1、Designation: C1518 04 (Reapproved 2014)C1518 16Standard Specification forPrecured Elastomeric Silicone Joint Sealants1This standard is issued under the fixed designation C1518; 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 () indicates an editorial change since the last revision or reapproval.1. Scope1.1 Precured elastomeric silicone joint sealants, hereinafter referred to as seal, are manufactured in flat, cured,
3、extruded shapesand are primarily used to span joint openings in construction. This specification describes the properties of applied, flat shapedprecured elastomeric silicone joint sealants, hereinafter referred to as applied seal, that bridge joint openings and are adhered tojoint substrates utiliz
4、ing a liquid applied silicone adhesive sealant, specified by the manufacturer, hereinafter referred to as adhesiveto construction substrates, to seal building openings such as panel joints, metal flashing joints, or other building openings in placeof conventional liquid applied sealants.1.2 Seals ar
5、e applied in three different configurations:1.2.1 As a bridge joint, the seal is applied flat on the surface to cover a joint opening. See Fig. 1.1.2.2 As a beveled bridge joint, the seal is applied on the beveled edge of a substrate to bridge a joint opening. See Fig. 2.1.2.3 As a U-joint, the seal
6、 is applied in a U-configuration within a joint. See Fig. 3.1.3 This specification is for a flat extruded shape.Athree-dimensional shape used at a joint cross section or termination is beingconsidered for future inclusion in the specification.1.4 An applied seal meeting the requirements of this spec
7、ification shall be designated by the manufacturer as to movement classand tear class as described in Section 5.1.5 The values stated in SI units are to be regarded as the standard. The values given in brackets are for information only.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Bu
8、ilding Seals and SealantsC1442 Practice for Conducting Tests on Sealants Using Artificial Weathering ApparatusC1523 Test Method for Determining Modulus, Tear and Adhesion Properties of Precured Elastomeric Joint SealantsD1566 Terminology Relating to RubberG113 Terminology Relating to Natural and Art
9、ificial Weathering Tests of Nonmetallic Materials3. Terminology3.1 Definitions:3.1.1 Refer to Terminology C717 for definitions of the following terms used in this specification: standard, including but notlimited to the following: cohesive failure, adhesive failure, elastomeric, elongation, joint, m
10、odulus, primer, seal, sealant, shelf-life,substrate.3.1.2 Refer to Terminology G113 for definitions related to artificial weathering.3.1.3 Refer to Terminology D1566 for tear.4. Significance and Use4.1 This specification describes several classifications of applied seals as described in Section 5. T
11、he purchaser or designprofessional shall recognize that not all materials meeting this specification are suitable for all applications and substrates. It isessential, therefore, that the proper classification of the seal system is provided for the intended use. The test methods in this1 This specifi
12、cation is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.10 onSpecifications, Guides and Practices.Current edition approved Dec. 1, 2014June 1, 2016. Published December 2014July 2016. Originally approved in 2002. Last
13、previous edition approved in 20092014 asC1518 - 04 (2009).(2014). DOI: 10.1520/C1518-04R14.10.1520/C1518-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the stand
14、ards Document Summary page on the ASTM website.This document is not 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 accuratel
15、y, ASTM recommends that users consult prior editions as appropriate. 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 States1s
16、pecification relate to elastomeric performance, adhesion of the adhesive to the seal and adhesion of the adhesive to the substrate,only as adhesion relates to the test specimens. The standard substrate for qualification to this specification is portland cementmortar. The standard joint configuration
17、 for qualification to this specification is the bridge joint configuration as shown in Fig. 1.Users are advised to have adhesion tests performed in the field on the actual substrate to determine adhesion performance.NOTE 1Other joint configurations such as beveled bridge joint application and/or U-j
18、oint application in place or in addition to the standard jointconfiguration may be specified for the test with the applied seal sample.NOTE 2Other substrates such as EIFS, brick, wood, aluminum, plastic, metal or other in place or in addition to the standard substrate may be specifiedfor the test wi
19、th the applied seal sample.5. Classification5.1 Movement ClassA seal qualifying under this specification shall be classified for movement capability as follows.5.1.1 Movement Class XAn applied seal that when tested for movement as described in Test Method C1523 (9.1) aftersubjecting joint specimens
20、to each of the following: three joint specimens to frozen temperature conditioning as described in TestMethod C1523 (8.2.3) for 24 h; three joint specimens to heat conditioning as described in Test Method C1523 (8.2.4) for 24 h;and three joint specimens to artificial weathering in accordance with Pr
21、actice C1442 as described in Test Method C1523 (8.2.5)for a minimum of 2500 h. The exposure duration shall be sufficient to produce a statistically significant change of the propertyevaluated in a material known to give poor performance when used in the application of interest. After each type of co
22、nditioning,the specimen shall withstand a strain and the holding time at that strain for one hour to X % elongation, where X is 12.5 % orgreater, in increments of 12.5 % to max 200 %. (Test Method C1523, 9.1)5.1.2 Immediately following 5.1.1 the same specimen shall withstand 10 movement cycles of X
23、% elongation where X is thepercentage used in 5.1.1 and relaxation to 0 %.5.2 Tear Class NT, PT and Class TImmediately following 5.1.2 the same specimen shall be tested for tear propagation asdescribed in Test Method C1523 (9.4).FIG. 1 Bridge Joint ConfigurationFIG. 2 Beveled Bridge Joint Configurat
24、ionFIG. 3 U-Joint ConfigurationC1518 1626. General Requirements6.1 StabilityA seal when stored in the original package at temperatures not exceeding 50C 122F shall be capable ofmeeting the requirements of this specification for at least twelve months after the date of manufacture.The shelf-life of t
25、his sealantshall be determined by its manufacturer. When establishing the shelf-life, the manufacturer should also identify acceptableconditions of storage for the sealant.6.2 Color and TextureThe color and texture of the exposed seal surface shall be the color and texture that was agreed uponbetwee
26、n the purchaser and supplier.6.3 ApplicationThe seal system is intended for application to clean, dry substrate surfaces. All laboratory tests shall beperformed using the liquid applied adhesive sealant recommended by the manufacturer of the seal. It shall be recognized that moreadhesive may be nece
27、ssary than indicated in the manufacturers recommendations due to the shape of the seal and/or the type ofsubstrate. Where a primer for a substrate surface is recommended by a manufacturer, all tests on that surface shall include therecommended primer.6.4 Adhesion/CohesionThe applied seal when tested
28、 in accordance with 5.1.1 and 5.1.2 shall have no loss of adhesion orcohesion in bond depth greater than 25 % at any given location along the bond line.6.5 Tear PropagationThe applied seal when tested in accordance with 5.2 for class NT and PT shall have not more than 25mm of defective joint length
29、see Fig. 4. For Tear Class T 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 mm 0.12 in.
30、 A seal qualifying to this specification can be of anythickness, but shall be the same thickness as a seal indicated as qualifying to movement class, modulus and tear characteristics.8. Test Methods8.1 Movement Class:8.1.1 The movement properties shall be tested in accordance with Test Method C1523
31、(8.2.3, 8.2.4, 8.2.5, 9.1).8.2 Modulus:8.2.1 The modulus properties shall be tested in accordance with Test Method C1523 (8.2.3, 8.2.4, 8.2.5, 9.1).8.3 Tear Characterization:8.3.1 Tear characterization shall be tested in accordance with Test Method C1523 (8.2.3, 8.2.4, 8.2.5, 9.4).9. Packaging and P
32、ackage Marking9.1 The seal should be packaged so that it maintains its manufactured shape.9.2 A seal, that meets this specification shall be clearly labeled by the manufacturer:9.2.1 Movement class in accordance with 5.1.1 and 5.1.2.9.2.2 Modulus at strain that represents the movement class, in acco
33、rdance 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; tearNOTE 1Tear propagates perpendicular to the length of the joint as shown above, left; or at any angl
34、e 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 PTC1518 163ASTM International takes no position respecting the validity of any patent rights asserted in connection with any
35、 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.This standard is subject to revision at any time by the responsible technical
36、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
37、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 below.This standard is copyrighted by ASTM International, 100 Barr Harbor Dr
38、ive, 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1Tear propagates nearly parallel to the joint wall and opens one side or both sides.FIG. 5 Class TC1518 164
