Replacement of asphalt in glass-mat roofing shingles. Final report, March 1980-March 1982
Up to 50% of the asphalt now used in glass-mat shingles may be replaceable by increasing the mineral filler content and/or extending the asphalt with elemental sulfur. Highly filled, lab-made shingles containing asphalt flux perform acceptably in fire tests, slide tests, blister tests, granule adhesion, and freeze-thaw cracking tests. They have high stain and scuff potential and are too limp for convenient application around 110/sup 0/F. Lab-made shingles containing asphalt saturant are satisfactory in most respects, but they are still too limp for high temperature application. Various methods to stiffen highly filled shingles were tried. The most promising method is the use of two lightweight glass mats, laminated together with asphalt. Shingles made in this way have handling properties superior to conventional shingles and are economically feasible. In the area of replacement of asphalt with sulfur, five small-scale plant trials produced shingles which, after a year of outdoor exposure, are satisfactory. On the basis of preliminary measurements, no important difference in tensile or flexural properties between asphalt and sulfur/asphalt shingles is expected. In Weather-Ometer tests, sulfur/asphalt tends to have lower durability than conventional coating. This is confirmed by outside weathering of sulfur/asphalt films. By choosing the correct asphalt softening point and correct filler level, sulfur/asphalt/filler can have equal durability to conventional asphalt/filler combinations.
- Research Organization:
- GAF Corp., South Bound Brook, NJ (USA)
- DOE Contract Number:
- AC01-80CS40445
- OSTI ID:
- 6632387
- Report Number(s):
- DOE/CS/40445-T1; ON: DE82020318
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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BUILDING MATERIALS
FABRICATION
MATERIALS TESTING
ROOFS
ASPHALTS
FILLERS
FLEXIBILITY
SULFUR
WEATHERING
BITUMENS
ELEMENTS
MATERIALS
MECHANICAL PROPERTIES
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
TAR
TENSILE PROPERTIES
TESTING
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