1、Designation: C 1518 04Standard Specification forPrecured Elastomeric Silicone Joint Sealants1This standard is issued under the fixed designation C 1518; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A n
2、umber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 Precured elastomeric silicone joint sealants, hereinafterreferred to as seal, are manufactured in flat, cured, extrudedshapes and are p
3、rimarily used to span joint openings inconstruction. This specification describes the properties ofapplied, flat shaped precured elastomeric silicone joint seal-ants, hereinafter referred to as applied seal, that bridge jointopenings and are adhered to joint substrates utilizing a liquidapplied sili
4、cone adhesive sealant, specified by the manufac-turer, hereinafter referred to as adhesive to construction sub-strates, to seal building openings such as panel joints, metalflashing joints, or other building openings in place of conven-tional liquid applied sealants.1.2 Seals are applied in three di
5、fferent configurations:1.2.1 As a bridge joint, the seal is applied flat on the surfaceto cover a joint opening. See Fig. 1.1.2.2 As a beveled bridge joint, the seal is applied on thebeveled edge of a substrate to bridge a joint opening. See Fig.2.1.2.3 As a U-joint, the seal is applied in a U-confi
6、gurationwithin a joint. See Fig. 3.1.3 This specification is for a flat extruded shape. A three-dimensional shape used at a joint cross section or terminationis being considered for future inclusion in the specification.1.4 An applied seal meeting the requirements of this speci-fication shall be des
7、ignated by the manufacturer as to move-ment class and tear class as described in Section 5.1.5 The values stated in SI units are to be regarded as thestandard. The values given in brackets are for information only.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and Sea
8、lantsC 1442 Practice for Conducting Test on Sealants UsingArtificial Weathering ApparatusC 1523 Test Method for Determining Modulus, Tear andAdhesion Properties of Precured Elastomeric Joint Seal-antsD 1566 Terminology Relating to RubberG 113 Terminology Relating to Natural and ArtificialWeathering
9、Tests of Nonmetallic Materials3. Terminology3.1 Definitions:3.1.1 Refer to Terminology C 717 for definitions of thefollowing terms used in this specification: cohesive failure,adhesive failure, elastomeric, elongation, joint, modulus,primer, seal, sealant, substrate.3.1.2 Refer to Terminology G 113
10、for definitions related toartificial weathering.3.1.3 Refer to Terminology D 1566 for tear.4. Significance and Use4.1 This specification describes several classifications ofapplied seals as described in Section 5. The purchaser or designprofessional shall recognize that not all materials meeting thi
11、sspecification are suitable for all applications and substrates. Itis essential, therefore, that the proper classification of the sealsystem is provided for the intended use. The test methods inthis specification relate to elastomeric performance, adhesion1This specification is under the jurisdictio
12、n of ASTM Committee C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.10on Specifications, Guides and Practices.Current edition approved May 1, 2004. Published May 2004. Originallyapproved in 2002. Last previous edition approved in 2002 as C 1518 - 02.2For refere
13、nced 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West
14、Conshohocken, PA 19428-2959, United States.of the adhesive to the seal and adhesion of the adhesive to thesubstrate, only as adhesion relates to the test specimens. Thestandard substrate for qualification to this specification isportland cement mortar. The standard joint configuration forqualificati
15、on to this specification is the bridge joint configura-tion as shown in Fig. 1. Users are advised to have adhesiontests performed in the field on the actual substrate to determineadhesion performance.NOTE 1Other joint configurations such as beveled bridge joint appli-cation and/or U-joint applicatio
16、n in place or in addition to the standardjoint configuration may be specified for the test with the applied sealsample.NOTE 2Other substrates such as EIFS, brick, wood, aluminum,plastic, metal or other in place or in addition to the standard substrate maybe specified for the test with the applied se
17、al sample.5. Classification5.1 Movement ClassA seal qualifying under this specifi-cation shall be classified for movement capability as follows.5.1.1 Movement Class XAn applied seal that when testedfor movement as described in Test Method C 1523 (9.1) aftersubjecting joint specimens to each of the f
18、ollowing: three jointspecimens to frozen temperature conditioning as described inTest Method C 1523 (8.2.3) for 24 h; three joint specimens toheat conditioning as described in Test Method C 1523 (8.2.4)for 24 h; and three joint specimens to artificial weathering inaccordance with Practice C 1442 as
19、described in Test MethodC 1523 (8.2.5) for a minimum of 2500 h. The exposureduration shall be sufficient to produce a statistically significantchange of the property evaluated in a material known to givepoor performance when used in the application of interest.After each type of conditioning, the sp
20、ecimen shall withstanda strain and the holding time at that strain for one hour to X %elongation, where X is 12.5 % or greater, in increments of12.5 % to max 200 %. (Test Method C 1523, 9.1)5.1.2 Immediately following 5.1.1 the same specimen shallwithstand 10 movement cycles of X % elongation where
21、X isthe percentage used in 5.1.1 and relaxation to 0 %.5.2 Tear Class NT, PT and Class TImmediately following5.1.2 the same specimen shall be tested for tear propagation asdescribed in Test Method C 1523 (9.4).6. General Requirements6.1 StabilityA seal when stored in the original package attemperatu
22、res not exceeding 50C 122F shall be capable ofmeeting the requirements of this specification for at leasttwelve months after the date of manufacture.6.2 Color and TextureThe color and texture of the ex-posed seal surface shall be the color and texture that wasagreed upon between the purchaser and su
23、pplier.6.3 ApplicationThe seal system is intended for applica-tion to clean, dry substrate surfaces. All laboratory tests shallbe performed using the liquid applied adhesive sealant recom-mended by the manufacturer of the seal. It shall be recognizedthat more adhesive may be necessary than indicated
24、 in themanufacturers recommendations due to the shape of the sealand/or the type of substrate. Where a primer for a substratesurface is recommended by a manufacturer, all tests on thatsurface shall include the recommended primer.6.4 Adhesion/CohesionThe applied seal when tested inaccordance with 5.1
25、.1 and 5.1.2 shall have no loss of adhesionor cohesion in bond depth greater than 25 % at any givenlocation along the bond line.6.5 Tear PropagationThe applied seal when tested inaccordance with 5.2 for class NT and PT shall have not morethan 25 mm of defective joint length see Fig. 4. For Tear Clas
26、sT the length of defective joint will exceed 25 mm, see Fig. 5.7. Physical Requirements7.1 Flat manufactured seals are provided in different widths,usually from 25 mm 1 in. to 150 mm 6 in. in 12 mm 0.5 in.increments and thickness usually from 1 mm 0.04 in. to 3 mm0.12 in. A seal qualifying to this s
27、pecification can be of anythickness, but shall be the same thickness as a seal indicated asqualifying to movement class, modulus and tear characteristics.8. Test Methods8.1 Movement Class:8.1.1 The movement properties shall be tested in accor-dance with Test Method C 1523 (8.2.3, 8.2.4, 8.2.5, 9.1).
28、8.2 Modulus:8.2.1 The modulus properties shall be tested in accordancewith Test Method C 1523 (8.2.3, 8.2.4, 8.2.5, 9.1).FIG. 1 Bridge Joint ConfigurationFIG. 2 Beveled Bridge Joint ConfigurationFIG. 3 U-Joint ConfigurationC15180428.3 Tear Characterization:8.3.1 Tear characterization shall be tested
29、 in accordancewith Test Method C 1523 (8.2.3, 8.2.4, 8.2.5, 9.4).9. Packaging and Package Marking9.1 The seal should be packaged so that it maintains itsmanufactured shape.9.2 A seal, that meets this specification shall be clearlylabeled by the manufacturer:9.2.1 Movement class in accordance with 5.
30、1.1 and 5.1.2.9.2.2 Modulus at strain that represents the movement class,in accordance with 5.1.1.9.2.3 Tear characterization in accordance with 5.2.10. Keywords10.1 adhesion; adhesive-sealant; bond-line; elastomeric;joint; precured; precured elastomeric joint sealant; seal; tearNOTETear propagates
31、perpendicular to the length of the joint as shown above, left; or at any angle leading to the joint wall as shown above, right.In each case tear stops at the joint wall with an intact unbroken joint length on both sides of at least 12.5 mm.FIG. 4 Class PTNOTETear propagates nearly parallel to the jo
32、int wall and opens one side or both sides.FIG. 5 Class TC1518043ASTM 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 suc
33、h 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 responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invite
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35、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 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), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C1518044
