1、Designation: C 711 03 (Reapproved 2009)Standard Test Method forLow-Temperature Flexibility and Tenacity of One-Part,Elastomeric, Solvent-Release Type Sealants1This standard is issued under the fixed designation C 711; the number immediately following the designation indicates the year oforiginal ado
2、ption or, in the case of revision, the year 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 This test method covers determination of the low-temperature flexibilit
3、y and tenacity of one-part, elastomeric,solvent-release type sealants after cyclic high- and low-temperature aging.1.2 The subcommittee with jurisdiction is not aware of anysimilar ISO standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use.
4、It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C 717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRe
5、fer to Terminology C 717 for definitionsof the following terms used in this Test Method: elastomer,elastomeric, joint, sealant, solvent-release sealant.4. Significance and Use4.1 This test method is not intended to simulate an actualuse condition but it will give some indication of the elastomericpr
6、operties or flexibility of a building joint sealant at lowtemperature. It can serve to differentiate between elastomer-based sealants and sealants based on nonelastic binders that canharden or embrittle on aging and crack or lose adhesion whenflexed at low temperature. In addition, it can aid in ide
7、ntifyingsealants that have poor flexibility because they are overex-tended and contain a very low level of elastomeric binder aswell as those sealants having binders that will embrittle at lowtemperature.5. Apparatus5.1 Aluminum Panels, 3, thin, approximately 3 in. (76 mm)wide by 5 in. (127 mm) long
8、 by 0.012 in. (0.30 mm) thick.5.2 Spatula, steel, with thin knife edge.5.3 Template, rectangular, of steel or brass,18 in. (3.2 mm)high, 1 by 334 in. (25 by 95 mm) inside and approximately 2by 434 in. (51 by 121 mm) outside.5.4 Oven, forced-draft type, having a temperature controlledat 158 6 3.6F (7
9、0 6 2C).5.5 Freezer Chest or Cold Box, having a controlled tem-perature of 10 6 5F (23 6 3C).5.6 Mandrel or Rod, with a diameter of14 in. (6.4 mm),with a suitable holder or rack to support it.5.7 Methyl Ethyl Ketone, or similar solvent.6. Sampling6.1 Take the test specimen from a previously unopened
10、container as received from the sealant manufacturer.7. Test Specimens7.1 Prepare three test specimens as follows:7.1.1 Condition the sealant sample in the original closedcontainer for at least5hat73.4 6 3.6F (23 6 2C) and 50 65 % relative humidity.7.1.2 Thoroughly clean template and aluminum panels
11、withsolvent.7.1.3 Center the template on the aluminum panel andcarefully fill it with compound, avoiding air pockets. Strike offthe surface of the compound flat to a uniform18-in. (3.2-mm)thickness.7.1.4 With the thin knife edge of the spatula, cut all aroundthe outside edge of the compound and lift
12、 the template straightup and off leaving the formed sealant on the plate.8. Conditioning8.1 Condition the specimens for at least 24 h at 73.4 63.6F (23 6 2C) and 50 6 5 % relative humidity.9. Procedure9.1 Expose the conditioned specimens three times to thefollowing temperature cycle:16hat1586 3.6F 7
13、0 6 2C!8hat2 106 5F 223 6 3C! (1)9.2 At the end of the third cycle, while it is in the freezerat 10F (23C) bend the panel through 180 over the14-in.(6.4-mm) diameter mandrel with the sealant side uppermost.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants
14、 and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved Jan. 1, 2009. Published March 2009. Originallyapproved in 1972. Last previous edition approved in 2003 as C 711 03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho
15、cken, PA 19428-2959, United States.Perform the bend in not less than 1 s and not more than 1.5 s.Immediately after bending examine the sealant for cracking,separation, delamination, and adhesive failure. Minor surfacecrazing or hairline cracks and minor edge cracking may beignored.10. Report10.1 Rep
16、ort any deep cracking, separation, delamination, oradhesive failure. Fig. 1 illustrates a variety of typical results ofthis test method.11. Precision and Bias11.1 In two separate round-robin tests, four laboratoriestested six sealant samples using this procedure. There wasunanimous agreement in both
17、 cases in rating the same twosamples as showing severe cracking and the same four samplesas showing no cracking or adhesive failure.12. Keywords12.1 elastomeric; flexibility; solvent-release sealant(a) Complete Cracking and Adhesive Failure (b) Severe Cracking(c) No Cracking or Adhesive FailureFIG.
18、1 Low-Temperature Flexibility (Tenacity)C 711 03 (2009)2ASTM 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
19、 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 invited either
20、 for revision of this standard or for additional standardsand should be addressed to ASTM International 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 hea
21、ring 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).C 711 03 (2009)3
