CALCRETES IN ROAD CONSTRUCTION

Calcretes are the third most widely used road aggregate in South Africa, and have been successfully used in all road layers from surface chippings downwards. It is pointed out however, that their behaviour cannot be reliably predicted from some of the traditional tests and specifications for road materials developed in North America and northern Europe. South African experience has shown that when calcretes are used it is possible, and sometimes necessary, to depart considerably from traditional specifications for road layers. Problems encountered with calcretes include: identification, location, testing, and use (disintegration under traffic or compaction, absorption of bituminous binders, and salt damage). (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03794792
• Corporate Authors:

  National Institute for Transport & Rd Res S Af

  P.O. Box 395
  Pretoria 0001, Transvaal,   South Africa 
• Authors:
  • Netterberg, F
• Publication Date: 1981-8

Media Info

• Features: Photos; References;
• Pagination: 2 p.
• Serial:
  • Transport and Road Digest
  • Issue Number: 34
  • Publisher: National Institute for Transport & Rd Res, S Af
  • ISSN: 0379-4792

Subject/Index Terms

• TRT Terms: Aggregates; Calcretes; Carbonates; Durability; Performance based specifications; Road construction; Rural areas; Soils; Specifications
• Uncontrolled Terms: Low cost roads
• Geographic Terms: South Africa
• ITRD Terms: 4577: Aggregate; 7312: Carbonate; 5910: Durability; 2986: Low cost road; 3665: Road construction; 328: Rural area; 4156: Soil; 8103: South Africa
• Subject Areas: Geotechnology; Highways; I36: Aggregates;

Filing Info

• Accession Number: 00368684
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Jan 31 1983 12:00AM