USE OF TEXAS DYNAFLECT APPARATUS ON MINNESOTA TEST SECTIONS

THIS REPORT DESCRIBES A SERIES OF TESTS PERFORMED COOPERATIVELY ON FLEXIBLE PAVEMENTS IN MINNESOTA BY PERSONNEL OF THE MINNESOTA DEPARTMENT OF HIGHWAYS, UNIVERSITY OF MINNESOTA AND TEXAS TRANSPORTATION INSTITUTE. A MAJOR PORTION OF THE TESTS WAS CONDUCTED IN CONJUNCTION WITH NCHRP PROJECT 1-6, STANDARD MEASUREMENTS FOR SATELLITE PROGRAM-MEASUREMENT TEAM. MOST OF THE TEST SECTIONS INCLUDED IN THE STUDY ARE A PART OF MINNESOTAS HPR SATELLITE STUDY TITLED APPLICATION OF AASHO ROAD TEST FINDINGS TO DESIGN OF FLEXIBLE PAVEMENTS IN MINNESOTA. THE PRIMARY PURPOSE OF THE TESTS WAS TO /1/ DEVELOP CORRELATIONS BETWEEN DYNAFLECT READINGS, BENKELMAN BEAM DEFLECTIONS AND PLATE BEARING VALUES AND /2/ COMPARE PRESENT SERVICEABILITY RATINGS /PSRS/ ESTABLISHED BY A THREE-MAN PANEL WITH PRESENT SERVICEABILITY INDEXES /PSIS/ CALCULATED WITH READINGS OBTAINED BY THE CHLOE PROFILOMETER AND BPR-TYPE ROUGHOMETERS OF TEXAS AND MINNESOTA. COMPARATIVE DATA WERE ACQUIRED FROM TEN SELECTED 1200-FOOT LONG TEST SECTIONS. THESE SECTIONS WERE LOCATED ON TEN DIFFERENT HIGHWAY ROUTES HAVING A WIDE RANGE IN AGE, SOIL TYPE, PAVEMENT STRUCTURE AND PRESENT SERVICEABILITY. THE FOLLOWING MAJOR CONCLUSIONS ARE PRESENTED: /1/ DYNAFLECT READINGS, BENKELMAN BEAM DEFLECTIONS AND PLATE BEARING VALUES CORRELATE REASONABLY WELL WITH EACH OTHER. WHETHER ONE TEST METHOD IS BETTER THAN ANOTHER MUST AWAIT FURTHER STUDY BASED ON WHICH METHOD WILL MORE RELIABLY PREDICT PAVEMENT PERFORMANCE. /2/ EITHER THE CHLOE PROFILOMETER OR THE BPR-TYPE ROUGHOMETER CAN REASONABLY PREDICT A SERVICEABILITY RATING. /BPR/

  • Supplemental Notes:
    • Hpr-1/6/, STATE 183, BPR 16
  • Corporate Authors:

    Minnesota Department of Highways

    ,    

    University of Minnesota, Minneapolis

    Minneapolis, MN  USA  55455

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011
  • Publication Date: 1966

Subject/Index Terms

Filing Info

  • Accession Number: 00206292
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Jun 5 1994 12:00AM