Process secure automated road construction

To achieve the best possible quality in the construction process of an asphalt pavement, a large number of parameters have to be controlled and kept in their optimal range. Above all the temperature of the asphalt mixture in the process chain is a crucial factor which affects the laying and compaction. Parameters of the paver like installation speed and settings of the screed are of further importance. All parameters have a strong influence on the degree of compaction, the homogeneity and evenness of the asphalt layer. In combination with a possible segregation of the mixture during the material transfer all this can lead to a reduced service life of the asphalt pavement. To improve and control the whole production process of a pavement, partners from industry, universities and administration initiated the research project “Process secure automated road construction”. It was started in late 2008 and is funded by the German Federal Ministry of Economics and Technology. After a detailed analysis of the weak spots was carried out, strategies for the improvement of the various processes were developed and implemented in demonstrators. In the project, the potentials of the information technology are used for process control and settings of the construction machines. Simulation models are used to tackle segregation problems and optimize material transfer. Altogether it is expected to improve the quality of the finished asphalt layer. The results of the analysis of the weak spots were the basis for the development and production of the following demonstrators: a) Loading unit without segregation (asphalt mixing plant – dumper); b) Dumper with automated covering and thermal insulation; c) Modified auger/screw conveyor (segregation/temperature loss); d) Continuous collection and recording of relevant temperatures (paver, behind the screed, paved asphalt layer); and, e) Positioning system for sensors (temperature and others). These demonstrators were tested on a construction site on a German motorway in the summer of 2010. In particular the sensor technology (determination and transfer during the construction phases as well as during the life cycle) give a first step towards an “Intelligent Road”. First results were successful and promising.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Photos; References; Tables;
  • Pagination: 9p
  • Monograph Title: 24th World Road Congress Proceedings: Roads for a Better Life: Mobility, Sustainability and Development

Subject/Index Terms

Filing Info

  • Accession Number: 01519961
  • Record Type: Publication
  • ISBN: 2840602679
  • Files: TRIS
  • Created Date: Mar 17 2014 8:34PM