DEVELOPMENT OF A LABORATORY METHOD OF PREDICTING WEAR RESISTANCE OF AGGREGATES

A laboratory polishing and measuring system has been developed which can be used to predict the degree to which aggregates can be expected to polish under pneumatic tired traffic. Standard sized pneumatic tires are used to polish laboratory specimens. Results are quantified by calculating the asymptote approached by an hyperbolic curve fitted to data reflecting frictional resistance versus polishing effort. Aggregates are rated against the performance of a control aggregate polished concurrently with the candidates. Usual quality test data and petrographic classifications are included in the data identifying the aggregates tested. In addition to thirty-three local sources, three from the ASTM list of standard aggregates has been examined and rated. /FHWA/

• Corporate Authors:

  Maryland Department of Transportation

  State Highway Administration, 707 N Calvert Street
  Baltimore, MD  United States  21202
• Authors:
  • Smith Jr, N L
  • Morawski, E J
• Publication Date: 1977-3

Media Info

• Pagination: 40 p.

Subject/Index Terms

• TRT Terms: Aggregates; Durability; Forecasting; Friction; Laboratory studies; Measurement; Pneumatic equipment; Polished aggregates; Testing; Tires; Traffic
• Old TRIS Terms: Pneumatic tire
• Subject Areas: Geotechnology; Highways; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00165745
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA-MD-R-77-1 Final Rpt.
• Contract Numbers: AWO76-095-046
• Files: TRIS, USDOT, STATEDOT
• Created Date: Mar 7 1978 12:00AM