Language selection

Government of Canada / Gouvernement du Canada

Search

Interply adhesion and blistering of the bituminous built-up roofing membranes

From National Research Council Canada

Download
  1. (PDF, 2.3 MiB)
AuthorSearch for: ; Search for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada
FormatText, Article
SubjectRoofs; Moisture performance; roofing; bituminous roofings; built up roofing; blistering; adhesion; stresses; adhesion; asphalt; bituminous roofing membranes; blister tests; built-up roofs; cotton fabric plies; moisture; peel tests; pull-off tests; shear tests; surface pressure
Abstract
Stresses in built-up roofing membranes are caused by differential movements due to loads, temperature variations, and moisture changes. If excessive over a period of time they cause premature failure of the membrane, the most common symptom being blistering and interply separation. The effect of moisture and applied pressure on the interply adhesion of built-up roofing membranes and on the development of blisters has been investigated. Some 200 specimens from different samples of built-up roofing membranes made with conventional Type 15 organic felt plies or with cotton fabric plies (denim cloth) were tested at varying amounts of moisture, surface pressure, and rate of loading. When the specimens were subjected to pull-off, peel, shear and blistering tests it was evident that adhesive bond is affected by: voids at the interface, moisture in the asphalt felt or fabric, perforations of the felt or fabric plies, compressive loads on the membrane surface and their duration prior to testing, viscoelastic behaviour of the binder.
Publication date
In
  • Durability of Building Materials 2 (1985): 209–228.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-1267
NRC numberNRCC 24239
NRC-IRC-3338
NPARC number20375584
Export citationExport as RIS
Report a correctionReport a correction (opens in a new tab)
Record identifier03e58ae6-7c95-4437-af09-1d98db787a02
Record created2012-07-23
Record modified2023-12-04
Date modified: