Overview of enhancements to road surfacing seal design methodologies through seal system and materials modelling

Under the SANRAL South African Road Design System (SARDS) Project, research has been undertaken in the field of Thin Surfacings, specifically the road surfacing seal system. The purpose of the seal project is to enhance road surfacing seal design, within the SARDS system. Towards achieving this advance, the seal system has been modelled using finite element methods, and the full system has been developed to model different seal types, on differing pavement types, with variation in environment and traffic. As input to the model, materials research using the Dynamic Shear Rheometer (DSR) has enabled the response and damage modelling of the various bituminous seal binders, under different temperature and ageing regimes, and the seal system simulated using a finite element analysis platform. This paper provides insight into the evolution of the seals component of the SARDS project, and the current road seal design processes, through various stages to the current proposals regarding enhancing seal design, that includes performance assessment and modelling, and its potential contribution in enhancing SARDS.

Language

  • English

Media Info

  • Pagination: 12p
  • Monograph Title: 11th Conference on Asphalt Pavements for Southern Africa: CAPSA15, 16-19 August 2015, Sun City, South Africa

Subject/Index Terms

Filing Info

  • Accession Number: 01597115
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Apr 22 2016 11:15AM