A salt and aggregate base course pugmill mix has been proved to be an economical durable base material following testing on a 2-mile section in Illinois. The materials were mixed with water in a twin-shaft pugmill under calibrated conditions and placed in 1973. For comparison, a test section 0.35 mile long was placed nearby using the same aggregate without salt. Details are described of the mixing of sodium chloride which was added at the rate of 1.5 percent of a 96 percent sodium chloride material based on dry weight. The mixture was spread in 2 uniform layers and to a depth that would produce the compacted thickness specified, using an approved spreading and leveling device that spreads and shapes the material. Details of compaction, curing and prime coating are briefly described. The 3 miles of road required 21,770 tons of material at a cost of $3.20 per ton. The equipment, labor, spreading and finishing cost approximately $0.70 per ton. Problems encountered in the project are discussed. The base material is currently being tested. Pavement deflections (by a Benkelman Beam) were measured in 1974 and 1975. The average deflection in 0.001 for the control section was 97.9 while that for the salt-aggregate mixture was 65.7. Cores taken in May 1974 indicate that the mixture was homogeneous throughout.

  • Corporate Authors:

    Scranton Publishing Company

    434 South Wabash Avenue
    Chicago, IL  United States  60605
  • Authors:
    • Ward, F W
  • Publication Date: 1976-1

Media Info

  • Features: Photos; Tables;
  • Pagination: p. 48-49
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00134019
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 23 1976 12:00AM