1、Designation: D2203 01 (Reapproved 2011)Standard Test Method forStaining from Sealants1This standard is issued under the fixed designation D2203; 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
2、 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 a laboratory procedure fordetermining whether a sample of sealant will cause staining ofthe substrate when in the contac
3、t with masonry, concrete, orstone (marble, limestone, sandstone, granite, etc.).1.2 The values stated in SI (metric) units are to be regardedas the standard. The values given in parentheses are providedfor information only.1.3 This standard does not purport to address all of thesafety problems, if a
4、ny, 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.NOTE 1Currently there is no ISO standard similar to this test method.2. Referenced Documents
5、2.1 ASTM Standards:2C510 Test Method for Staining and Color Change of Single-or Multicomponent Joint SealantsC717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof the following terms used in this test method: compound,sealant, substra
6、te.4. Significance and Use4.1 Staining of a building is an aesthetically undesirableoccurrence. This test method evaluates the likelihood of asealant causing an early stain on a porous substrate, when thestain is caused by gross exudation from the sealant. This testmethod does not predict staining c
7、aused by other factors.4.2 See also Test Method C510.5. Apparatus and Materials5.1 Convection Oven, having a temperature controlled at104.5 6 3C (220 6 5F).5.2 Brass Ring,19mm(34 in.) inside diameter, 19 mm (34in.) high, walls at one end beveled to a minimum diameter.5.3 Filter Paper, ten sheets, hi
8、gh-grade, rapid, qualitative 9cm in diameter.35.4 Aluminum Foil, household-type, 25.4 mm (1 in.) square.5.5 Weight, 300-g.5.6 Spatula, small, thin, steel.5.7 Glass Plate, at least 100 by 100 mm (4 by 4 in.).5.8 Desiccator, with drying agent.6. Sampling6.1 Take the test specimen from a previously uno
9、penedcontainer and thoroughly mix before using, if required forhomogeneity.7. Conditioning7.1 Condition the sample in a closed container for at least 5hat236 2C (73.4 6 3.6F).8. Procedure8.1 Dry the filter papers for 5 to8hinanoven maintainedat 104.5 6 3C (220 6 5.4F).At the end of the drying period
10、,remove from the oven and store in a desiccator until cool.8.2 Remove ten filter papers from the desiccator, staplethem together, and place them on a glass plate. Set the brassring with beveled edge down on the center of the filter papers.Fill the ring flush with thoroughly mixed sealant, taking car
11、e toincorporate as little air as possible with the compound. Place a25.4-mm (1-in.) square piece of aluminum foil on top of thering, and the 300-g weight on top of that.8.3 Allow the filled ring to stand for 72 h at 23 6 2C (73.46 3.6F). Then slide a spatula under the brass ring and removethe ring a
12、nd compound. Hold the top filter paper up to the lightwith a glass plate under it and, with a sharp pencil, mark themaximum and minimum diameters of the stain. Measure thesediameters to the nearest 0.5 mm. Subtract 19 (diameter of ring1This test method is under the jurisdiction ofASTM Committee C24
13、on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved June 1, 2011. Published August 2011. Originallyapproved in 1963. Last previous edition approved in 2007 as D2203 01(2007).DOI: 10.1520/D2203-01R11.2For referenced AST
14、M 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.3This test method is based on the use of Whatman No. 1 filter paper,manufactured
15、 by Whatman, Inc., 9 Bridewell Place, Clifton, NJ 07073.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.in millimetres) from the average of the two diameters anddivide by 2. Record this result as width of stain. (Width ofstain = (ave
16、rage 19)/2).8.4 Examine the ten individual papers for depth of stain byholding them up to a light. Record the number of papers,including the first one, showing any evidence of staining asnumber of papers stained.8.5 Report the sum of width of stain and number of papersstained as the stain index.9. A
17、lternative Procedure9.1 If the sample or compound to be tested is accompaniedby a sample block of masonry (brick, marble, limestone, etc.)on which it is to be used, the standard procedure shall bewaived and the following alternative test used in its place:9.1.1 Dry duplicate specimens of the masonry
18、 sample (89by 89 by 19 mm (312 by 312 by34 in.) in an oven at 104.5 63C (220 6 5.4F) for 24 h and cool to room temperature.9.1.2 Place a round pat of the material to be tested, 38 mm(112 in.) in diameter, and about 6.5 mm (14 in.) high on thesurface of each block. Expose the blocks in air for 5 days
19、 at 236 2C (73.4 6 3.6F). At the end of this period measure andrecord the width of the stain (if any) in 0.1 mm. Take fourreadings at 90 points around each pat. Record the average ofthe eight readings and designate this value as S.9.1.3 Remove the pat with a putty knife and break the blockin two, ap
20、proximately through the middle of the sealed area, bya sharp blow with a small hammer. Measure and record thedepth of penetration of the stain into the block, taking threereadings on each broken piece, two at the ends and one in themiddle of the stained surface. Record the average of the twelvereadi
21、ngs and designate this value as T.9.1.4 The average of the two values, designated as S and T,shall be considered as the final stain value for the alternativeprocedure.10. Report10.1 Standard ProcedureReport the following informa-tion:10.1.1 Width of stain,10.1.2 Number of papers stained, and10.1.3 S
22、tain index.10.2 Alternative ProcedureReport the following informa-tion:10.2.1 Average stain value on surface of each block, desig-nated as S,10.2.2 Average stain value inside of each block, designatedas T, and10.2.3 Final stain value (average of S and T).11. Precision and Bias411.1 PrecisionThe prec
23、ision calculations for this testmethod are based on the stain index results of five laboratoriestesting two oil-based materials in triplicate in accordance withthe procedure given in Section 8. The results are given in Table1.11.1.1 Round robin data was generated by testing eachsealant specimen thre
24、e times, whereas the procedure in this testmethod specifies only one test. Single specimen testing mayyield more variable results than indicated in Table 1.11.1.2 Committee C-24 is actively pursuing the develop-ment of data for this test method when used for other types ofsealants.11.2 BiasSince the
25、re is no accepted reference materialsuitable for determining the bias for this test method forstaining, bias has not been determined.12. Keywords12.1 porous substrate; sealant; stainingASTM International takes no position respecting the validity of any patent rights asserted in connection with any i
26、tem mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical co
27、mmittee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a
28、 meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Dri
29、ve, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.o
30、rg). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:C24-1027.TABLE 1 Precision DataAMaterialAverageStain IndexEstim
31、atedStandardDeviation(WithinLaboratory)EstimatedStandardDeviation(BetweenLaboratory)Repeat-ability(Internal)Reproduc-ibilityG1G22.3004.7380.0500.2500.5200.4290.1420.7081.4721.214AAt 95 % confidence a variation in the stain index of as much as 0.71 can beexpected within a laboratory and 1.47 between laboratories, when materials aretested in triplicate.D2203 01 (2011)2
