Sensitivity of in-service skid resistance performance of chipseal surfaces to aggregate and texture characteristics

A statistical modelling study was undertaken to identify critical aggregate properties from the perspective of in-service skid resistance performance of chipseal surfaces. Emphasis was placed on straight and level road sections to minimise confounding effects brought about by braking, cornering, and traction manoeuvres. The principal finding was that the critical determinants of in-service skid resistance performance of chipseal surfaces were cumulative heavy commercial vehicle (HCV) passes and the mean spacing between tips of aggregates. However, significant inter-relationships between aggregate microtexture and macrotexture were also identified, which require additional investigation given their implication to current seal design practice. The preliminary indications are that the selection of �rounded� alluvial aggregates for skid resistant surfaces should be predicated on PSV as is current practice whereas selection of �angular/sharp-edged� hard rock aggregates should be predicated on size (the smaller the better) and ability to withstand tip and edge wear caused by HCV traffic. (a) For the covering entry of this conference, please see ITRD abstract no. E212865.

• Authors:
  • Cenek, P D
  • JAMIESON, N J
• Publication Date: 2005-5

Language

• English

Media Info

• Pagination: 23P (SESSION 8)
• Monograph Title: International Surface Friction Conference: roads and runways: improving safety through assessment and design, 1-4 May 2005, Christchurch, New Zealand
• Serial:
  • INTERNATIONAL SURFACE FRICTION CONFERENCE, 2005, CHRISTCHURCH, NEW ZEALAND
  • Publisher: TRANSIT NEW ZEALAND

Subject/Index Terms

• TRT Terms: Aggregates; Angularity; Building materials; Chippings; Coefficients; Conferences; Mathematical models; Polished aggregates; Properties of materials; Seal coats; Skid resistance; Surfaces; Texture
• ITRD Terms: 4577: Aggregate; 5945: Angularity; 4585: Chippings; 6410: Coefficient; 8525: Conference; 4555: Material (constr); 6473: Mathematical model; 3822: Polishing; 5925: Properties; 3031: Skid resistance; 6438: Surface; 2984: Surface dressing; 3053: Surface texture
• Subject Areas: Geotechnology; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I36: Aggregates;

Filing Info

• Accession Number: 01026763
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Jul 5 2006 12:07PM