1、Designation: D 6383 99 (Reapproved 2005)Standard Practice forTime-to-Failure (Creep-Rupture) of Adhesive JointsFabricated from EPDM Roof Membrane Material1This standard is issued under the fixed designation D 6383; the number immediately following the designation indicates the year oforiginal adopti
2、on or, in the case of revision, the year 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.1. Scope1.1 This practice covers sample preparation temperatures,test parameters, and
3、 specimen exposure conditions that areapplicable when Test Method D 5405 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 thelaborat
4、ory 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 scrim-rei
5、nforced, 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 SI units are to be regarded as thestandard. The inch-pound units gi
6、ven in parentheses are forinformation only.1.6 This standard does not purport to address all of thesafety concerns, 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 regu
7、latory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 907 Terminology of AdhesivesD 1079 Terminology Relating to Roofing and Waterproof-ingD 5405 Test Method for Conducting Time-to-Failure(Creep-Rupture) Tests of Joints Fabricated from Nonbitu-minous Organic Roof Membrane Mate
8、rial2.2 SPRI Document:3SPRI Recommended Laboratory Test Methods for LiquidandTapeAdhesives Used to Splice Single-Ply Membranes3. Terminology3.1 DefinitionsFor definitions of terms used in this prac-tice, refer to Terminologies D 907 and D 1079.3.2 Definitions of Terms Specific to This Standard:3.2.1
9、 creep-rupture testa test that measures the time-to-failure of a specimen subjected to a constant load; progressivespecimen 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 m
10、embrane material away from thebonded section of the test specimen (that is, material rupture).3.2.3 time-to-failurethe period 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
11、 and low temperatures using tape or liquid adhesives andEPDM roof membrane material. Creep-rupture tests are thenconducted in accordance with Test Method D 5405 before andafter subjecting these joints to artificial exposure in thelaboratory. The loads are applied in either peel or shearconfiguration
12、s at ambient and elevated temperatures. Table 1summarizes the preparation temperatures, test parameters, andexposure conditions incorporated in this practice.Alternatively,adhesive joints are prepared from EPDM seams sampled fromroofs in service, and then subjected directly to creep-rupturetesting.5
13、. 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 providea means of characterizing the behavior of joints under constantload over time.1This practice is und
14、er 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 May 1, 2005. Published May 2005. Originallyapproved in 1999. Last previous edition approved in 1999 as D 6383
15、 99e1.2For 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 website.3Available from Single Ply Roofing Institute (SPRI), 77
16、 RumfordAve., Suite 3B,Waltham, MA 02453.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1Table 1 is based on the results of an industry governmentconsortium study on creep-rupture resistance (time-to-failure) of EPDMadhesive jo
17、ints.4,5Referral to Footnotes 5 and 6 provides typical time-to-failure 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
18、practice is 9.8 N (2.2 lbf). The peel load under whichthe tests described 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 l
19、oad of 29.4 N (6.6 lbf) corresponds to adead weight of 3-kg (6.6-lbm) mass.5.2 Time-to-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 T
20、his practice, which is specific to EPDM joints, comple-ments Test Method D 5405 that provides 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
21、 joints EPDM roof membranes has shown that speci-mens are less creep-resistant under peel 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 c
22、onditions to which EPDM adhesive seams canbe subjected in service.6. Test Specimen6.1 Laboratory SpecimensPrepare peel specimens andshear specimens as described in Section 8 of Test MethodD 5405. Table 1 lists the seven sample sets for which speci-mens are prepared.6.1.1 Peel Specimen DimensionsThe
23、dimensions of thepeel specimens shall be 125 by 25 mm (5 by 1 in.) 6 2 %. Thebond length shall 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
24、 mm (1 in.) 6 2 %. The bond is locatedat the center of the specimen.6.1.3 EPDM Surface PreparationPrior to bond forma-tion, prepare the surface of the sheet material in accordancewith the EPDM suppliers instructions. Where primers areincorporated in the bonding procedure, apply primers inaccordance
25、with the EPDM suppliers instructions.6.1.4 TemperaturePrepare sample sets at 23 6 2C (73 64F) and at 46 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) sh
26、all be kept atthat temperature until the individual specimens are readied fortesting (for example, placement 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 th
27、e time-to-failuretests shall not exceed 24 h.6.1.5 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 specimens, having the dime
28、nsionsindicated 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 Specimens and Bonded Strength
29、7.1 Prepare a sufficient number of specimens to conductboth bond strength and time-to-failure tests in accordance with9.2 of Test Method D 5405.7.2 Aminimum of eight joint specimens shall be included inthe time-to-failure tests for each of the seven sample sets listedin Table 1.4Rossiter, W. J., Jr.
30、, Vangel, M. G., Embree, E., Kraft, K. 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 and Technol-ogy, May 1996.
31、5Rossiter, W. J., Jr., Vangel, M. G., and 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 Lo
32、ading,” Building Science Series 177, National 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 Arti
33、ficial Exposure Before TestingNumber C F 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 SPR
34、I procedure(See 9.1.2)6 23 73 23 73 Shear 29.4 6.6 None7 23 73 70 158 Shear 29.4 6.6 NoneD 6383 99 (2005)2NOTE 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
35、 than 8specimens. Additionally, for cases where it is anticipated that times-to-failure can be relatively 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
36、 The load shall be within 61 % of that specified asfollows:8.1.1 Peel TestsAt both 23 and 70C (73 and 158F), 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 s
37、ets 4 and 5 (see Table 1) are subjected toartificial exposure prior to conducting the time-to-failure tests.9.1.1 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
38、 elongation where pre-scribed) in accordance with paragraph of 5.4 of SPRI Recom-mended Laboratory Test Methods for Liquid and TapeAdhesives Used to Splice Single-Ply Membranes.10. Procedure10.1 The procedure shall be in accordance with Section 11of Test Method D 5405 with the following exception:10
39、.1.1 Conduct tests for a minimum of 60 days at whichtime it is determined that it is impractical to continue the testsfurther.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 specimen
40、s can have long times-to-failure (forexample, greater than some months) under the loading conditions given inTable 1.11. Report11.1 Report the results of the time-to-failure tests in accor-dance with Section 12 of Test Method D 5405. Include thetemperature and relative humidity at which the samples
41、wereprepared.12. Keywords12.1 adhesive testing; creep; EPDM; joints; laboratory ex-posure; practice; roofing; seams; 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
42、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 committee and must be reviewed every fi
43、ve years andif not revised, either reapproved or withdrawn. 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
44、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.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).D 6383 99 (2005)3
