ASTM C1501-2014 Standard Test Method for Color Stability of Building Construction Sealants as Determined by Laboratory Accelerated Weathering Procedures《用实验室加速风化程序测定建筑物密封材料颜色稳定性的标准.pdf
《ASTM C1501-2014 Standard Test Method for Color Stability of Building Construction Sealants as Determined by Laboratory Accelerated Weathering Procedures《用实验室加速风化程序测定建筑物密封材料颜色稳定性的标准.pdf》由会员分享,可在线阅读,更多相关《ASTM C1501-2014 Standard Test Method for Color Stability of Building Construction Sealants as Determined by Laboratory Accelerated Weathering Procedures《用实验室加速风化程序测定建筑物密封材料颜色稳定性的标准.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C1501 14Standard Test Method forColor Stability of Building Construction Sealants asDetermined by Laboratory Accelerated WeatheringProcedures1This standard is issued under the fixed designation C1501; the number immediately following the designation indicates the year oforiginal adoptio
2、n or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method describes laboratory acceleratedweathering procedures usin
3、g either fluorescent ultraviolet orxenon arc test devices for determining the color stability ofbuilding construction sealants.1.2 Color stability rankings provided by these two proce-dures may not agree.1.3 The values stated in SI units are to be regarded as thestandard. Values given in parentheses
4、 are for information only.1.4 There is no equivalent ISO standard for this test method.1.5 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
5、and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and SealantsC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusD1729 Practice for Visual Appraisal of Colors and Colo
6、rDifferences of Diffusely-Illuminated Opaque MaterialsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesE284 Terminology of AppearanceE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE17
7、7 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic MaterialsG151 Practice for Exposing Nonmetallic Materials in Accel-era
8、ted Test Devices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultraviolet (UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 CIE Documents:CIE Publication Number 85: 1989,
9、Technical Report-SolarSpectral Irradiance33. Terminology3.1 DefinitionsDefinitions of the following terms arefound in Terminology C717: standard conditions, compound,cure, sealant, and substrate. Definitions of the following termsare found in Terminology G113: sample, file specimen, controlmaterial,
10、 fluorescent ultraviolet lamps, xenon arc, irradiance,radiant exposure, spectral power distribution, solar radiation-ultraviolet, solar radiation-visible.4. Summary of Test Method4.1 Specimens for this procedure are prepared in which thesealant to be tested adheres to flat aluminum panels. While any
11、surface can be specified and used, this test method wasdeveloped with aluminum panels. At least four replicates ofeach sealant being tested are required. After curing, onereplicate of each sealant being tested is retained as a filespecimen and at least three replicates are exposed to actinicradiatio
12、n, heat and moisture.At the end of the exposure period,the test sealant is examined for color change by comparison tothe unexposed file specimen.4.2 As recommended in Practice G151 Section 4.2, unlessseveral test sealants are exposed to determine their relative1This test method is under the jurisdic
13、tion ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.40 onWeathering.Current edition approved June 1, 2014. Published July 2014. Originally approvedin 2001. Last previous edition approved in 2009 as C150109. DOI: 10.1520/C1501-14.2For reference
14、d ASTM standards, 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.3CIE Central Bureau, Vienna, Kegelgasse 27, A-1030 Wien, AustriaCopyright A
15、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1color stabilities, one or two control sealants of similar compo-sition and construction to the test specimen and having knowncolor stability should be exposed simultaneously with the testspecimen t
16、o rank the color stability of the latter compared withthe color stability of the control(s).5. Significance and Use5.1 This test method is intended to induce color changes insealants, as well as their constituent pigments, associated withend-use conditions, including the effects of sunlight, moistur
17、e,and heat. The exposures used in this test method are notintended to simulate the color change of a sealant caused bylocalized weathering phenomena, such as atmosphericpollution, biological attack, and saltwater exposure.5.2 When conducting exposures in devices that use labora-tory light sources, i
18、t is important to consider how well theartificial test conditions will reproduce property changes andfailure modes associated with end-use environments for thesealant being tested. Information on the use and interpretationof data from accelerated exposure tests is provided in PracticeG151.5.3 When t
19、his test method is used as part of a specification,exact procedure, test conditions, test duration and evaluationtechnique must be specified. Results obtained between the twoprocedures may vary, because the spectral power distributionof the light sources (fluorescent UV and xenon arc) differ.Sealant
20、s should not be compared to each other based on theresults obtained in different types of apparatus.5.4 These devices are capable of matching ultraviolet solarradiation reasonably well. However, for sealants sensitive tolong wavelength UV and visible solar radiation, the absence ofthis radiation in
21、the fluorescent UV apparatus can distort colorstability ranking when compared to exterior environmentexposure.NOTE 1Refer to Practice G151 for full cautionary guidance regardinglaboratory weathering of non-metallic materials.6. Apparatus6.1 Aluminum PanelsApply sealant to four aluminumpanels, alloy
22、3003 H14, dimensions, 152 mm by 76 mm by0.64 mm thick (6 by 3 by 0.025 in. thick), using rectangularBrass Frame described in 6.3. Other substrate materials areacceptable when specified.6.2 Spatula, steel, about 150 mm (6 in.) long.6.3 Rectangular Brass Frame, with outside dimensions ofapproximately
23、152 mm by 76 mm, and inside dimensions 75mm by 65 mm by 3.0 mm (3 in. long by 2.5 in. wide by 0.125in. deep).6.4 Thin Bladed Knife.6.5 Color Evaluation Apparatus:6.5.1 Lighting Equipment, to evaluate color difference ac-cording to Practice D1729 or,6.5.2 Spectrophotometer, complying with Practice E1
24、164;or,6.5.3 Colorimeter, complying with Test Method D2244.6.6 Cleaning Solvent, isopropyl alcohol.6.7 Test ChamberChoice of type of apparatus shall be bymutual agreement among the interested parties. Because ofdifferences in test conditions, test results may differ with thetype of apparatus used. C
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