ASTM C230 C230M-2013 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格》.pdf

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1、Designation: C230/C230M 08C230/C230M 13Standard Specification forFlow Table for Use in Tests of Hydraulic Cement1This standard is issued under the fixed designation C230/C230M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the ye

2、ar 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.1. Scope*Scope1.1 This specification covers requirements for the flow table and accessory apparatus (Note 1) used in making

3、flow tests forconsistency of mortars in tests of hydraulic cement, such as but not limited to Test Method C1437.NOTE 1To help clarify the design of the flow table and accessory apparatus see the drawing in Fig. 1 Fig. 2. This drawing is for informationalpurposes only.1.2 The values stated in either

4、SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard. It is permissib

5、le to use an inch-pound caliper and mold with a SIflow table or a SI caliper and mold with an inch-pound flow table. It is not permissible to mix a SI mold with an inch-pound caliperor an inch-pound mold with a SI caliper.1.3 This standard does not purport to address all of the safety concerns, if a

6、ny, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C1437 Test Method for Flow of Hydraulic Cement Morta

7、r3. Flow Table and Frame3.1 The flow table apparatus shall consist of an integrally cast rigid iron frame and a circular rigid table top 10 6 0.1 in. 2556 2.5 mm in diameter, with a shaft attached perpendicular to the table top by means of a screw thread. The table top and shaftwith contact shoulder

8、 shall be mounted on a frame in such a manner that it can be raised and dropped vertically through thespecified height of 0.500 6 0.005 in. 12.76 12.7 6 0.13 mm for new tables and of 0.500 6 0.015 in. 12.7 6 0.38 mm fortables in use, by means of a rotated cam. The table top shall have a fine machine

9、d plane surface, free of blowholes and surfacedefects. The top shall be scribed with eight equidistant lines 258 in. 68 mm long, extending from the outside circumference towardthe center of the table. Each line shall end with a scribed arc, 14 in. 6 mm long, whose center point is the center of the t

10、able topwith a radius of 238 in. 59.5 mm. The scribe lines shall be made with a 60 tool to a depth of 0.01 in. 0.25 mm. The table topshall be of cast brass or bronze having a Rockwell hardness number not less than 25 HRB with an edge thickness of 0.3 in. 7.5mm, and shall have six integral radial sti

11、ffening ribs. The table top and attached shaft shall weigh 9 6 0.1 lb 4.08 6 0.05 kgand the weight shall be symmetrical around the center of the shaft.3.2 The cam and vertical shaft shall be of medium carbon machinery steel, hardened on the end of the shaft contacting the camand the tip of the cam c

12、ontacting the shaft. The shaft shall be straight and the difference between the diameter of the shaft and thediameter of the bore of the frame shall be not less than 0.002 in. 0.05 mm and not more than 0.003 in. 0.08 mm for new tablesand shall be maintained at 0.002 to 0.010 in. 0.05 to 0.25 mm for

13、tables in use. The end of the shaft shall not fall upon the camat the end of the drop, but shall make contact with the cam not less than 120 from the point of drop. The face of the cam shallbe a smooth spiraled curve of uniformly increasing radius from 12 to 114 in. 13 to 32 mm in 360 and there shal

14、l be no appreciablejar as the shaft comes into contact with the cam. The cam shall be so located and the contact faces of the cam and shaft shall besuch that the table does not rotate more than one revolution in 25 drops. The surfaces of the frame and of the table that come into1 This specification

15、is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.22 on Workability.Current edition approved July 1, 2008June 1, 2013. Published August 2008July 2013. Originally approved in 1949. Last previous edition approved in 20032008 asC230/C230M 03.

16、C230/C230M 08. DOI: 10.1520/C0230_C0230M-08.10.1520/C0230_C0230M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM w

17、ebsite.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult pr

18、ior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19

19、428-2959. United States1contact at the end of the drop shall be maintained smooth, plane, and horizontal and parallel with the upper surface of the tableand shall make continuous contact over a full 360.3.3 The supporting frame of the flow table shall be integrally cast of fine-grained, high-grade c

20、ast iron. The frame casting shallhave three integral stiffening ribs extending the full height of the frame and located 120 apart. The top of the frame shall be chilledto a depth of approximately 14 in. 6 mm, and the face shall be ground and lapped square with the bore to give 360 contact withthe sh

21、aft shoulder. The underside of the base of the frame shall be ground to secure a complete 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 gear speed reducerand flexible coupling. The speed of the cam sha

22、ft shall be approximately 100 r/min. The motor drive mechanism shall not befastened or mounted on the table base plate or frame.NOTE 2A 120-hp 40-W motor has been found adequate.3.5 The performance of a flow table shall be considered satisfactory if, in calibration tests, the table gives a flow valu

23、e that doesnot differ by more than 5 percentage points from flow values obtained with a suitable calibration material.3,4 (See Note 3).)3 Such a material can be obtained from the Cement and Concrete Reference Laboratory at the National Institute of Standards and Technology, Gaithersburg, MD20899.(ht

24、tp:/www.ccrl.us/).FIG. 1 Flow Table and Accessory Apparatus (Partial) (In./Lb)(in./lb)C230/C230M 132NOTE 3Some causes of and solutions to unsatisfactory performance of the flow table may be found in the section on flow tables in the ASTM Manualof Cement Testing.4. Flow Table Mounting4.1 The flow tab

25、le frame shall be tightly bolted to a cast iron or steel plate at least 1 in. 25 mm thick and 10 in. 250 mmsquare. The top surface of this plate shall be machined to a smooth plane surface. The plate shall be anchored to the top of aconcrete pedestal by four 12-in. 13-mm bolts that pass through the

26、plate and are imbedded at least 6 in. 150 mm in the pedestal.The pedestal shall be cast inverted on the base plate. A positive contact between the base plate and the pedestal shall be obtainedat all points. No nuts or other such leveling devices shall be used between the plate and the pedestal. Leve

27、ling shall be effectedby suitable means under the base of the pedestal.4.2 The pedestal shall be 10 to 11 in. 250 to 275 mm square at the top, and 15 to 16 in. 375 to 400 mm square at the bottom,25 to 30 in. 625 to 750 mm in height, and shall be of monolithic construction, cast from concrete weighin

28、g at least 140 lb/ft32240 kg/m3.Astable gasket cork padding, 12 in. 13 mm thick and the same size as the pedestal bottom or four pieces of padding12 in. 13 mm thick and approximately 4 in. 100 mm square, shall be inserted under the pedestal or the four corners, respectively.The flow table shall be c

29、hecked frequently for levelness of the table top, stability of the pedestal, and tightness of the bolts andnuts in the table base and the pedestal table. (A torque of 20 lbft 27 Nm is recommended when tightening those fastenings.)4 Supporting data have been filed at ASTM International Headquarters a

30、nd may be obtained by requesting Research Report RR:C01-1006.FIG. 1 Flow Table and Accessory Apparatus (Partial) (In./Lb)(in./lb) (continued)C230/C230M 1334.3 The table top, after the frame has been mounted on the pedestal, shall be level along two diameters at right angles to eachother, in both the

31、 raised and lowered positions.5. Flow Table Lubrication5.1 The vertical shaft of the table shall be kept clean and shall be lightly lubricated (See Note 4) with a light oil (SAE-10). Oilshall not be present between the contact faces of the table top and the supporting frame. Oil on the cam face will

32、 lessen wear andpromote smoothness of operation. The table should be raised and permitted to drop a dozen or more times just prior to use if ithas not been operated for some time.NOTE 4It has been demonstrated that an absence of lubrication on the table shaft will significantly reduce the flow readi

33、ng.6. Mold and Caliper6.1 The conical mold for casting the flow specimen shall be of cast bronze or brass. The Rockwell hardness number of the metalshall be not less than 25 HRB. The height of the mold shall be 2.00 6 0.02 in. 50.0 6 0.5 mm. The diameter of the top openingshall be 2.756 2.75 6 0.02

34、in. 70.0 6 0.5 mm for new molds and 2.75 + 0.05 in. 70.0 + 1.3 mm and 0.02 in. 0.5 mm formolds in use. The diameter of the bottom opening shall be 4.00 6 0.02 in. 100.0 6 0.5 mm for new molds and 4.00 + 0.05 in.+ 1.3 mm and 0.02 in. 0.5 mm for molds in use. The surfaces of the base and top shall be

35、parallel and at right angles to thevertical axis of the cone. The mold shall have a minimum wall thickness of 0.2 in. 5 mm. The outside of the top edge of the moldshall be shaped so as to provide an integral collar for convenient lifting of the mold. All surfaces shall be machined to a smoothfinish.

36、 A circular shield approximately 10 in. 255 mm in diameter, with a center opening approximately 4 in. 100 mm indiameter, made of nonabsorbing material not attacked by the cement, shall be used with the flow mold to prevent mortar fromspilling on the table top.FIG. 2 Flow Table and Accessory Apparatu

37、s (Partial) SIC230/C230M 134FIG. 2 Flow Table and Accessory Apparatus (Partial) SI (continued)C230/C230M 1356.2 A caliper consisting of one fixed jaw and one jaw movable along a permanent scale shall be provided for measuring thediameter of the mortar after it has been spread by the operation of the

38、 table. The scale shall be machine divided into 40 incrementswith 0.16 in. 4.0 mm between divisions with major division lines every 5 divisions and the increment number every 10 divisions(Note 5). The construction and accuracy of the caliper shall be such that the distance between the jaws shall be

39、4 6 0.01 in. 1006 0.25 mm when the indicator is set at zero.NOTE 5The caliper is graduated to indicate one fourth of the actual flow percentage, so that the readings of four measurements on the caliper maybe added to give the flow value without the necessity of calculating the average of four indivi

40、dual measurements of the total flow.SUMMARY OF CHANGESCommittee C01 has identified the location of selected changes to this specification since the last issue,C230/C230M 03, that may impact the use of this specification. (Approved July 1, 2008)(1) Revised 1.1 and added new 1.3.ASTM International tak

41、es no position respecting the validity of any patent rights 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 re

42、sponsibility.This standard is subject to revision at any time 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 address

43、ed to ASTM International Headquarters. Your comments will receive 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

44、 address shown below.This standard is copyrighted by ASTM International, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 2 Flow Table and Accessory Apparatus (Partial) SI (continued)C230/C230M 136