UNEVEN ASPHALT ROLLING FOUND IN MANY STATES

RECENT INVESTIGATION IN THE U.S.A. HAS SHOWN ROLLING PRACTICES WHICH RESULT IN LESS DENSITY AT THE EDGES OF ASPHALTIC PAVEMENTS THAN IN THE CENTRE, WHICH OFTEN GETS MORE ROLLING THAN IS NEEDED. A STUDY BY THE BUREAU OF PUBLIC ROADS OF FIELD CONDITIONS AND OPERATOR METHODS, SHOWED THAT JOBS WERE ORGANISED WITHOUT FOREKNOWLEDGE OF TEST- DESIGNATED ROLLER WEIGHTS, TYPES AND NUMBER OF PASSES. IT WAS FOUND THAT STEEL ROLLER OPERATORS FEARED THE BREAK- DOWN OR DISTORTION OF UNCONFINED EDGES, AND SO MADE FEWER PASSES. TESTS WHICH INVOLVED SPEEDS OF 20 TO 51 FT PER MINUTE SHOWED THAT PAVER SPEEDS SEEMED TO HAVE NO EFFECT ON COMPACTION RESULTS. /RRL/

• Supplemental Notes:
  • Vol108, No4, PP148-150, 2PP
• Publication Date: 1965-4

Media Info

• Serial:
  • Roads and Streets
  • Publisher: Donnelley (Reuben H) Corporation

Subject/Index Terms

• TRT Terms: Asphalt; Asphalt pavements; Bituminous mixtures; Compaction; Crash investigation; Density; Field studies; Pavers; Rollers; Rolling; Steel; Studies; Surfaces; Surfacing; Testing; Weight
• Uncontrolled Terms: Edges
• Geographic Terms: United States
• Old TRIS Terms: Field observation; Rolled; Roller coverage
• Subject Areas: Construction; Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00219248
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Aug 10 2004 4:58PM