1、Designation: D3639/D3639M 92 (Reapproved 2011)1Standard Test Method forClassification of Asbestos by Quebec Standard Test1This standard is issued under the fixed designation D3639/D3639M; the number immediately following the designation indicates theyear of original adoption or, in the case of revis
2、ion, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEUnits information was editorially corrected in February 2012.1. Scope1.1 This test method covers a procedure
3、 for dry classifica-tion of chrysotile asbestos fiber by length distribution.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the o
4、ther. Combiningvalues from the two systems may result in non-conformancewith the standard.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 addition to other precautions, when
5、 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 thesafety concerns, if any, as
6、sociated 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 Standards:3D2590 Test Method
7、 for Sampling Chrysotile AsbestosD2946 Terminology for Asbestos and AsbestosCementProductsD2987 Test Method for Moisture Content ofAsbestos FiberD3879 Test Method for Sampling Amphibole Asbestos4E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE177 Practice for Use of the Terms Precis
8、ion and Bias inASTM Test Methods2.2 ASTM Adjunct:Quebec Asbestos Testing Machine Construction and Op-eration Instructions52.3 Quebec Asbestos Mining Association Documents:Quebec Standard Classification of Chrysotile AsbestosGrades6Specifications and Drawings for Quebec StandardAsbestosTesting Machin
9、e Model No. 263. Terminology3.1 Definitions:3.1.1 Refer to Terminology D2946 and the TerminologySection of Test Method D2590.4. 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 ou
10、nces (1 oz = 28.35 g).5. Significance and Use5.1 The Quebec 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 moisture1This test method is und
11、er the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of SubcommitteeC17.03 on Asbestos - Cement Sheet Products and Accessories.Current edition approved Nov. 1, 2011. Published February 2012. Originallyapproved in 1977. Last previous edition ap
12、proved in 2006 as D3639 92 (2006)1. DOI: 10.1520/D3639_D3639M-92R11E01.2Available from The Asbestos Institute, http:/ 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
13、 standards Document Summary page onthe ASTM website.4Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.5Available from ASTM International Headquarters. Order Adjunct No.ADJD3639. Original adjunct produced in 1977.6Available from the Quebec Asbestos Mining
14、Association, 1130 Sherbrooke St.West, Montreal, QC Canada H3A 2M8.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.content (above 3 % in accordance with Method D2987), orboth, may give erratic and false results.5.2 Some amphibole asbe
15、stos 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-tions7(Fig. 1).NOTE 1At some locations the Model 3 is in use,
16、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.66.2 Scoop Balance, 500-g or 16-oz capacity, with gradua-tions of5gor0.2oz
17、andasensitivity of 3 g 0.1 oz.6.3 Mixing Table, smooth-surfaced, with a surface area ofapproximately 1 m21 yd2.7. Sampling7.1 The sampling procedure shall be in accordance withTestMethod D2590 for chrysotile and Test Method D3879 foramphiboles.7.2 Warningsee 1.3.8. Test Specimen8.1 Mix thoroughly, a
18、nd 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 standard samples of known test, with fiber lengthc
19、omparable to that of the specimens under analysis.10. Conditioning10.1 Condition the test specimens in accordance with TestMethod D2590 or D3879.11. Procedure11.1 Place the screen boxes and the pan on the machine,ensuring that they are lined up true to the platform and that theends of the boxes face
20、 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 when the cover of the testingmachine is closed, the fiber
21、 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 and7An abstract of construction and operating specifications is available fromASTM Headquarters,
22、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.Model 2 is illustrated in Fig. 1.FIG. 1 Quebec Standard Asbestos Testing Machine, Mode
23、l 2.D3639/D3639M 92 (2011)12adding the loose fiber adhering to the 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
24、 fiber sample. Anexample of the test results on a long fiber and 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 Classifica
25、tion of Chrysotile Asbestos Grades.713. Precision and Bias13.1 Precision:13.1.1 The single-operator-machine reproducibility is 6 7g6 0.25 oz (2S) obtained on any fraction, with long fibers, asdefined in Practice E177.13.1.2 The equivalent precision on shorter fibers is 6 3g60.1 oz.13.2 BiasBias for
26、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 to which the s
27、creencloth 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 mentionedin this st
28、andard. 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 and must be rev
29、iewed 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 of theresponsi
30、ble 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 Box C700, West C
31、onshohocken, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D3639/D3639M 92 (2011)13
