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Effects of moisture and freeze-thaw cycles on the strength of bituminous built-up roofing membranes

From National Research Council Canada

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ConferenceSymposium on Roofing Technology, September 21-23, 1977, Gaithersburg, Maryland, United States
SubjectRoofs; Moisture performance; roofing; bituminous roofings; built up roofings; freeze thaw cycles; moisture content; mechanical properties; asphalt based roofing materials; immersion treatment; thermal- moisture gradient; coal tar pitch membrane; tensile properties; multi-ply membrane; dog-bone specimens preparation
Abstract
The water uptake of an asphalt based built-up roofing membrane subjected to immersion and to a thermal-moisture gradient was measured. A 20-year-old coal tar pitch membrane removed from a roof was also exposed to the moisture gradient. The effect of water immersion and subsequent freeze-thaw cycling on the tensile properties of the asphalt membrane was determined. In preliminary work, an apparatus was developed to produce a large sheet of multi- ply membrane with uniformly thick bonding coats. Improvements were made in preparing dog-bone specimens for tensile testing by reducing edge damage and eliminating slippage at the jaws.
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  • Proceedings, Symposium on Roofing Technology, Gaithersburg, MD., 21-23 Sept. 1977 (1977): 244–251.
LanguageEnglish
Peer reviewedNo
IdentifierDBR-P-759
NRC numberNRCC 16524
NRC-IRC-3493
NPARC number20375936
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Record identifier80cc710b-51e7-457c-a72e-a9b2c3d2013d
Record created2012-07-23
Record modified2024-03-14
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