1、Designation:D816020Standard Test Method forUn-notched Cantilever Beam Impact Resistance(IzodImpact)Testing of Thermoplastic Pavement MarkingMaterials1This standard is issued under the fixed designation D8160;the number immediately following the designation indicates the year oforiginal adoption or,i
2、n the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the sample preparation forcantilever beams and test methodology
3、of thermoplastic pave-ment marking materials,similar to the“Izod Impact”methodlisted in Test Method D4812.1.1.1 Some methods call for results in inch pound-force(in.lbf)as opposed to the common foot pound-force/inch(ftlbf/in.)or Joule/meter(J/m)(energy absorbed per unit ofspecimen of similar cross-s
4、ection).This method does notpurport to cover all the issues involved with the pendulumimpact of cantilever beams and suggests that Test MethodD4812 and Test Methods D256 be reviewed before thismethodology is attempted.1.1.2 Thermoplastic pavement marking materials are ahighly filled polymer matrix.D
5、epending on the formula theresulting matrix may be brittle,therefore possibly resulting ininconsistent test results.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyan
6、d are not considered 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
7、 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 Organiza
8、tion TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD883 Terminology Relating to PlasticsD4812 Test Method for Unnotched Cantilever Beam ImpactResistance of PlasticsD7307 Practice for
9、Sampling of Thermoplastic Traffic Mark-ing MaterialsD7308 Practice for Sample Preparation of ThermoplasticPavement Marking MaterialsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE284 Terminology of AppearanceE691 Practice for Conducting an Interlaboratory Study toDetermine
10、 the Precision of a Test Method2.2 ISO Standard:3ISO 180:2019 Plastics Determination of Izod impactstrength3.Terminology3.1 The terms and definitions in Terminology D883 andTerminology E284 apply to this method.3.2 Definitions of Terms Specific to This Standard:3.2.1 impact tester,n“standardized”(se
11、e Test MethodsD256)pendulum-type hammers,mounted in“standardized”machines,in breaking standard specimens with one pendulumswing.3.2.2 thermoplastic pavement marking(materials),nahighly filled 100%total solids pavement marking system thatwhen heated to the manufacturers recommended temperatureunder a
12、gitation can be applied onto a pavement surface andwhen cooled forms a solid durable delineator or marking.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.44 on Traffic Coati
13、ngs.Current edition approved June 1,2020.Published June 2020.DOI:10.1520/D8160-20.2For 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 ont
14、he ASTM website.3Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United Sta
15、tesThis 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 Tra
16、de(TBT)Committee.4.Summary of Test Method4.1 This test method is similar to Test Method D4812,butinstead covers the sample preparation and testing methodologyspecific to the impact testing of the unique material which isthermoplastic pavement marking.Since thermoplastic pave-ment marking materials are not designed to be injectionmolded and need to be poured into molds for testing,samplepreparation is different.Also,since the normally acceptedpendulum impact result notations are not being used in
