ASTM_D_7942_-_15.pdf

Designation:D794215Standard Specification forThermoplastic Pavement Markings in Non Snow PlowAreas1This standard is issued under the fixed designation D7942;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 specification covers a reflectorized thermoplasticbased pavement striping material of the class that is applied tothe road surface in a molten state by screed/extrusion or ribbonextrusion means.Retroreflectivity of the pavement markingcompound is achieved initially by surface application ofretroreflective optics at the time of pavement marking appli-cation.Upon cooling to normal pavement temperature,thepavement marking material produces an adherent reflectorizedstripe of specified thickness and width capable of resistingdeformation by traffic.The pavement marking compoundincludes retroreflective optics(glass beads or composite optics,or both)that are incorporated into the material at the time ofmanufacture that provide retroreflective properties during theservice life of the material.1.1.1 This specification is limited to:1.1.1.1 Longitudinal applications in non snow plow areas,1.1.1.2 Standard(non-profile)pavementmarkingapplications,and1.1.1.3 Applications on smooth asphalt or concrete surfaces.Asphalt seal coat applications,which use large aggregateresulting in a very rough,open grade finish,are excluded fromthis specification.1.1.2 This specification includes:1.1.2.1 Compositional and physical property requirementsof the thermoplastic pavement marking material,1.1.2.2 Requirements for the optics that are used to reflec-torize the thermoplastic pavement marking material afterapplication,1.1.2.3 Field performance requirements for the installedthermoplastic pavement markings,and1.1.2.4 Material application requirements.1.2 The values stated in inch-pounds units are to be re-garded as the standard except where noted in the document.The values given in parentheses are mathematical conversionsto SI units that are provided for information only and are notconsidered 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D36 Test Method for Softening Point of Bitumen(Ring-and-Ball Apparatus)D92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD4960 Test Method for Evaluation of Color for Thermoplas-tic Traffic Marking MaterialsD6628 Specification for Color of Pavement Marking Mate-rialsD7307 Practice for Sampling of Thermoplastic Traffic Mark-ing MaterialsD7308 Practice for Sample Preparation of ThermoplasticTraffic Marking MaterialsD7585 Practice for Evaluating Retroreflective PavementMarkings Using Portable Hand-Operated InstrumentsD7735 Test Method for Type A Durometer Hardness Testingof Road Marking Thermoplastic at Elevated TemperaturesE313 Practice for Calculating Yellowness and WhitenessIndices from Instrumentally Measured Color CoordinatesE1710 Test Method for Measurement of RetroreflectivePavement Marking Materials with CEN-Prescribed Ge-ometry Using a Portable RetroreflectometerG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 AASHTO Standards:3AASHTO M247 Standard Specification for Glass BeadsUsed in Traffic PaintsAASHTO T250 Standard Method of Test for Thermoplastic1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.38 onHighway Traffic Control Materials.Current edition approved Jan.1,2015.Published January 2015.DOI:10.1520/D7942-15.2For 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.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Traffic Line Material3.Terminology3.1 Definitions:3.1.1 bindermixture of rosins,synthetic resins,waxes,polymers,and plasticizers that form the continuous phase inthe Pavement Marking Compound.3.1.2 pavement marking compounda homogeneous mix-ture of binder,fillers,extenders,pigments and intermixedretroreflective optics.3.1.3 retroreflective optics:3.1.3.1 glass beadsspherical glass manufactured for usewith pavement marking materials to provide retroreflectiveproperties to the marking,a