1、Designation: C1184 14Standard 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 parenthes
2、es indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification describes the properties of cold liquidapplied, single-component or multicomponent, chemically cur-ing elastomeric structural silicone
3、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 minimum acceptable requirements, as determinedby available ASTM test methods, are described
4、 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 parentheses are for informationonly.1.4 Committee C24, with jurisdiction over thisspecific
5、ation, is aware of two comparable standards by otherorganizations: ETAG No. 002 and the Chinese national stan-dard GB16776.2. Referenced Documents2.1 ASTM Standards:2C603 Test Method for Extrusion Rate and Application Lifeof Elastomeric SealantsC639 Test Method for Rheological (Flow) Properties ofEl
6、astomeric 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 Building Seals and SealantsC792 Test Method for Effects of HeatAging onWeight Loss,Cracking, and Chalking of
7、 Elastomeric SealantsC794 Test Method forAdhesion-in-Peel of Elastomeric JointSealantsC1087 Test Method for Determining Compatibility ofLiquid-Applied Sealants with Accessories Used in Struc-tural Glazing SystemsC1135 Test Method for Determining TensileAdhesion Prop-erties of Structural SealantsC140
8、1 Guide for Structural Sealant GlazingC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultraviolet (UV)Lamp Apparat
9、us 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:3ETAG No. 002 Guideline for European Technical Approvalfor Structural Sealant Glazing Systems2.3 Chinese Nati
10、onal Standard:4GB 167761997 Structural Silicone Sealants for Building3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof the following terms used in this specification: adhesivefailure, chemically curing sealant, cohesive failure,compatibility, cure, elastomeric, glazing, hardne
11、ss, non-sagsealant, primer, sealant, shelf life, silicone sealant, structuralsealant, standard conditions, substrate, and tooling.4. Significance and Use4.1 Not all sealants meeting this specification should bepresumed to be suitable for all applications and all substrates.This specification assists
12、 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. Adhesion and com
13、patibility characteris-tics required for specific substrates or finishes can be deter-mined by Test Method C794 for adhesion and Test MethodC1087 for compatibility.1This specification is under the jurisdiction of ASTM Committee C24 onBuilding Seals and Sealants and is the direct responsibility of Su
14、bcommittee C24.10on Specifications, Guides and Practices.Current edition approved June 1, 2014. Published July 2014. Originally approvedin 1991. Last previous edition approved in 2013 as C1184 13. DOI: 10.1520/C1184-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact A
15、STM 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 August 1, 1997; http:/ ASTM International, 100 Barr Harbor Drive, PO Box C700,
16、 West Conshohocken, PA 19428-2959. United States14.3 To properly specify a sealant for the intended use whenusing this specification, it is essential that the applicable typeand use be included.5. Classification of Sealants5.1 A sealant qualifying under this specification shall beclassified as to ty
17、pe 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 thisspecification when tested on a clear, uncoated float glasssubstrate.5.1.4 Use OA sealant that meets the requirements of thisspecification
18、 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 as a homogeneousmixture of a consistency suitable for application and within themanufacturers stated shelf life. Apply the seala
19、nt in accor-dance with the written recommendations of the sealant manu-facturer. The cured sealant shall be an elastomeric solid.6.2 Furnish multicomponent sealants in two or more com-ponents. Mix and apply the sealant in accordance with thewritten recommendations of the sealant manufacturer. Thecur
20、ed 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 performance propertiesof the sealant shall conform to the requirements described i
21、nTable 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 manufacturer, all testsperformed in accordance with this specification shall beperf
22、ormed 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, using testprocedures for Type II and IV sealants.8.2 ExtrudabilityTest Method
23、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 ofpull of 12.7 mm (12 in.)/min. Determine the average ultimatetensile value f
24、or 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 in.).8.6.2 Cure all specimens for 21 days at standard conditions.Condition and
25、 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 specimens at 88 6 5C(190 6 10F).8.6.2.3 Condition five specimens for1hat296 2
26、C (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 removalfrom the water.8.6.2.5 Expose five specimens with the bond surface faci
27、ngthe 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 (consult G154 and G155)and differences in test parameters, test results may dif
28、ferbetween the two types of tests. Choice of type of exposure shallbe by mutual agreement between the interested parties.NOTE 2Refer to Practice G151 for full cautionary guidance regardinglaboratory weathering of nonmetallic materials.(a)Fluorescent UV/Condensation ApparatusOperate thedevice in acco
29、rdance 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 irradiance level of0.51 W/(m2 nm) at 340 nm
30、. The radiant exposure is 9180kJ/(m2 nm) at 340 nm. To determine the exposure timeTABLE 1 Requirements for Physical, Mechanical andPerformance Qualities of the SealantProperty Requirement Test MethodRheologic, max C639Vertical 4.8 mm (316 in.)Horizontal no deformationExtrudability, max 10 s C603Hard
31、ness, Shore A 20-60 C661Heat agingWeight loss, max 10 %Cracking noneChalking noneTack-free time, max no transfer in 3 h C679Tensile value, min C1135Standard conditions: 345 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 weathering
32、 345 kPa (50 psi) 8.6.2.5Shelf life, min 6 months 9.1C1184 142required to obtain the same radiant exposure at other irradiancelevels specified in Practice C1442, see Annex A1 in PracticeC1442.9. Shelf Life9.1 If it is desired to test shelf life of a structural sealant,then the test methods listed in
33、 Section 8 should be performedon sealant that has been stored to within 30 days of themanufacturers stated shelf life. All of the requirements ofTable 1 should be met.APPENDIX(Nonmandatory Information)X1. STRUCTURAL SILICONE SEALANT MODULUS OF ELASTICITYX1.1 GeneralX1.1.1 The purpose of this appendi
34、x 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 between a
35、 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 secantmodulus
36、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 andthe s
37、train 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 betwee
38、n 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.X1.1.4 Curre
39、ntly, 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 acceptablefor tha
40、t 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 specificapplicatio
41、n, 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 specified orpre
42、dicted 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 sealant i
43、s 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 whenthe s
44、ealant 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 maximum accep
45、table 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 shear in ex
46、cess of the design parameters.C1184 143ASTM 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, and the
47、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
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