REHABILITATION USING A DEEP COMPOSITE OVERLAY . 5TH CONFERENCE ON ASPHALT PAVEMENTS FOR SOUTHERN AFRICA (CAPSA 89). PROCEEDINGS HELD IN SWAZILAND, 5-9 JUNE, 1989

The paper uses a Case Study of a recent road construction project to describe a pavement widening and rehabilitation assignment which avoids the customary rip and recompact approach. The history of the 40 year old road is traced through numerous reseals and a previous widening which has resulted in a structure of varying material properties and a pavement of differing modes of distress and differing response. The factors leading to the chosen field investigation philosophy and in situ testing programme are discussed. The subsequent design philosophy leading to the actual widening and rehabilitation measures are described. The method chosen was to leave the existing structure undisturbed and to apply a subbase, base and asphalt overlay directly onto the black top prism without directly bonding the new and old pavement. The construction procedure is also described. The prism operation is followed by the full width overlay operation, all of which was constructed under traffic. To protect the crushed stone base from rain and traffic damage a temporary surfacing of slurry was applied directly to the base and followed a year later by a Cape seal.(A) For the covering abstract of the conference see IRRD 828827.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0620143959
• Corporate Authors:

  CAPSA

  PO BOX 993
  Manzini,   Swaziland 
• Authors:
  • Taylor, P F
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 75-79
• Serial:
  • Publication of: CAPSA
  • Publisher: CAPSA

Subject/Index Terms

• TRT Terms: Bitumen; Conferences; Construction management; Cracking; Crushed rock; Field tests; Grout; Pavement design; Pavement layers; Pavements; Rutting; Seal coats; Strength of materials; Structural strengthening; Subbase (Pavements); Surfacing; Test procedures
• Uncontrolled Terms: Subbase
• Geographic Terms: South Africa
• Subject Areas: Construction; Highways; Pavements;

Filing Info

• Accession Number: 00604025
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0-620-14395-9
• Files: ITRD, TRIS
• Created Date: Feb 28 1991 12:00AM