- 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.