The findings of this investigation indicate that stabilization of cohesive soils to obtain improved subgrades for all-pupose roads and better subbases for lightweight roads can be obtained with the use of reactive brown coal fly ash; the reactive ingredient in these fly ashes, viz., free lime, can vary from seven to over twenty percent by weight. Stabilization of non-cohesive soil can be accomplished with usage of both reactive and unreactive fly ashes with corresponding decreases in cement requirements with no significant technical problems. The production of fly ash concrete necessitates closer and more detailed investigation of the role of non-reactive fly ash in concrete. An investigation of the use of nonreactive, brown coal fly ash as a filler in portland cement concrete and bituminous mixes for road embankments is also recommended. In Poland, the use of fly ash in road construction has helped bring improvement and greater safety in motor transport, economic savings in costs, improved working and living conditions due to lessening in pollution and improving the appearance of the environment. /FHWA/

  • Supplemental Notes:
    • Work performed under Agreement No. 3 (PL 480).
  • Corporate Authors:

    Ministry of Transport, Poland

    Road and Bridge Research Institute
    Warsaw,   Poland 

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Pachowski, J
  • Publication Date: 1979-9

Media Info

  • Pagination: 153 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00302015
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-79-101 Final Rpt.
  • Files: TRIS, USDOT
  • Created Date: Dec 19 1979 12:00AM