1、Designation: C510 05a (Reapproved 2011)C510 16Standard 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
2、 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 procedure to determine if a sample of a jo
3、int sealant will stain the substratewhen in contract with masonry, concrete, or stone (such as marble, limestone, sandstone, and granite). This test method also isintended to determine whether the sealant itself will change in color when exposed to the weather.1.2 The values stated in SI units are t
4、o be regarded as the standard. The value given in parentheses are for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices
5、and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)C150 Specification for Portland CementC207 Specification for Hydrated Lime
6、 for Masonry PurposesC717 Terminology of Building Seals and SealantsC1442 Practice for Conducting Tests on Sealants Using Artificial Weathering ApparatusD2203 Test Method for Staining from SealantsG113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials3. Termino
7、logy3.1 DefinitionsFor definitions of terms used in this test method, see Terminology C717 for terms relating to building seals andsealants, and Terminology G113 for terms relating to natural and artificial weathering tests.4. Significance and Use4.1 Staining of a building is an aesthetically undesi
8、reable occurance.undesirable occurrence. This test method evaluates thelikelihood of a sealant causing early stain on a porous substrate due to certain chemical exudations from the sealant.4.1.1 This test method may not predict staining caused by such factors as residue run-down or dirt pick-up by a
9、 sealant exudate.4.2 This test method is useful to predict potential color changes in the sealant itself after weathering.4.3 This test method measures color change in a sealant and staining of substrate by the sealant under conditions of artificialweathering. See also Test Method D2203, which measu
10、res staining by a sealant due to gross exudations from the sealant; it doesnot subject the sealant to artificial weathering.5. Apparatus5.1 The exposure apparatus shall be one of the three types of laboratory accelerated weathering devices described in PracticeC1442, that use either xenon arc, fluor
11、escent UV or open flame carbon arc radiation. Consult Practice C1442 for the differences1 This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.40 onWeathering.Current edition approved June 1, 2011Aug. 1,
12、2016. Published August 2011September 2016. Originally approved in 1963. Last previous edition approved in 20052011as C510 05a.C510 05a(2011). DOI: 10.1520/C0510-05AR11.10.1520/C0510-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm
13、.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
14、it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr
15、 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1in test parameters among the devices. Because of differences in test conditions, test results may differ with the type of device used.The choice of device shall be by mutual agreement among the interested parties.6. Material
16、s6.1 Portland Cement, white, nonstaining, conforming to Type I of Specification C150.6.2 Hydrated Lime, conforming to Type S of Specification C207.6.3 Ottawa Sand, graded, white, conforming to the requirements of Section 4 of Test Method C109/C109M.6.4 Aluminum Plates, three eight 152 by 70-mm (6 by
17、 234-in.), No. 16 gage.6.5 Metal Frames, two rectangular noncorrosive, designated as A and B; frame A shall be 6 mm (14 in.) thick with the insideopening slightly larger than an aluminum plate described in 6.4; frame B shall have inside dimensions of 127 by 38 by 6 mm (5by 112 by 14 in.) thick.7. Te
18、st Specimens7.1 The test specimen shall consist of a slab of mortar mix upon which is placed a layer of sealant. Prepare a minimum of eightspecimens, four of which are then covered with sealant.7.2 The mortar mix shall be prepared by combining, by weight, 1 part white portland cement, 0.25 part hydr
19、ated lime, and 4parts graded Ottawa sand, with sufficient water to make a 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 three aluminum plates to adepth approximately 6 mm (14 in.) and struck off f
20、lat with a spatula. After carefully removing the frame, allow the specimens tocure in air for 4 h at 23 6 2C (73.4 6 3.6F) and 50 6 5 % relative humidity.standard conditions.8. Conditioning8.1 Store the unopened sample of one- or two-part sealant at 23 6 2C (73.4 6 3.6F) and 50 6 5 % relative humidi
21、ty standardconditions for 16 to 24 h immediately before testing.9. Procedure9.1 At the end of the 4-h curing period described in 7.3, spread a 6-mm (14-in.) thick layer of sealant, with the aid of frameB, over the surface of two of the three four specimens, leaving a margin of approximately 13 mm (1
22、2 in.) of mortar free of sealant.Leave the third specimen other four specimens without sealant.9.1.1 Where a primer is submitted with a sample, apply the primer in accordance with the manufacturers directions to half thesurface of the cured mortar of the three specimens before application of the sea
23、lant. For two-part sealants, mix approximately 200g.9.2 Then expose the three specimens in air for 16 to 24 h at 23 6 2C (73.4 6 3.6F) and 50 6 5 % relative humidity.standardconditions.9.3 After the 16 to 24-h curing period, place at least four specimens, two(two with sealant and two without sealant
24、,sealant), onthe inside of the accelerated weathering machine. The exposure duration shall be a minimum of 100 h for the fluorescentUV/condensation and open flame carbon arc tests. The exposure duration for the xenon arc test shall be a minimum of 184kJ/(m2 nm) at 340 nm. This is based on a minimum
25、of a 100-h exposure at an irradiance level of 0.51 W/(m2 nm) at 340 nm.SeeAnnexA1 in Practice C1442 for determining the exposure time required to obtain the same radiant exposure at other irradiancelevels.NOTE 1The minimum exposure duration may not be sufficient to identify an unacceptable material.
26、9.3.1 Specimen temperature shall be 60 6 2.8C (140 6 5F) and water temperature 24 6 2.2C (75 6 4F).9.4 Expose the third specimen (with pair of specimens (one with sealant) in air in the laboratory at 23 6 2C (73.4 6 3.6F)and 50 6 5 % relative humidity standard conditions for 14 consecutive days. Dur
27、ing this exposure period immerse the thirdspecimen these specimens in distilled water for 1 min once a day (5 days per week).9.5 The fourth pair of specimens with and without sealant will be used as the controls. Expose these to standard conditions for14 consecutive days.9.6 At the end of the exposu
28、re periods, examine the specimens containing the sealant for stains in the mortar and color changesin the sealant. Use the mortar specimen without the sealant as a control.10. Report10.1 Report a stain if there is any discoloration in the mortar color of the sealant test specimens when compared with
29、 the mortarcolor of the control specimen.C510 16210.2 Report the name and description of the accelerated weathering machine and its test conditions.10.3 Record a color change if there is any variation in color of the sealant specimen that has been placed in the weatheringmachine and the sealant spec
30、imen exposed under laboratory conditions.11. Precision11.1 In a round-robin test series eight producers tested nine sealants for stain and colorchange properties. Excellent agreementwas obtained by the testing laboratories among the 432 determinations that were completed in the test series.12. Keywo
31、rds12.1 color change; sealant; stainstain; standard conditionsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such
32、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 committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited e
33、ither for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fai
34、r 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 Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this sta
35、ndard 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.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 163
