1、Designation:D708906(Reapproved 2021)Standard Practice forDetermination of the Effectiveness of Anti-Graffiti Coatingfor Use on Concrete,Masonry and Natural Stone Surfacesby Pressure Washing1This standard is issued under the fixed designation D7089;the number immediately following the designation ind
2、icates 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 a basic method for evaluati
3、ng theperformance of anti-graffiti products on mineral building sub-strates by a series of increasingly abrasive cleaning methods.The anti-graffiti materials are applied to a series of concrete,masonry and natural stone specimens for evaluation.Graffitiresistance is based on how a defined set of mar
4、kings areremoved by a designated set of cleaning techniques.1.2 This practice also defines a procedure to evaluate graffitiremoval after re-marking with subsequent re-cleaning.It doesnot address the re-treatment of substrates after a material is nolonger graffiti resistant.1.3 The values stated in S
5、I units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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 env
6、ironmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 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 Stand
7、ards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D3924 Specification for Standard Environment for Condi-tioning and Testing Paint,Varnish,Lacquer,and RelatedMaterialsD6578 Practice for Determina
8、tion of Graffiti Resistance3.Terminology3.1 Definitions:3.1.1 graffti resistant,nthe property of coatings to beresistance to the application of graffiti or exhibit easy removalof graffiti without surface damage,or both.3.1.2 non-sacrificial anti-graffti coatings,nthe propertyof a coating in which th
9、ey remain intact or undamaged after theremoval of graffiti from their surface.3.1.3 sacrificial anti-graffti coatings,nthe property ofcoatings in which they are destroyed or damaged during theremoval of graffiti,therefore requiring subsequent re-application.4.Summary of Practice4.1 Spray paints and
10、markers are applied to a series ofconcrete,masonry and natural stone test panels pre-treatedwith the product(s)to be evaluated.The paint(s)and mark(ers)are removed using a series of commercial building cleaningmethods which begin with the least aggressive method,high-pressure water wash with a comme
11、rcial graffiti cleaner andproceed to increasingly aggressive cleaning methods such ashigh-pressure hot water wash and high-pressure sodium bicar-bonate wash.5.Significance and Use5.1 Graffiti on buildings and structures is a significantproblem in various regions across the country.A variety ofcoatin
12、gs have been developed to be either resistant to theapplication of paints/marker or to aid in their removal.Thisstandard practice describes a procedure for evaluating theeffectiveness of anti-graffiti coatings applied to variousconcrete,masonry and natural stone substrates.It does notaddress graffit
13、i removal on metal or any other non-mineralsubstrate.5.2 This practice only addresses graffiti removal on sub-strates in a laboratory environment,that have not been exposed1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is th
14、e direct responsibility ofSubcommittee D01.47 on Concrete,Stone and Masonry Treatments.Current edition approved Jan.1,2021.Published January 2021.Originallyapproved in 2006.Last previous edition approved in 2014 as D7089 06(2014).DOI:10.1520/D7089-06R21.2For referenced ASTM standards,visit the ASTM
15、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
16、 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.1to either natural or artificial weathering.Specification D6578describes a method for graffiti removal after both natural andartificial weathering.6.Apparatus6.1 Commercial based graffiti re