1、Designation: D7307 06 (Reapproved 2016)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
2、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 the proper field sampling of ther-moplastic traffic marking materials to ensure test results arer
3、epresentative 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
4、 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:2D346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD2013 Practice for Pr
5、eparing Coal Samples 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 f
6、orms a solid, durable delineator.4. Summary of Practice4.1 A random 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 isobtain
7、ed. This sample may then be 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 t
8、he wide ranges of sizes,shapes, 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 chemica
9、l and physical properties of thematerial 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 fr
10、om each other 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,
11、 approximately1m(3ft)long.6.3.2 Unlined 3.78 L (1 gal) Metal Cans.NOTE 1The 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
12、 material safety data sheet for the materialbeing 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
13、marking materials.8. Procedure8.1 Quartering Method: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 April 1, 2016. Published Ap
14、ril 2016. Originallyapproved in 2006. Last previous edition approved in 2011 as D7307 06 (2011).DOI: 10.1520/D7307-06R16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refe
15、r 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 States18.1.1 Randomly select three bags of thermoplastic trafficmarking material from the lot that is to be sampled. The lot sizeshou
16、ld not exceed 18 662 kg (50 000 lb).8.1.2 Place the section of cardboard, plywood, 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
17、 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 any two opposing qu
18、arters andreturn it to the empty bag. The two remaining quarters are to bemixed, the inverted cone reformed, and split in the samemanner as explained in 8.1.4, rotating between the two quartersthat are retained at the end of each step. Repeat the process fora total of four times. Retain the final tw
19、o opposing quarters asa part of the composite sample and place in the unlined 3.78 L(1 gal) can.8.1.6 Perform the same procedure as outlined in 8.1.3 8.1.5 for the two remaining bags of material. When the finalquarters are taken from these two containers the sum of thethree should fill the 3.78 L (1
20、 gal) container (or 4.08 to 4.54 kg(9 to 10 lb).8.1.7 Label the outside of the one-gallon sample can withadequate identification markings including: manufacturer,product number, batch number, date of manufacture, color, andspecification.8.1.8 The entire composite sample should be melted down.8.2 Spl
21、itter Method:8.2.1 Randomly select 3 bags of thermoplastic traffic mark-ing material from the lot that is to be tested. The lot size shouldnot exceed 18 662 kg (50 000 lb).8.2.2 Empty the contents of one of the bags into one of thepans and place on top of the 1:1 splitter.8.2.3 Place a pan underneat
22、h each of the two dischargesections of the splitter.8.2.4 Empty the contents in the top pan such that thematerial passes through the splitter.8.2.5 Take each half and split individually to form quarters.Return the two opposing pans, or quarter, to the emptycontainer. Split the two remaining pans ind
23、ividually to formquarters. Repeat the above step by splitting the two opposingpans while returning the others to the material container. Thissplitting procedure is performed four times.8.2.6 After the final split place the two opposing quartersinto the 3.78 L (1 gal) container.8.2.7 Repeat steps 8.2
24、.2 8.2.6 for the two remaining bagsof thermoplastic that were selected for testing. When the finalquarters are taken from the two containers, the sum of the threecontainers should fill the 3.78 L (1 gal) sample container (4.08to 4.54 kg (9 to 10 lb).8.2.8 Label the outside of the 3.78 L (1 gal) samp
25、le can withadequate identification markings including: manufacturer,product number, batch number, and date of manufacture, color,and specification.8.2.9 The entire composite sample should be melted down.8.3 Thieving Method:8.3.1 Randomly select three bags of thermoplastic pave-ment marking material
26、from the lot that is to be tested. The lotsize should not exceed 18 662 kg (50 000 lb).8.3.2 Place a bag on a flat surface.8.3.3 Carefully cut the bag at the top or bottom to allow thepipe to be inserted in the bag.8.3.4 Insert the sampling pipe into the bag and push throughthe thermoplastic materia
27、l across the entire length of the bag.8.3.5 Carefully remove the pipe and empty the thermoplas-tic material that is retained inside the pipe into the 3.78 L(1 gal) sample container.8.3.6 Repeat the process, pushing the pipe through a differ-ent area of the container. Continue the process until anapp
28、roximate 1.4 kg (3 lb) sample has been obtained from thecontainer.8.3.7 Repeat steps 8.3.2 8.3.6 for the other two remainingbags of thermoplastic that were selected for testing. The sum ofthe samples taken from the three containers should fill the3.78 L (1 gal) or 4.08 to 4.54 kg (9 to 10 lb) contai
29、ner.8.3.8 Label the outside of the 3.78 L (1 gal) sample withadequate identification markings including: manufacturer,product number, batch number, and date of manufacture, color,and specification.8.3.9 The entire composite sample should be melted down.9. Keywords9.1 sampling; thermoplastic traffic
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