WITH A 4-PER-CENT SOLUTION. THE CONCRETE SLABS WERE REINFORCED WITH COLD-DRAWN WIRE MESH, AND AN EXAMINATION OF THE STEEL SHOWED NO DETRIMENTAL ACTION OF THE CALCIUM CHLORIDE.]]></description>
      <pubDate>Fri, 10 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/98202</guid>
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