Natural Weathering of Mineral Stabilized Asphalt Coatings on Organic FeltU.S. National Bureau of Standards, 1969 - 15 pages Sixteen years of outdoor weathering of laboratory-prepared smooth-surface and mineral-surfaced, felt-base roofing specimens has provided information on the effects of mineral additives on the durability of coating-grade roofing 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. The mineral-surfaced specimens are all performing satisfactorily, and show only minor degrees of degradation. Of the smooth-surfaced specimens, the Mid-Continent asphalt performed the best and the California asphalt the poorest. The mica and blue black slate increased the durabilities of all three asphalts at all concentrations and two coating thicknesses. Fly ash, clay, dolomite, and silica were beneficial in some combinations, but had little effect in others. In general, these early results from outdoor exposure tend to corroborate the results obtained on these coatings exposed in weatherometers. (Author). |
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... methods , and performance criteria related to the structural and enviornmental functions and the durability and safety char- acteristics of building elements and systems . These publications , similar in style and content to the NBS ...
... methods , and performance criteria related to the structural and enviornmental functions and the durability and safety char- acteristics of building elements and systems . These publications , similar in style and content to the NBS ...
Page 1
... methods for evaluating materials and simul- taneously exposing the same materials to the weather . The results of the laboratory evaluation . become available in a relatively short period of time ; those of the simulated - service tests ...
... methods for evaluating materials and simul- taneously exposing the same materials to the weather . The results of the laboratory evaluation . become available in a relatively short period of time ; those of the simulated - service tests ...
Page 2
... Method for Preparation of Test Panels for Ac- celerated and Outdoor Weathering of Bituminous Coatings [ 1 ] and in reference [ 3 ] . 2.3 . Materials a . Mineral Matter The six minerals used in this investigation were blue black slate ...
... Method for Preparation of Test Panels for Ac- celerated and Outdoor Weathering of Bituminous Coatings [ 1 ] and in reference [ 3 ] . 2.3 . Materials a . Mineral Matter The six minerals used in this investigation were blue black slate ...
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... method D424-39 . ' Isopropyl alcohol displacement . Low temperature nitrogen adsorption - B.E.T . method . ASTM D281-31 , using a mineral oil and water instead of the specified oil . Lerch , W. , and Bogue , R. H. , Ind . Eng . Chem . 2 ...
... method D424-39 . ' Isopropyl alcohol displacement . Low temperature nitrogen adsorption - B.E.T . method . ASTM D281-31 , using a mineral oil and water instead of the specified oil . Lerch , W. , and Bogue , R. H. , Ind . Eng . Chem . 2 ...
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... method D36–26 . ASTM method D5-52 . P. I. from Nomograph , and S = -g / m 2 in ( cm ) ( ave ) – 7.2 6.3 ( 16.0 ) 4.6 8.3 ( 21.1 ) 3.7 2.7 ( 6.9 ) Pen . 115 ° F ( 46.1 ° C ) Pen . 32 ° F ( 0 ° C ) Pen . 77 ° F ( 25 ° C ) - ( 6 ) ASTM ...
... method D36–26 . ASTM method D5-52 . P. I. from Nomograph , and S = -g / m 2 in ( cm ) ( ave ) – 7.2 6.3 ( 16.0 ) 4.6 8.3 ( 21.1 ) 3.7 2.7 ( 6.9 ) Pen . 115 ° F ( 46.1 ° C ) Pen . 32 ° F ( 0 ° C ) Pen . 77 ° F ( 25 ° C ) - ( 6 ) ASTM ...
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