SAND AND GLACIAL TILL IN ROAD CONSTRUCTION

SAND OG MORAENE I VEJBYGNING

This report deals with the use of low quality aggregate for pavement construction. Low quality aggregate is defined as uniformly graded sand or well graded with a high content of fines (glacial till). Uniformly graded sand is used to a certain extent in Denmark, Iceland and Norway as a subbase in road pavements. The sand is more difficult to place and compact than well graded materials. To increase the stability of the subbase a 10 cm thick layer of clean, well graded gravel is often spread on top of the sand. Low quality aggregate stabilized with cement has been used in nordic countries mainly on test roads. Plant mix as well as mix in place has led to a favourable result. The main problem is that uniformly graded sand requires a rather high addition of cement and the high cement content increases the shrinkage. Low quality aggregate, mainly sand, stabilized with bitumen has been tested in Denmark, Sweden and Finland. Tar has been tried out as a stabilizing agent in Denmark. Further experience has to be acquired. Low quality aggregate stabilized with lime, flyash and cement has recently been placed in some test sections in Denmark. Sweden is investigating the use of blast furnace slag. Work on flyash and blast furnace slag is in progress in Finland. At the present stage no recommendations can be made. (TRRL)

  • Corporate Authors:

    Nordiska Vaegtekniska Foerbundet

    Statens Vaegverk
    Borlaenge,   Sweden 
  • Publication Date: 1980

Language

  • Danish

Media Info

  • Features: Figures; Tables;
  • Pagination: 69 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00330381
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: NR 16:1980 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jul 9 1981 12:00AM