ASTM_C_510_-_16.pdf

Designation:C51016Standard Test Method forStaining and Color Change of Single-or MulticomponentJoint Sealants1This standard is issued under the fixed designation C510;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers an accelerated laboratory pro-cedure to determine if a sample of a joint sealant will stain thesubstrate when in contract with masonry,concrete,or stone(such as marble,limestone,sandstone,and granite).This testmethod also is intended to determine whether the sealant itselfwill change in color when exposed to the weather.1.2 The values stated in SI units are to be regarded as thestandard.The value 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:2C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C150 Specification for Portland CementC207 Specification for Hydrated Lime for Masonry Pur-posesC717 Terminology of Building Seals and SealantsC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusD2203 Test Method for Staining from SealantsG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic Materials3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,see Terminology C717 for terms relating to buildingseals and sealants,and Terminology G113 for terms relating tonatural and artificial weathering tests.4.Significance and Use4.1 Staining of a building is an aesthetically undesirableoccurrence.This test method evaluates the likelihood of asealant causing early stain on a porous substrate due to certainchemical exudations from the sealant.4.1.1 This test method may not predict staining caused bysuch factors as residue run-down or dirt pick-up by a sealantexudate.4.2 This test method is useful to predict potential colorchanges in the sealant itself after weathering.4.3 This test method measures color change in a sealant andstaining of substrate by the sealant under conditions of artificialweathering.See also Test Method D2203,which measuresstaining by a sealant due to gross exudations from the sealant;it does not subject the sealant to artificial weathering.5.Apparatus5.1 The exposure apparatus shall be one of the three types oflaboratory accelerated weathering devices described in PracticeC1442,that use either xenon arc,fluorescent UV or open flamecarbon arc radiation.Consult Practice C1442 for the differ-ences in test parameters among the devices.Because ofdifferences in test conditions,test results may differ with thetype of device used.The choice of device shall be by mutualagreement among the interested parties.6.Materials6.1 Portland Cement,white,nonstaining,conforming toType I of Specification C150.6.2 Hydrated Lime,conforming to Type S of SpecificationC207.6.3 Ottawa Sand,graded,white,conforming to the require-ments of Section 4 of Test Method C109/C109M.6.4 Aluminum Plates,eight 152 by 70-mm(6 by 234-in.),No.16 gage.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.40 onWeathering.Current edition approved Aug.1,2016.Published September 2016.Originallyapproved in 1963.Last previous edition approved in 2011 as C510 05a(2011).DOI:10.1520/C0510-16.2For referenced 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.5 Metal Frames,two rectangular noncorrosive,designatedas A and B;frame A shall be 6 mm(14in.)thick with the insideopening slightly larger than an aluminum plate described in6.4;frame B shall have inside dimensions of 127 by 38 by 6mm(5 by 112by14in.)thick.7.Test Specimens7.1 The test specimen shall consist of a slab of mortar mixupon which is placed a layer of sealant.Prepare a minimum ofeight specimens,four of which are then covered with sealant.7.2 The mortar mix shall be prepared by combining,byweight,1 part white portland cement,0.25 part hydrated lime,and 4 parts graded Ottawa sand,with sufficient water to makea smooth,workable paste(water-cement ratio=0.8).7.3 The mortar mix shall be spread,with the aid of frame A,over the entire surface of each of the aluminum plates to adepth approximately