SKID RESISTANCE OF POLISHED AGGREGATES, FIELD AND LABORATORY INVESTIGATION

EXPERIMENTAL SURFACE TREATMENTS USING 11 DIFFERENT AGGREGATES AND AGGREGATE COMBINATIONS HAD BEEN PLACED ON ROUTE 26 BETWEEN STATE COLLEGE AND BELLEFONTE AND WERE MONITORED FOR SKID RESISTANCE FROM 1965 TO 1969. CHANGES IN TRAFFIC VOLUME AND TYPE, AS WELL AS OTHER UNCONTROLLED VARIABLES, MAKE IT DIFFICULT TO DIFFERENTIATE THE PERFORMANCE OF SIMILAR AGGREGATES AND OBTAIN CORRELATIONS WITH LABORATORY POLISHING DATA. NEVERTHELESS, NO SERIOUS INCONSISTENCIES WERE FOUND. SUGGESTIONS FOR IMPROVED PROCEDURES ARE MADE. UNCRUSHED GRAVEL SHOWED THE SMALLEST CHANGE IN FRICTION WITH TIME, ALTHOUGH THE AUTHOR WARNS AGAINST GENERALIZING THIS FINDING BECAUSE OF THE UNKNOWN COMPOSITION OF THIS HETEROGENEOUS AGGREGATE. COARSER GRADATIONS WERE FOUND TO BE BENEFICIAL BECAUSE OF BETTER CONTINUED AGGREGATE EXPOSURE IN THE CASE OF THE SURFACE TREATMENT USED. /AUTHOR/

• Corporate Authors:

  Pennsylvania State University, University Park

  Pennsylvania Transportation Institute, Transportation Research Building
  University Park, PA  United States  16802

  Pennsylvania Department of Highways

  400 North Street
  Harrisburg, PA  United States  17120-0095

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Hegmon, R R
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Bituminous aggregates; Coarse aggregates; Friction; Gravel; Polished aggregates; Skid resistance; Surface treating; Traffic volume
• Subject Areas: Geotechnology; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00206408
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Report/Paper Numbers: No 67-11
• Files: TRIS
• Created Date: Jul 14 1970 12:00AM