ASSESSING THE PERFORMANCE OF SMA AS A SURFACING IN AN URBAN ENVIRONMENT

This paper describes a full scale trial carried out on a section of the Greenford Road, in the London Borough of Ealing. Conditional surveys on the original road indicated major cracking on the Hot Rolled Asphatl surface (BS 594) a result of the heavy traffic loading. The maintenance options considered ranged from full depth reconstruction to surface treatment. Finally it was decided to plane-off the 50mm wearing course which displayed an old open graded gravel base course on top of a concrete slab. Some sections were badly cracked due to the thermal movement of the concrete slab and consequently full depth reconstruction was carried out in these areas. In other sections the wearing course was replaced with SMA (Stone Mastic Asphalt). As a result the carriageway was surfaced with either SMA, SMA with 3mm grit or BS 594 HRA. Marshall samples were extracted and subjected to a laboratory assessment which included Cantabrian durability testing and wheel tracking. The finished road surface was tested for noise, skid resistance, hydraulic conductivity, texture depth and voidage. The initial site results have verified the laboratory findings and indicate a tremendous increase in skid resistance using SMA Grit system. (A) For the covering abstract see IRRD 885061.

• Corporate Authors:

  European Asphalt Pavement Association

  P.O. Box 175
  3620 AD Breukelen,   Netherlands 

  EUROBITUME (EUROPEAN BITUMEN ASSOCIATION)

  PLACE MADOU 1, TOUR MADOU, 25TH FLOOR
  BRUSSELS,   Belgium  1030
• Authors:
  • SLATER, K
  • Phillips, P A
  • WOODSIDE, A R
  • WOODWARD, WDH
• Conference:
  • EURASPHALT & EUROBITUME CONGRESS, STRASBOURG, 7-10 MAY 1996. VOLUME 1. PAPER E&E.1.222
• Publication Date: 1996

Language

• English

Media Info

• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Conferences; Cracking; Durability; Evaluation and assessment; Hydraulic properties; Mastic asphalt; Pavement wearing course; Pavements; Porosity; Skid resistance; Texture
• ITRD Terms: 8525: Conference; 5211: Cracking; 5910: Durability; 9020: Evaluation (assessment); 4748: Hydraulic properties; 2955: Pavement; 5938: Porosity; 3031: Skid resistance; 3053: Surface texture; 2980: Wearing course
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00731742
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Feb 27 1997 12:00AM