THE DESIGN OF HIGH MODULUS BASE MIXTURES

A recipe approach to the specification of continuously graded roadbase mixtures is not viable when performance parameters are required with the structural design of a road pavement. Although continuously graded roadbase mixtures have been classified on the basis of mechanical strength there remains no guidance on the design of such mixtures in any rational manner to ensure minimum strength values are achieved. A volumetric approach has been developed for the design of continuously graded roadbase mixtures. The approach is based on the design of the aggregate structure; the design is specific to the available sources of mineral aggregate and filler. The approach allows a materials engineer to define the aggregate grading to maximise the basic strength of the mixture. The fundamental principal is that the aggregate structure, or key fractions forming the aggregate the structure, are able to fully interlock during the process of material layer compaction. From the definition of a target aggregate grading the procedure then allows the definition of the optimum binder content. The formulation of a short range of mixtures can confirm a design and define mechanical properties. In addition, the approach allows an assessment of the effect of, and risk involved with, ingredient variation as a result of plant production. (A) For the covering abstract see IRRD 890024.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/3931681149
• Corporate Authors:

  AEDIFICATIO PUBLISHERS

  IMMENTALSTR 34
  FREIBURG I.BR,   Germany  D-79104
• Authors:
  • FORDYCE, D
  • FERGUSON, A
  • KHWEIR, K
• Conference:
  • PERFORMANCE AND DURABILITY OF BITUMINOUS MATERIALS. PROCEEDINGS OF THE SECOND EUROPEAN SYMPOSIUM ON PERFORMANCE AND DURABILITY OF BITUMINOUS MATERIALS, LEEDS, APRIL 1997
• Publication Date: 1997

Language

• English

Media Info

• Features: References;
• Pagination: p. 195-209

Subject/Index Terms

• TRT Terms: Aggregates; Base course (Pavements); Binder content; Bituminous mixtures; Conferences; Continuous structures; Mix design; Volume
• ITRD Terms: 4577: Aggregate; 4929: Binder content; 4967: Bituminous mixture; 8525: Conference; 9006: Continuous; 4714: Mix design; 2961: Roadbase; 6468: Volume
• Subject Areas: Bridges and other structures; Data and Information Technology; Geotechnology; Highways;

Filing Info

• Accession Number: 00739317
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 3-931681-14-9
• Files: ITRD
• Created Date: Aug 28 1997 12:00AM