1、Designation: C834 10Standard Specification forLatex Sealants1This standard is issued under the fixed designation C834; 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
2、 year of last reapproval. Asuperscript epsilon () 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 building
3、 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 purpo
4、ses 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 appropria
5、te 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:2C717 Terminology of Building Seals and SealantsC732 Test Method for Aging Effects
6、of Artificial Weather-ing on Latex SealantsC734 Test Method for Low-Temperature Flexibility of La-tex Sealants After Artificial WeatheringC736 Test Method for Extension-Recovery andAdhesion ofLatex SealantsC1183 Test Method for Extrusion Rate of ElastomericSealantsC1193 Guide for Use of Joint Sealan
7、tsC1241 Test Method for Volume Shrinkage of Latex Seal-ants During CureD2202 Test Method for Slump of SealantsD2203 Test Method for Staining from SealantsD2377 Test Method for Tack-Free Time of Caulking Com-pounds and Sealants3. Terminology3.1 DefinitionsDefinitions of the following terms apply toth
8、is specification and are found in Terminology C717: adhesivefailure (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:4.1.1 Type OPAn op
9、aque 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 temperature fl
10、exibility (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. Materials and Manufa
11、cture5.1 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 latitude in choice
12、of raw materials for making these1This specification is under the jurisdiction of ASTM Committee C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.10on Specifications, Guides and Practices.Current edition approved Jan. 1, 2010. Published February 2010. Originally
13、approved in 1976. Last previous edition approved in 2005 as C834 05. DOI:10.1520/C0834-10.2For 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 Sum
14、mary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.products. Consequently, there is no implication that the com-pounds are equivalent in all physical properties.5.3 The manufacturing process shall be such as
15、 will ensurea 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
16、 of manufacture 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
17、 the supplier.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 o
18、flatex sealants 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, tha
19、t the type 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 C1193 for info
20、rmation 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 test
21、s at laboratory 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 C1183, Pro-cedure B.10.1.2 Artificial WeatheringTest Method C732 (500 hex
22、posure).10.1.3 Volume ShrinkageTest Method C1241.10.1.4 Low-Temperature FlexibilityTest Method C734(500 h Artificial Weathering exposure). For 0C sealants, thetest method is modified to perform the bend at 0 6 1C (32 62F).NOTE 2The exposure times for the accelerated weathering tests usedin this spec
23、ification are meant to ensure a minimum level of performanceand cannot be used to estimate service life in any particular location.10.1.5 Extension-Recovery and AdhesionTest MethodC736.10.1.6 SlumpTest Method D2202 modified to advance theplunger to its maximum extent, leaving a solid cylinder ofseal
24、ing 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 D2203.10.1.8 Tack-Free TimeTest Method D2377 modified toexpose the specimen for 1 h before applying polyethylene stripfor Type OP and modified to expose the spec
25、imen 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 othercarrier for safe transportation at th
26、e 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 number of thecontract order, and the d
27、ate of manufacture shall also beshown.12. Keywords12.1 latex sealantTABLE 1 Physical RequirementsTest RequirementsASTMTest MethodExtrudability 2 g/s, minimum C1183,Procedure BArtificial weathering: 500 h C732Wash-out none, after weatheringSlump none, after weatheringCracking none, after weatheringDi
28、scoloration 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 C1241Type C 50 % maxLow-temperatureflexibility:After 500 h Artificial WeatheringexposureGrades 18 and 0 no cracking through to substr
29、ate oradhesion lossC734AGrade NF noneRecovery 75 % min (average of all specimens) C736Adhesion loss 25 % or 19.35 cm2(3 in.2) max (oftotal bond area of all specimens)C736Slump 4 mm (0.15 in.) max(on each specimen)D2202BStain index 3 max D2203Tack-free time no material adhering to plastic strip D2377
30、CColor 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.C834 102ASTM International takes no position respecting the validity of any patent rights asserted in connect
31、ion 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 responsibl
32、e technical 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 cons
33、ideration 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 B
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