SYMPOSIA PAPER Published: 01 January 1980
STP36107S

Durability of Stabilized Roofing Asphalt—An Investigation of Weather-Ometer Versus Outdoor Exposure

Source

An investigation was undertaken of commercially feasible methods of improving the durability of asphalt roofing shingles in the harsh environment of the southern United States. Two methods of investigation were used: Weather-Ometer exposures of coating asphalts and outdoor exposures of duplicate Weather-Ometer panels. New techniques were introduced to investigate degradation including optical microscopy and scanning electron microscopy (SEM). Systems investigated included four kinds of stabilizers and two asphalts. Identical test panels were exposed in the Weather-Ometer and outdoors in Tampa, Florida, yielding a tentative correlation between them. Controlled experimentation was supplemented by field inspections of actual roofs for periods ranging from 1 to 20 years, these exposures yielding evidence of correlation with the Weather-Ometer. Results of these investigations provided a basis for selecting one stabilizer as significantly better than all others.

Author Information

Davis, DA
Research and Development, GAF Corporation, South Bound Brook, N.J.
Bastian, EJ
Research and Development, GAF Corporation, South Bound Brook, N.J.
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Details
Developed by Committee: G03
Pages: 767–778
DOI: 10.1520/STP36107S
ISBN-EB: 978-0-8031-4768-3
ISBN-13: 978-0-8031-0325-2