LATEX MODIFIED SURFACE TREATMENT AS A SAMI (STRESS ABSORBING MEMBRANE INTERLAYER)

The use of a stress absorbing membrane interlayer (SAMI) is not a new concept. The SAMI usually consists of a seal coat with a rubberized asphalt made with granulated tire tread rubber. This project used the surface treatment which consists of a double seal coat with an asphalt modified withlatex rubber that was added to the asphalt emulsion and blended in the distributor for 15 minutes. The asphalt was an E-2 anionic emulsion to which 3 percent by weight of the latex rubber solids was included in the asphalt bitumen. The project consisted of a section that was cracked badly with reflective cracks and alligatored which has presented problems with maintaining a good bond with the bituminous overlay. The achievement of a longer service life of this pavement section is the main purpose ofthis experimental project. (Author)

• Corporate Authors:

  Pennsylvania Department of Transportation

  Engineering District 1-0, 1140 Liberty Street
  Franklin, PA  United States  16323

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Morian, D A
  • Mellott, D B
• Publication Date: 1985-2

Media Info

• Features: Appendices; Figures;
• Pagination: 25 p.

Subject/Index Terms

• TRT Terms: Absorption; Alligator cracking; Interfaces; Latex asphalt; Reflection cracking; Rubberized bitumen; Seal coats; Stresses; Texture
• Uncontrolled Terms: Interlayers; Membranes
• Old TRIS Terms: Alligatoring; Membranes (Biology)
• Subject Areas: Geotechnology; Highways; Materials; Pavements; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00450613
• Record Type: Publication
• Report/Paper Numbers: FHWA-PA-84-033, 83-42
• Files: TRIS, USDOT, STATEDOT
• Created Date: Aug 27 2004 9:01PM