Assessment of the Impact of Accelerated Aging on the Service Life of Bituminous Waterproofing Sheets
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 12
Abstract
It is not surprising that there has been a considerable increase in recent years in the number of research activities on the scientific and applicative level devoted to analyses of accelerated aging, determination of service life, and life-cycle assessment of constructional complexes. The primary objective of the research was to define the theoretical base supporting measurements of accelerated testing and the connection between aging and the service life of bituminous sheets. The Arrhenius law of accelerated testing as a theoretical support to experimental testing of bituminous sheets at high temperature and different exposure times was used. The current procedure of accelerated aging of bituminous sheets in accordance with European Norms (EN) takes 24 weeks at a testing temperature of . The test procedure is fairly long and takes place at a relatively low temperature, which does not represent a significant thermal load in the aging of the majority of bituminous products. According to our measurements and calculations, a shortened testing time of accelerated aging of 12 weeks requires an equivalent aging temperature of for oxidized bituminous products, for atactic polypropylene (APP)-modified bitumen and for styrene-butadiene-styrene (SBS)-modified bitumen products, to achieve the same impact of accelerated aging on bituminous sheets, because it provides testing procedures according to the standard. These results are useful to control quality, test resistance to aging, and determine the life expectancy of bituminous products, the characteristics of which are determined in a significantly shorter time.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 12 • December 2011
Pages: 1746 - 1754
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Aug 19, 2009
Accepted: Apr 18, 2011
Published online: Apr 20, 2011
Published in print: Dec 1, 2011
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