ASTM C834-2005 Standard Specification for Latex Sealants《胶乳密封料标准规范》.pdf

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1、Designation: C 834 05Standard Specification forLatex Sealants1This standard is issued under the fixed designation C 834; 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 t

2、he 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 specification covers one component latex sealantsused for sealing joints in build

3、ing construction.1.2 A sealant meeting the requirements of this specificationshall be classified by the manufacturer to be one of the typesand grades defined in Section 4.1.3 The values stated in SI units are to be regarded as thestandard. The inch-pound in parenthesis are provided forinformation pu

4、rposes only.1.4 The following precautionary caveat pertains only to thetest method portion, Section 10, of this Specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish approp

5、riate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.NOTE 1Currently, there is no ISO standard similar to this specifica-tion.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and SealantsC 732 Test Method for Aging Eff

6、ects of Artificial Weather-ing on Latex SealantsC 734 Test Method for Low-Temperature Flexibility ofLatex Sealants After Artificial WeatheringC 736 Test Method for Extension-Recovery and Adhesionof Latex SealantsC 1183 Test Method for Extrusion Rate of ElastomericSealantsC 1193 Guide for Use of Join

7、t SealantsC 1241 Test Method for Volume Shrinkage of Latex Seal-ants During CureD 2202 Test Method for Slump of SealantsD 2203 Test Method for Staining from SealantsD 2377 Test Method for Tack-Free Time of Caulking Com-pounds and Sealants3. Terminology3.1 DefinitionsDefinitions of the following term

8、s apply tothis specification and are found in Terminology C 717: adhe-sive failure (adhesion loss), cure, joint, latex sealant, sealant,shrinkage (volume), and substrate.4. Classification of Sealants4.1 A sealant qualifying under this specification shall beclassified by type and grade as follows:4.1

9、.1 Type OPAn opaque sealant containing color pig-ments or extender pigments, or both, that has no more than30 % volume shrinkage (see 10.1.3).4.1.2 Type CA clear or translucent sealant that has nomore than 50 % volume shrinkage (see 10.1.3).4.1.3 Grade 18CA sealant that meets the requirementsfor low

10、 temperature flexibility (see 7.1) when tested at 18C(0F).4.1.4 Grade 0CA sealant that meets the requirements forlow temperature flexibility (see 7.1) when tested at 0C (32F).4.1.5 Grade NFA sealant that does not meet the require-ments for low temperature flexibility of Grade 0C (see 4.1.4).5. Mater

11、ials and Manufacture5.1 The sealant shall be composed of latex formulated withappropriate fillers, pigments, and chemical additives to result inconformance to this specification.5.2 All material and workmanship shall be in accordancewith good commercial practice. The producer is permitted awide lati

12、tude in choice of raw materials for making theseproducts. Consequently, there is no implication that the com-pounds are equivalent in all physical properties.1This specification is under the jurisdiction of ASTM Committee C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommi

13、ttee C24.10on Specifications, Guides and Practices.Current edition approved May 1, 2005. Published June 2005. Originallyapproved in 1976. Last previous edition approved in 2000 as C 834 00e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serv

14、iceastm.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 19428-2959, United States.5.3 The manufacturing process shall be such as will ens

15、urea homogeneous mix, free of defects that would affect service-ability, and provide a consistency suitable for immediateapplication.6. General Requirements6.1 The sealant in the original unopened container shallmeet the requirements of this specification for at least 12months from the date of manuf

16、acture when stored at atemperature neither below 5C (41F) nor exceeding 26.7C(80F).6.2 After 21 days cure at laboratory conditions controlled at23 6 2C (73 6 3.6F) and 50 6 10 % relative humidity, thecolor of the sealant shall be that color that has been agreedupon between the purchaser and the supp

17、lier.6.3 The sealant is intended for application to clean substratesurfaces only.7. Physical Properties7.1 The sealant shall conform to the physical requirementsspecified in Table 1 according to type and grade.8. Significance and Use8.1 This specification covers two types and three grades oflatex se

18、alants as described in Section 4 that are formulated forgeneral caulking and sealing operations in building construc-tion. It should be recognized by the user that not all sealantsmeeting this specification are suitable for all applications andall substrates. It is essential, therefore, that the typ

19、e and gradebe specified for proper description of a sealant. Test methodsrelate to special standard substrates of glass, wood and alumi-num. If tests are required using substrates in addition to orother than standard, they should be so specified for testing.8.2 Refer to Guide C 1193 for information

20、on the proper useof sealants meeting this specification.9. Sampling9.1 The sealant to be tested for conformance to this speci-fication shall be taken directly from a randomly selectedcontainer as commercially supplied by the manufacturer.10. Test Methods10.1 Perform all of the following tests at lab

21、oratory condi-tions controlled at 23 6 2C (73 6 3.6F) and 506 10 %relative humidity. Condition sealant samples for at least5hatthese conditions before any tests are conducted.10.1.1 Extrudability After AgingTest Method C 1183,Procedure B.10.1.2 Artificial WeatheringTest Method C 732.10.1.3 Volume Sh

22、rinkageTest Method C 1241.10.1.4 Low-Temperature FlexibilityTest Method C 734.For 0C sealants, the test method is modified to perform thebend at 0 6 1C (32 6 2F).10.1.5 Extension-Recovery and AdhesionTest MethodC 736.10.1.6 SlumpTest Method D 2202 modified to advancethe plunger to its maximum extent

23、, leaving a solid cylinder ofsealing compound 38 mm (112 in.) in diameter and 10 mm (38in.) thick, ready to flow down the face of the instrument.10.1.7 StainingTest Method D 2203.10.1.8 Tack-Free TimeTest Method D 2377 modified toexpose the specimen for 1 h before applying polyethylene stripfor Type

24、 OP and modified to expose the specimen for 24 hbefore applying the polyethylene strip for Type C sealants.11. Packaging11.1 Unless otherwise specified in the contract or order, thematerial shall be packaged in standard commercial containersso constructed as to ensure acceptance by common or otherca

25、rrier for safe transportation at the lowest rate to the point ofdelivery.11.2 Shipping containers shall be marked with the name,grade, and quantity of the material contained therein, as definedby the contract or order under which shipments are made. Thename of the manufacturer, the lot and batch num

26、ber of thecontract order, and the date of manufacture shall also beshown.12. Keywords12.1 latex sealantTABLE 1 Physical RequirementsTest RequirementsASTMTest MethodExtrudability 2 g/s, minimum C 1183,Procedure BArtificial weathering: C 732Wash-out none, after weatheringSlump none, after weatheringCr

27、acking none, after weatheringDiscoloration as acceptable to purchaserAdhesion loss 25 % max (estimated on the basisof a total possible bond areaof 45.16 cm2(7 in.2)Volume shrinkage:Type OP 30 % max C 1241Type C 50 % maxLow-temperatureflexibility:Grades 18 and 0 no cracking through to substrate oradh

28、esion lossC 734AGrade NF noneRecovery 75 % min (average of all specimens) C 736Adhesion loss 25 % or 19.35 cm2(3 in.2) max (oftotal bond area of all specimens)C 736Slump 4 mm (0.15 in.) max(on each specimen)D 2202BStain index 3 max D 2203Tack-free time no material adhering to plastic strip D 2377CCo

29、lor as acceptable to purchaser 6.2ASee 10.1.4 for modification of this test method for 0C.BSee 10.1.6 for modification to this test method.CSee 10.1.8 for modification to this test method.C834052ASTM International takes no position respecting the validity of any patent rights asserted in connection

30、with any item 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 te

31、chnical committee 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 consider

32、ation at a 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

33、Harbor Drive, 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.org).C834053