1、Designation: C 864 05Standard Specification forDense Elastomeric Compression Seal Gaskets, SettingBlocks, and Spacers1This standard is issued under the fixed designation C 864; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers preformed dense elastomericcompression gaskets and accessories for use in sealing and
3、glazing applications. These materials are generally used to sealor serve as components of compression sealing systems be-tween mechanically restrained surfaces in building construc-tions.1.2 Test Method C 1166, as referenced in this specification,should be used to measure and describe the properties
4、 ofmaterials, products, or assemblies in response to heat andflame under controlled laboratory conditions and should not beused to describe or appraise the fire hazard or fire risk ofmaterials, products, or assemblies under actual fire conditions.However, results of this test may be used as elements
5、 of a firerisk assessment which takes into account all of the factorswhich are pertinent to an assessment of the fire hazard of aparticular end use.1.3 The following precautionary statement pertains only tothe test method portion, Section 9, of this specification: Thisstandard does not purport to ad
6、dress all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.1.4 The committee with jurisdiction over this standard is
7、 notaware of any comparable standards published by other orga-nizations.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and SealantsC 1166 Test Method for Flame Propagation of Dense andCellular Elastomeric Gaskets and AccessoriesD 395 Test Methods for Rubber PropertyCo
8、mpressionSetD 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic ElastomersTensionD 573 Test Method for RubberDeterioration in an AirOvenD 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic ElastomersD 746 Test Method for Brittleness
9、 Temperature of Plasticsand Elastomers by ImpactD 925 Test Methods for Rubber PropertyStaining of Sur-faces (Contact, Migration, and Diffusion)D 1149 Test Method for Rubber DeteriorationSurfaceOzone Cracking in a ChamberD 1566 Terminology Relating to RubberD 2240 Test Method for Rubber PropertyDurom
10、eterHardnessD 3182 Practice for RubberMaterials, Equipment, andProcedures for Mixing Standard Compounds and Prepar-ing Standard Vulcanized Sheets3. Terminology3.1 Definitions:3.1.1 For the definition of elastomer, and other definitions ofterms used in this specification, see Terminology C 717.4. Mat
11、erials and Manufacture4.1 The elastomeric materials shall be manufactured from ahigh-quality ozone-resistant compound that, when properlycured, will comply with this specification.4.2 The cured compound shall be suitable for use whereresistance to sunlight, weathering, oxidation, and permanentdeform
12、ation under load are of prime importance.4.3 The preformed gaskets or shapes shall be free ofporosity, surface defects, and dimensional irregularities thatmay affect serviceability.4.4 Unless otherwise specified, the material shall be black.1This specification is under the jurisdiction of ASTM Commi
13、ttee C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.73on Compression Seal and Lock-Strip Gaskets.Current edition approved May 1, 2005. Published June 2005. Originallyapproved in 1977. Last previous edition approved in 2005 as C 864 99(2005).2For referenced AST
14、M 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho
15、cken, PA 19428-2959, United States.5. Physical Properties5.1 The physical properties of the material shall conform tothe requirements specified in Table 1.6. Dimensional Tolerances6.1 Permissible variations in all cross-sectional dimensionsshall be as specified in Table 2 unless otherwise agreed upo
16、nbetween the purchaser and the supplier.7. Significance and Use7.1 Flame Propagation:7.1.1 This specification has two options:7.1.1.1 Option IFlame propagation test is required.7.1.1.2 Option IIFlame propagation test is not required.7.1.2 In case no option is specified, Option I will apply.8. Sampli
17、ng8.1 Samples for testing shall be taken from the finishedproduct whenever possible.8.2 When the thickness or shape of the finished productmakes it impossible to obtain the type of samples specified inthe various methods, the manufacturer shall, upon request ofthe purchaser at the time of ordering,
18、furnish a sufficientnumber of test slabs, strips or blocks, prepared in accordancewith Practice D 3182, for the proper performance of therequired tests. The slabs or blocks shall be prepared from thesame production lot of compound and the same state of cure asis used for the gasket.9. Test Methods9.
19、1 HardnessTest Method D 2240. Measure hardness oneither a finished surface, a squarely cut end, or a flat sliced orbuffed surface, depending on the size and shape of thespecimen (Note 1). Determine the change in hardness afteroven aging for 70 h at 100 6 1C (212 6 2F).NOTE 1Hardness readings for the
20、 purpose of approximate determi-nations may be taken from the dumbbell specimens, recognizing that thesemay vary slightly from those taken from the finished material.9.2 Compression SetTest Methods D 395, Method B.Oven age specimens 22 h at 100 6 1C (2126 2F). Whereplied specimens are necessary, the
21、 results shall comply with therequirements of Table 1.9.3 Ozone ResistanceTest Method D 1149 (Specimen A),using an ozone concentration of 100 mPa, an exposure time of100hat406 2C (104 6 3.6F), and a specimen elongationof 20 %.9.4 Tensile Strength and Elongation Test Methods D 412.Where possible, pre
22、pare the dumbbells from sections of thefinished material. Determine the percentage change in tensilestrength and elongation after oven aging for 70 h at 100 6 1C(212 6 2F).9.5 Heat AgingTest Method D 573.9.6 Tear StrengthTest Method D 624, using Die C.9.7 Brittleness TemperatureTest Method D 746.9.8
23、 Non-StainingTest Methods D 925, Method B.9.9 Flame PropagationTest Method C 1166 determineswhether or not the gasket will propagate flame, with nosignificance being attached to such matters as fuel contribution,rate of flame spread, smoke generation, or the nature andtemperature of products of comb
24、ustion.10. Keywords10.1 compression; dense; elastomer; elastomeric; gasket;glazing; preformed; seal; setting block; spacersTABLE 1 Elastomeric Compression Seal Gaskets and Accessories Physical RequirementsProperties RequirementsASTM TestMethodHardness, nominal Shore A durometer6 5, asspecified by th
25、e purchaser40 50 60 70 80 90 D 2240Compression set, 22 h 100C (212F), max, % 35 30 30 30 35 40 D 395Ozone resistance, 100 mPa, 100 h 40C(104F), 20 % elongation no cracks D 1149 (Specimen A)at 73 magnificationTensile strength, min, MPa (psi) 10.3 (1500) 10.3 (1500) 11.0 (1600) 12.4 (1800) 12.4 (1800)
26、 12.4 (1800) D 412, Die CElongation at rupture, min, % 400 300 250 200 175 125 D 412, Die CHeat aging, 70 h, 100C (212F):Hardness increase, max durometer points 10 10 10 10 10 10 D 573Change in tensile strength, max, % 15 15 15 15 15 15Change in elongation, max, % 40 40 40 40 40 40Tear strength, min
27、, kN/m (lbf/in.) 26.3 (150) 26.3 (150) 26.3 (150) 17.5 (100) 17.5 (100) 13.1 (75) D 624, Die CBrittleness temperature, max, C 40 40 40 40 40 40 D 746Nonstaining no migratory stain D 925Flame propagation C 1166Option I 100 mm (4 in.) max. Option II no limitC864052ASTM International takes no position
28、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 riskof infringement of such rights, are entirely their own responsibility.Th
29、is 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 Int
30、ernational Headquarters. Your comments will receive careful consideration 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
31、 below.This standard is copyrighted by ASTM International, 100 Barr 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), 610-832-9
32、555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 2 Standards for Cross-Sectional ToleranceNOTE 1Dimensional tolerances for outside diameters, inside diameters, wall thickness, width, height, and general cross-sectional dimensions ofextrusion.Rubber Manufacturer
33、s AssociationARMA Class 2PrecisionRMA Class 2PrecisionDrawing Designation E2 Drawing Designation E2Dimensions (in inches) Dimensions (in Millimeters)Above Up to Above Up to0 0.06 60.010 0 1.5 60.250.06 0.10 0.014 1.5 2.5 0.350.10 0.16 0.016 2.5 4.0 0.400.16 0.25 0.020 4.0 6.3 0.500.25 0.39 0.027 6.3 10 0.700.39 0.63 0.031 10 16 0.800.63 0.98 0.039 16 25 1.000.98 1.57 0.051 25 40 1.301.57 2.48 0.063 40 63 1.602.48 3.94 0.079 63 100 2.00AAdapted from Rubber Manufacturers Association Handbook, Table 13, Fifth Ed., 1992.C864053
