NITRR RESEARCH ON SEGMENTAL BLOCK PAVING IN THE RSA (1981-1984). (PART II)

The NITRR evaluated over 50 experimental block pavements constructed to various specifications. The evaluations included the use of many sophisticated techniques available at the NITRR including its heavy vehicle simulator (hvs). Other instruments used included the South African developed multidepth deflectometer for monitoring micro-strains within individual support layers under the block layer. This research resulted in the publication of a structural design guide for segmental block pavements for Southern Africa (RP/9/84). The guide covers all aspects of block design, including the choice of bonding pattern, specifications for bedding sand and jointing material, and provides a catalogue of designs for varous categories of use. Research also showed that properly built block pavements provide a highly waterproof pavement and a simple test was devised to measure the waterproof characteristics of a pavement in situ. The structural strength of a block pavement is a function of the strengths of the structural supporting layers and of the blocks and their jointing. Studies on the role of joints in the flexible response system of segmental block pavements have established their importance in terms of both riding quality and waterproofing. Some measure of strength of the pavement structure is also attributable to the joints. One outcome of the study of jointing material is the development of a more exacting specification for jointing material. The grading envelope is given and is compared with earlier specifications. The use of material within this recommended grading envelope is of greater importance to the strength of heavy-structural block pavements than to non-structural pavements. For abstract of Part I (Research on Segmental Concrete Block Paving in the RSA (1967-1983) see TRIS 452751. (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:
  • Clifford, J M
• Publication Date: 1984-9

Media Info

• Features: Figures;
• Pagination: p. 16-18
• Serial:
  • CONCRETE BETON
  • Issue Number: 34
  • Publisher: Concrete Society of Southern Africa
  • ISSN: 0379-9824

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bonding; Concrete; Concrete blocks; Deflection; Deformation; Evaluation and assessment; Groups; Joints (Engineering); Loads; Pavement design; Pavement performance; Pavements; Paving stones; Permeability; Riding qualities; Sampling; Sand; Segmental construction; Simulation; Specifications; Strength of materials; Waterproofing
• Geographic Terms: South Africa
• Old TRIS Terms: Block sampling; Pavement deflection
• ITRD Terms: 4755: Concrete; 5595: Deformation; 9020: Evaluation (assessment); 2998: Joint (structural); 5567: Load; 3055: Pavement design; 2961: Roadbase; 4105: Sand; 4508: Sett (stone); 9103: Simulation; 8103: South Africa; 177: Specifications; 5544: Strength (mater); 3375: Waterproofing
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00452752
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jul 31 1986 12:00AM