The correct use of lime, cement, and asphalt for improving material properties is discussed, and guidelines are given for selection of a stabilization approach and construction methods. The potential savings that may result by using stabilization of subgrades and/or other materials must be evaluated via a cost analysis of the different alternatives. A framework that will assist in making this analysis is graphically illustrated. Sieve analyses and Atterberg Limit tests are first performed on subgrade samples and samples for use as subbase and base courses. The use of possible stabilizers must then be determined (a chart is provided to help in this task). Estimates are then made for in-place costs of all untreated and treated materials, followed by decision of use of FPS/RPS computer design of layer equivalence concept. Finally the pavement design must be selected and the possible use of optional bids must be determined. Details of the economic analysis are outlined, and general guidelines are presented regarding the best soils that may be economically obtained for the job, techniques to determine optimum moistures and densities, equipment and construction techniques, compaction in field, curing the stabilized layers, inspection procedures, and the avoidance of soils which are high in organic matter. Included in the appendix are summaries of test methods and comments on the following: lime treatment for materials in place, lime treatment for base courses, portland cement treatment for materials in place, portland cement treatment for base courses, cement stabilized base, soil asphalt base (road mix), asphalt stabilized base (plant mix), lime-cement stabilization and lime-asphalt stabilization.

  • Corporate Authors:

    Texas State Department of Highways & Public Transp

    P.O. Box 5051
    Austin, TX  United States  78763

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011
  • Authors:
    • Epps, J A
  • Publication Date: 1975-12

Media Info

  • Features: Figures; Tables;
  • Pagination: 38 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00134670
  • Record Type: Publication
  • Report/Paper Numbers: Res. Rpt. 214-6
  • Created Date: Jun 23 1976 12:00AM