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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... Evaluation of Live Floor Loads and Fire Loads in Modern Office Buildings . 40 cents BSS17 . Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement . 40 cents BSS18 . Smoke and Gases Produced by Burning Aircraft ...
... Evaluation of Live Floor Loads and Fire Loads in Modern Office Buildings . 40 cents BSS17 . Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement . 40 cents BSS18 . Smoke and Gases Produced by Burning Aircraft ...
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... evaluation . a . b . Felt - base specimens . Aluminum - base specimens . Progress of deterioration .. 3.1 . Smooth - surface specimens . Granule - surfaced specimens . 3.2 . 3.3 . Blistering . 4 . Failure criteria . 5 . Outdoor ...
... evaluation . a . b . Felt - base specimens . Aluminum - base specimens . Progress of deterioration .. 3.1 . Smooth - surface specimens . Granule - surfaced specimens . 3.2 . 3.3 . Blistering . 4 . Failure criteria . 5 . Outdoor ...
Page 1
... 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 ( outdoor ...
... 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 ( outdoor ...
Page 6
... Evaluation a . Felt - Base Specimens The 47 - in exposed portions of the specimens were examined through a transparent grid with 98 squares [ 0.40 × 0.40 in ] covering the central 31⁄44- 614 - in area . The areas around the edges ...
... Evaluation a . Felt - Base Specimens The 47 - in exposed portions of the specimens were examined through a transparent grid with 98 squares [ 0.40 × 0.40 in ] covering the central 31⁄44- 614 - in area . The areas around the edges ...
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... Evaluation - Building Research - Instrument Shops - Meas- urement Engineering - Electronic Technology - Technical Analysis . THE CENTER FOR RADIATION RESEARCH engages in research , measurement , and ap- plication of radiation to the ...
... Evaluation - Building Research - Instrument Shops - Meas- urement Engineering - Electronic Technology - Technical Analysis . THE CENTER FOR RADIATION RESEARCH engages in research , measurement , and ap- plication of radiation to the ...
Common terms and phrases
15 cents 60 percent silica aluminum-base specimens ARIB ASTM method automatic data processing back-coated Black Slate 25 blistering Blue Black Slate Building Science Series Bureau of Standards California asphalt Cement and Concrete Coating composition Thickness Coating thickness Composition Column 1 Column Composition Coating thickness Concrete Properties cracking and spalling doctor bar Dolomite 25 35 embedding rolls felt-base specimens Fly Ash 25 Fly Ash 50 granule-surfaced specimens Greenfeld increased the durability Institute for Applied Interrelations Between Cement Isopropyl alcohol Kraft paper Lake Erie Loss on ignition losses of granules Mica Mid-Continent asphalt mineral additives months of exposure Months Ratio Months National Bureau outdoor exposures performances Portland Cement Ratio Months Ratio saturated felt shingle smooth-surface specimens specimens after 15 specimens exposed outdoors Stabilized Asphalt Coatings straight asphalt surface specimens tabs thickness Composition Coating thickness mils mils three asphalts type of specimen U.S. Government Printing Venezuela asphalt Viscosity weatherometer tests