1、Designation: D5849/D5849M 07 (Reapproved 2013)1Standard Test Method forEvaluating Resistance of Modified Bituminous RoofingMembrane to Cyclic Fatigue (Joint Displacement)1This standard is issued under the fixed designation D5849/D5849M; the number immediately following the designation indicates they
2、ear of original 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.1NOTEUnits information was editorially corrected in August 2013.
3、1. Scope1.1 This test method determines the effect of constant cyclicdisplacement on polymer-modified bituminous membranespecimens. In this test method, a relatively low travel rate ofcycling is used and the material is tested for a specified numberof cycles under conditions of increased amplitude o
4、r lowertemperature.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately 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 n
5、on-conformancewith the standard.1.3 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 regulatory limitati
6、ons prior to use.2. Referenced Documents2.1 ASTM Standards:2D41 Specification for Asphalt Primer Used in Roofing,Dampproofing, and WaterproofingD1079 Terminology Relating to Roofing and WaterproofingD5147 Test Methods for Sampling and Testing ModifiedBituminous Sheet Material2.2 Canadian General Sta
7、ndards Board Method:3CGSB 37-GP-56M Standard for Membrane, Modified,Bituminous, Prefabricated, and Reinforced for Roofing3. Terminology3.1 For definitions of terms used in this test method, refer toTerminology D1079.4. Summary of Test Method4.1 This test method measures the ability of an unagedpolym
8、er-modified bituminous membrane material to resistdeterioration during 500 cycles (Note 1) at predeterminedtemperature and cycle-amplitude conditions. If the specimenpasses the test under the selected conditions, the severity of thetest is raised by either lowering the temperature or increasingthe a
9、mplitude of the cycle, or both (see Table 1). Similarly,heat-aged specimens are subjected to 200 cycles (Note 1) underthe same conditions of temperature and cycle-amplitude. Testthe membrane until failure or until Test Condition No. 5 isachieved.NOTE 1Other numbers of cycles may be used depending on
10、 the reasonfor conducting the test, for example, to determine the number of cyclesnecessary to produce failure.5. Significance and Use5.1 This test method provides data on classifying polymer-modified bituminous membranes by their performance relatedto the fatigue conditions to which they are subjec
11、ted.5.2 This test method is applicable to testing specimensconsisting of a single ply of the polymer-modified bitumenmaterial or a multiple-ply composite that includes the polymer-modified bitumen material.5.3 This test method is conducted on both unaged andheat-aged specimens to determine the effec
12、t of heat exposureon the membrane materials ability to resist deterioration fromcyclic strain. This test method may also be conducted onspecimens subjected to other laboratory exposure conditionsthat are not specified herein.6. Apparatus6.1 Any fatigue apparatus capable of producing cyclic strainat
13、the selected test temperature is suitable. The apparatus shallbe capable of applying sufficient load to the specimens toachieve the specified displacement. The apparatus shall be1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofingand is the direct responsibili
14、ty of Subcommittee D08.04 on Felts,Fabrics and Bituminous Sheet Materials.Current edition approved August 1, 2013. Published August 2013. Originallyapproved in 1995. Last previous edition approved in 2007 as D5849 07. DOI:10.1520/D5849_D5849M-07R13E01.2For referenced ASTM standards, visit the ASTM w
15、ebsite, 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 the Canadian General Standards Board (CGSB), Gatineau,Canada, K1A 1G6.Copyright ASTM Internat
16、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1capable of changing cycle amplitude depending on the selectedconditions. It has been found that an apparatus using acam-driven mechanism is suitable for this purpose. The am-plitude of the cycle is altered by
17、changing the lift of the cam.6.2 The apparatus shall be capable of cycling the specimensat 16 mm/h 0.011 in./min.6.3 Two concrete slabs (Note 2), 150 by 150 by 50-mm 6by 6 by 2-in. minimum thickness are attached to the fatigueapparatus such that one moves continuously back and forth inrelation to th
18、e other. The gap between the slabs forms the jointover which the specimen cycling occurs. Alternatively, twowooden panels 150 by 150 by 38 mm 6 by 6 by 1.5 in. or steelplates 150 by 150 by 6 mm 6 by 6 by 0.25 in. minimum maybe used. The substrate shall be conditioned at 23 6 1C 73 62F and 50 % relat
19、ive humidity until the slabs, panels, orplates have reached constant moisture content.NOTE 2The concrete slabs are molded, according to usual practice,using a mix design as follows: 1 part ordinary Portland cement; 2 partssand; 5-mm 0.2-in. or less particle size; 4 parts course aggregateconsisting o
20、f one third 10-mm 0.4-in. and two thirds 20-mm 0.8-in.aggregate size. (The water cement ratio is 0.6.)6.3.1 The surface of the slabs to which the specimen isapplied shall be that taken from the bottom of the mold.6.3.2 Braces (metal battens) shall be attached to the sides ofthe slabs, panels, or pla
21、tes to hold them rigid and to set the jointbetween the slabs during placement of the test specimens onthem, and for placing the slabs in the fatigue apparatus.7. Sampling7.1 When sampling entire lots of material, follow theprocedure outlined in Test Methods D5147, Section 3.8. Test Specimens8.1 Test
22、 specimens may be either a single-ply of themembrane material or multiple ply composites prepared inaccordance with the normal procedure used to install themembrane in practice, for example, hot asphalt, cold adhesive,or torch.8.2 The dimensions of the test specimens shall be 300 by 50mm 12 by 2 in.
23、 and oriented such that the weakest tensiledirection is tested, either in the machine direction or cross-machine direction. The weakest orientation may be determinedby a constant rate tension apparatus.8.3 The test specimens shall be new (unexposed) and heatconditioned in accordance with Test Method
24、s D5147 (Section12). In addition, other exposure conditions may be used, and ifso, they shall be described in the test report.9. Cycle Conditions and Specimen Conditioning9.1 Temperature and Amplitude ConditionsSelect thetemperature, initial gap, cycle rate, and cycle-amplitude con-ditions according
25、 to those given in Table 1. See 4.1.10. Test Procedure10.1 Remove the slabs, panels, or plates from the cyclingapparatus and coat with an asphalt primer, which conforms toSpecification D41, and allow the primer to dry.10.2 Using a metal shim, set the initial gap between theslabs, panels, or plates a
26、t either 1 or 2 6 0.05 mm 0.04 or 0.086 0.002 in., depending on the selected test condition in Table1. Attach side braces to maintain the initial gap.10.3 Remove the metal shim and fill the gap with sand toprevent asphalt from entering it during specimen adhesion.10.4 Adhere two test specimens, with
27、 their long dimensionsoriented perpendicular to the gap. The method of adhesionshall be that normally used in practice to install the specimenon the substrate, for example, hot asphalt, cold adhesive, ortorch. Alternatively, in the research of membrane performance,specimens may be adhered to the woo
28、den panels or steel platesusing epoxy adhesive which will not disbond at the specifiedaging and test conditions.10.5 After the specimens have cooled to ambient laboratorytemperature, remove the sand from the gap between theconcrete slabs.10.6 Reattach the slabs to the cycling apparatus, and removeth
29、e side braces from the slabs.10.7 Condition the adhered test specimens at the selectedtest temperature (see Table 1) for a 4-h minimum before thestart of cycling.10.8 Test new (unexposed) specimens for 500 cycles; testexposed specimens for 200 cycles.11. Interpretation of Results11.1 After cycling i
30、s stopped, examine the specimens forvisual evidence of damage experienced during testing. Suchevidence includes cracking, splitting, or tearing of the speci-men over the joint, or loss of adhesion of the specimen to theslabs or panels or between plies of the test specimen. If suchevidence is seen on
31、 either of the two specimens, the specimensare considered to have failed the test. Partial delamination ofthe specimens to the slabs, panels, or plates occurring within 25mm 1 in. of the joint, is allowable but shall be noted in thereport. Buckling of the membrane specimen over the jointwithout crac
32、king, splitting, or tearing damage is also notconsidered to have failed, but shall be noted in the report.11.2 If evidence of damage to the specimens is not seen,they are considered to have passed the test (Note 3).NOTE 3In disputed cases, a water column test may be used toTABLE 1 Test ConditionsTes
33、tConditionTestTemperatureInitial GapSettingCycleAmplitudeCycles/h1 23 1C73 2F1.00.05mm0.04 0.002 in.1.0 mm0.04 in.82 0 1C32 2F1.0 0.05 mm0.04 0.002 in.1.0 mm0.04 in.83 0 1C32 2F2.00.05mm0.08 0.002 in.2.0 mm0.08 in.44 10 1C14 2F2.00.05mm0.08 0.002 in.2.0 mm0.08 in.45 20 1C4 2F2.00.05mm0.08 0.002 in.2
34、.0 mm0.08 in.4D5849/D5849M 07 (2013)12determine the watertight integrity of the system. The test described inCGSB 37-GP-56M is a viable method. If this or another water column testmethod is used, it shall be noted in the report.12. Report12.1 Report the following information:12.1.1 Dates of test ini
35、tiation and termination;12.1.2 The test specimen description, including the numberand type of plies, and whether it was new or exposed;12.1.3 Method of interply adhesion for multiple-ply com-posites;12.1.4 Type of substrate used;12.1.5 Method of adhering the specimens to the substrate;12.1.6 Selecte
36、d test conditions (temperature and amplitude);12.1.7 Description of the cycling apparatus used;12.1.8 Number of cycles;12.1.9 Observations made on the tested specimens; and,12.1.10 How many of the specimens passed or failed thetest.12.2 A permanent record of the report shall be made.13. Retesting13.
37、1 If the specimens failed under Conditions 2 through 5 inTable 1, they shall be retested at a set of conditions less severethan those originally selected. Retest conditions shall be notedin the report.14. Precision and Bias14.1 The precision and bias of this test method has yet to bedetermined.15. K
38、eywords15.1 cyclic displacement; fatigue; polymer modified bitumi-nous membraneASTM 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 vali
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