THE EFFECT OF GOOD VIBRATION ON THE DURABILITY OF CONCRETE PAVEMENT

BECAUSE A NOTICEABLE DIFFERENCE IN DURABILITY OF CONCRETE PAVEMENTS IN COLORADO SEEMS TO BE ASSOCIATED WITH DIFFERENCES IN CONSOLIDATION AND VOID CONTENT OF THE CONCRETE, AN EFFORT HAS BEEN MADE TO DETERMINE THE RELATIONSHIP. TEST SECTIONS WERE LAID OUT ON TWO PAVEMENTS; ONE WAS COMPOSED OF A FINE-AGGREGATE MIX AND ONE WAS COMPOSED OF A COARSE-AGGREGATE MIX. THE PAVER USED WITH THE COARSE-AGGREGATE MIX WAS EQUIPPED WITH A SURFACE PAN VIBRATOR AND 2 INTERNAL VIBRATORS THAT COULD BE SPACED FOR ANY DESIRED SETTING. THE OTHER TEST SECTIONS HAD INTERNAL VIBRATION BY VIBRATORS HAVING ECCENTRICS WITH 4 DIFFERENT DIAMETERS AND 3 DIFFERENT VIBRATION SPEEDS. IN ADDITION, THE ANGLE OF THE VIBRATORS WAS CHANGED, AS WAS THE HEIGHT OF THE VIBRATOR FROM THE BASE OF THE SLAB. PAVER SPEEDS WERE ALSO VARIED FROM 10 TO 19 FT/MIN. AFTER HAVING BEEN IN PLACE FOR ONLY 4 MONTHS, LITTLE CAN BE SAID ABOUT DURABILITY OF THE CONCRETE, BUT MUCH HAS BEEN DETERMINED ABOUT CONSOLIDATION AND SEGREGATION OF THE PARTICLES. TO ACQUIRE GOOD CONSOLIDATION, 1-1/4-IN. SLUMP CONCRETE REQUIRED CONSIDERABLE VIBRATION. PROPER AMPLITUDE, FREQUENCY, AND SPACING OF VIBRATORS WILL PROVIDE UP TO 1000 PERCENT CONSOLIDATION OF CONCRETE PAVEMENTS WITHOUT SEGREGATION OF THE AGGREGATE. THE NUCLEAR DENSITY DEVICE IS A RELIABLE INDICATOR OF THE CONSOLIDATION OF FRESHLY POURED CONCRETE PAVEMENT AND, WHEN USED BY A CAPABLE OPERATOR, MAY BE USED TO CHECK AND CONTROL DENSITIES DURING CONSTRUCTION. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-23
  • Monograph Title: Quality assurance, concrete, construction, bridge deck coating, and joint seals
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00215455
  • Record Type: Publication
  • ISBN: 0309019702
  • Files: TRIS, TRB
  • Created Date: Mar 7 1972 12:00AM