FIELD COMPACTION CONTROL

FACTORS AFFECTING THE ASSESSMENT AND ACCEPTANCE OF FIELD COMPACTION ARE REVIEWED WITH PARTICULAR REFERENCE TO ERRORS IN MEASUREMENT AND SAMPLING. THE COMPACTION OF MATERIALS IN ROAD STRUCTURE IS PRIMARILY AIMED AT ENSURING THAT THE LAYER COMPLY WITH THE DESIGN REQUIREMENTS OF STRENGTH AND POROSITY. THE FOLLOWING TWO APPROACHES MAY BE FOLLOWED TO ENSURE THAT THESE CONDITIONS ARE SATISFIED: THE SO-CALLED METHOD AND END RESULT TYPES OF SPECIFICATIONS. THE END RESULT TYPE OF SPECIFICATION IS ALMOST EXCLUSIVELY USED, PARTICULARLY IN SOUTH AFRICAN ROAD PRACTICE. THE END CONDITION IS SPECIFIED AS A BULK DENSITY IN THE CASE OF BITUMINOUS MATERIAL AND AS A DRY DENSITY FOR THE OTHER ROAD CONSTRUCTION MATERIALS. SOME OF THE FACTORS ARE EXAMINED OF QUALITY CONTROL, WHICH ACTUALLY CONSISTS OF THE TWO SEPARATE FUNCTIONS OF PROCESS CONTROL AND ACCEPTANCE CONTROL. A COMBINATION OF THE METHOD AND END RESULTS METHOD IS USED TO SPECIFY THE FINAL DENSITY, THE FINAL MOISTURE CONTENT AND THE TIME THAT MUST ELAPSE BETWEEN THE APPLICATION OF THE BINDER AND FINAL COMPACTION. THE FACTORS IN A ROAD MATERIAL WHICH AFFECT THE ASSESSMENT OF COMPACTION ARE ITS STRENGTH AND VOIDS CONTENT. SINCE DENSITY IS RELATED TO BOTH THE STRENGTH AND THE VOID CONTENT OF A COMPACTED MATERIAL, THE DEGREE OF COMPACTION CAN USUALLY BE DETERMINED BY MONITORING THIS PARAMETER. TEST METHODS CURRENTLY IN USE FOR MEASURING THE DENSITY OF BITUMINOUS-BOUND, GRANULAR AND STABILIZED MATERIALS ARE REVIEWED. IT IS EMPHASIZED THAT MORE ATTENTION WILL HAVE TO BE GIVEN TO THE USE OF RAPID TEST METHODS SINCE STATISTICAL CONTROL DEMANDS THAT AN ADEQUATE NUMBER OF TEST RESULTS ARE NECESSARY FOR MEANINGFUL DECISIONS.

  • Supplemental Notes:
    • Csir Ref No RR 109, 9B/11 PP, 3 FIG, 4 TAB, 7 REF
  • Corporate Authors:

    Cncl Scient & Indus Res /S Africa

    /Nat Inst Road Res
    ,   USA 
  • Authors:
    • Kuhn, S H
    • Marais, C P
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00232840
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 6 1970 12:00AM