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). |
From inside the book
Results 1-5 of 9
Page
... Test Mortars and Steam - Cured Mortars . 55 cents BSS9 . Thermal - Shock Resistance for Built - Up Membranes . 20 cents BSS10 . Field Burnout Tests of Apartment Dwelling Units . 25 cents BSS11 . Fire Resistance of Steel Deck Floor ...
... Test Mortars and Steam - Cured Mortars . 55 cents BSS9 . Thermal - Shock Resistance for Built - Up Membranes . 20 cents BSS10 . Field Burnout Tests of Apartment Dwelling Units . 25 cents BSS11 . Fire Resistance of Steel Deck Floor ...
Page 1
... tests ( outdoor exposures ) get lost in the shuffle and the validity of the rapid tests is never proven . This study was designed in 1947 by the Research Committee of the Asphalt Roofing Manufacturers Association to include a simulated ...
... tests ( outdoor exposures ) get lost in the shuffle and the validity of the rapid tests is never proven . This study was designed in 1947 by the Research Committee of the Asphalt Roofing Manufacturers Association to include a simulated ...
Page 2
... tests were reported earlier [ 3 ] . 2.2 . Equipment for Preparation of Specimens a . Smooth - Surface , Felt - Base ... Test Panels for Ac- celerated and Outdoor Weathering of Bituminous Coatings [ 1 ] and in reference [ 3 ] . 2.3 ...
... tests were reported earlier [ 3 ] . 2.2 . Equipment for Preparation of Specimens a . Smooth - Surface , Felt - Base ... Test Panels for Ac- celerated and Outdoor Weathering of Bituminous Coatings [ 1 ] and in reference [ 3 ] . 2.3 ...
Page 4
... Test Softening point 1 . ° F ( ° C ) -- 223 ( 106.0 ) 224 ( 106.5 ) 227 ( 107.8 ) Penetration at 32 ° F ( 0 ° C ) 2 . 0.1 mm . 10 11 11 Penetration at 77 ° F ( 25 ° C ) . 0.1 mm . 17 17 14 Penetration at 115 ° F ( 46.1 ° C ) . .0.1 mm ...
... Test Softening point 1 . ° F ( ° C ) -- 223 ( 106.0 ) 224 ( 106.5 ) 227 ( 107.8 ) Penetration at 32 ° F ( 0 ° C ) 2 . 0.1 mm . 10 11 11 Penetration at 77 ° F ( 25 ° C ) . 0.1 mm . 17 17 14 Penetration at 115 ° F ( 46.1 ° C ) . .0.1 mm ...
Page 5
... test asphalt was in the range of 400 to 450 ° F ( 204 to 232 ° C ) , any required mineral matter , pre- heated to 300 ° F ( 149 ° C ) , was stirred into it with a large chromium - plated ladle . The mixture was continually stirred at ...
... test asphalt was in the range of 400 to 450 ° F ( 204 to 232 ° C ) , any required mineral matter , pre- heated to 300 ° F ( 149 ° C ) , was stirred into it with a large chromium - plated ladle . The mixture was continually stirred at ...
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