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Title
The use of nondestructive methods for inspection of single ply roofing membranes
The use of nondestructive methods for inspection of single ply roofing membranes
Date
0/1986
0/1986
Author(s)
Walter Rossiter; James Clifton
Walter Rossiter; James Clifton
Page(s)
343-352
343-352
Source
Elseview Science Publishers
Elseview Science Publishers
Keyword(s)
nondestructive test; NDT; single pliy; ultrasonic pulse; infrared thermography
nondestructive test; NDT; single pliy; ultrasonic pulse; infrared thermography
Abstract
This laboratory study investigated theuse of the ultrasonic pulse echo method and the infrared thermography method to detect voids and delaminations nondestructively in seams of single ply roofing membranes. Voids were intentionaly incorporated in seam specimens prepared using a commercially available EPDM roofing membrane material. A number of factors affecting the response of the nondestructive evaluation methods was examined, including: pressure applied during seam fabrication, void size, water in the void, temperature, unbonded seam interfaces, and supporting panel under the seam. The results indicated that both NDE methods were successful under certain laboratory conditions in locating hidden voids and delaminations in the seam specimens. Both the ultrasonic pulse echo and the infrared thermography methods need further research before their reliability in locating defects is ascertained andtheir results can be more fuly interpreted.
This laboratory study investigated theuse of the ultrasonic pulse echo method and the infrared thermography method to detect voids and delaminations nondestructively in seams of single ply roofing membranes. Voids were intentionaly incorporated in seam specimens prepared using a commercially available EPDM roofing membrane material. A number of factors affecting the response of the nondestructive evaluation methods was examined, including: pressure applied during seam fabrication, void size, water in the void, temperature, unbonded seam interfaces, and supporting panel under the seam. The results indicated that both NDE methods were successful under certain laboratory conditions in locating hidden voids and delaminations in the seam specimens. Both the ultrasonic pulse echo and the infrared thermography methods need further research before their reliability in locating defects is ascertained andtheir results can be more fuly interpreted.