THE EFFECT OF THE PROPORTION OF RECLAIMED ASPHALT ON ASPECTS OF THE QUALITY OF RECYCLED MIXES --BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE, PLYMOUTH, ENGLAND, SEPTEMBER 16-18, 1986

Recent work has provided a model to relate the expected savings to the circumstances under which recycling is done and has offered an economic evaluation method for relating these to concerns about the quality of the recycled mix. Although such an analysis can be based on subjective opinion of the quality, its relevance will be much enhanced by empirical data. This paper describes the results of the first phase in a programme of work designed to provide such data. It identifies the factors possibly causing recycled mixes to have poorer quality than conventional mixes as being those relating to the difficulty in controlling the composition of the mix and those relating to any inferior properties of the reclaimed weathered binder. It is to the latter question that this phase of work is being addressed. An experiment was carried out to test the initial engineering properties of base mixes composed of different proportions of reclaimed material. These properties were compared with those of conventional mixes. The results showed no decrease in quality with increased proportion of reclaimed material and suggest that for bases the maximum percentage of reclaimed material that can be processed within practical constraints should be used to obtain the most economic result. Note however that these observations are tentative and that they pertain only to the initial properties and not to the durability of the mix.(a) for the covering abstract of the conference see IRRD 815528.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/095111171X
• Corporate Authors:

  WDM LIMITED

  WESTERN WORKS, STAPLE HILL
  Bristol, Avon,   United Kingdom 
• Authors:
  • Servas, V P
  • Ferreira, M A
  • Curtayne, P C
  • Viljoen, A W
• Publication Date: 1986

Language

• English

Media Info

• Pagination: p. 91-104
• Serial:
  • Publication of: WDM LIMITED
  • Publisher: WDM LIMITED

Subject/Index Terms

• TRT Terms: Benefit cost analysis; Bitumen; Bituminous mixtures; Conferences; Creep; Durability; Fatigue (Mechanics); Loads; Mix design; Quality control; Recycling; Strength of materials; Tension; Tests
• Uncontrolled Terms: Quality
• Geographic Terms: South Africa
• Subject Areas: Data and Information Technology; Finance;

Filing Info

• Accession Number: 00482191
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0-9511117-1-X
• Files: ITRD, TRIS
• Created Date: Apr 30 1989 12:00AM