This report presents the results of a laboratory study to evaluate the effectiveness of two proprietary materials, Paczyme and Reynolds Road Packer, for improving the compactability and strength of fine-grained soils. The testing program used to evaluate the materials was developed by FHWA and endorsed by the manufacturers prior to its initiation. The testing program was conducted on four fine-grained soils of three different clay mineralogies typical of those found in the mid-Atlantic States. The effects of Paczyme and Road Packer on Atterberg limits, the optimum moisture content and maximum dry density as determined by AASHTO Methods T 99 and T 180, unconfined and triaxial compressive strength California Bearing Ratio (CBR) and resistance R-Value and expansion pressure, were determined. Based on the results of the testing program it was concluded that neither Paczyme nor Road Packer produced sufficient alteration of soil properties to be of any practical utility. The ineffectiveness of the materials evaluated was attributed, in part, to the nature of the soils used -- all four were acidic. It has been postulated by researchers conducting a similar, but broader study, that acidic products such as Paczyme and Road Packer may only be effective with neutral or alkaline soils. /FHWA/

  • Corporate Authors:

    Federal Highway Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Fohs, D G
  • Publication Date: 1975-3

Media Info

  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00179462
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-75- 32 Final Rpt., FCP 24D2-012
  • Files: TRIS, USDOT
  • Created Date: Aug 27 1988 12:00AM