1、Designation: D 1214 04Standard Test Method forSieve Analysis of Glass Spheres1This standard is issued under the fixed designation D 1214; 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 parent
2、heses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method covers the sieve analysis of glassspheres used for r
3、etroreflective pavements markings and indus-trial uses.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 therespo
4、nsibility 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:2D 346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD 2013 P
5、ractice for Preparing Coal Samples for AnalysisE11 Specification for Wire Cloth and Sieves for TestingPurposes3. Summary of Test Method3.1 The spheres are hand-sieved through standard sieves,starting with the sieve with the largest opening specified andprogressing successively through the specified
6、sieves in theorder of decreasing size of opening, and computing the weightof glass spheres and the percent passing each of the sieves.4. Significance and Use4.1 The size or gradation of glass spheres is one measurableaspect of performance as a retroreflective media. The functionof this test is to me
7、asure the size of glass spheres and todetermine compliance with applicable specifications.NOTE 1This method has been used in other industrial areas outsidethe intended scope of this test method.5. Apparatus5.1 Balance, sensitive to 50 mg.5.2 Sieves, 200 mm (8 in.) in diameter, conforming toSpecifica
8、tion E11, and including such sieves as may berequired by the specifications for the glass spheres.5.3 Oven.6. Samples6.1 By quartering or riffle sampling (Note 2), select arepresentative sample from the material to be tested. Take atleast two representative samples of approximately 500 g eachfrom se
9、parate packages from each shipment in the ratio of twosamples for each 5000 kg (10 000 lb) or fraction thereof.Approximately 50 g (0.02 oz) of dry glass spheres are requiredfor each test. This specimen is also selected by quartering orriffling.NOTE 2The quartering procedure for reducing bulk samples
10、, to obtainrepresentative test samples of suitable size, is described and illustrated inPractice D 346. Various types of riffle samplers are illustrated in PracticeD 2013.7. Procedure7.1 Hand Sieving:7.1.1 Dry the specimen to substantially constant weight at atemperature of 105 to 110 C.7.1.2 Weigh
11、50 g of the dried glass spheres to the nearest 0.1g and place on the sieve with the largest opening in the seriesspecified for the test, which shall be thoroughly dry. Hold thesieve, with pan and cover attached, in one hand in a slightlyinclined position so that the specimen will be well distributed
12、over the sieve, at the same time gently striking the side about150 times per minute against the palm of the other hand on theupstroke. Turn the sieve every 25 strokes about one sixth of arevolution in the same direction. Continue the operation untilnot more than 0.05 g passes through the sieve in 1
13、min ofcontinuous sieving. Each time, before weighing the material1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.44 on Traffic Coatings.Current edition approved Aug. 1, 200
14、4. Published September 2004. Originallyapproved in 1952. Discontinued December 2002 and reinstated in 2004 asD 1214 04.2For 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
15、to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.passing through the sieve, tap the side of the sieve with thebrush handle in order to remove any material adhering to thewire c
16、loth.7.1.3 When the sieving has been finished, remove the coverof the sieve and carefully remove the residue remaining on thesieve to a tared container. Invert the sieve over a piece ofglazed white paper and clean the wire cloth by brushing theunderside. Add the material thus removed from the wire c
17、lothto the residue removed from the sieve.7.1.4 Weigh the portion of the specimen retained on thesieve to the nearest 0.1 g. Place the material passing throughthe largest sieve on the sieve with the next smaller opening forthe series selected for the sieve analysis. Continue sieving in asimilar mann
18、er, using successively each of the selected seriesof sieves in the order of decreasing size of opening, andrecording the weight of that portion of the specimen retainedon each sieve.7.1.5 Washers, slugs, or shot shall not be used on the sieves.7.2 Machine Sieving:7.2.1 Mechanical sieving devices may
19、 be used but the glassspheres shall not be rejected if they meet the specificationrequirements when tested by the hand-sieving method de-scribed in 7.1. When mechanical sieving devices are used, theirthoroughness of sieving shall be tested by using the handmethod for comparison.8. Calculation8.1 Cal
20、culate the weight of material and the percent of thespecimen passing each of the sieves.9. Report9.1 Report the following information:9.1.1 Results of the sieve analysis reported as the total per-cent passing each sieve, expressed to the nearest 0.5 %, and9.1.2 The method of sieving used.10. Precisi
21、on and Bias10.1 PrecisionThe repeatability standard deviation hasbeen determined to be 0.11 with values that ranged from 0.00to 0.24. The reproducibility of this test method is beingdetermined and will be available on or before December 31,2005.10.2 BiasBias cannot be determined because there is nos
22、tandard reference material available.11. Keywords11.1 glass spheres; sieveASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity
23、of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments
24、are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not r
25、eceived a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D1214042
