ASTM C711-2014 Standard Test Method for Low-Temperature Flexibility and Tenacity of One-Part Elastomeric Solvent-Release Type Sealants《单一组份的弹性溶剂释放型密封料的低温挠性和韧性的标准试验方法》.pdf

1、Designation: C711 03 (Reapproved 2009)C711 14Standard Test Method forLow-Temperature Flexibility and Tenacity of One-Part,Elastomeric, Solvent-Release Type Sealants1This standard is issued under the fixed designation C711; the number immediately following the designation indicates the year oforigina

2、l adoption 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 flexi

3、bility 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 any similar ISO standard.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in paren

4、theses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropria

5、te safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitions of the following terms used in this Te

6、st Method: elastomer,elastomeric, joint, sealant, solvent-release sealant. sealant, standard conditions.4. Significance and Use4.1 This test method is not intended to simulate an actual use condition but it will give some indication of the elastomericproperties or flexibility of a building joint sea

7、lant at low temperature. It can serve to differentiate between elastomer-based sealantsand sealants based on nonelastic binders that can harden or embrittle on aging and crack or lose adhesion when flexed at lowtemperature. In addition, it can aid in identifying sealants that have poor flexibility b

8、ecause they are overextended and contain avery low level of elastomeric binder as well as those sealants having binders that will embrittle at low temperature.5. Apparatus5.1 Aluminum Panels, 3, thin, approximately 3 in. (76 mm) wide by 5 in. (127 mm) long by 0.012 in. (0.30 mm) thick.5.2 Spatula, s

9、teel, 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 2 by434 in. (51 by 121 mm) outside.5.4 Oven, forced-draft type, having a temperature controlled at 158 6 3.6F (70 6 2C).5.5 Freezer Chest or Cold Box, ha

10、ving a controlled temperature of 10 6 5F (23 6 3C).5.6 Mandrel or Rod, with a diameter of 14 in. (6.4 mm), with a suitable holder or rack to support it.5.7 Methyl Ethyl Ketone, or similar solvent.1 This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealantsand is

11、the direct responsibility of Subcommittee C24.20 on GeneralTest Methods.Current edition approved Jan. 1, 2009July 1, 2014. Published March 2009August 2014. Originally approved in 1972. Last previous edition approved in 20032009 asC711 03.C711 03(2009). DOI: 10.1520/C0711-03R09.10.1520/C0711-14.2 For

12、 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 standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to prov

13、ide 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 appropriate. In all cases only the current versionof the

14、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 States16. Sampling6.1 Take the test specimen from a previously unopened container as received from the sealant manufactur

15、er.7. Test Specimens7.1 Prepare three test specimens as follows:7.1.1 Condition the sealant sample in the original closed container for at least 5 h at 73.4 6 3.6F (23 6 2C) and 50 6 5 %relative humidity.24 h at standard conditions.7.1.2 Thoroughly clean template and aluminum panels with solvent.(a)

16、 Complete Cracking and Adhesive Failure (b) Severe Cracking(c) No Cracking or Adhesive FailureFIG. 1 Low-Temperature Flexibility (Tenacity)C711 1427.1.3 Center the template on the aluminum panel and carefully fill it with compound, avoiding air pockets. Strike off the surfaceof the compound flat to

17、a uniform 18-in. (3.2-mm) thickness.7.1.4 With the thin knife edge of the spatula, cut all around the outside edge of the compound and lift the template straight upand off leaving the formed sealant on the plate.8. Conditioning8.1 Condition the specimens for at least 24 h at 73.4 6 3.6F (23 6 2C) an

18、d 50 6 5 % relative humidity. standard conditions.9. Procedure9.1 Expose the conditioned specimens three times to the following temperature cycle:16 hat 15863.6F7062C! (1)8hat21065F22363C!9.2 At the end of the third cycle, while it is in the freezer at 10F (23C) bend the panel through 180 over the 1

19、4-in.(6.4-mm) diameter mandrel with the sealant side uppermost. 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 surface crazingor hairline cracks and minor edge cracking ma

20、y be ignored.10. Report10.1 Report any deep cracking, separation, delamination, or adhesive failure. Fig. 1 illustrates a variety of typical results of thistest method.11. Precision and Bias11.1 In two separate round-robin tests, four laboratories tested six sealant samples using this procedure. The

21、re was unanimousagreement in both cases in rating the same two samples as showing severe cracking and the same four samples as showing nocracking or adhesive failure.12. Keywords12.1 elastomeric; flexibility; solvent-release sealantASTM International takes no position respecting the validity of any

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