1、Designation:D 529 04Standard 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 numb
2、er 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 enc
3、losed 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.(See also Terminology G 113.)1.2 The values stated in SI units are to be regard
4、ed 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 th
5、e applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D 36 Test Method for Softening Point of Bitumen(Ring-and-Ball Apparatus)D 1669 Practice for Preparation of Test Panels for Acceler-ated and Outdoor Weathering of Bituminous CoatingsD 1670 Test Method fo
6、r Failure End Point in Acceleratedand Outdoor Weathering of Bituminous MaterialsG 113 Terminology Relating to Natural and ArtificialWeathering Tests of Nonmetallic MaterialsG 141 Guide forAddressing Variability in Exposure Testingof Nonmetallic MetalsG 147 Practice for Conditioning and Handling of N
7、onme-tallic Materials for Natural and Artificial Weathering TestsG 151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test Devices That Use Laboratory Light SourcesG 153 Practice for Operating Enclosed Carbon-Arc LightApparatus for Exposure of Nonmetallic Materials3.Summary of Practice3
8、.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.Signifi
9、cance 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 character
10、is-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 Unl
11、ess 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 57
12、8in.).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 weig
13、ht 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.1This practice is under the jurisdiction ofASTM Committe
14、e D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.02 on PreparedRoofings,Shingles,and Siding Materials.Current edition approved Nov.1,2004.Published November 2004.Originallyapproved in 1939.Last previous edition approved in 2000 as D 529 00.2For referenced ASTM s
15、tandards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 194
16、28-2959,United States.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,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 por
