ASTM_D_913_-_20.pdf

Designation:D91320Standard Practice forEvaluating Degree of Pavement Marking Line Wear1This standard is issued under the fixed designation D913;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 practice covers the evaluation of degree of resis-tance to wear that may occur with pavement markings in roadtests(see Practice D713)or in actual service,using photo-graphic standards for comparative evaluation.1.2 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.1.3 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:2D713 Practice for Conducting Road Service Tests on FluidTraffic Marking Materials3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 failure,described by these photographic references,nthat condition manifested in pavement markings by actualdetachment of sections of the film from its substrate or erosionof sections of the marking down to the substrate.3.1.1.1 DiscussionThe degree of resistance to failure isjudged by the area of substrate that is covered by the pavementmarking.3.1.2 substrate,nthe roadway surface or previously ap-plied traffic marking over which the pavement marking beingtested was applied.4.Significance and Use4.1 This practice is designed to evaluate the resistance towear of a pavement marking.It should be noted that a highdegree of wear resistance of pavement marking applied to abare pavement surface may not guarantee similar results whenthe same pavement marking is applied over old markings.5.Type of Failure5.1 The failure as described in Section 3 does not presumeany specific mechanism,and all areas where the substrate isvisible shall be considered a failure.6.Use of Photographic References6.1 The photographic references that are part of this practiceare representative of pavement markings showing the degreesof resistance to wear.The percentage of the pavement surfacecovered by the marking is shown on each reference(Fig.1).6.1.1 The degree of resistance to wear is likely to vary overany given area.For example;for transverse markings it islikely that you will see more wear of the pavement markingwithin the wheel paths compared to the areas of the pavementmarking that fall outside or between the wheel paths,it istherefore preferable to use one of the following gradingmethods:6.1.1.1 Select an area as representative and base the relativeperformance of the pavement marking on this area or6.1.1.2 Grade segments of the pavement marking and aver-age these gradings.7.Procedure7.1 Compare the representative areas of the pavement mark-ing with the photographic references and estimate the percentof intact film based on the photographic standards that mostclosely represent the area of the pavement marking beingevaluated.8.Report8.1 Report the mean and range of the substrate coverageestimations,if appropriate.9.Keywords9.1 durability;pavement markings;resistance to wear;traf-fic markings;traffic paint1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.44 on Traffic Coatings.Current edition approved June 1,2020.Published July 2020.Originally approvedin 1947.Last previous edition approved in 2015 as D913 15.DOI:10.1520/D0913-20.2For 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 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.ASTM 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 validity of any such patent rights,and the riskof infringement of such rights,are entirel