THE PERFORMANCE OF STEEL SLAG AGGREGATES: CHARACTERISTICS OF PAVING MIXES

This paper discusses the performance of wearing course mixtures of 14mm nominal aggregate size, which are becoming increasingly popular. Various materials were analysed, including: (1) a traditional close graded wearing course (CGWC) macadam; (2) an all steel slag hot rolled asphalt with 45% stone content; and (3) stone mastic asphalt materials. The latter two materials were specialist wearing course materials. Performance measurements were conducted, to establish the level of steel slag performance benchmarking against: (1) a natural crushed rock aggregate; and (2) specification limits. The laboratory measurements included: (1) elastic stiffness measurements; (2) Marshall properties including stability values at 60 degrees C; and (3) wheel-tracking rates at 45 degrees C. In comparing the performance of steel slag with that of a natural aggregate mix, it was decided to use the data collected from analysing a series of traditional macadam mixtures. The aggregate types used were manufactured steel slag and natural granite. The use of an aggregate, such as steel slag, in the surfacing layer of a pavement was found to be entirely justified. For the covering abstract see IRRD 877211.

• Corporate Authors:

  THE INSTITUTE OF ASPHALT TECHNOLOGY

  OFFICE 5, TRIDENT HOUSE, CLARE ROAD
  STANWELL, MIDDLESEX  United Kingdom  TW19 7QU
• Authors:
  • READER, M
  • Stock, A F
  • Taylor, I F
• Publication Date: 1995

Language

• English

Media Info

• Features: References;
• Pagination: p. 47-50
• Serial:
  • THE ASPHALT YEARBOOK 1996
  • Publisher: THE INSTITUTE OF ASPHALT TECHNOLOGY

Subject/Index Terms

• TRT Terms: Aggregates; Bituminous mixtures; Elasticity (Mechanics); Hot coated materials; Mastic asphalt; Measurement; Penetration macadam; Slag; Stiffness; Surfacing; Wearing course (Pavements)
• Uncontrolled Terms: Pervious macadam
• ITRD Terms: 4577: Aggregate; 4967: Bituminous mixture; 5912: Elasticity; 4997: Hot coated material; 6136: Measurement; 4946: Porous asphalt; 4561: Slag; 5931: Stiffness; 2972: Surfacing; 2980: Wearing course
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00722423
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Jun 28 1996 12:00AM