1、Designation:D730721Standard Practice forSampling of Thermoplastic Pavement Marking Materials1This standard is issued under the fixed designation D7307;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 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 proper field sampling of ther-moplastic pavement marking materials to ensure test results arerepresentative of the mater
3、ial being tested.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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
4、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 Principl
5、es 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:2D346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD2013 Practice for
6、 Preparing Coal Samples for Analysis3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 thermoplastic pavement marking material,nahighly filled 100%total solids highway marking material thatwhen heated to a molten state can be extruded or sprayed ontoa road surface and when cooled
7、forms a solid,durabledelineator.4.Summary of Practice4.1 A random selection of three bags of thermoplasticpavement marking material is made from a manufactured lot.Using one of the three size reduction methods outlined in thisprocedure a small,representative sample of the manufacturedlot is obtained
8、.This sample may then be used for the testing ofthe chemical and physical properties of the marking material.5.Significance and Use5.1 It is important to obtain a truly representative sample ofthe thermoplastic pavement marking material prior to perform-ing any tests.This can be difficult due to the
9、 wide ranges ofsizes,shapes,and densities of the individual components thatare used in the manufacture of these types of materials.Thesample that is obtained using this guide should be representa-tive of the manufactured lot from which it was obtained andcan be used for the testing of the chemical a
10、nd physicalproperties of the material as required by the governing speci-fication.6.Apparatus(See Note 1)6.1 Quartering Method:6.1.1 1.2 by 1.2 m(4 by 4 ft)Section of Cardboard,SmoothPlywood,or Metal.6.1.2 Metal Scooping Pan.6.1.3 Metal Splitting Device,consisting of four panelsseparated from each o
11、ther at a 90 degree angle and joined at thecenter.6.1.4 Unlined 3.78 L(1 gal)Metal Cans.6.2 Splitter Method:6.2.1 1:1 Splitter Apparatus,with pans with a minimumcapacity of 28.3 L(1 cubic foot).6.2.2 Unlined 3.78 L(1 gal)Metal Cans.6.3 Thieving Method:6.3.1 5 cm(2 in.)ID Metal Pipe,approximately 1 m
12、(3 ft)long.6.3.2 Unlined 3.78 L(1 gal)Metal Cans.NOTE1The quartering procedure for reducing bulk samples,to obtainrepresentative test samples,is described and illustrated in Practice D346.Various types of riffle samplers are illustrated in Practice D2013.7.Hazards7.1 Consult the material safety data
13、 sheet for the materialbeing tested and follow the recommendations for the handling1This 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 approve
14、d Nov.1,2021.Published November 2021.Originallyapproved in 2006.Last previous edition approved in 2016 as D7307 06(2016).DOI:10.1520/D7307-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume
15、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 standardizatio
16、n 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?of the material.Minimum safety equipment should be safetyglasses,dust mask for nuisance dust,and gloves.7.2 Use proper lifting techniques when handling the con-tainers of thermoplastic pavement marking materials.8.Procedure8.1 Quartering Method:8.1.1 Randomly select three bags of thermoplastic pave-
