Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic Felt |
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Page 6
The num- bers of squares with cracks and spalled coating were counted and recorded during each inspection . In- spections were made every three months during the ... Only failures by cracking were recorded for this type of specimens .
The num- bers of squares with cracks and spalled coating were counted and recorded during each inspection . In- spections were made every three months during the ... Only failures by cracking were recorded for this type of specimens .
Page 7
About a quarter of the specimens had cracks in 5 percent of their surface areas ( five grid areas ) after 12 and a half ... generally more granules will be lost , more cracking will occur and , finally , the coatings will spall off the ...
About a quarter of the specimens had cracks in 5 percent of their surface areas ( five grid areas ) after 12 and a half ... generally more granules will be lost , more cracking will occur and , finally , the coatings will spall off the ...
Page 8
25 % Cracked 50 % Cracked Coating description Initial Spall 25 % Spalled 50 % Spalled Months Ratio Months Ratio Months Ratio Months Ratio Months Ratio 2 201 60 17 17 23 20 ********** | * = * DIFER * CA8AA8 | FEE NZ82278885 1.0 15 .
25 % Cracked 50 % Cracked Coating description Initial Spall 25 % Spalled 50 % Spalled Months Ratio Months Ratio Months Ratio Months Ratio Months Ratio 2 201 60 17 17 23 20 ********** | * = * DIFER * CA8AA8 | FEE NZ82278885 1.0 15 .
Page 9
25 % Cracked Coating description 50 % Cracked Initial Spall 25 % Spalled 50 % Spalled Months Ratio Months Ratio Months Ratio Months Ratio Months Ratio California Asphalt . + 35 % BBS . + 50 % BBS . + 60 % BBS . +359 Clay % + 50 % Clay .
25 % Cracked Coating description 50 % Cracked Initial Spall 25 % Spalled 50 % Spalled Months Ratio Months Ratio Months Ratio Months Ratio Months Ratio California Asphalt . + 35 % BBS . + 50 % BBS . + 60 % BBS . +359 Clay % + 50 % Clay .
Page 10
The unstabilized asphalt coatings show noticeable losses of granules and cracking of the coatings . Cracking of the coatings is also evident in the California coatings containing clay . However , all of the gran- ule - surfaced ...
The unstabilized asphalt coatings show noticeable losses of granules and cracking of the coatings . Cracking of the coatings is also evident in the California coatings containing clay . However , all of the gran- ule - surfaced ...
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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 |