1、Designation:D730706(Reapproved 2011)Standard Practice forSampling of Thermoplastic Traffic 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 r
2、evision.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 proper field sampling of ther-moplastic traffic marking materials to ensure test results arerepresentati
3、ve of the material 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 th
4、is 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:2D346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD2013 Practice for Preparing Coal Sam
5、ples for Analysis3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 thermoplastic traffc marking material,na highlyfilled 100%total solids highway marking material that whenheated to a molten state can be extruded or sprayed onto a roadsurface and when cooled forms a solid,durable
6、 delineator.4.Summary of Practice4.1 Arandom selection of three bags of thermoplastic trafficmarking material is made from a manufactured lot.Using oneof the three size reduction methods outlined in this procedurea small,representative sample of the manufactured lot isobtained.This sample may then b
7、e used for the testing of thechemical and physical properties of the marking material.5.Significance and Use5.1 It is important to obtain a truly representative sample ofthe thermoplastic traffic marking material prior to performingany tests.This can be difficult due to the wide ranges of sizes,shap
8、es,and densities of the individual components that areused in the manufacture of these types of materials.The samplethat is obtained using this guide should be representative of themanufactured lot from which it was obtained and can be usedfor the testing of the chemical and physical properties of t
9、hematerial as required by the governing specification.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 other at a 90 degree angle a
10、nd 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(3 ft.)long.6.3.2 Unlined 3
11、.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 sheet for the materialbei
12、ng tested and follow the recommendations for the handlingof 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 traffic marking materials.8.Procedure8.1 Quartering Method
13、:1This 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 Nov.1,2011.Published November 2011.Originallyapproved in 2006.Last previous edit
14、ion approved in 2006 as D7307 06.DOI:10.1520/D7307-06R11.2For 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
15、 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.1.1 Randomly select three bags of thermoplastic trafficmarking material from the lot that is to be sampled.The lot sizeshould not exceed 18 662 kg(50 000 lb).8.1.2 Place the section of cardboard,pl
16、ywood,or metal ona level floor surface.8.1.3 Empty the contents of one of the bags onto thesampling area.Using the metal scoop mix the material,breaking up any large lumps.Shape the pile of material into ashigh of pile as possible forming a symmetrical inverted cone.8.1.4 Take the metal splitting device and center it over theapex of the inverted cone of thermoplastic material.Lower thedevice into the material,thus splitting the sample into fourequal quarter sections.8.1.5 Take the material from
