A STUDY OF SPECIFIC GRAVITY AS A CRITERION OF AGGREGATE QUALITY

AN ATTEMPT WAS MADE TO SELECT A SUITABLE GRAVITY-BASED MEASUREMENT FOR AGGREGATE INSPECTION, TO COMPARE THE ACCURACY OF PREDICTING QUALITY BY THE SELECTED MEASUREMENT VERSUS THAT BY THE PRESENT HIGHWAY DEPARTMENT PROCEDURE, AND IF THE GRAVITY METHOD WERE TO BE MORE SUCCESSFUL, TO SET UP SPECIFICATIONS AND TEST PROCEDURES BASED ON THE METHOD. IT WAS CONCLUDED THAT THE SPECIFIC GRAVITY METHOD COULD NOT BE ADOPTED TO FIELD INSPECTION AT THIS TIME. THE OBJECTIVE OF THE SECOND PART OF THE STUDY WAS TO DETERMINE THE DELETERIOUSNESS OF PARTICLES CLASSIFIED BY APPEARANCE, SPECIFIC GRAVITY AND SIZE AND TO FIND A MATHEMATICAL RELATIONSHIP BETWEEN DELETERIOUSNESS AND THE PERCENTAGE OF EACH CLASS. A MATHEMATICAL RELATIONSHIP WAS NOT DEFINITELY DETERMINED; HOWEVER, THE DATA COMPILED IS CONSIDERED TO BE OF BENEFIT IN DETERMINING SPECIFICATION LIMITS. /FHWA/

  • Corporate Authors:

    Michigan Department of State Highways

    State Highways Building, PO Drawer K
    Lansing, MI  USA  48904

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Carlson, D H
    • Hockings, W A
    • Volin, M E
  • Publication Date: 1971-5

Subject/Index Terms

Filing Info

  • Accession Number: 00217496
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jun 1 1971 12:00AM