Open graded emulsion mixtures (OGEM) have been used extensively as road surfaces in the Pacific Northwest since 1966. The mixtures consist of open-graded aggregate (20x6 mm) and 5 to 7% of a cationic mixing graded emulsion (CMS-2 or CMS-2h). This paper presents the results of several agency experiences that indicate that OGEM usually performs as well or better than conventional dense-graded asphalt concrete in most applications. It also includes mix properties (modulus, changes in gradation with time, etc.) to illustrate that conventional test procedures during this period as well as guidelines are not appropriate for evaluating this product. The paper includes layer equivalencies which have evolved during this period as well as guidelines for use of OGEM. Over 16,000 km of road have been surfaced with OGEM during this period.

  • Corporate Authors:

    Asphalt Emulsion Manufacturers Association

    #3 Church Circle, Suite 250
    Annapolis, MD  United States  21401
  • Authors:
    • Hicks, R G
    • Richardson, E S
    • Huddleston, I J
    • Jackson, N B
  • Conference:
  • Publication Date: 1994


  • English

Media Info

  • Features: References; Tables;
  • Pagination: p. 1-10

Subject/Index Terms

Filing Info

  • Accession Number: 00770511
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 17 1999 12:00AM