Some engineering properties of built-up roofing

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Proceedings titleASTM Special Technical Publication
ConferenceRecent Research on Bituminous Materials
Pages7081; # of pages: 12
SubjectRoofing; roofing products; tensile strength; bitumen; temperature; Roofs; Roofs
AbstractThe prevalence of splitting in built-up roofing during recent years has prompted special studies to be undertaken by the Division of Building Research to determine the causes for these serious failures. The determination of certain engineering properties of the components used in built-up roofing and the complete membrane have received special attention. To determine these properties, a roller-coating technique was developed to prepare membranes and a special grip arrangement was constructed for the tensile studies. These studies were made at 75 F and at -20 F, using two rates of straining. The results emphasize the secondary role of the bitumen in the strength of the membrane. At both temperatures the felts contribute 80 to 90 per cent of the strength of the membrane, although the actual strengths increased by 70 to 250 per cent as the temperature changed from 75 F to -20 F. The small amount of creep and of notch sensitivity also serve to confirm the secondary role of the bitumen.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number8193
NPARC number20375467
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Record identifier216e3a4c-1a86-4d4c-85ad-fe725493a840
Record created2012-07-23
Record modified2016-05-09
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