ASTM C736-2012 Standard Test Method for Extension-Recovery and Adhesion of Latex Sealants 《胶乳密封化合物的伸缩性及粘着力的试验方法》.pdf

1、Designation:C73600(Reapproved2006)1Designation: C736 12Standard Test Method forExtension-Recovery and Adhesion of Latex Sealants1This standard is issued under the fixed designation C736; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi

2、on, 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.1NOTESection 3.1 was updated editorially in May 2006.1. Scope1.1 This test method covers a laboratory procedure fo

3、r the determination of the extension-recovery and adhesion of latexsealants.1.2 The values stated in SI (metric) units are to be regarded as the standard. The values given in parentheses are provided forinformation only.1.3 This standard does not purport to address all of the safety concerns, if any

4、, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.NOTE 1A related ISO standard is ISO 7389. Users should compare to determine how the ISO standard

5、differs from this test method.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and SealantsC1375 Guide for Substrates Used in Testing Building Seals and Sealants2.2 ISO Standard:3ISO 7389 Building ConstructionSealantsDetermination of Elastic Recovery3. Terminology3.1 Def

6、initionsRefer to Terminology C717 for definitions of the terms used in this test method.4. Summary of Test Method4.1 A joint of prescribed dimensions, between glass and aluminum plates is filled with the sealant. After an aging period, thejoint width is increased 25 %, the force is removed, and the

7、specimen is permitted to recover. The amount of recovery and thepercent of adhesion loss are measured.5. Significance and Use5.1 This test method evaluates the performance of a latex sealant in joints subjected to a limited amount of extension.6. Apparatus6.1 Extension Machine that can be operated a

8、t a steady rate of 12.7 mm/min (0.5 in./min) and held at constant extension for5 min.6.2 Aluminum Alloy Plates, six, anodized, 6.4 by 25.4 by 76.2 mm (14 by 1 by 3 in.). Plates shall conform to Guide C1375.6.3 Glass Plates, six, 6.4 by 25.4 by 76.2 mm (14 by 1 by 3 in.). Plates shall conform to Guid

9、e C1375.6.4 U Shaped Spacers, six, as shown in Fig. 1(a) made of a rigid, nonadhering material such as polyethylene, TFE-fluorocarbon,or release-covered metal.6.5 Metal C Clamps, twelve.6.6 Circulating Air Oven, capable of maintaining 50 6 1C (122 6 2F).1This test method is under the jurisdiction of

10、 ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.30 C24.20 onAdhesion. General Test Methods.Current edition approved MayJune 1, 2006.2012. Published May 2006.June 2012. Originally approved in 1972. Last previous edition approved in 20002006 asC7

11、36 00(2006)1. DOI: 10.1520/C0736-00R06E01.10.1520/C0736-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.

12、3Available from the American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.1This 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 tec

13、hnically possible to adequately depict all changes accurately, 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

14、 Box C700, West Conshohocken, PA 19428-2959, United States.7. Sampling7.1 Take the sealant to be tested directly from the container as commercially supplied by the manufacturer.FIG. 1 Preparation of Test SpecimenTABLE 1 Precision and Bias DataPercent RecoveryMaterialAverageRecovery, %EstimatedStanda

15、rdDeviation(WithinLaboratory)EstimatedStandardDeviation(BetweenLaboratory)Repeata-bility (In-ternal)Reproduc-ibilityG1 100.00 0.00 0.00 0.00 0.00G2 91.67 14.43 20.41 40.85 57.77G3 100.00 0.00 0.00 0.00 0.00TABLE 2 Precision and Bias DataPercent Adhesion LossMaterialAverageAdhesionLoss, %EstimatedSta

16、ndardDeviation(WithinLaboratory)EstimatedStandardDeviation(BetweenLaboratory)Repeata-bility (In-ternal)Reproduc-ibilityG1 8.084 20.29 20.29 57.41 57.41G2 0.001 0.00 0.00 0.00 0.00G3 0.001 0.00 0.00 0.00 0.00C736 1228. Test Specimens8.1 Prepare a test specimen as follows: Apply a bead of sealant, 12.

17、7 by 12.7 by 50.8 mm (12 by12 by 2 in.) between parallelglass and anodized aluminum plates as shown in Fig. 1(b), using rigid, nonadhering spacer bars. Use the C-clamps to hold the testassembly during the filling and subsequent curing and handling of the specimens.8.2 Prepare five additional specime

18、ns as described in 8.1.NOTE 2The glass and aluminum plates shall be cleaned with methyl ethyl ketone or similar solvent followed by a thorough cleaning with a detergentsolution and a final rinse with distilled or deionized water and then air dried prior to assembly of specimens.9. Conditioning9.1Cur

19、e the six test specimens for 7 days at 23 6 1C (73.4 6 2F) and 50 6 5% relative humidity, then for 7 days at 50 61C (122 6 2F). After the 14-day cure period condition the specimens for2hat236 1C (73.4 6 2F) and 50 6 5% relativehumidity.9.1 Cure the six test specimens for 7 days at standard condition

20、s, then for 7 days at 50 6 1C (122 6 2F). After the 14-daycure period, condition the specimens for2hatstandard conditions.10. Procedure10.1 Remove the spacers (Fig. 1(c) and insert each specimen in turn in the extension machine. At the rate of 12.7 mm/min (0.5in./min), extend the joint width 25 % to

21、 15.9 mm (0.625 in.) and hold at this width for 5 min, meanwhile inspecting the sealantfor cohesive or adhesive failure, or both.10.2 Release the force and allow the specimen to recover. If the specimen must be removed from the machine to recover, inserta 15.9-mm (0.625-in.) spacer bar during the tr

22、ansfer and then immediately remove for recovery.10.3 Allow the specimen to stand with the sealant surface uppermost undisturbed for a period of 2 h. Measure the joint widthat the end of this period and determine the percent of adhesive failure to both glass and aluminum.11. Calculation and Interpret

23、ation of Results11.1 Percent RecoveryDetermine the percent recovery, D, as follows:D 5 A 2 B!/A 2 C!# 3 100 (1)C0736-12_1where:A = extended joint width = 15.9 mm (0.625 in.) (by definition of procedure),B = joint width after recovery (as measured), andC = original joint width = 12.7 mm (0.5 in.).11.

24、2 Percent Adhesive FailureDetermine the percent adhesive failure to both glass and aluminum by measurement.12. Report12.1 Report for each of the six specimens, the percent recovery, percent adhesive failure to both glass and aluminum on all sixspecimens, and the total area of adhesive failure in squ

25、are centimetres (square inches) among the six specimens.13. Precision and Bias413.1 PrecisionThe precision calculations for this test method are based on the results of four laboratories testing threematerials, each in triplicate. The results are given in Tables 1 and 2.13.1.1 Percent RecoveryAt 95

26、% confidence a variation of as much as 40.85 % can be expected within a laboratory and57.77 % between laboratories (see Table 1).13.1.2 Percent Adhesive FailureAt 95 % confidence a variation of as much as 57.41 % can be expected both within alaboratory and between laboratories (see Table 2).13.2 Bia

27、sSince there is no accepted reference material suitable for determining the bias for this test method, bias has not beendetermined.14. Keywords14.1 adhesion; latex sealant; recoveryASTM International takes no position respecting the validity of any patent rights asserted in connection with any item

28、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 commit

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30、ting 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.4Supporting data is available from ASTM Headquarters. Request RR:C24-1025.C

31、736 123This 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C736 124