ASTM C1119 C1119M-1990(2009)e1 Standard Test Method for Vacuum Drainage of Asbestos-Cement Mixes《石棉水泥混合料真空排放的标准试验方法》.pdf
《ASTM C1119 C1119M-1990(2009)e1 Standard Test Method for Vacuum Drainage of Asbestos-Cement Mixes《石棉水泥混合料真空排放的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1119 C1119M-1990(2009)e1 Standard Test Method for Vacuum Drainage of Asbestos-Cement Mixes《石棉水泥混合料真空排放的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C1119/C1119M 90 (Reapproved 2009)1Standard 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 y
2、ear of 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.1NOTEUnits information was corrected and a warning note in 7.4.1 was moved into the standard text editoriallyin March 2010.
3、1. Scope1.1 This test method describes a laboratory procedure forthe evaluation of asbestos fiber by measuring the rate ofdrainage under 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 ine
4、ach 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.1.3 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthri
5、sks 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 Asbestos: A Manual on Preventive and Co
6、ntrolMeasures.”21.4 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 regulatory limitations prior to use
7、. See Note 1 and 1.3for specific hazard warnings.2. Referenced Documents2.1 ASTM Standards:3C150 Specification for Portland CementC430 Test Method for Fineness of Hydraulic Cement by the45-m (No. 325) SieveC1124 Test Method for Kerosene Retention of AsbestosD2590 Test Method for Sampling Chrysotile
8、AsbestosD2946 Terminology for Asbestos and AsbestosCementProductsD3752 Test Method for Strength Imparted by Asbestos to aCementitious MatrixD3879 Test Method for Sampling Amphibole Asbestos4D3880 Test Method for Asbestos Strength UnitsE177 Practice for Use of the Terms Precision and Bias inASTM Test
9、 Methods2.2 ACS Document:Specifications of the Committee on Analytical Reagents ofthe American Chemical Society53. 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 i
10、n the industrialprocess, and it is added to the same mix using representativeingredients and process water. If the 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 D3
11、752) under avacuum of 90 kPa 70 cm Hg. The end point is determined asthe point when air begins to pass through the filter 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 m
12、ethod can be used to estimate the speed ofdrainage and the rate of production of products from the fiberevaluated, in industrial 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.1T
13、his test method is under 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, 2009. Published March 2010. Originallyapproved in 1989. Last
14、previous edition approved in 2004 as C1119 90(2004)1.DOI: 10.1520/C1119_C1119M-90R09E01.2Available 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 informat
15、ion, refer to the standards Document Summary page onthe ASTM website.4Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.5Available from American Chemical Society, 1155 16th St. NW, Washington,DC 20036.1Copyright ASTM International, 100 Barr Harbor Drive, P
16、O Box C700, West Conshohocken, PA 19428-2959, United States.6. Apparatus6.1 Drainage Apparatus, as described in Fig. 1 and Fig. 2.The funnel shown in Fig. 1 shall be cemented to the bottom ofPart 3 of Fig. 2 to give an air-tight seal. Alternatively, theapparatus described in Test Method C1124 or in
17、Test MethodD3752, 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
18、cm Hg vacuumcapacity, and a water trap with a capacity of 500 cm.6.3 Wet Mixer, as shown in Fig. 3, Fig. 4, and Fig. 5, capableof maintaining a speed of 62.8 6 2.6 rad/s 600 6 25 r/minunder load.Alternatively, the mixing apparatus, as described inTest Method D3880, may be used.6.3.1 The impeller sha
19、ll rotate clockwise when lookingfrom above, and the vanes shall be pitched so as to impel theslurry downward.6.3.2 Maximum clearance between the impeller and theconical wall of the wet mixer shall be set at 6.3 mm.6.3.3 The distance between the bottom of the impeller andthe top of the stopper shall
20、be set at 1 6 0.1 cm.6.4 Source of Vacuum,at906 0.2 kPa 70 6 0.2 cm Hg.6.5 Fiberizer, such as described in Test Method D3752. Thisis needed only if the fiber to be evaluated is not available at therequired degree of fiberization.7. Reagents and Materials7.1 Reagents and Materials(See Note 1 and Note
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