ASTM_D_8161_-_17.pdf

Designation:D816117Standard Test Method forImpact Resistance of Thermoplastic Pavement MarkingMaterials over a Highway Substrate by Means of a StrikerImpacted by a Falling Weight1This standard is issued under the fixed designation D8161;the number immediately following the designation indicates the year oforiginal adoption or,in 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 over aroad-type substrate and test methodology of thermoplasticpavement marking materials similar to the“Gardner Impact”method as listed in Test Method D5420.1.2 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 onlyand 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 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:2D883 Terminology Relating to PlasticsD2794 Test Method for Resistance of Organic Coatings tothe Effects of Rapid Deformation(Impact)D4796 Test Method for Bond Strength of ThermoplasticPavement Marking MaterialsD5420 Test Method for Impact Resistance of Flat,RigidPlastic Specimen by Means of a Striker Impacted by aFalling Weight(Gardner Impact)D5628 Test Method for Impact Resistance of Flat,RigidPlastic Specimens by Means of a Falling Dart(Tup orFalling Mass)D7307 Practice for 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 the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 The terms and definitions in Terminology D883 andE284 apply to this method.3.2 Definitions of Terms Specific to This Standard:3.2.1 failure(of test specimen),nthe presence of any crackor split created by the impact of the falling weight that can beseen by the naked eye under normal laboratory lightingconditions.3.2.2 Falling Weight(Gardner)Impact Tester,nimpacttester designed as described in Test Method D5420.3.2.3 thermoplastic pavement marking,na highly filled100%total solids highway marking system that when heatedto a molten state can be extruded or sprayed onto a road surfaceand when cooled forms a solid durable delineator or marking.4.Summary of Test Method4.1 In this test method,a weight falls through a guide tubeand impacts a striker resting on top of a supported specimen.This test method is similar to Test Methods D5420 and D2794except the impact occurs on thermoplastic pavement markingmaterial applied over a solid road-type substrate with minimaldeformation.4.2 The test result is typically pass/fail,however maximumimpact to cause material failure can be determined as shown bycracking,chipping,delaminating,etc.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 Coatings.Current edition approved Dec.1,2017.Published April 2018.DOI:10.1520/D8161-17.2For 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.Significance and Use5.1 The significance of this test is to determine the thermo-plastic pavement marking materials resistance to impact overa simulated pavement substrate,under laboratory conditions,and is expressed as pass/fail or numerically.The test result canbe used as a quality test or to differentiate marking materials.5.2 Anyone attempting to perform this test should initiallyreview Test Methods D5420 and D2794,specifically theequipment setup.5.3 Sampl