Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic Felt |
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Page 1
Six finely divided mineral additives ( blue black slate , clay , dolomite , fly ash , mica , and silica ) were evaluated at concentrations up to 60 percent in California , Mid Continent and Venezuela asphalts .
Six finely divided mineral additives ( blue black slate , clay , dolomite , fly ash , mica , and silica ) were evaluated at concentrations up to 60 percent in California , Mid Continent and Venezuela asphalts .
Page 8
+ 60 % BBS . + 35 % Clay + 50 % Clay . + 35 % Dolomite . + 50 % Dolomite . + 60 % Dolomite . ... that many of the specimens containing blue black slate have not deteriorated to the 25 per- cent spalled level after 17 years of exposure .
+ 60 % BBS . + 35 % Clay + 50 % Clay . + 35 % Dolomite . + 50 % Dolomite . + 60 % Dolomite . ... that many of the specimens containing blue black slate have not deteriorated to the 25 per- cent spalled level after 17 years of exposure .
Page 9
+ 60 % BBS . +359 Clay % + 50 % Clay . + 35 % Dolomite . + 50 % Dolomite . + 60 % Dolomite . ... The Venezuela coatings 25 mils thick with 50 and 60 percent fly ash are just begin- ning to fail , and the California - fly ash coatings ...
+ 60 % BBS . +359 Clay % + 50 % Clay . + 35 % Dolomite . + 50 % Dolomite . + 60 % Dolomite . ... The Venezuela coatings 25 mils thick with 50 and 60 percent fly ash are just begin- ning to fail , and the California - fly ash coatings ...
Page 10
In only a few combinations containing clay or dolomite were improvements in durability of more than 20 percent observed . Fifty percent clay in- creased the durability of the California asphalt in both thicknesses by 60 percent .
In only a few combinations containing clay or dolomite were improvements in durability of more than 20 percent observed . Fifty percent clay in- creased the durability of the California asphalt in both thicknesses by 60 percent .
Page 14
In the extreme cases , such as 60 percent silica in the 15 mil coatings of all three asphalts , the specimens exposed outdoors were more durable than the corresponding straight asphalt specimens and the specimens in the weatherometers ...
In the extreme cases , such as 60 percent silica in the 15 mil coatings of all three asphalts , the specimens exposed outdoors were more durable than the corresponding straight asphalt specimens and the specimens in the weatherometers ...
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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 |