1、Designation:D1918/D1918M95(Reapproved 2017)Standard 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 las
2、t revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the asbes-tos content of untreated chrysotile asbestos textile materialswhich are
3、 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 textilematerials in which asbestos is the only inorganic fiber pre
4、sent,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 stated in either SI units or inch-pound unitsare to be regarded
5、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 WarningBreathing of asbestos dust is hazardous.Asbestos and asbest
6、os 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 safe use of chrysoltile asbestos,refer to“Safe Useof Chrysotile Asb
7、estos: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 safety and health practices and determine the applica-bility of reg
8、ulatory limitations prior to use.For specific safetyhazard,see 1.5.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mend
9、ations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D123 Terminology Relating to TextilesD1193 Specification for Reagent WaterD2946 Terminology for Asbestos and AsbestosCementProducts3.Terminology3.1 For definitions of othe
10、r 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 serpentine mineral designated as chrysotileand h
11、aving 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 800 to 840C 1470 to1540F for 1 h and the loss
12、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 present they are included in theamount of asbesto
13、s reported.While carbonates are not deter-mined and reported separately,the amount of carbon dioxideincluded in the carbonates is measured and used to determine1This test method is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of Sub
14、committeeC17.03 on Asbestos-Cement Sheet Products and Accessories.Current edition approved June 1,2017.Published July 2017.Originally approvedin 1962.Last previous edition approved in 2009 as D1918/D1918M 95(2009)1.DOI:10.1520/D1918_D1918M-95R17.2Available from The Asbestos Institute,Online,http:/ r
15、eferenced 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 standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Cons
16、hohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 the correct residue from ignition of the asbestos when calcu-lating asbestos in presence of carbonates.4.3 Both of the alternate procedures(4.1 and
