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

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Pages244251; # of pages: 8
SubjectRoofing; 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; Roofs; Moisture performance; Couvertures; couverture bitumineuse; multicouche; gel de gel; degre hygrometrique; propriete mecanique
AbstractThe 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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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number16524
NPARC number20375936
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Record identifier80cc710b-51e7-457c-a72e-a9b2c3d2013d
Record created2012-07-23
Record modified2016-05-09
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