Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic Felt |
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Page 1
The results of the laboratory evaluation . become available in a relatively short period of time ; those of the simulated - service tests ( outdoor exposures ) get lost in the shuffle and the validity of the rapid tests is never proven ...
The results of the laboratory evaluation . become available in a relatively short period of time ; those of the simulated - service tests ( outdoor exposures ) get lost in the shuffle and the validity of the rapid tests is never proven ...
Page 6
After short periods of exposure , the surfaces became glossy . Continued exposure produced eleva- ted ridges , followed by thinner connecting ridges . These ridges were the result of expansion of the surface as it became oxidized .
After short periods of exposure , the surfaces became glossy . Continued exposure produced eleva- ted ridges , followed by thinner connecting ridges . These ridges were the result of expansion of the surface as it became oxidized .
Page 7
Changes observed early in the exposure period consisted of small losses of granules in most of the specimens and heavier losses of granules in the few specimens in which poor granule adhesion was measured prior to exposure .
Changes observed early in the exposure period consisted of small losses of granules in most of the specimens and heavier losses of granules in the few specimens in which poor granule adhesion was measured prior to exposure .
Page 8
These occurred very early in the exposure period , in some instances during the first winter , but the specimens continued to perform well for many years . There was no relationship between any of the levels of cracking and spalling .
These occurred very early in the exposure period , in some instances during the first winter , but the specimens continued to perform well for many years . There was no relationship between any of the levels of cracking and spalling .
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Common terms and phrases
60 percent aluminum aluminum-base specimens appearance Applied areas asphalt coatings ASTM base Black Slate 25 blistering Blue Black Slate Building Building Science Series Bureau of Standards California asphalt Cement Center cents Characteristics Clay Column COMMERCE concentrations consists containing corresponding cracking criteria deterioration differences direction divisions doctor bar Dolomite durability early effects exposed exposure failed failure felt-base specimens FIGURE Fly Ash Government granule-surfaced specimens granules grid half heated industry Institute Kraft paper listed longer Loss on ignition losses machine materials measurement method Mica Mid-Continent asphalt mils mineral additives Months Ratio Months National Bureau observed Office Organic panel passed performances period physical prepared procedure produced Properties provides Ratio Months Ratio reference reported Research rolls roofing saturated felt sheets shingle Silica smooth smooth-surface smooth-surface specimens spalling surface TABLE technical Technology temperature tests three asphalts Venezuela asphalt Washington weather weatherometer tests
Bibliographic information
| Title | Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic Felt Volume 24 of Building science series, United States National Bureau of Standards, ISSN 0083-1794 |
| Author | Sidney H. Greenfeld |
| Publisher | U.S. National Bureau of Standards, 1969 |
| Original from | the University of Michigan |
| Digitized | 18 Aug 2006 |
| Length | 15 pages |
| Export Citation | BiBTeX EndNote RefMan |