ASTM C230 C230M-2008 Standard Specification for Flow Table for Use in Tests of Hydraulic Cement《水凝水泥试验用流量表的标准规范》.pdf

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1、Designation: C 230/C 230M 08Standard Specification forFlow Table for Use in Tests of Hydraulic Cement1This standard is issued under the fixed designation C 230/C 230M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of las

2、t 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. Scope*1.1 This specification covers requirements for the flow tableand accessory apparatus (Note 1) used in making flow tests forc

3、onsistency of mortars in tests of hydraulic cement, such as butnot limited to Test Method C 1437.NOTE 1To help clarify the design of the flow table and accessoryapparatus see the drawing in Fig. 1 Fig. 2 . This drawing is forinformational purposes only.1.2 The values stated in either SI units or inc

4、h-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. It is permissible to use an inch-

5、pound caliperand mold with a SI flow table or a SI caliper and mold with aninch-pound flow table. It is not permissible to mix a SI moldwith an inch-pound caliper or an inch-pound mold with a SIcaliper.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with i

6、ts 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.2. Referenced Documents2.1 ASTM Standards:2C 1437 Test Method for Flow of Hydraulic Cement Mortar3. Flow Table an

7、d Frame3.1 The flow table apparatus shall consist of an integrallycast rigid iron frame and a circular rigid table top 10 6 0.1 in.255 6 2.5 mm in diameter, with a shaft attached perpendicu-lar to the table top by means of a screw thread. The table topand shaft with contact shoulder shall be mounted

8、 on a frame insuch a manner that it can be raised and dropped verticallythrough the specified height of 0.500 6 0.005 in. 12.76 0.13mm for new tables and of 0.500 6 0.015 in. 12.7 6 0.38 mmfor tables in use, by means of a rotated cam. The table top shallhave a fine machined plane surface, free of bl

9、owholes andsurface defects. The top shall be scribed with eight equidistantlines 258 in. 68 mm long, extending from the outsidecircumference toward the center of the table. Each line shallend with a scribed arc,14 in. 6 mm long, whose center pointis the center of the table top with a radius of 238 i

10、n. 59.5 mm.The scribe lines shall be made with a 60 tool to a depth of 0.01in. 0.25 mm. The table top shall be of cast brass or bronzehaving a Rockwell hardness number not less than 25 HRB withan edge thickness of 0.3 in. 7.5 mm, and shall have sixintegral radial stiffening ribs. The table top and a

11、ttached shaftshall weigh 9 6 0.1 lb 4.08 6 0.05 kg and the weight shallbe symmetrical around the center of the shaft.3.2 The cam and vertical shaft shall be of medium carbonmachinery steel, hardened on the end of the shaft contactingthe cam and the tip of the cam contacting the shaft. The shaftshall

12、 be straight and the difference between the diameter of theshaft and the diameter of the bore of the frame shall be not lessthan 0.002 in. 0.05 mm and not more than 0.003 in. 0.08mm for new tables and shall be maintained at 0.002 to 0.010in. 0.05 to 0.25 mm for tables in use. The end of the shaftsha

13、ll not fall upon the cam at the end of the drop, but shallmake contact with the cam not less than 120 from the point ofdrop. The face of the cam shall be a smooth spiraled curve ofuniformly increasing radius from12 to 114 in. 13 to 32 mm in360 and there shall be no appreciable jar as the shaft comes

14、into contact with the cam. The cam shall be so located and thecontact faces of the cam and shaft shall be such that the tabledoes not rotate more than one revolution in 25 drops. Thesurfaces of the frame and of the table that come into contact atthe end of the drop shall be maintained smooth, plane,

15、 andhorizontal and parallel with the upper surface of the table andshall make continuous contact over a full 360.3.3 The supporting frame of the flow table shall be inte-grally cast of fine-grained, high-grade cast iron. The framecasting shall have three integral stiffening ribs extending thefull he

16、ight of the frame and located 120 apart. The top of theframe shall be chilled to a depth of approximately14 in. 61This specification is under the jurisdiction of ASTM Committee C01 onCement and is the direct responsibility of Subcommittee C01.22 on Workability.Current edition approved July 1, 2008.

17、Published August 2008. Originallyapproved in 1949. Last previous edition approved in 2003 as C 230/C 230M 03.2For referenced 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 sta

18、ndards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.mm, and the face shall be ground and lapped square with thebore to give

19、 360 contact with the shaft shoulder. The under-side of the base of the frame shall be ground to secure acomplete contact with the steel plate beneath.3.4 The flow table shall be driven by a motor (Note 2),connected to the cam shaft through an enclosed worm gearspeed reducer and flexible coupling. T

20、he speed of the cam shaftshall be approximately 100 r/min. The motor drive mechanismshall not be fastened or mounted on the table base plate orframe.NOTE 2A120-hp 40-W motor has been found adequate.3.5 The performance of a flow table shall be consideredsatisfactory if, in calibration tests, the tabl

21、e gives a flow valuethat does not differ by more than 5 percentage points from flowvalues obtained with a suitable calibration material.3,4(SeeNote 3)3Such a material can be obtained from the Cement and Concrete ReferenceLaboratory at the National Institute of Standards and Technology, Gaithersburg,

22、 MD20899.4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: C011006.FIG. 1 Flow Table and Accessory Apparatus (Partial) (In./Lb)C 230/C 230M 082NOTE 3Some causes of and solutions to unsatisfactory performanceof the flow table may

23、be found in the section on flow tables in the ASTMManual of Cement Testing.4. Flow Table Mounting4.1 The flow table frame shall be tightly bolted to a cast ironor steel plate at least 1 in. 25 mm thick and 10 in. 250 mmsquare. The top surface of this plate shall be machined to asmooth plane surface.

24、 The plate shall be anchored to the top ofa concrete pedestal by four12-in. 13-mm bolts that passthrough the plate and are imbedded at least 6 in. 150 mm inthe pedestal. The pedestal shall be cast inverted on the baseplate. A positive contact between the base plate and thepedestal shall be obtained

25、at all points. No nuts or other suchleveling devices shall be used between the plate and thepedestal. Leveling shall be effected by suitable means underthe base of the pedestal.4.2 The pedestal shall be 10 to 11 in. 250 to 275 mmsquare at the top, and 15 to 16 in. 375 to 400 mm square atthe bottom,

26、25 to 30 in. 625 to 750 mm in height, and shallbe of monolithic construction, cast from concrete weighing atleast 140 lb/ft32240 kg/m3. A stable gasket cork padding,12in. 13 mm thick and the same size as the pedestal bottom orfour pieces of padding12 in. 13 mm thick and approximately4 in. 100 mm squ

27、are, shall be inserted under the pedestal orthe four corners, respectively. The flow table shall be checkedfrequently for levelness of the table top, stability of thepedestal, and tightness of the bolts and nuts in the table baseand the pedestal table. (A torque of 20 lbft 27 Nm isrecommended when t

28、ightening those fastenings.)4.3 The table top, after the frame has been mounted on thepedestal, shall be level along two diameters at right angles toeach other, in both the raised and lowered positions.5. Flow Table Lubrication5.1 The vertical shaft of the table shall be kept clean andshall be light

29、ly lubricated (See Note 4) with a light oilFIG. 1 Flow Table and Accessory Apparatus (Partial) (In./Lb) (continued)C 230/C 230M 083(SAE-10). Oil shall not be present between the contact faces ofthe table top and the supporting frame. Oil on the cam face willlessen wear and promote smoothness of oper

30、ation. The tableshould be raised and permitted to drop a dozen or more timesjust prior to use if it has not been operated for some time.NOTE 4It has been demonstrated that an absence of lubrication on thetable shaft will significantly reduce the flow reading.6. Mold and Caliper6.1 The conical mold f

31、or casting the flow specimen shall beof cast bronze or brass. The Rockwell hardness number of themetal shall be not less than 25 HRB. The height of the moldshall be 2.00 6 0.02 in. 50.0 6 0.5 mm. The diameter of thetop opening shall be 2.756 0.02 in. 70.0 6 0.5 mm for newmolds and 2.75 + 0.05 in. 70

32、.0 + 1.3 mm and 0.02 in. 0.5mm for molds in use. The diameter of the bottom openingshall be 4.00 6 0.02 in. 100.0 6 0.5 mm for new molds and4.00 + 0.05 in. + 1.3 mm and 0.02 in. 0.5 mm for moldsin use. The surfaces of the base and top shall be parallel and atright angles to the vertical axis of the

33、cone. The mold shallhave a minimum wall thickness of 0.2 in. 5 mm. The outsideof the top edge of the mold shall be shaped so as to provide anintegral collar for convenient lifting of the mold. All surfacesshall be machined to a smooth finish. A circular shieldapproximately 10 in. 255 mm in diameter,

34、 with a centeropening approximately 4 in. 100 mm in diameter, made ofnonabsorbing material not attacked by the cement, shall beused with the flow mold to prevent mortar from spilling on thetable top.6.2 A caliper consisting of one fixed jaw and one jawmovable along a permanent scale shall be provide

35、d formeasuring the diameter of the mortar after it has been spreadby the operation of the table. The scale shall be machinedivided into 40 increments with 0.16 in. 4.0 mm betweendivisions with major division lines every 5 divisions and theincrement number every 10 divisions (Note 5). The construc-ti

36、on and accuracy of the caliper shall be such that the distancebetween the jaws shall be 4 6 0.01 in. 100 6 0.25 mm whenthe indicator is set at zero.NOTE 5The caliper is graduated to indicate one fourth of the actualflow percentage, so that the readings of four measurements on the calipermay be added

37、 to give the flow value without the necessity of calculatingthe average of four individual measurements of the total flow.FIG. 2 Flow Table and Accessory Apparatus (Partial) SIC 230/C 230M 084FIG. 2 Flow Table and Accessory Apparatus (Partial) SI (continued)C 230/C 230M 085SUMMARY OF CHANGESCommitte

38、e C01 has identified the location of selected changes to this specification since the last issue,C 230/C 230M 03, that may impact the use of this specification. (Approved July 1, 2008)(1) Revised 1.1 and added new 1.3.ASTM International takes no position respecting the validity of any patent rights

39、asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any tim

40、e by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will r

41、eceive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM I

42、nternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. 2 Flow Table and Accessory Apparatus (Partial) SI (continued)C 230/C 230M 086