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

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Journal titleDurability of Building Materials
Pages20928; # of pages: 182
SubjectRoofing; 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; Roofs; Moisture performance
AbstractStresses 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
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number24239
NPARC number20375584
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Record identifier03e58ae6-7c95-4437-af09-1d98db787a02
Record created2012-07-23
Record modified2016-05-09
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