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Abstract
Five different types of seams made of single-ply roofing membranes were investigated for water durability. Test specimens were exposed for a water condition of either distilled, acid or alkaline. Mechanical strength of seams and materials were tested with and without exposure by either tensile test, lap-shear test or T-peel test. Mechanical strength and fracture mechanisms in different tests were discussed. After 6,000 hours of exposure in water, for some products the changes in either mechanical strength or fracture mechanisms of a sample were in some cases related to their mechanical strengths. It is concluded that the long-time exposure of watertight seams to ponding water on flat roofs can cause a decrease in mechanical strength of seams.
Five different types of seams made of single-ply roofing membranes were investigated for water durability. Test specimens were exposed for a water condition of either distilled, acid or alkaline. Mechanical strength of seams and materials were tested with and without exposure by either tensile test, lap-shear test or T-peel test. Mechanical strength and fracture mechanisms in different tests were discussed. After 6,000 hours of exposure in water, for some products the changes in either mechanical strength or fracture mechanisms of a sample were in some cases related to their mechanical strengths. It is concluded that the long-time exposure of watertight seams to ponding water on flat roofs can cause a decrease in mechanical strength of seams.
Date
0/1992
0/1992
Author(s)
Koichi Oba; Folke Bjork
Koichi Oba; Folke Bjork
Page(s)
313-325
313-325
Keyword(s)
mechanical strength; seam strength; fracture mechanism
mechanical strength; seam strength; fracture mechanism