1、Designation: D6383/D6383M 99 (Reapproved 2015)Standard Practice forTime-to-Failure (Creep-Rupture) of Adhesive JointsFabricated from EPDM Roof Membrane Material1This standard is issued under the fixed designation D6383/D6383M; the number immediately following the designation indicates theyear of ori
2、ginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers sample preparation temperatures,test para
3、meters, and specimen exposure conditions that areapplicable when Test Method D5405 is used for conductingtime-to-failure (creep-rupture) tests of adhesive joints fabri-cated from ethylene-propylene-diene terpolymer (EPDM) roofmembrane material.1.2 This practice is applicable to joints fabricated in
4、thelaboratory from EPDM roof membrane materials and adhe-sives received from suppliers, and to joints prepared fromEPDM seams sampled from field installations.1.3 The joints are bonded using preformed tape or liquid-based adhesives, and EPDM roof membrane materials that arenon-reinforced, fabric- or
5、 scrim-reinforced, and fabric backed.Primers are also used as recommended for the specific adhe-sive.1.4 This practice contains notes that are explanatory and arenot part of the mandatory requirements of this practice.1.5 The values stated in either SI units or inch-pound unitsare to be regarded sep
6、arately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 This standard does not purport to address all of thesafety concer
7、ns, if any, associated with 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 the regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D907 Terminology of AdhesivesD1079 Te
8、rminology Relating to Roofing and WaterproofingD5405 Test Method for Conducting Time-to-Failure (Creep-Rupture) Tests of Joints Fabricated from NonbituminousOrganic Roof Membrane Material2.2 SPRI Document:3SPRI Recommended Laboratory Test Methods for Liquidand TapeAdhesives Used to Splice Single-Ply
9、 Membranes3. Terminology3.1 DefinitionsFor definitions of terms used in thispractice, refer to Terminologies D907 and D1079.3.2 Definitions of Terms Specific to This Standard:3.2.1 creep-rupture testa test that measures the time-to-failure of a specimen subjected to a constant load; progressivespeci
10、men deformation may also be measured.3.2.2 failurerupture of the bond resulting in completeseparation of its adherents under the test conditions; or,alternatively, rupture of the membrane material away from thebonded section of the test specimen (that is, material rupture).3.2.3 time-to-failurethe p
11、eriod of time beginning when ajoint specimen is placed under load and ending when failureoccurs.4. Summary of Practice4.1 Adhesive joints are prepared in the laboratory at ambi-ent and low temperatures using tape or liquid adhesives andEPDM roof membrane material. Creep-rupture tests are then1This p
12、ractice is under the jurisdiction ofASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.18 on Nonbi-tuminous Organic Roof Coverings.Current edition approved Dec. 1, 2015. Published December 2015. Originallyapproved in 1999. Last previous edition approv
13、ed in 2011 as D6383/D6383M 99(2011)1. DOI: 10.1520/D6383_D6383M-99R15.2For 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 standards Document Summary page onthe ASTM
14、 website.3Available from Single Ply Roofing Institute (SPRI), 77 RumfordAve., Suite 3B,Waltham, MA 02453.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1conducted in accordance with Test Method D5405 before andafter subjecting these j
15、oints to artificial exposure in thelaboratory. The loads are applied in either peel or shearconfigurations at ambient and elevated temperatures. Table 1summarizes the preparation temperatures, test parameters, andexposure conditions incorporated in this practice.Alternatively,adhesive joints are pre
16、pared from EPDM seams sampled fromroofs in service, and then subjected directly to creep-rupturetesting.5. Significance and Use5.1 An important factor affecting the performance of seamsof EPDM membranes is their ability to remain bonded over themembranes expected service life. Time-to-failure tests
17、providea means of characterizing the behavior of joints under constantload over time.NOTE 1Table 1 is based on the results of an industry governmentconsortium study on creep-rupture resistance (time-to-failure) of EPDMadhesive joints.4,5Referral to Footnotes 5 and 6 provides typical time-to-failure
18、data, developed under the conditions in Table 1, for EPDM jointsfabricated in the laboratory with nonreinforced EPDM roof membranematerial, butyl-based tapes, and liquid adhesives. It is noted that the peelload specified in this practice is 9.8 N 2.2 lbf. The peel load under whichthe tests described
19、 in Footnotes 4 and 5 were conducted was 9.3 N 2.1lbf. A load of 9.8 N 2.2 lbf corresponds to 1 kgf 2.2 lbf, and deadweights of 1-kg 2.2-lbm mass are available through laboratory equip-ment supply houses. Similarly, a load of 29.4 N 6.6 lbf corresponds to adead weight of 3-kg 6.6-lbm mass.5.2 Time-t
20、o-failure tests complement other mechanical testssuch as strength for characterizing joints of EPDM roofmembranes, and can be incorporated in specifications foradhesives for joining EPDM roof membrane material.5.3 This practice, which is specific to EPDM joints, comple-ments Test Method D5405 that p
21、rovides general requirementsfor the preparation and creep-rupture testing of joints fabri-cated from any nonbituminous organic roof membrane mate-rial.5.4 Laboratory experience in conducting time-to-failuretests of joints EPDM roof membranes has shown that speci-mens are less creep-resistant under p
22、eel loading than undershear loading. Consequently, the majority of the tests stipulatedin this practice are performed under peel loading.5.5 This practice does not develop time-to-failure data on allenvironmental conditions to which EPDM adhesive seams canbe subjected in service.6. Test Specimen6.1
23、Laboratory SpecimensPrepare peel specimens andshear specimens as described in Section 8 of Test MethodD5405. Table 1 lists the seven sample sets for which specimensare prepared.6.1.1 Peel Specimen DimensionsThe dimensions of thepeel specimens shall be 125 by 25 mm 5 by 1 in. 6 2 %. Thebond length sh
24、all be 75 mm 3 in. 6 2 %. The bond is locatedat one end of the specimen.6.1.2 Shear Specimen DimensionsThe dimensions of theshear specimens shall be 150 by 25 mm 6 by 1 in. 6 2 %. Thebond length shall be 25 mm 1 in. 6 2 %. The bond is locatedat the center of the specimen.6.1.3 EPDM Surface Preparati
25、onPrior to bond formation,prepare the surface of the sheet material in accordance with theEPDM suppliers instructions. Where primers are incorporatedin the bonding procedure, apply primers in accordance with theEPDM suppliers instructions.6.1.4 TemperaturePrepare sample sets at 23 6 2C 73 64F and at
26、 4 6 2C 25 6 4F; report the preparationtemperature. Use a temperature controlled chamber or similarmeans, if necessary, to achieve the specified temperatureregulation. Samples prepared at 4C 25F shall be kept atthat temperature until the individual specimens are readied fortesting (for example, plac
27、ement in the test chamber, and othersteps conducted before testing). The temperature at whichspecimens are readied shall be 23 6 2C 73 6 4F. The timebetween readying for testing and conducting the time-to-failuretests shall not exceed 24 h.4Rossiter, W. J., Jr., Vangel, M. G., Embree, E., Kraft, K.
28、M., and Seiler, J. F.,Jr., “Performance of Tape-Bonded Seams of EPDM Membranes: Comparison of thePeel Creep-Rupture Response of Tape-Bonded and Liquid-Adhesive-BondedSeams,” Building Science Series 175, National Institute of Standards andTechnology, May 1996.5Rossiter, W. J., Jr., Vangel, M. G., and
29、 Kraft, K. M., “Performance ofTape-Bonded Seams of EPDM Membranes: Comparison of the Creep-RupturePerformance of Tape-Bonded and Liquid-Adhesive-Bonded Samples asAffected byTest Temperature, Exposure Prior to Testing, Cold Temperature Preparation, andShear Loading,” Building Science Series 177, Nati
30、onal Institute of Standards andTechnology (July 1998).TABLE 1 Summary of the Sample Preparation Temperature, Test Parameters, and Exposure Conditions Incorporated in the PracticeSampleSetSamplePreparationTemperatureTest ParametersTemperature Loading Load Artificial Exposure Before TestingNumber C F
31、C F Peel N lbf Conditions1 23 73 23 73 Peel 9.8 2.2 None2 23 73 70 158 Peel 9.8 2.2 None3 4 25 23 73 Peel 9.8 2.2 None4 23 73 23 73 Peel 9.8 2.2 Heat: 90C 194F for 90 days5 23 73 23 73 Peel 9.8 2.2 Dry heat, wet heat, and freeze-thawcycling according to SPRI procedure(See 9.1.2)6 23 73 23 73 Shear 2
32、9.4 6.6 None7 23 73 70 158 Shear 29.4 6.6 NoneD6383/D6383M 99 (2015)26.1.5 HumidityPrepare specimens at ambient humidity;report the relative humidity during preparation. Condensationshall not be visible when preparing the specimens at the coldertemperature.6.2 Field Specimens:6.2.1 Peel and shear sp
33、ecimens, having the dimensionsindicated in 6.1.1 and 6.1.2, respectively, can be prepared fromseams sampled from roofs in service.6.2.2 Record all available pertinent information including,but not limited to, sample age, adhesive type, EPDM sheettype, and location of the roof.7. Number of Test Speci
34、mens and Bonded Strength7.1 Prepare a sufficient number of specimens to conductboth bond strength and time-to-failure tests in accordance with9.2 of Test Method D5405.7.2 Aminimum of eight joint specimens shall be included inthe time-to-failure tests for each of the seven sample sets listedin Table
35、1.NOTE 2Sample sets having more than 8 specimens can be necessaryunder some test conditions. In particular, experimental designs thatinclude probabilistic methods of data analysis can require more than 8specimens. Additionally, for cases where it is anticipated that times-to-failure can be relativel
36、y long (that is, greater than some months), and thetest can be terminated before all specimens in the set fail (see 10.1.1),sample sets containing more than 8 specimens are recommended.8. Loads8.1 The load shall be within 61 % of that specified asfollows:8.1.1 Peel TestsAt both 23 and 70C 73 and 158
37、F, theload shall be 9.8 N 2.2 lbf.8.1.2 Shear TestsAt both 23 and 70C 73 and 158F, theload shall be 29.4 N 6.6 lbf.9. Artificial Exposure Before Conducting Time-to-FailureTests9.1 Sample sets 4 and 5 (see Table 1) are subjected toartificial exposure prior to conducting the time-to-failure tests.9.1.
38、1 Heat ExposureExpose the test specimens in a forcedair oven at 90 6 1C 194 6 2F for 90 days 614 day.9.1.2 Dry Heat, Wet Heat, and Freeze-Thaw CyclingExpose the test specimens (including elongation where pre-scribed) in accordance with paragraph of 5.4 of SPRI Recom-mended Laboratory Test Methods fo
39、r Liquid and TapeAdhesives Used to Splice Single-Ply Membranes.10. Procedure10.1 The procedure shall be in accordance with Section 11of Test Method D5405 with the following exception:10.1.1 Conduct tests for a minimum of 60 days at whichtime it is determined that it is impractical to continue the te
40、stsfurther.NOTE 3The determination of whether to continue the tests can dependon the analyses and interpretation of the data, and on the judgment of theexperimenter. Some shear specimens can have long times-to-failure (forexample, greater than some months) under the loading conditions given inTable
41、1.11. Report11.1 Report the results of the time-to-failure tests in accor-dance with Section 12 of Test Method D5405. Include thetemperature and relative humidity at which the samples wereprepared.12. Keywords12.1 adhesive testing; creep; EPDM; joints; laboratory ex-posure; practice; roofing; seams;
42、 test conditions; time-to-failureASTM 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 rights, and the riskof
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45、r 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 con
46、tacting 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:/ 99 (2015)3
