- Author
- Rossiter, W. J., Jr. | Martin, J. W. | Lechner, J. A. | Seiler, J. F., Jr.
- Title
- Creep-Rupture Resistance of Seam Specimens Sampled From In-Service EPDM Roof Membranes.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- International Waterproofing Association. International Conference, 8th. May 1992, Brussels, Belgium, 331-343 p., 1992
- Keywords
- roofs | membranes | seams | adhesives | roofing (finishes) | creep tests | rubber | sheets
- Abstract
- Samples of seams having neoprene-based and butyl-based adhesives were cut from two EPDM roofing systems that were 86 and 39 months old. Creep-rupture tests in a T-peel configuration were conducted on specimens cut from the samples and the results compared with the measured short-term peel strengths of companion specimens. The thickness of the adhesive layer was measured for each specimen. The creep-rupture results were also compared with those from previous studies on laboratory-prepared specimens. The analysis showed that the peel strengths of the seams were typical of non-primed neoprene-based and butyl-based seams sampled from roofs in service. The thicknesses of the adhesive layers were generally greater than those found in specimens previously cut from roofs. In general, the times-to-failure for these field specimens (which had relatively thick adhesive layers) were considerably greater than those found for laboratory specimens prepared using well-cleaned EPDM rubber and thin layers of adhesive.