A NEW LOOK FOR JOHANNESBURG'S EASTERN BYPASS

The article describes construction methods used in widening a 10.5km section of the South African national route N3-12 while it remained open for use. Additional fast lanes 3.7M wide were added to north and southbound carriageways along the existing median. The complex geology along the route comprised quartzites, conglomerates, shales and siltstone as well as residual granites and soft granite rocks. Pavement designs used in the construction are detailed. Areas of old cracked pavement required complete reconstruction requiring excavation of the original concrete slabs while other distressed areas were sealed and a 40mm surfacing layer laid. Sub-surface and concrete-lined drains and other hydraulic structures were installed where they were not originally provided. Embankment erosion was controlled by the laying of Kikuyu grass. (Author/TRRL)

• Corporate Authors:

  Pithead Press (Proprietary) Limited

  P.O. Box 9002
  Johannesburg 2000,   South Africa 
• Authors:
  • Fitzsimons, John M
• Publication Date: 1982-6

Media Info

• Features: Photos;
• Pagination: p. 74
• Serial:
  • Construction in Southern Africa
  • Volume: 27
  • Issue Number: 3
  • Publisher: Pithead Press Proprietary Limited

Subject/Index Terms

• TRT Terms: Bituminous mixtures; Construction; Construction management; Cracking; Erosion control; Highways; Pavement design; Pavement widening; Pavements; Reconstruction; Repairing; Rigid pavements; Strength of materials; Structural strengthening
• Geographic Terms: South Africa
• Old TRIS Terms: Construction problems; Widening pavement
• ITRD Terms: 4967: Bituminous mixture; 3666: Construction method; 5211: Cracking; 2755: Highway; 3635: Repair; 2964: Rigid pavement; 8103: South Africa; 3096: Strengthening (pavement); 2889: Widening (road, bridge)
• Subject Areas: Construction; Highways; Maintenance and Preservation; Pavements; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00368734
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jan 31 1983 12:00AM