USE OF PAVEMENT EVALUATION TECHNIQUES IN MAINTENANCE MANAGEMENT

PAVEMENT EVALUATION TECHNIQUES CONSIST OF UTILIZING THE PRESENT SERVICEABILITY INDEX (PSI) CONCEPTS AND PAVEMENT PERFORMANCE CURVE DEVELOPED DURING THE AASHO ROAD TEST AT OTTAWA, ILLINOIS. THE PSI IS A MEASURE OF PAVEMENT'S MOMENTARY ABILITY TO SERVE TRAFFIC. A PAVEMENT SERVICEABILITY RATING PANEL WAS APPOINTED TO MAKE A SUBJECTIVE JUDGEMENT OF THE ABILITY OF DIFFERENT PAVEMENT SECTIONS TO SERVICE TRAFFIC. PERSONNEL MEASURED VARIATIONS IN LONGITUDINAL AND TRANSVERSE PROFILES AS WELL AS THE AMOUNT OF CRACKING AND PATCHING ON EACH OF THE PAVEMENT SECTIONS. USING MATHEMATICAL ANALYSES, THESE QUANTITATIVE MEASURES WERE RELATED TO THE MEAN RATING VALUE AS ESTABLISHED BY THE RATING PANEL TO PRODUCE AN EQUATION TO PREDICT A QUANTITATIVE COUNTERPART OF THE MEAN RATING VALUE. DEVICES AVAILABLE TO MEASURE THE PAVEMENT PROFILE ARE: THE CHLOE PROFILOMETER AND THE ROUGHNESS INDICATOR. A VISUAL SURVEY IS MADE OF THE PAVEMENT SURFACE AND THE QUANTITIES OF PAVEMENT DEFICIENCES NOTED. WITH THE CRACKING AND PATCHING DATA IN HAND AND THE ROUGHNESS INDEX VALUES ESTABLISHED, THE PSI VALUES CAN BE COMPUTED FOR EACH PAVEMENT SECTION USING THE APPROPRIATE EQUATION WHERE THE CRACKING FACTOR IS IN UNITS OF LINEAR FEET OF CRACKING PER THOUSAND SQ. FEET OF AREA AND PATCHING FACTOR IS IN UNITS OF SQUARE FEET OF PATCHING PER THOUSAND SQ. FEET OF AREA. PSI VALUES CAN BE COMPUTED FOR EACH SEGMENT OF HIGHWAY AND PLOTTED ON A BAR CHART TO PERMIT INSPECTION AND ANALYSES. SERVICE LIFE CURVES ARE THE GRAPHIC ILLUSTRATION OF THE LOSS OF PSI VALUES AS A RESULT OF REPEATED AXLE-LOAD APPLICATIONS AND ENVIRONMENTAL INFLUENCES ACTING OVER A PERIOD OF TIME. WITH PAVEMENT SURFACE LIFE CURVES COMPUTED FOR EACH SIGNIFICANT CONTIGUOUS SEGMENT OF A ROADWAY SYSTEM IT IS POSSIBLE TO IDENTIFY THE YEAR IN WHICH EACH PAVEMENT SEGMENT CAN BE EXPECTED TO REACH ITS MINIMUM ACCEPTABLE PSI VALUE. RE- SURFACING PROGRAMS CAN BE SCHEDULED FROM THESE DATA.

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: pp 43-48
  • Monograph Title: Maintenance Management
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00206998
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Feb 10 1994 12:00AM