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Field and laboratory investigations of the crazing phenomena of APP modified bitumen Sheetings

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Abstract
Crazing of APP-modified bitumen has been a notorious type of failure in the Netherlands. In close cooperation with the Dutch Roofing Manufacturers Association VENEDAK an extensive field and lab investigation program has been executed about the crazing phenomena with APP-modified bitumen sheetings. The paper describes the results of the field investigation, which leads to a classification of crazing types, supported by fluorescence microscopy analysis. Also, the possible explanations for the crazing phenomena have been analyzed. Furthermore, the first results of a new test method to detect the sensibility to crazing are presented.
Date
0/1992
Author(s)
Nico Hendriks; R Woodnink
Page(s)
177-195
Keyword(s)
crazing; APP modifed bitumen; VENEDAK; Netherlands; fluorescence microscopy analysis


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