COMPACTION OF HIGHWAY SOILS UNDER ARGENTINAS NEW SPECIFICATIONS

A BRIEF ACCOUNT IS PRESENTED OF THE RECENT HISTORY AND CURRENT REQUIREMENTS OF THE ARGENTINE SPECIFICATIONS FOR COMPACTING HIGHWAY SOILS, FOLLOWED BY A DISCUSSION OF THE FIELD EQUIPMENT APPROPRIATE FOR ACHIEVING THE DENSITIES SPECIFIED. A STUDY WAS MADE OF THE LABORATORY COMPACTION DATA PUBLISHED FOR SOME FIFTY SOILS TO ESTABLISH A CORRELATION BETWEEN THE NEW SPECIFICATION AND THE ONE IT REPLACED. FROM THESE DATA IT WAS DETERMINED THAT THE MAXIMUM DENSITIES OBTAINED BY THE AASHO T180 METHOD WERE FROM ZERO TO FIFTEEN PERCENT GREATER THAN THOSE OBTAINED BY THE PREVIOUSLY USED LABORATORY STANDARD. ON THE BASIS OF THIS INFORMATION IT WAS THEN CALCULATED THAT FOR SOILS IN THE PAVEMENT STRUCTURE OF SUBGRADE FILL, THE INCREASE IN DENSITY REQUIREMENTS AS A RESULT OF THE CHANGE IN COMPACTION SPECIFICATIONS VARIES FROM ZERO TO TWELVE PERCENT, DEPENDING UPON SOIL TYPE. PUBLISHED RESULTS OF FULL-SCALE TESTS OF COMPACTION EQUIPMENT PROVIDED DATA FOR DETERMINING WHICH COMPACTORS ARE APPROPRIATE FOR OBTAINING THE DENSITIES REQUIRED BY THE NEW SPECIFICATIONS. THE FIELD TESTS SHOW THAT FINE-GRAINED SOILS MAY BE COMPACTED TO HIGH DENSITIES BY MEANS OF SHEEPSFOOT ROLLERS WITH TAMPING FEET OF LARGE AREA, AND BY PNEUMATIC-TIRED ROLLERS WITH HIGH INFLATION PRESSURES OF ABOUT 150 PSI. GRANULAR SOILS MAY BE COMPACTED TO VERY HIGH DENSITIES BY MEANS OF VIBRATING DRUM ROLLERS, VIBRATING BASE-PLATE COMPACTORS AND VIBRATING PNEUMATIC- TIRED ROLLERS WITH HIGH INFLATION PRESSURES.

  • Supplemental Notes:
    • 22 Pp, 6 FiG, 4 TAB, 9 REFS
  • Corporate Authors:

    North Carolina State University, Raleigh

    Raleigh, NC  United States  27695
  • Authors:
    • Parsonson, P S
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00231164
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:23AM