A NEW HOT-MIX DESIGN METHOD FOR SOUTHERN AFRICA

The paper describes the background, structure and components of a new hot-mix asphalt design method for Southern Africa. The design method is a result of a two-year project coordinated by a project management group consisting of representatives from research agencies, client bodies and industry. The new design method is centred on spatial design concepts and established knowledge of mix design, with additional validation of expected performance being attained through laboratory tests and prediction models. The mix design method integrates pavement structural design concepts with knowledge of mix type behavior to provide guidelines for mix type and layer thickness selection. Information on traffic volume, climate and the geometric situation is used to rank design objectives and select appropriate performance tests. Stochastic modelling concepts are also introduced, particularly to assess rutting potential as well as the effects of gradation variability on volumetric design parameters. The paper provides an overview of tests and procedures used for the evaluation of rutting, fatigue, durability, moisture sensitivity and permeability. Aspects related to the implementation program are also discussed in the paper. (a) For the covering entry of this conference, please see ITRD abstract no. E202467.

• Corporate Authors:

  Australian Asphalt Pavement Association

  Level 2, 5 Wellington Street
  Kew, Victoria  Australia  3101
• Authors:
  • Jooste, F J
  • Taute, A
  • Verhaeghe, BMJA
  • Visser, A T
  • MYBURGH, P A
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: 15-28 (SESSION 11)
• Serial:
  • WORLD OF ASPHALT PAVEMENTS, INTERNATIONAL CONFERENCE, 1ST, 2000, SYDNEY, NEW SOUTH WALES, AUSTRALIA
  • Publisher: Australian Asphalt Pavement Association

Subject/Index Terms

• TRT Terms: Bituminous mixtures; Climate; Conferences; Durability; Fatigue (Mechanics); Flexible pavements; Forecasting; Geometric design; Hot coated materials; Laboratories; Loads; Mathematical models; Mix design; Moisture content; Pavement design; Permeability; Rutting; Structures; Tests; Thickness; Traffic
• Geographic Terms: Africa
• ITRD Terms: 8001: Africa; 4967: Bituminous mixture; 8525: Conference; 5910: Durability; 3355: Engineering structure; 5579: Fatigue (mater); 2944: Flexible pavement; 132: Forecast; 4997: Hot coated material; 6237: Laboratory (not an organization); 2885: Layout; 5567: Load; 6473: Mathematical model; 4714: Mix design; 5920: Moisture content; 3055: Pavement design; 5921: Permeability; 3081: Rutting (wheel); 6255: Test; 5933: Thickness; 755: Traffic; 2545: Weather
• Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management; Pavements;

Filing Info

• Accession Number: 00812685
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Jul 2 2001 12:00AM