1、Designation: C1184 05C1184 13Standard 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 p
2、arentheses 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 liquid applied, single-component or multicomponent, chemically curingelastomeric structural si
3、licone sealants herein referred to as the 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 determined byavailable ASTM test methods, are d
4、escribed in this specification. Additional properties may be added as ASTM test methods forthose properties become available.1.3 The values stated in metric (SI) units are to be regarded as the standard. The values in parentheses are for information only.1.4 Committee C24, with jurisdiction over thi
5、s specification, is aware of two comparable standards by other organizations:ETAG No. 002 and the Chinese national standard GB16776.2. Referenced Documents2.1 ASTM Standards:2C603 Test Method for Extrusion Rate and Application Life of Elastomeric SealantsC639 Test Method for Rheological (Flow) Prope
6、rties of Elastomeric SealantsC661 Test Method for Indentation Hardness of Elastomeric-Type Sealants by Means of a DurometerC679 Test Method for Tack-Free Time of Elastomeric SealantsC717 Terminology of Building Seals and SealantsC792 Test Method for Effects of Heat Aging on Weight Loss, Cracking, an
7、d Chalking of Elastomeric SealantsC794 Test Method for Adhesion-in-Peel of Elastomeric Joint SealantsC1087 Test Method for Determining Compatibility of Liquid-Applied Sealants with Accessories Used in Structural GlazingSystemsC1135 Test Method for Determining Tensile Adhesion Properties of Structura
8、l SealantsC1401 Guide for Structural Sealant GlazingC1442 Practice for Conducting Tests on Sealants Using Artificial Weathering ApparatusG151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultraviolet (
9、UV) Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials2.2 European Organization for Technical Approvals Document:3ETAG No. 002 Guideline for European Technical Approval for Structural Sealant Glazing System
10、s2.3 Chinese National Standard:4GB 167761997 Structural Silicone Sealants for Building3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitions of the following terms used in this specification: adhesive failure,chemically curing sealant, cohesive failure, compatibility, cure, elastomer
11、ic, glazing, hardness, non-sag sealant, primer, sealant,shelf life, silicone sealant, structural sealant, substrate, and tooling.1 This specification is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.10 onSpecification
12、s, Guides and Practices.Current edition approved Sept. 1, 2005Feb. 1, 2013. Published October 2005February 2013. Originally approved in 1991. Last previous edition approved in 20002005as C1184 00aC1184 05.1. DOI: 10.1520/C1184-05.10.1520/C1184-13.2 For referencedASTM standards, visit theASTM website
13、, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from www.eota.be4 Published May 15, 2005, Implemented August 1, 1997; www.nstn.orghttp:/ document is n
14、ot 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. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropria
15、te. 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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Significance and Use4.1 Not all sealants meeting this specifica
16、tion should be presumed to be suitable for all applications and all substrates. Thisspecification assists in selecting sealants that meet certain minimum standards of performance.4.2 Although this specification qualifies a sealant for use, it does not address the adhesion capability of the sealant f
17、or a specificsubstrate nor the compatibility of the sealant with the materials it contacts.Adhesion and compatibility characteristics required forspecific substrates or finishes can be determined by Test Method C794 for adhesion and Test Method C1087 for compatibility.4.3 To properly specify a seala
18、nt for the intended use when using this specification, it is essential that the applicable type anduse be included.5. Classification of Sealants5.1 A sealant qualifying under this specification shall be classified as to type and use as given in 4.1.1-4.1.4.5.1.1 Type SSingle-component sealant.5.1.2
19、Type MMulticomponent sealant.5.1.3 Use GA sealant that meets the requirements of this specification when tested on a clear, uncoated float glass substrate.5.1.4 Use OA sealant that meets the requirements of this specification when tested on a substrate other than a clear, uncoatedfloat glass substra
20、te (for example, Use OGranite).6. Materials and Manufacture6.1 Furnish single-component sealants as a homogeneous mixture of a consistency suitable for application and within themanufacturers stated shelf life. Apply the sealant in accordance with the written recommendations of the sealant manufactu
21、rer.The cured sealant shall be an elastomeric solid.6.2 Furnish multicomponent sealants in two or more components. Mix and apply the sealant in accordance with the writtenrecommendations of the sealant manufacturer. The cured sealant shall be an elastomeric solid.6.3 Furnish primer of the type requi
22、red by, and apply in accordance with, the written recommendations of the sealantmanufacturer.7. Requirements7.1 The physical, mechanical, and performance properties of the sealant shall conform to the requirements described in Table1.7.2 When a primer (see Note 1) is required by the sealant manufact
23、urer, all tests performed in accordance with this specificationshall be performed witwith the primer. When a primer is not required by the sealant manufacturer, all tests performed in accordancewith this specification shall be performed without a primer.NOTE 1The proper use of primers is described i
24、n Guide C1401.7.3 The standard substrate for this specification is clear, uncoated float glass.7.4 Standard conditions referred to in this specification are a temperature of 23 6 2C (73.4 6 3.6F) and 506 5 % relativehumidity.8. Test Methods8.1 Rheological PropertiesTest Method C639, using test proce
25、dures for Type II and IV sealants.8.2 ExtrudabilityTest Method C603.8.3 HardnessTest Method C661, using a Type A-2 durometer.8.4 Heat AgingTest Method C792, using a temperature of 88 6 5C (190 6 10F).8.5 Tack-Free TimeTest Method C679.8.6 Tensile AdhesionTest Method C1135, using a rate of pull of 12
26、.7 mm (12 in.)/min. Determine the average ultimate tensilevalue for each group of five specimens prepared as described in 8.6.1 and 8.6.2.8.6.1 Prepare, in accordance with Test Method C1135, a total of 25 specimens for testing, except that the distance betweensubstrates will be 9.5 mm (38 in.).8.6.2
27、 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 the initial curing period.8.6.2.2 Condition five specimens for 1 h at 88 6 5C (190 6 10F) in a forced air oven. Test the s
28、pecimens at 88 6 5C (1906 10F).8.6.2.3 Condition five specimens for 1 h at 29 6 2C (20 6 4F). Test the specimens at 296 2C (20 6 4F).8.6.2.4 Immerse five specimens in deionized or distilled water at standard temperature for seven days. Test the specimens atstandard conditions within 10 min after the
29、ir removal from the water.C1184 1328.6.2.5 Expose five specimens with the bond surface facing the light source to either of the exposure conditions specified belowin apparatus that conforms to the requirements defined in Practice C1442. Because of differences in spectral power distribution ofthe exp
30、osure sources (consult G154 and G155) and differences in test parameters, test results may differ between the two typesof tests. Choice of type of exposure shall be by mutual agreement between the interested parties.NOTE 2Refer to Practice G151 for full cautionary guidance regarding laboratory weath
31、ering of nonmetallic materials.(a)Fluorescent UV/Condensation ApparatusOperate the device in accordance with the procedure in Practice C1442, Section7.3 and expose the specimens for a minimum of 5,000 h.(b)Xenon Arc Weathering DeviceOperate the device in accordance with the procedure in C1442, Secti
32、on 7.2. Exposespecimens for a minimum of 5,000 h at the irradiance level of 0.51 W/(m2 nm) at 340 nm. The radiant exposure is 9180 kJ/(m2 nm) at 340 nm. To determine the exposure time required to obtain the same radiant exposure at other irradiance levels specifiedin Practice C1442, see Annex A1 in
33、Practice C1442.NOTE 3The exposure duration shall be of sufficient length to produce a detectable change of the property evaluated for a material known to give poorperformance in the application of interest.9. Shelf Life9.1 If it is desired to test shelf life of a structural sealant, then the test me
34、thods listed in Section 8 should be performed on sealantthat has been stored to within 30 days of the manufacturers stated shelf life. All of the requirements of Table 1 should be met.TABLE 1 Requirements for Physical, Mechanical andPerformance Qualities of the SealantProperty Requirement Test Metho
35、dRheologic, max C639Vertical 4.8 mm (316 in.)Horizontal no deformationExtrudability, max 10 s C603Hardness, 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) 34
36、5 kPa (50 psi)29C (20F) 345 kPa (50 psi)Water immersion 345 kPa (50 psi)5000 h weathering 345 kPa (50 psi) 8.6.2.5Shelf life, min 6 months 9.1TABLE 1 Requirements for Physical, Mechanical andPerformance Qualities of the SealantProperty Requirement Test MethodRheologic, max C639Vertical 4.8 mm (316 i
37、n.)Horizontal no deformationExtrudability, max 10 s C603Hardness, 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)Wa
38、ter immersion 345 kPa (50 psi)A minimum of 5000 h weathering 345 kPa (50 psi) 8.6.2.5Shelf life, min 6 months 9.1C1184 133APPENDIX(Nonmandatory Information)X1. STRUCTURAL SILICONE SEALANT MODULUS OF ELASTICITYX1.1 GeneralX1.1.1 The purpose of this appendix is to describe modulus considerations for a
39、 structural silicone sealant that is intended for arange of applications. Structural silicone sealants should be designed for both strength and flexibility for specific applications; thisimplies that the sealants modulus of elasticity should fall between a maximum and minimum value for a specific ap
40、plication.X1.1.2 The modulus of elasticity of a material describes its elongation response to an applied stress, and therefore is a measureof its flexibility, stiffness, or hardness. The term “modulus” used in this appendix refers to a sealants secant modulus of elasticity;see Terminology C717. Note
41、 that the units of modulus and stress can be the same (such as pounds per square inch), but theyrepresent different technical concepts. Because the modulus of a sealant is not constant, it is customary in the sealant industry tostate both the modulus and the strain at which it was measured (for exam
42、ple, 99 kPa at 12.5 % strain).X1.1.3 Structural silicone sealants are used to structurally attach glass and other materials to a framing system; to transfer loadsapplied to the glazing material to the framing system; and to accommodate anticipated movement between the glazed materialsand the support
43、ing framework. When selecting a structural sealant for a specific application, the design professional must selecta sealant that has the necessary strength to resist applied loads, but also has enough flexibility to accommodate differentialmovement.X1.1.4 Currently, structural silicone sealants are
44、manufactured to have performance properties which allow a particular materialto be used in a wide variety of applications. If a particular structural silicone sealant is to be used in a specific application, it musthave a modulus which is also acceptable for that application.X1.1.5 The modulus of a
45、sealant may be a function (essentially linear) of temperature. It should be verified that the modulus willfall within the minimum and maximum criteria over the anticipated service temperature range.X1.1.6 To adequately evaluate a sealant for a specific application, a stress/strain plot should be dev
46、eloped for the specific projectconditions utilizing Test Method C1135. When developing the stress/strain plot, the test conditions (such as sealant jointconfiguration or environmental conditioning) should be modified to correlate with the conditions specified or predicted for thespecific specificati
47、on. The application-specific stress/strain plots (developed using the average values for each set of test assembliesas described in Test Method C1135), in combination with the design criteria for the application, can be evaluated to determine ifthe proposed sealant is appropriate for the application
48、.X1.2 Minimum ModulusX1.2.1 The minimum acceptable structural sealant modulus (softest, or highest acceptable flexibility) is based on the premise thatthe sealant must be sufficiently stiff to retain the panel without excessive deflection. The limiting case is when the sealant depthis stressed by ne
49、gative (outward acting) wind or other lateral loads up to its design load; even at that stress it must not elongatebeyond the practical limit of the design geometry (such as the setting blocks supporting the weight of the panel).X1.3 Maximum ModulusX1.3.1 The maximum acceptable modulus (hardest, or least acceptable flexibility) is dictated by the requirement that the structuralsealant joint must have sufficient flexibility to respond to the wind strain or differential thermal movement between the pan
