1、Designation: C 736 00 (Reapproved 2006)e1Standard Test Method forExtension-Recovery and Adhesion of Latex Sealants1This standard is issued under the fixed designation C 736; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTESection 3.1 was updated editorially in May 2006.1. Scope1.1 This test method covers a laboratory procedure for thedeterm
3、ination of the extension-recovery and adhesion of latexsealants.1.2 The values stated in SI (metric) units are to be regardedas the standard. The values given in parentheses are providedfor information only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated w
4、ith its use. 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.NOTE 1A related ISO standard is ISO 7389. Users should compare todetermine how the ISO standard differs from
5、 this test method.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and SealantsC 1375 Guide for Substrates Used in Testing Building Sealsand Sealants2.2 ISO Standard:3ISO 7389 Building ConstructionSealantsDeterminationof Elastic Recovery3. Terminology3.1 DefinitionsRefe
6、r to Terminology C 717 for definitionsof the terms used in this test method.4. Summary of Test Method4.1 A joint of prescribed dimensions, between glass andaluminum plates is filled with the sealant. After an agingperiod, the joint width is increased 25 %, the force is removed,and the specimen is pe
7、rmitted to recover. The amount ofrecovery and the percent of adhesion loss are measured.5. Significance and Use5.1 This test method evaluates the performance of a latexsealant in joints subjected to a limited amount of extension.6. Apparatus6.1 Extension Machine that can be operated at a steady rate
8、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 by76.2 mm (14 by 1 by 3 in.). Plates shall conform to GuideC 1375.6.3 Glass Plates, six, 6.4 by 25.4 by 76.2 mm (14 by1by3 in.). Plates shall conform to Guide C 1375.6.4 U Shape
9、d Spacers, six, as shown in Fig. 1(a) made of arigid, 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).7. Sampling7.1 Take the sealant to be tested directly from the con
10、taineras commercially supplied by the manufacturer.8. Test Specimens8.1 Prepare a test specimen as follows: Apply a bead ofsealant, 12.7 by 12.7 by 50.8 mm (12 by12 by 2 in.) betweenparallel glass and anodized aluminum plates as shown in Fig.1(b), using rigid, nonadhering spacer bars. Use the C-clam
11、ps tohold the test assembly during the filling and subsequent curingand handling of the specimens.8.2 Prepare five additional specimens as described in 8.1.NOTE 2The glass and aluminum plates shall be cleaned with methylethyl ketone or similar solvent followed by a thorough cleaning with adetergent
12、solution and a final rinse with distilled or deionized water andthen air dried prior to assembly of specimens.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.30 onAdhesion.Current edition approved May
13、 1, 2006. Published May 2006. Originallyapproved in 1972. Last previous edition approved in 2000 as C 736 00.2For referenced 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 sta
14、ndards Document Summary page onthe ASTM website.3Available from the American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.9. Conditioning9.1 Cure the six
15、test specimens for 7 days at 23 6 1C (73.46 2F) and 50 6 5 % relative humidity, then for 7 days at 506 1C (122 6 2F). After the 14-day cure period condition thespecimens for 2 h at 23 6 1C (73.4 6 2F) and 50 6 5%relative humidity.10. Procedure10.1 Remove the spacers (Fig. 1(c) and insert each speci-
16、men in turn in the extension machine. At the rate of 12.7mm/min (0.5 in./min), extend the joint width 25 % to 15.9 mm(0.625 in.) and hold at this width for 5 min, meanwhileinspecting the sealant for cohesive or adhesive failure, or both.10.2 Release the force and allow the specimen to recover. Ifthe
17、 specimen must be removed from the machine to recover,insert a 15.9-mm (0.625-in.) spacer bar during the transfer andthen immediately remove for recovery.10.3 Allow the specimen to stand with the sealant surfaceuppermost undisturbed for a period of 2 h. Measure the jointwidth at the end of this peri
18、od and determine the percent ofadhesive failure to both glass and aluminum.11. Calculation and Interpretation of Results11.1 Percent RecoveryDetermine the percent recovery, D,as follows:D 5 A 2 B!/A 2 C!# 3 100 (1)where:A = extended joint width = 15.9 mm (0.625 in.) (by defi-nition of procedure),B =
19、 joint width after recovery (as measured), andC = original joint width = 12.7 mm (0.5 in.).11.2 Percent Adhesive FailureDetermine the percent ad-hesive failure to both glass and aluminum by measurement.12. Report12.1 Report for each of the six specimens, the percentrecovery, percent adhesive failure
20、 to both glass and aluminumon all six specimens, and the total area of adhesive failure insquare centimetres (square inches) among the six specimens.13. Precision and Bias413.1 PrecisionThe precision calculations for this testmethod are based on the results of four laboratories testingthree material
21、s, each in triplicate. The results are given inTables 1 and 2.13.1.1 Percent RecoveryAt 95 % confidence a variationof 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 avariation of as much as 57.41
22、% can be expected both within alaboratory and between laboratories (see Table 2).13.2 BiasSince there is no accepted reference materialsuitable for determining the bias for this test method, bias hasnot been determined.14. Keywords14.1 adhesion; latex sealant; recovery4Supporting data is available f
23、rom ASTM Headquarters. Request RR:C24-1025.FIG. 1 Preparation of Test SpecimenTABLE 1 Precision and Bias DataPercent RecoveryMaterialAverageRecovery, %EstimatedStandardDeviation(WithinLaboratory)EstimatedStandardDeviation(BetweenLaboratory)Repeata-bility (In-ternal)Reproduc-ibilityG1 100.00 0.00 0.0
24、0 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, %EstimatedStandardDeviation(WithinLaboratory)EstimatedStandardDeviation(BetweenLaboratory)Repeata-bility (In-ternal)Reproduc-ibilityG1 8.084 20.29
25、20.29 57.41 57.41G2 0.001 0.00 0.00 0.00 0.00G3 0.001 0.00 0.00 0.00 0.00C 736 00 (2006)e12ASTM 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
26、 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 committee and must be reviewed every five years andif not revised, either reapproved or withdraw
27、n. 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 a meeting of theresponsible technical committee, which you may attend. If you feel that your co
28、mments 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 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 736 00 (2006)e13
