ASTM_D_529_-_00.pdf

Designation:D 529 00Standard Practice forEnclosed Carbon-Arc Exposures of Bituminous Materials1This standard is issued under the fixed designation D 529;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This practice describes test conditions and proceduresfor enclosed carbon-arc exposures conducted according toPractices G 151 and G 153 for bituminous roofing and water-proofing materials that have a minimum softening point ofapproximately 95C(200F)as determined by Test MethodD 36.(Also see Terminology G 113.)1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 36 Test Method for Softening Point of Bitumen(Ring-and-Ball Apparatus)2D 1669 Practice for Preparation of Test Panels for Acceler-ated and Outdoor Weathering of Bituminous Coatings2D 1670 Test Method for Failure End Point in Acceleratedand Outdoor Weathering of Bituminous Materials2G 113 Terminology Relating to Natural and ArtificialWeathering Tests of Nonmetallic Materials3G 141 Guide forAddressing Variability in Exposure Testingof Nonmetallic Metals3G 147 Practice for Conditioning and Handling of Nonme-tallic Materials for Natural andArtificial Weathering Tests3G 151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test Devices That Use Laboratory LightSources3G 153 Practice for Operating Enclosed Carbon-Arc LightApparatus for Exposure of Nonmetallic Materials33.Summary of Practice3.1 Thin films of bitumen are uniformly applied to alumi-num panels.Shingles and similar products are cut to size andexposed to specified cycles of temperature,light,and water.Achoice of two test cycles is given along with options fordetermining the period of exposure and evaluating results.4.Significance and Use4.1 It is not possible to establish a precise correlationbetween accelerated and natural weathering because of geo-graphical climatic variations,local weather variation fromnormal,and local pollutants.This weathering apparatus andprocedure are used for comparing the weathering characteris-tics of bituminous materials against a reference material forwhich the outdoor weathering characteristics are known.GuideG 141 provides guidance regarding this issue.5.Apparatus5.1 The enclosed carbon-arc apparatus used shall conformto the requirements defined in Practices G 151 and G 153.5.2 Unless otherwise specified,the spectral power distribu-tion of the enclosed carbon-arc shall conform to the require-ments in Practice G 153 for enclosed carbon-arc with borosili-cate glass globes.6.Test Specimens6.1 Unless otherwise agreed upon,test specimens shall beapproximately 70 by 150 mm(234by 578in.).Bituminousmaterials shall be applied as uniform coatings on aluminumpanels in accordance with Practice D 1669.Fabricated materi-als such as bituminous roofing,shingles,and similar productsshall be cut to size and their weather surfaces exposed.If theseare too flexible to sustain their own weight in a verticalposition,they may be mounted on aluminum panels.6.1.1 At least two test specimens of each material shall beexposed.6.1.2 Other test specimen sizes may be used to providesufficient material for post-exposure testing when desired.6.2 Unless otherwise specified,expose at least three repli-cate specimens of each test and control material.6.3 Follow the procedures described in Practice G 147 foridentification,conditioning,and handling of specimens of test,1This practice is under the jurisdiction of ASTM Committee D08 on Roofing,Waterproofing,and Bituminous Materials and is the direct responsibility ofSubcommittee D08.02 on Prepared Roofings,Shingles,and Siding Materials.Current edition approved Jan.10,2000.Published March 2000.Originallypublished as D 529 39 T.Last previous edition D 529 92(1996).2Annual Book of ASTM Standards,Vol 04.04.3Annual Book of ASTM Standards,Vol 14.04.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.control,and reference materials prior to,during,and afterexposure.6.4 Do not mask the face of a specimen for the purpose ofshowing on one panel the effects of various exposure times.Misleading results may be obtained by this method,since themasked portion of the specimens is still exposed to temperatureand humidity cycles that in many cases will affect results.7.Procedure7.1 Mount