1、Designation: D 3639 92 (Reapproved 2006)Standard Test Method forClassification of Asbestos by Quebec Standard Test1This standard is issued under the fixed designation D 3639; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a procedure for dry classifica-tion of chrysotile asbestos fiber by length distribution.1
3、.2 The values stated in inch-pound units are to be regardedas the standard. The equivalent SI units may be approximate.1.3 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthrisks for users and for those with whom they come into contact.In additi
4、on to other precautions, when working with asbestos-cement products, minimize the dust that results. For informa-tion on the safe use of chrysoltile asbestos, refer to “Safe Useof Chrysotile Asbestos: A Manual on Preventive and ControlMeasures.”21.4 This standard does not purport to address all of t
5、hesafety 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. See 1.3 for aspecific hazard warning.2. Referenced Documents2.1 ASTM
6、 Standards:3D 2590 Test Method for Sampling Chrysotile AsbestosD 2946 Terminology for Asbestos and AsbestosCementProductsD 2987 Test Method for Moisture Content of AsbestosFiberD 3879 Test Method for Sampling Amphibole AsbestosE11 Specification for Wire Cloth and Sieves for TestingPurposesE 177 Prac
7、tice for Use of the Terms Precision and Bias inASTM Test Methods2.2 Quebec Asbestos Mining Association Documents:Quebec Standard Classification of Chrysotile AsbestosGrades4Specifications and Drawings for Quebec StandardAsbestosTesting Machine Model No. 243. Terminology3.1 Definitions:3.1.1 Refer to
8、 Terminology D 2946 and the TerminologySection of Test Method D 2590.4. Summary of Test Method4.1 A 454-g (16-oz) sample is sifted through three progres-sively finer screens, and the mass fraction retained by each isdetermined, and reported in ounces (1 oz = 28.35 g).5. Significance and Use5.1 The Q
9、uebec Standard Testing Machine classifies milledchrysotile asbestos grades according to the mass fractionsretained on each screen. Specimens that are not properlyconditioned prior to testing or that have excessive moisturecontent (above 3 % in accordance with Method D 2987), orboth, may give erratic
10、 and false results.5.2 Some amphibole asbestos fibers may be classified bythis test method but a standard classification for these has notbeen established.6. Apparatus6.1 Quebec Standard Testing Machine, Model No. 2, con-forming to, and operated in accordance with, the specifica-tions5(Fig. 1).NOTE
11、1At some locations the Model 3 is in use, directly driven byV-belts (without the use of a countershaft), and fitted with a solenoid-activated pony brake.NOTE 2Stainless steel screen cloth may be substituted for the requiredbronze provided it meets the same tolerances.46.2 Scoop Balance, 500-g or 16-
12、oz capacity, with gradua-tions of5gor0.2ozandasensitivity of 3 g (0.1 oz).1This test method is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of SubcommitteeC17.03 on AsbestosCement Sheet Products and Accessories.Current edition appro
13、ved June 1, 2006. Published June 2006. Originallyapproved in 1977. Last previous edition approved in 2002 as D 3639 92 (2002)e1.2Available from The Asbestos Institute, http:/ referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annu
14、al Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from the Quebec Asbestos Mining Association, 1130 Sherbrooke St.West, Montreal, QC Canada H3A 2M8.5An abstract of construction and operating specifications is available fromASTM He
15、adquarters, 100 Barr Harbor Drive, W. Conshohocken, PA 19428, at anominal price. RequestAdjunctADJD3639. Specifications for the Model 2 tester, aswell as the name and address of the current authorized suppliers, are available.4Model 2 is illustrated in Fig. 1.1Copyright ASTM International, 100 Barr
16、Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.3 Mixing Table, smooth-surfaced, with a surface area ofapproximately 1 m2(1 yd2).7. Sampling7.1 The sampling procedure shall be in accordance withTestMethod D 2590 for chrysotile and Test Method D 3879 foramphiboles.7.2 War
17、ningsee 1.3.8. Test Specimen8.1 Mix thoroughly, and weigh accurately into the scoop ofthe balance, a 454 6 3-g (16 6 0.1-oz) representative portionof fiber free from lumps.9. Calibration and Standardization9.1 Calibrate the Quebec Standard Testing Machine at leastonce per month, prior to use.9.2 Use
18、 standard samples of known test, with fiber lengthcomparable to that of the specimens under analysis.10. Conditioning10.1 Condition the test specimens in accordance with TestMethod D 2590 or D 3879.11. Procedure11.1 Place the screen boxes and the pan on the machine,ensuring that they are lined up tr
19、ue to the platform and that theends of the boxes face the same way each time they are used.11.2 Spread the specimen in Box No. 1 of the testingmachine along its longest axis, by letting it fall loosely fromthe scoop. Hold the scoop 150 to 250 mm (6 to 10 in.) abovethe screen cloth. Take care that wh
20、en the cover of the testingmachine is closed, the fiber shall not be compressed.11.3 Start the machine and allow it to run until it stopsautomatically. Remove each box and deposit the fiber retainedin each box onto the table, in individual piles, picking up andadding the loose fiber adhering to the
21、screen cloth to thecorresponding fraction.11.4 Weigh and record separately, in ounces, the fiberrecovered from each box.12. Report12.1 Report to the nearest 3 g (0.1 oz), the fiber retained ineach box as the Quebec Standard Test of the fiber sample. Anexample of the test results on a long fiber and
22、on a short fibercould be:Box 11/2in.Box 24 MeshBox 310 MeshBox 4PanTotalLong fiber 3.2 9.4 2.8 0.6 16.0 ozShort fiber 0 0 6.2 9.8 16.0 ozNOTE 3Results must be reported in U.S. customary units to complywith the Quebec Standad Classification of Chrysotile Asbestos Grades.513. Precision and Bias13.1 Pr
23、ecision:13.1.1 The single-operator-machine reproducibility is 6 7g(6 0.25 oz) (2S) obtained on any fraction, with long fibers, asdefined in Practice E 177.FIG. 1 Quebec Standard Asbestos Testing Machine, Model 2.D 3639 92 (2006)213.1.2 The equivalent precision on shorter fibers is 6 3g(60.1 oz).13.2
24、 BiasBias for asbestos fibers cannot be estimated forlack of a referee method.13.2.1 Bias associated with each of the sieves used may bedetermined as described in the appendixes to SpecificationE11.13.2.2 It has been observed that the retention of fibers oneach sieve may be a function of the degree
25、to which the screencloth is worn.14. Keywords14.1 amphibole; asbestos; Canadian; chrysotile; classifica-tion; dry test; evaluation; fiber; Q.S.; Quebec standard screen-ing testASTM International takes no position respecting the validity of any patent rights asserted in connection with any item menti
26、onedin this standard. Users of this standard are expressly advised that determination of the validity 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 a
27、nd must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments 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
28、of theresponsible technical committee, which you may attend. If you feel that your comments have not received 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 Bo
29、x 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).D 3639 92 (2006)3
