SOME ASPECTS OF CONCRETE PAVEMENTS FOR NATIONAL ROADS IN SOUTH AFRICA

Concrete pavements in South Africa are mainly confined to heavy duty roads. Generally they are constructed as plain undowelled, short joint spaced pavements on a cement treated crushed stone subbase. Details of specific contracts are given. Construction problems encountered include cracking in cement stabilised subbase layers and inconsistency in workability of the mixed concrete; measures to deal with these are described. Other problems discussed include use of the slip form paver and the side form paver, shrinkage cracking due to delayed joint cutting. Protection of the pavement against wind, sun and rain is essential. Post construction problems include alkali-aggregate reaction. Experimental overlays using asphalt, crushed stone and portland cement have been constructed for rehabilitation. Other topics discussed in terms of practice in South Africa include slide resistance, riding quality, use of dowels in concrete pavements, joint seals, drainage, concrete slab thickness and structural performance. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03799824
• Corporate Authors:

  Concrete Society of Southern Africa

  Portland Park, P.O. Box 168
  Halfway House,   South Africa 
• Authors:
  • Mitchell, M F
• Publication Date: 1984-12

Media Info

• Pagination: p. 10-16
• Serial:
  • CONCRETE BETON
  • Issue Number: 35
  • Publisher: Concrete Society of Southern Africa
  • ISSN: 0379-9824

Subject/Index Terms

• TRT Terms: Aggregates; Alkali; Base course (Pavements); Cement; Chemical reactions; Concrete pavements; Construction; Cracking; Crushed rock; Deterioration; Dowels (Fasteners); Drainage; Durability; Joint sealers; Overlays (Pavements); Pavement design; Pavers; Paving; Prevention; Riding qualities; Rigid pavements; Road construction; Shrinkage; Soil stabilization; Specifications; Stabilized materials; Subbase (Pavements); Weather; Workability
• Uncontrolled Terms: Subbase
• Geographic Terms: South Africa
• Old TRIS Terms: Construction problems; Shrinkage cracks
• ITRD Terms: 4577: Aggregate; 7353: Alkali; 4758: Cement; 5211: Cracking; 5255: Deterioration; 5910: Durability; 3055: Pavement design; 3663: Paver; 9149: Prevention; 7156: Reaction (chem); 2964: Rigid pavement; 3665: Road construction; 3688: Roadbase stabilization; 4743: Shrinkage; 8103: South Africa; 177: Specifications; 2545: Weather; 5941: Workability
• Subject Areas: Construction; Design; Geotechnology; Highways; Hydraulics and Hydrology; Materials; Pavements; Security and Emergencies; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00452753
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 31 1986 12:00AM