Structural pavement monitoring with non-destructive measuring devices: experiences from a pilot project in Germany

Within the last 20 years, Germany's federal road network of 53,000 km has become the centre of transit road freight transport in Europe. As a large part of the network is now about 30 to 50 years old, a systematic pavement and maintenance management becomes more and more essential for road authorities. The existing German pavement condition monitoring and assessment and Pavement Management System (PMS) focuses on measured surface characteristics like longitudinal and transverse profile, skid resistance and visual damages like cracking, spalling, patching, bleeding and is conducted in a four year cycle on the entire federal road network. A pavement condition rating based on these surface characteristics is calculated using a standardised procedure. No account is taken for structural bearing capacity and often there is poor knowledge about the pavement structure, layers and thicknesses. As Falling Weight Deflectometer (FWD) deflection measurements and coring are suitable measures for project level assessments and require lane closures, there is a growing demand for Non-Destructive-Testing (NDT) methods on network level at highway traffic speed without traffic disruptions. To overcome the lack of knowledge about the structural condition and the need to detect structural pavement deteriorations, the German Federal Highway Research Institute (Bundesanstalt fuer Strassenwesen - BASt) conducted a project where NDT systems operating at traffic speed of 80 km/h like the Ground Penetrating Radar (GPR) and the Danish Traffic Speed Deflectograph (TSD) performed concerted measurements on selected highway and trunk road sections. The testing was supplemented by FWD measurements and core samples. In the following, an overview over the state-of-the-art in pavement condition monitoring and the results of NDT measurements will be given as well as an assessment of different structural pavement parameters. The observed problems and shortcomings and the advantages and possibilities of the different techniques for structural pavement condition assessment will be addressed and discussed.

Language

  • English

Media Info

  • Pagination: pp 219-228
  • Monograph Title: Bearing capacity of roads, railways and airfields: proceedings of the ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields: Trondheim, Norway 25-27 June 2013. Vol 1-2

Subject/Index Terms

Filing Info

  • Accession Number: 01596519
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • ISBN: 9788232102853
  • Files: ITRD, VTI
  • Created Date: Apr 21 2016 12:22PM