ISSN: 0090-3973
Page Count: 5

Measurement of Granule Coverage on Bituminous Roofing Surfaces
Dutt, O
Research Scientist, Division of Building Research, National Research Council of Canada, Ontario

Abstract

Methods were developed to measure the exposed area of bitumen on a granule-covered roofing surface. They included traverse microscopical examination, image analysis technique, and photometric measurements. Three specially prepared samples were tested for granule coverage. One of the samples was further tested for the exposed area of bitumen after progressively removing granules from its surface. The study showed that the exposure of bitumen could be related to the loss of granules.

Keywords:
bitumen exposure, bituminous surface, granular protection, granule loss, image analyzer, linear traverse, photometers, roofing

Paper ID: JTE11398J
DOI: 10.1520/JTE11398J
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