EVALUATION OF STRESS ABSORBING MEMBRANE INTERLAYER (SAMI) IN IDAHO

From the evaluation, it was concluded that many of the pre-existing longitudinal cracks have not reappeared. Furthermore, none of the pre-existing "alligator" or "ladder" type cracks have reappeared, within the two years tht these projects have been evaluated. The developer of the asphalt-rubber Stress Absorbing Membrane Interlayer (SAMI) system of controlling reflective cracking claimed tht their system would control longitudinal and "alligator" or "ladder" cracking but the system would not control transverse temperature type cracking. Therefore, the SAMI performed as expected. There were "control test sections" placed on both projects that did not have the SAMI. These sections received the same plant mix overlay as was placed ove the SAMI. Most of the pre-existing transverse cracks present in these sections reappeared but several have not to this date. Therefore, it is recommended that Stress Absorbing Membrane Intelayers be used only if "alligator" or "ladder" type cracking is expected to be controlled. (Author)

Media Info

  • Features: Appendices; Figures; Photos; Tables;
  • Pagination: v.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00322251
  • Record Type: Publication
  • ISBN: IR-80N-2(25)82
  • Report/Paper Numbers: Project 76-03-13 Final Rpt.
  • Contract Numbers: DOT-FH-15-191
  • Files: TRIS, STATEDOT
  • Created Date: Jan 19 1981 12:00AM