ASTM_D_2523_-_D_2523M_-_13_2019e1.pdf

Designation:D2523/D2523M13(Reapproved 2019)1Standard Practice forTesting Load-Strain Properties of Roofing Membranes1This standard is issued under the fixed designation D2523/D2523M;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.1NOTEUnits information was editorially revised in January 2019.1.Scope1.1 This practice is a guide for determining the load-strainproperties of roofing membranes and their components atvarious temperatures.Test specimens may be prepared in thelaboratory or cut from samples obtained in the field.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.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:2D95 Test Method for Water in Petroleum Products andBituminous Materials by DistillationD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionE178 Practice for Dealing With Outlying Observations3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 roofing membranethat part of the roofing systemwhose primary function is to exclude water;it does not includefield-applied aggregate.4.Significance and Use4.1 This practice is designed to aid those interested in theengineering properties of roofing membranes.4.2 The data obtained will not permit prediction of theservice life of a membrane under field conditions.The data willprovide a basis for study of the mechanical properties of themembrane.Note that if strain rates,specimen dimensions,initial clear distance between clamps,or temperatures andmoisture contents are varied,the data may not be strictlycomparable.5.Sampling5.1 Take field membrane sample at least 100 by 250 mm 4by 10 in.in accordance with good roofing practices.In caseswhere field-applied aggregate is in place,remove it with ascraper such as a heated putty knife.5.1.1 Sample those areas of the membrane that are expectedto represent the extremes in load/strain characteristics.5.1.2 At least one sample is required for each test tempera-ture at which it is desired to determine load/strain properties.5.2 Prepare laboratory samples at least 200 by 300 mm 8by 12 in.in strict accordance with the roofing specificationbeing tested.Observe all cautions specified,such as notoverheating the bitumen.Do not oven condition any of thecomponents or the final sample.5.2.1 Select those areas of the membrane that are expectedto represent the extremes in load-strain characteristics.Prepareat least one sample of each type for each proposed testtemperature.If there is any doubt about these areas,include allpossible variations.The samples must be uniform in crosssection.5.2.2 Select materials at random when possible.Compo-nents should be conditioned at 50 6 5%relative humidity and25 6 2.5C 77 6 4.5F for 24 h prior to constructingsamples.1This practice is under the jurisdiction ofASTM Committee D08 on Roofing andWaterproofing and is the direct responsibility of Subcommittee D08.20 on RoofingMembrane Systems.Current edition approved Jan.1,2019.Published January 2019.Originallyapproved in 1966.Last previous edition approved in 2013 as D2523 13.DOI:10.1520/D2523_D2523M-13R19E01.2For 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.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.1 5.2.3 The quantity of material in any layer should be within610%,and the entire sample should be within 65%of thequantities specified.6.Test Specimens6