ASTM C1184-2018e1 Standard Specification for Structural Silicone Sealants.pdf

1、Designation: C1184 181Standard Specification forStructural Silicone Sealants1This standard is issued under the fixed designation C1184; 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 parenthe

2、ses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEIn Table 1, the reference to Shelf Life was deleted editorially in August 2018.1. Scope1.1 This specification describes the properties of cold liquidapplied, si

3、ngle-component or multicomponent, chemically cur-ing elastomeric structural silicone sealants herein referred to asthe sealant. These sealants are intended to structurally adherecomponents of structural sealant glazing systems.1.2 Only those properties for which there are industry-agreed-upon minimu

4、m acceptable requirements, as determinedby available ASTM test methods, are described in this speci-fication. Additional properties may be added as ASTM testmethods for those properties become available.1.3 The values stated in metric (SI) units are to be regardedas the standard. The values in paren

5、theses are for informationonly.1.4 Committee C24, with jurisdiction over thisspecification, is aware of two comparable standards by otherorganizations: ETAG No. 002 and the Chinese national stan-dard GB16776.1.5 This international standard was developed in accor-dance with internationally recognized

6、 principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C603 Test Method for Extru

7、sion Rate and Application Lifeof Elastomeric SealantsC639 Test Method for Rheological (Flow) Properties ofElastomeric SealantsC661 Test Method for Indentation Hardness of Elastomeric-Type Sealants by Means of a DurometerC679 Test Method for Tack-Free Time of Elastomeric Seal-antsC717 Terminology of

8、Building Seals and SealantsC792 Test Method for Effects of HeatAging onWeight Loss,Cracking, and Chalking of Elastomeric SealantsC794 Test Method forAdhesion-in-Peel of Elastomeric JointSealantsC1087 Test Method for Determining Compatibility ofLiquid-Applied Sealants with Accessories Used in Struc-t

9、ural Glazing SystemsC1135 Test Method for Determining TensileAdhesion Prop-erties of Structural SealantsC1401 Guide for Structural Sealant GlazingC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test D

10、evices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultraviolet (UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 European Organization for Technical Approvals Docu-ment:3

11、ETAG No. 002 Guideline for European Technical Approvalfor Structural Sealant Glazing Systems2.3 Chinese National Standard:4GB 167761997 Structural Silicone Sealants for Building3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof the following terms used in this specification: ad

12、hesivefailure, chemically curing sealant, cohesive failure,compatibility, cure, elastomeric, glazing, hardness, non-sagsealant, primer, sealant, shelf-life, silicone sealant, structuralsealant, standard conditions, substrate, and tooling.1This specification is under the jurisdiction of ASTM Committe

13、e C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.10on Specifications, Guides and Practices.Current edition approved June 1, 2018. Published July 2018. Originally approvedin 1991. Last previous edition approved in 2014 as C1184 14. DOI: 10.1520/C1184-18E01.2For

14、 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.3Available from www.eota.be4Published May 15, 2005, Implemented A

15、ugust 1, 1997; http:/ ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopm

16、ent of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14. Significance and Use4.1 Not all sealants meeting this specification should bepresumed to be suitable for all applications and all substrates.This specific

17、ation assists in selecting sealants that meet certainminimum standards of performance.4.2 Although this specification qualifies a sealant for use, itdoes not address the adhesion capability of the sealant for aspecific substrate nor the compatibility of the sealant with thematerials it contacts. Adh

18、esion and compatibility characteris-tics required for specific substrates or finishes can be deter-mined by Test Method C794 for adhesion and Test MethodC1087 for compatibility.4.3 To properly specify a sealant for the intended use whenusing this specification, it is essential that the applicable ty

19、peand use be included.5. Classification of Sealants5.1 A sealant qualifying under this specification shall beclassified as to type and use as given in 4.1.1-4.1.4.5.1.1 Type SSingle-component sealant.5.1.2 Type MMulticomponent sealant.5.1.3 Use GA sealant that meets the requirements of thisspecifica

20、tion when tested on a clear, uncoated float glasssubstrate.5.1.4 Use OA sealant that meets the requirements of thisspecification when tested on a substrate other than a clear,uncoated float glass substrate (for example, Use OGranite).6. Materials and Manufacture6.1 Furnish single-component sealants

21、as a homogeneousmixture of a consistency suitable for application. Apply thesealant in accordance with the written recommendations of thesealant manufacturer. The cured sealant shall be an elastomericsolid.6.2 Furnish multicomponent sealants in two or more com-ponents. Mix and apply the sealant in a

22、ccordance with thewritten recommendations of the sealant manufacturer. Thecured sealant shall be an elastomeric solid.6.3 Furnish primer of the type required by, and apply inaccordance with, the written recommendations of the sealantmanufacturer.7. Requirements7.1 The physical, mechanical, and perfo

23、rmance propertiesof the sealant shall conform to the requirements described inTable 1.7.2 When a primer (see Note 1) is required by the sealantmanufacturer, all tests performed in accordance with thisspecification shall be performed with the primer. When aprimer is not required by the sealant manufa

24、cturer, all testsperformed in accordance with this specification shall beperformed without a primer.NOTE 1The proper use of primers is described in Guide C1401.7.3 The standard substrate for this specification is clear,uncoated float glass.8. Test Methods8.1 Rheological PropertiesTest Method C639, u

25、sing testprocedures for Type II and IV sealants.8.2 ExtrudabilityTest Method C603.8.3 HardnessTest Method C661, using a TypeA-2 durom-eter.8.4 Heat AgingTest Method C792, using a temperature of88 6 5C (190 6 10F).8.5 Tack-Free TimeTest Method C679.8.6 Tensile AdhesionTest Method C1135, using a rate

26、ofpull of 12.7 mm (12 in.)/min. Determine the average ultimatetensile value for each group of five specimens prepared asdescribed in 8.6.1 and 8.6.2.8.6.1 Prepare, in accordance with Test Method C1135,atotal of 25 specimens for testing, except that the distancebetween substrates will be 9.5 mm (38 i

27、n.).8.6.2 Cure all specimens for 21 days at standard conditions.Condition and test the specimens as described in 8.6.2.1 8.6.2.5.8.6.2.1 Test five specimens at standard conditions after theinitial curing period.8.6.2.2 Condition five specimens for1hat886 5C (1906 10F) in a forced air oven. Test the

28、specimens at 88 6 5C(190 6 10F).8.6.2.3 Condition five specimens for1hat296 2C (206 4F). Test the specimens at 296 2C (20 6 4F).8.6.2.4 Immerse five specimens in deionized or distilledwater at standard temperature for seven days. Test the speci-mens at standard conditions within 10 min after their r

29、emovalfrom the water.8.6.2.5 Expose five specimens with the bond surface facingthe light source to either of the exposure conditions specifiedbelow in apparatus that conforms to the requirements definedin Practice C1442. Because of differences in spectral powerdistribution of the exposure sources (c

30、onsult G154 and G155)and differences in test parameters, test results may differbetween the two types of tests. Choice of type of exposure shallbe by mutual agreement between the interested parties.TABLE 1 Requirements for Physical, Mechanical, andPerformance Qualities of the SealantProperty Require

31、ments Test MethodExtrudability, max 10 s C603Hardness, Shore A 20 to 60 C661Heat Aging C792Weight Loss, max 10 %Cracking noneChalking noneRheological, max C639Vertical 4.8 mm (316 in.)Horizontal no deformationTack-free time, max no transfer in 3 h C679Tensile Value, min C1135Standard Conditions: 345

32、 kPa (50 psi)88C (190F) 345 kPa (50 psi)29C (20F) 345 kPa (50 psi)Water Immersion 345 kPa (50 psi)A minimum of 5000 h weather-ing345 kPa (50 psi) 8.6.2.5C1184 1812NOTE 2Refer to Practice G151 for full cautionary guidance regardinglaboratory weathering of nonmetallic materials.(a) Fluorescent UV/Cond

33、ensation ApparatusOperate thedevice in accordance with the procedure in Practice C1442,Section 7.3 and expose the specimens for a minimum of 5,000h.(b) Xenon Arc Weathering DeviceOperate the device inaccordance with the procedure in C1442, Section 7.2. Exposespecimens for a minimum of 5,000 h at the

34、 irradiance level of0.51 W/(m2 nm) at 340 nm. The radiant exposure is 9180kJ/(m2 nm) at 340 nm. To determine the exposure timerequired to obtain the same radiant exposure at other irradiancelevels specified in Practice C1442, see Annex A1 in PracticeC1442.9. Shelf Life9.1 Shelf-LifeThe shelf-life of

35、 this sealant shall be deter-mined by its manufacturer.When establishing the shelf-life, themanufacturer should also identify acceptable conditions ofstorage for the sealant.APPENDIX(Nonmandatory Information)X1. STRUCTURAL SILICONE SEALANT MODULUS OF ELASTICITYX1.1 GeneralX1.1.1 The purpose of this

36、appendix is to describe modulusconsiderations for a structural silicone sealant that is intendedfor a range of applications. Structural silicone sealants shouldbe designed for both strength and flexibility for specificapplications; this implies that the sealants modulus of elastic-ity should fall be

37、tween a maximum and minimum value for aspecific application.X1.1.2 The modulus of elasticity of a material describes itselongation response to an applied stress, and therefore is ameasure of its flexibility, stiffness, or hardness. The term“modulus” used in this appendix refers to a sealants secantm

38、odulus of elasticity; see Terminology C717. Note that theunits of modulus and stress can be the same (such as poundsper square inch), but they represent different technical con-cepts. Because the modulus of a sealant is not constant, it iscustomary in the sealant industry to state both the modulus a

39、ndthe strain at which it was measured (for example, 99 kPa at12.5 % strain).X1.1.3 Structural silicone sealants are used to structurallyattach glass and other materials to a framing system; to transferloads applied to the glazing material to the framing system; andto accommodate anticipated movement

40、 between the glazedmaterials and the supporting framework. When selecting astructural sealant for a specific application, the design profes-sional must select a sealant that has the necessary strength toresist applied loads, but also has enough flexibility to accom-modate differential movement.X1.1.

41、4 Currently, structural silicone sealants are manufac-tured to have performance properties which allow a particularmaterial to be used in a wide variety of applications. If aparticular structural silicone sealant is to be used in a specificapplication, it must have a modulus which is also acceptable

42、for that application.X1.1.5 The modulus of a sealant may be a function (essen-tially linear) of temperature. It should be verified that themodulus will fall within the minimum and maximum criteriaover the anticipated service temperature range.X1.1.6 To adequately evaluate a sealant for a specificapp

43、lication, a stress/strain plot should be developed for thespecific project conditions utilizing Test Method C1135. Whendeveloping the stress/strain plot, the test conditions (such assealant joint configuration or environmental conditioning)should be modified to correlate with the conditions specifie

44、d orpredicted for the specific specification. The application-specificstress/strain plots (developed using the average values for eachset of test assemblies as described in Test Method C1135), incombination with the design criteria for the application, can beevaluated to determine if the proposed se

45、alant is appropriatefor the application.X1.2 Minimum ModulusX1.2.1 The minimum acceptable structural sealant modulus(softest, or highest acceptable flexibility) is based on thepremise that the sealant must be sufficiently stiff to retain thepanel without excessive deflection. The limiting case is wh

46、enthe sealant depth is stressed by negative (outward acting) windor other lateral loads up to its design load; even at that stress itmust not elongate beyond the practical limit of the designgeometry (such as the setting blocks supporting the weight ofthe panel).X1.3 Maximum ModulusX1.3.1 The maximu

47、m acceptable modulus (hardest, or leastacceptable flexibility) is dictated by the requirement that thestructural sealant joint must have sufficient flexibility to re-spond to the wind strain or differential thermal movementbetween the panel and the supporting framework, withoutbeing stressed in shea

48、r in excess of the design parameters.C1184 1813ASTM 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 patent rights,

49、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 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 meeting of theresponsible technical committee, w