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 ... These were exposed with coating thick- nesses of 15 and 25 mils , were back - coated with the same coating blend ...
Six finely divided mineral additives ( blue black slate , clay , dolomite , fly ash , mica , and silica ) were ... These were exposed with coating thick- nesses of 15 and 25 mils , were back - coated with the same coating blend ...
Page 8
25 % Cracked 50 % Cracked Coating description Initial Spall 25 % Spalled 50 % Spalled Months Ratio Months Ratio Months ... containing blue black slate have not deteriorated to the 25 per- cent spalled level after 17 years of exposure .
25 % Cracked 50 % Cracked Coating description Initial Spall 25 % Spalled 50 % Spalled Months Ratio Months Ratio Months ... containing blue black slate have not deteriorated to the 25 per- cent spalled level after 17 years of exposure .
Page 9
Smooth surface specimens 1 25 Mil ( 0.64 mm ) Thickness Outdoor Exposures Specimens have not progressed to this failure level after 200 months of ... black slate are deteriorating more slowly than those with lower concentrations .
Smooth surface specimens 1 25 Mil ( 0.64 mm ) Thickness Outdoor Exposures Specimens have not progressed to this failure level after 200 months of ... black slate are deteriorating more slowly than those with lower concentrations .
Page 10
... specimens were more variable than those of blue black slate , fly ash , and mica . The silica was most beneficial in the Cali- fornia asphalt , for it increased its durability ( 25 percent coating spalled ) as much as 80 percent .
... specimens were more variable than those of blue black slate , fly ash , and mica . The silica was most beneficial in the Cali- fornia asphalt , for it increased its durability ( 25 percent coating spalled ) as much as 80 percent .
Page 11
... 15 60 % Blue Black Slate 15 35 % Fly Ash 15 50 % Fly Ash 15 60 % Blue Black Slate 25 35 % Fly Ash 25 50 % Fly Ash 25 60 % Blue Black Slate 25 35 % Fly Ash 25 50 % Fly Ash 25 1 Mid - Continent Asphalt . 2 Tabs partially torn off .
... 15 60 % Blue Black Slate 15 35 % Fly Ash 15 50 % Fly Ash 15 60 % Blue Black Slate 25 35 % Fly Ash 25 50 % Fly Ash 25 60 % Blue Black Slate 25 35 % Fly Ash 25 50 % Fly Ash 25 1 Mid - Continent Asphalt . 2 Tabs partially torn off .
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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 |