1、Designation:C1119/C1119M90(Reapproved 2015)Standard Test Method forVacuum Drainage of Asbestos-Cement Mixes1This standard is issued under the fixed designation C1119/C1119M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of
2、last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a laboratory procedure forthe evaluation of asbestos fiber by measuring the rate ofdrainage und
3、er suction,of an asbestos-cement mixture.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 from the two syste
4、ms 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-cement products,mi
5、nimize 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 theresponsibility of
6、 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 Note 1 and 1.3for specific hazard warnings.2.Referenced Documents2.1 ASTM Standards:3C150/C150M Specification for Portland CementC430 Test Meth
7、od for Fineness of Hydraulic Cement by the45-m(No.325)SieveC1124/C1124M Test Method for Kerosene Retention ofAsbestosD2590/D2590M Test Method for Sampling Chrysotile As-bestosD2946 Terminology for Asbestos and AsbestosCementProductsD3752 Test Method for Strength Imparted by Asbestos to aCementitious
8、 MatrixD3879 Test Method for Sampling Amphibole Asbestos(Withdrawn 2009)4D3880/D3880M Test Method for Asbestos Strength UnitsE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods2.2 ACS Document:Specifications of the Committee on Analytical Reagents ofthe American Chemical Societ
9、y53.Terminology3.1 For definitions,refer to Terminology D2946.4.Summary of Test Method4.1 The fiber to be evaluated is fiberized to simulate thespecific surface area at which it is used in the industrialprocess,and it is added to the same mix using representativeingredients and process water.If the
10、latter is not available,saturated water may be substituted(see 7.7).The slurry isdewatered on a 177-m No.80 screen cloth(or in accordancewith the Apparatus Section of Test Method D3752)under avacuum of 90 kPa 70 cm Hg.The end point is determined asthe point when air begins to pass through the filter
11、 cake,andthe suction drops abruptly.The time taken to reach the endpoint is recorded and this is a function of the drainage rate ofthe mix.5.Significance and Use5.1 This test method can be used to estimate the speed ofdrainage and the rate of production of products from the fiberevaluated,in industr
12、ial applications.It may be applied to singlegrades of fiber,or to fiber blends,together with the same bindersystem and process water used in the process under evaluation.1This test method is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibil
13、ity of SubcommitteeC17.03 on Asbestos-Cement Sheet Products and Accessories.Current edition approved July 1,2015.Published July 2015.Originally approvedin 1989.Last previous edition approved in 2009 as C1119 90(2009)1.DOI:10.1520/C1119_C1119M-90R15.2Available from The Asbestos Institute,http:/ refer
14、enced 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.4The last approved version of this historical standard is referenced onwww.a
15、stm.org.5Available from American Chemical Society,1155 16th St.NW,Washington,DC 20036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Apparatus6.1 Drainage Apparatus,as described in Fig.1 and Fig.2.The funnel shown in Fig.1 shall be cem
16、ented to the bottom ofPart 3 of Fig.2 to give an air-tight seal.Alternatively,theapparatus described in Test Method C1124/C1124M or in TestMethod D3752,may be used.6.2 Vacuum-Actuated SwitchSet to activate an electrictimer when the pressure is between 50 kPa 40 cm Hg vacuumand 8 kPa 70 cm Hg vacuum.This switch shall be located atthe discharge of the drainage funnel,together with a manom-eter of from 0 to 50 kPa absolute 0 to 76 cm Hg vacuumcapacity,and a water trap with a capacity of 500 cm.6.3