1、Designation:C1120/C1120M98(Reapproved 2011)1Standard Test Method forWash Test of Asbestos1This standard is issued under the fixed designation C1120/C1120M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUnits information was editorially corrected in January 2012.1.Scope1.1 This test method covers the procedure for determiningthe fines content of a
3、sbestos fibers by washing with water on aspecified sieve.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 other.Combiningvalues fr
4、om 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 working with asbestos-ce
5、ment 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,associated with its use.It is ther
6、esponsibility 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.For a specifichazards warning,see 1.3.2.Referenced Documents2.1 ASTM Standards:3C430 Test Method for Fineness of Hydraulic Cement b
7、y the45-m(No.325)SieveC1121 Test Method for Turner and Newall(T and N)Wet-Length Classification of AsbestosD2589 Test Method for McNett Wet Classification of DualAsbestos FiberD2590 Test Method for Sampling Chrysotile AsbestosD2946 Terminology for Asbestos and AsbestosCementProductsD3639 Test Method
8、 for Classification of Asbestos by Que-bec Standard TestD3879 Test Method for Sampling Amphibole Asbestos(Withdrawn 2009)4E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods2.2 QAMA Document:C-5 Method for T&N Wet
9、Classification of Asbestos53.Terminology3.1 For terminology,refer to Terminology D2946.4.Summary of Test Method4.1 Specimens are washed on a sieve by means of a standardwater nozzle.4.2 The material retained on the screen is dried andweighed,and the percent loss in weight is calculated andreported.5
10、.Significance and Use5.1 The wash test gives a rapid and simple evaluation of thefines content.5.2 The equipment required and the technique followed areboth simple and undemanding.5.3 The fines content obtained by this test method approxi-mates the equivalent screen classification obtained by TestMe
11、thods C1121 and D2589.1This test method is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Productsand is the direct responsibility of SubcommitteeC17.03 on Asbestos-Cement Sheet Products and Accessories.Current edition approved Nov.1,2011.Published January 2012.Originallyappr
12、oved in 1991.Last-previous edition approved in 2006 as C112098(2006).DOI:10.1520/C1120_C1120M-98R11E01.2Available 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 volum
13、e information,refer to the standards Document Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.org.5Published in Chrysotile Asbestos Test Manual,3rd edition,available fromAsbestos Institute,1002 Sherbrooke St.W,Suite 1750,Montral,QC,Cana
14、daH3A 3L6.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Apparatus6.1 Standard 74-m(No.200)full height 20-cm 8-in.diameter testing sieve with a standard 1.68-mm(No.12)backing wire cloth,6as described in Specification E11.6.2 For testin
15、g floats only,a standard 44-m(No.325)fullheight 20-cm 8-in.diameter testing sieve with a 1.68-mm(No.12)backing wire cloth,6as described in Specification E11,is required.NOTE1In order to prevent the accumulation of water underneath thesieves while washing,several drainage notches may be cut in the si
16、eveframe below the screen cloth,as shown in Fig.1.6.3 Standard 20-cm 8-in.diameter full height sieve frameonly for use as a splash guard,as shown in Fig.1.6.4 Spray Nozzle,as described in Test Method C430 andshown in Fig.2.6.5 Water Supply System,consisting of the followingelements,connected in series(refer to Note 2):6.5.1 Supply of Clean Water,at constant pressure.A waterpressure regulator may be required at some locations.6.5.2 Needle Valve,for regulating the water flow rate.6.5.3 Pressure Ga
