EVALUATION OF STRESS ABSORBING MEMBRANE (SAM) AS A SEAL COAT-CATEGORY II EXPERIMENTAL

A stress absorbing membrane (SAM) using rubberized asphalt was applied like a seal coat as a method of stopping or retarding future reflective cracking in asphalt cement pavement. The rubberized asphalt is being tested as a method of providing a more ductile layer that will not crack due to temperature variation stresses and will bridge over cracks in the existing pavement. The test sections were examined for reflective cracking and photographs were taken of each test section. After six months of service, transverse cracks present in the original test sections, reflected through the stress absorbing membrane. The cracks present were measured for size and condition. The rideability of the SAM test sections are considered good; however, they are no better than the test sections treated with the conventional sealcoat. Nearly all SAM test sections show cracks averaging 1/4" wide, with SAM material being kneaded into the opening. A few test sections exhibit raveling of the SAM material in the wheel paths and a few test sections have cracks kneaded closed in the wheel paths. Test sections of conventional sealcoat have cracks 1/8" wide, which implies that SAM tends to shrink away when a crack develops.

  • Corporate Authors:

    Idaho Transportation Department

    3311 W State Street, P. O. Box 7129
    Boise, ID  United States  83707-1129
  • Authors:
    • Mample, S J
    • VAN OVER, L E
  • Publication Date: 1980-5

Media Info

  • Features: Appendices; Photos;
  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00319405
  • Record Type: Publication
  • Report/Paper Numbers: Proj 77-03-02 Final Rpt.
  • Files: TRIS, STATEDOT
  • Created Date: Jan 19 1981 12:00AM