INVESTIGATION OF "D" CRACKING IN PCC PAVEMENTS: LABORATORY PHASE 1

THE PHYSICAL PROPERTIES OF SEVERAL COARSE AGGREGATES, CHOSEN ON THE BASIS OF THEIR AVERAGE BULK SPECIFIC GRAVITIES FROM WITHIN THE BETHANY FALLS LIMESTONE STRATUM, WERE FOUND TO CORRELATE WITH THE DURABILITY RESULTS OF THE LOABORATORY CONCRETE FREEZE AND THAW TEST. HOWEVER, THE RESULTS WERE FOUND TO BE MORE SIGNIFICANT IF THE INTERNAL GRAVITY GRADATION OF EACH AGGREGATES WAS CONSIDERED. THE RESISTANCE OF A CONCRETE TO FREEZE AND THAW WAS FOUND TO VARY DIRECTLY WITH THE BULK SPECIFIC GRAVITY, BULK SPECIFIC GRAVITY (SATURATED SURFACE DRY). AND BULK SPECIFIC GRAVITY ( VACUUM SATURATED SURFACE DRY). THE RESISTANCE ALSO VARIES INDIRECTLY WITH THE ABSORPTION OF THE COARSE AGGREGATE USED. COARSE AGGREGATES WITH A BULK SPECIFIC GRAVITY (SATURATED SURFACE DRY) OF 2.65 OR LESS WERE FOUND TO CONTRIBUTE SIGNIFICANTLY TO A DECREASE IN THE RESISTANCE OF THE CONCRETE TO FREEZE AND THAW. OTHER VARIABLES CONSIDERED WERE SAND CONTENTS, AIR CONTENTS, MAXIMUM SIZE OF COARSE AGGREGATES USED, SPECIFIC BLENDS OF HIGH AND LOW GRAVITY COARSE AGGREGATES, AND GEORGRAPHIC LOCATION OF THE SURCES FROM WHICH THE AGGREGATES WERE OBTAINED. /AUTHOR/

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Filing Info

  • Accession Number: 00214007
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 25 1971 12:00AM