Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic Felt |
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Page 5
Specimen Preparation Smooth - Surface , Felt - Base Specimens The asphalts were melted in a double - boiler , con- sisting of a one - gallon can , wrapped in aluminum foil to prevent contamination , sitting in a two- gallon bucket half ...
Specimen Preparation Smooth - Surface , Felt - Base Specimens The asphalts were melted in a double - boiler , con- sisting of a one - gallon can , wrapped in aluminum foil to prevent contamination , sitting in a two- gallon bucket half ...
Page 6
About one and a half times the required coating was distributed over the panel . The motor was started and the panel was pulled under the doctor bar ( B ) and granule hopper ( C ) ; then the motor was stopped ...
About one and a half times the required coating was distributed over the panel . The motor was started and the panel was pulled under the doctor bar ( B ) and granule hopper ( C ) ; then the motor was stopped ...
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 years . No spalling of the coatings has been observed in any of these specimens since their exposure in 1952.
About a quarter of the specimens had cracks in 5 percent of their surface areas ( five grid areas ) after 12 and a half years . No spalling of the coatings has been observed in any of these specimens since their exposure in 1952.
Page 14
After 16 and a half years of exposure of smooth- surface and granule - surfaced roofing in Washington , D.C. , the following conclusions can be drawn : ( 1 ) All of the granule - surfaced specimens are per- forming satisfactorily .
After 16 and a half years of exposure of smooth- surface and granule - surfaced roofing in Washington , D.C. , the following conclusions can be drawn : ( 1 ) All of the granule - surfaced specimens are per- forming satisfactorily .
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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 |