1、Designation:C43008(Reapproved 2015)Standard Test Method forFineness of Hydraulic Cement by the 45-m(No.325)Sieve1This standard is issued under the fixed designation C430;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of las
2、t revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the fine-ness of hydraulic cement by means of the 45-m(No.325)sieve.1.2 The valu
3、es stated in SI units are to be regarded as thestandard.The inch-pound equivalents of SI units may beapproximate.1.3 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 safet
4、y and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE161 Specification for Precision Electroformed SievesE177 Practice for Use of the Terms Precision a
5、nd Bias inASTM Test Methods3.Apparatus3.1 Sieve:3.1.1 Sieve FrameThe sieve frame shall be of metal notsubject to corrosion by water and shall be circular,either 51 66 mm(2.0 6 0.25 in.)when woven-wire cloth is mounted inthe frame or 76 6 6 mm(3.0 6 0.25 in.)in diameter when anelectroformed sheet is
6、mounted in the frame.The depth of thesieve from the top of the frame to the cloth or sheet shall be 766 6 mm(3.0 6 0.25 in.).The frame shall have either side wallsof 89 6 6 mm(3.5 6 0.25 in.)in total height,or legs at least12 mm(0.5 in.)in length,sufficient to allow air circulationbeneath the sieve
7、cloth or electroformed sheet.3.1.2 Sieve Cloth or Electroformed SheetThe sieve frameshall be fitted with either a 45-m(No.325)stainless steelAISIType 304 woven-wire sieve cloth,conforming to the require-ments of Specification E11 or a 45-m electroformed rein-forced nickel sieve sheet conforming to t
8、he requirements ofSpecification E161 with the exception that the number ofopenings shall be 71 6 2 per linear centimetre(180 6 5 perlinear inch).3.1.3 Cloth or Sheet Mounting:3.1.3.1 Woven-Wire Cloth MountingType 304 stainlesssteel woven-type cloth shall be mounted in the frame withoutdistortion,loo
9、seness,or wrinkling.For a sieve fabricated bysoldering the cloth to the frame,the joint shall be made smoothto prevent the cement from catching in the joints between thesieve cloth and the frame.Two-piece sieves shall clamp tightlyon the cloth to prevent the cement from catching in the jointsbetween
10、 the sieve cloth and the frame.3.1.3.2 ElectroformedSieveSheetMountingElectroformed reinforced nickel sieve sheet shall be mountedin the frame without distortion,looseness,or wrinkling.Thejoint between the sieve cloth and the frame shall be madesmooth with a material impervious to water.3.2 Spray No
11、zzleThe spray nozzle(Fig.1)shall be con-structed of metal not subject to corrosion by water and shall be17.5 mm(0.69 in.)in inside diameter with a central hole drilledin line with the longitudinal axis,an intermediate row of eightholes drilled 6 mm(0.23 in.)center-to-center at an angle of 5from the
12、longitudinal axis,and an outer row of eight holesdrilled 11 mm(0.44 in.)center-to-center at an angle of 10from the longitudinal axis.All holes shall be 0.5 mm(0.02 in.)in diameter.The spray nozzle shall have been checked withinsix months prior to testing a cement sample to ensure that theflow rate i
13、s between 1500 and 3000 g/min at 69 6 3 kPa(106 0.4 psi).3.3 Pressure GageThe pressure gage shall be 76 mm(3.0in.)minimum diameter,and shall be graduated in 7-kPa(1-psi)increments,and shall have a maximum capacity of 207 kPa(30psi).The accuracy at 69 kPa(10 psi)shall be 62 kPa(60.25psi).4.Calibratio
14、n of 45-m(No.325)Sieve4.1 Place 1.000 g of the current lot of National Institute ofStandards and Technology standard sample No.114 or No.46h1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.25 on Fineness.Current edition a
15、pproved Oct.1,2015.Published October 2015.Originallyapproved in 1959.Last previous edition approved in 2008 as C430 08.DOI:10.1520/C0430-08R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume
16、 information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 on the clean,dry,45-m(No.325)sieve and proceed as inSection 5.The sieve correction factor is the difference betweenthe test residue obtained and the assigned residue valueindicated by the electroformed sheet sieve fineness specifiedfor the standard
