Special solutions are needed for constructing streets or roads on very soft soil or on the basis of poor bearing capacity. One solution is to make the structure as light as possible, which reduces the consolidation settlement. The estimated daily traffic on the test road will be 5,000 to 10,000 vehicles, the heavy traffic accounting for a major part due to the near-by industrial area. A full depth asphalt structure was designed for the ring road using two different design methods in wide use abroad . The test sections were of two types: cell structure and structures reinforced with two horizontal nets. On the basis of laboratory tests, hot bitumen was used as binder. The material of the selected nets was polyester. The bitumen light gravel mixtures for the horizontal net could be laid mostly with asphalt pavers, into which the mixture could be dumped straight from the lorry over the light gravel layers soaked with bitumen emulsion. In the cell area, the mixture was transferred from the lorry to the cells with a digger. The cells were filled in several stages with intervening compaction. Measurements of drilling samples have shown the compaction of both structures under testing to have succeeded well. The compaction criteria given by the laboratory have been reached. (TRRL)


  • Finnish

Media Info

  • Pagination: p. 13-16
  • Serial:
    • Asfaltti
    • Issue Number: 44
    • ISSN: 0356-0120

Subject/Index Terms

Filing Info

  • Accession Number: 00492445
  • Record Type: Publication
  • Source Agency: VTT Technical Research Centre of Finland
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1990 12:00AM