ASTM_D_4797_-_17.pdf

Designation:D479717Standard Test Methods forGravimetric Analysis of White and Yellow ThermoplasticPavement Marking1This standard is issued under the fixed designation D4797;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 These test methods cover procedures for the gravimetricanalysis of the binder and hydrochloric Acid(HCL)insolubleparticles in white and yellow thermoplastic pavement mark-ings.The HCL insoluble particles can be retroreflective optics,such as glass beads or some other type of retroreflective optic,or non-retroreflective particles such as silica sand,or a com-bination of any two or more of these materials.1.2 This standard does not address the physical separationand the individual quantification of each component when amixture of two or more HCL insoluble materials is present.Rather it requires the user to visually evaluate the HCLinsoluble material(obtained from following this test method)and report the types of materials present.1.3 This standard does not purport to address the titaniumdioxide or lead chromate pigment measurement(after ashing)which is detailed in Test Methods D1394 and D126.1.4 This standard will attempt to address the interference oforganic pigments with the binder results.1.5 The analytical procedures appear in the following order:SectionsPercent Binder10Percent Retroreflective Optics orNon-Retroreflective Particles111.6 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.7 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.1.8 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:2D126 Test Methods for Analysis of Yellow,Orange,andGreen Pigments Containing Lead Chromate and Chro-mium Oxide GreenD1394 Test Methods for Chemical Analysis of White Tita-nium PigmentsD7307 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 MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 ash,nthe inorganic components of thermoplasticpavement marking including the pigment,retroreflectiveoptics,and filler.3.1.2 binder,nthe organic components(resinous compo-nents)of thermoplastic pavement marking that bind thepigments,retroreflective optics,and filler together as a unit.3.1.3 filler,nthe inorganic components of thermoplasticpavement marking not including the pigments,retroreflectiveoptics,or non-retroreflective particles that are consideredfunctional.3.1.4 retroreflective optic,nfunctional particle that reflectsand returns a relatively high proportion of light in a directionclose to the light source.This characteristic is maintained overa wide variation of the angle made by the incident light ray andnormal to the retroreflective surface.This includes a single1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.44 on Traffic Coatings.Current edition approved Dec.1,2017.Published February 2018.Originallyapproved in 1988.Last previous edition approved in 2012 as D4797 12a.DOI:10.1520/D4797-17.2For 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 component structure such as a spherical glass bead or acomposite optic such as a core with a surface covered by smallreflectors or such as a cluster of small reflectors bondedtogether.3.1.5 non-retroreflective p