BASE STABILIZATION

Base stabilization is discussed in general terms and stabilization materials and methods are detailed. For load carrying capacity, the degree of stability for a satisfactorily compacted material, is primarily a function of resistance to lateral flow. Resistance to lateral displacement is a function of internal friction and cohesion. Stabilizing agents are used to obtain and maintain desired moistures, increase cohesion, to produce a cementing action, and to act as a water proofing material. Soil-asphalt stabilization is described. All presently refined asphalt materials may be mixed with some type of sand, soil, or aggregate and soil mixture in a stabilizing process. The normal gradation limits of materials recommended for stabilization with asphalt are tabulated. Values of the liquid limit, plastic limit, and shrinkage limit will indicate the method of working with each material. Soil stabilization with asphalt emulsion lends itself well to layer construction where additional thicknesses may be added as needed for increased traffic. Asphalt emuslion has successfully stabilized a wide range of aggregate types for use as bases under hot asphaltic concrete, shoulder stabilization, and conventional surface treatment by a multitude of processes. Tar stabilization is discussed, and it is observed that although soil stabilization with tar is often a low type of construction, it is important that attention be paid to the quality of materials used, to proper proportioning of tar and soil, to moisture control during mixing and compacting, and to the compacting, and to the provision of adequate compactive effort. Soil cement stabilization is reviewed, as well as lime-soil stabilization. The latter is a relatively low cost method of base construction since 100 percent in-place material can be used. Calcium chloride stabilization is outlined, and its use in base courses and unpaved roads is detailed. Details are also given of sodium chloride stabilization.

Media Info

  • Features: Tables;
  • Pagination: p. 61-73
  • Serial:
    • Volume: 16
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 00081573
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 19 1975 12:00AM