1、Designation:D1918/D1918M95(Reapproved 2009)1Standard Test Method forAsbestos Content of Asbestos Textiles1This standard is issued under the fixed designation D1918/D1918M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of la
2、st 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 corrected editorially in March 2010.1.Scope1.1 This test method covers the determination of the asbes-tos con
3、tent of untreated chrysotile asbestos textile materialswhich are usually blends of asbestos and organic fibers.Thistest method is also applicable to treated asbestos textilematerials provided the treatment can be completely removedprior to testing.1.2 This test method is limited to those asbestos te
4、xtilematerials in which asbestos is the only inorganic fiber present,or in which any other inorganic fiber or wire used as reinforce-ment can be removed prior to testing.1.3 If carbonates are present,a correction is made for theloss on ignition in the calculation for asbestos content.1.4 The values
5、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 from the two systems may result in non-conformancewith the standard.1.5 Wa
6、rningBreathing 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-cement products,minimize the dust that results.For informa-tion on the saf
7、e use of chrysoltile asbestos,refer to“Safe Useof Chrysotile Asbestos:A Manual on Preventive and ControlMeasures.”21.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate saf
8、ety and health practices and determine the applica-bility of regulatory limitations prior to use.For specific safetyhazard,see 1.5.2.Referenced Documents2.1 ASTM Standards:3D123 Terminology Relating to TextilesD1193 Specification for Reagent WaterD2946 Terminology for Asbestos and AsbestosCementProd
9、ucts3.Terminology3.1 For definitions of other textile terms used in this testmethod,refer to Terminology D123.For asbestos terms,referto Terminology D2946.3.2 Definitions:3.2.1 asbestos,n1.generala group of impure silicateminerals occurring in fibrous form.2.textilethe hydrousmagnesium silicate serp
10、entine mineral designated as chrysotileand having the general empirical formula Mg3Si2O5(OH)4.3.2.2 Small amounts of carbonates,which may be present,are calculated as asbestos.4.Summary of Test Method4.1 When carbonates are not present in the fibers,a speci-men is dried to constant mass,heated to 80
11、0 to 840C 1470 to1540F for 1 h and the loss in mass determined.The mass ofthe ignited specimen divided by 0.86(see 5.2)is assumed toequal the mass of asbestos fiber originally present.Thiscorrected mass is calculated as a percentage of the weight ofthe original specimen.4.2 When carbonates are prese
12、nt they are included in theamount of asbestos reported.While carbonates are not deter-mined and reported separately,the amount of carbon dioxideincluded in the carbonates is measured and used to determinethe correct residue from ignition of the asbestos when calcu-lating asbestos in presence of carb
13、onates.4.3 Both of the alternate procedures(4.1 and 4.2)areapplicable in the presence of organic fiberous material.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 Produ
14、cts and Accessories.Current edition approved Nov.1,2009.Published March 2010.Originallyapproved in 1962.Last previous edition approved in 2004 as D1918 95(2004)1.DOI:10.1520/D1918_D1918M-95R09E01.2Available from The Asbestos Institute,Online,http:/ referenced ASTM standards,visit the ASTM website,ww
15、w.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer 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 States1 5.Significan
16、ce and Use5.1 The asbestos content of asbestos textile materials is ofmajor significance,since the percentage of asbestos presentdefines the grade of the textile and the approximate service-ability temperature for such materials.5.2 This test method is considered satisfactory for accep-tance testing of commercial shipments because:(1)currentestimates of between-laboratory reproducibility are acceptable,(2)the test method has been used extensively in the trade foracceptance testing.In cases of di
