ASTM_D_5849_-_D_5849M_-_21.pdf

Designation:D5849/D5849M21Standard 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 theyear 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.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 or 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 nonconformancewith 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D41/D41M Specification for Asphalt Primer Used inRoofing,Dampproofing,and WaterproofingD1079 Terminology Relating to Roofing and WaterproofingD5147/D5147M Test Methods for Sampling and TestingModified Bituminous Sheet Material2.2 Canadian General Standards 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 unagedpolymer-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 amplitude 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.NOTE1Other numbers of cycles may be used depending on 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 subjected.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 effect 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.1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.04 on Felts,Fabrics and Bituminous Sheet Materials.Current edition approved Jan.1,2021.Published January 2021.Originallyapproved in 1995.Last previous edition approved in 2020 as D5849/D5849M 07(2020).DOI:10.1520/D5849_D5849M-21.2For 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 the Canadian General Standards Board(CGSB),Gatineau,Canada,K1A 1G6.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.16.Apparatus6.1 Any fatigue apparatus capable of producing cyclic strainat the selected test temperature is suitable.The apparatus shallbe capab