ASTM C230 C230M-2014 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 14Standard 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 year of last re

2、vision. 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 forconsi

3、stency of mortars in tests of hydraulic cement, such as butnot limited to Test Method C1437.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 inch-poun

4、d 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-pound

5、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 its use

6、. 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:2C1437 Test Method for Flow of Hydraulic Cement Mortar3. Flow Table and Frame

7、3.1 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 on a f

8、rame insuch a manner that it can be raised and dropped verticallythrough the specified height of 0.500 6 0.005 in. 12.7 60.13 mm for new tables and of 0.500 6 0.015 in. 12.7 60.38 mm for tables in use, by means of a rotated cam. Thetable top shall have a fine machined plane surface, free ofblowholes

9、 and surface defects. The top shall be scribed witheight equidistant lines 258 in. 68 mm long, extending fromthe outside circumference toward the center of the table. Eachline shall end with a scribed arc,14 in. 6 mm long, whosecenter point is the center of the table top with a radius of 238 in.59.5

10、 mm. The scribe lines shall be made with a 60 tool to adepth of 0.01 in. 0.25 mm. The table top shall be of cast brassor bronze having a Rockwell hardness number not less than 25HRB with an edge thickness of 0.3 in. 7.5 mm, and shall havesix integral radial stiffening ribs. The table top and attache

11、dshaft shall weigh 9 6 0.1 lb 4.08 6 0.05 kg and the weightshall be 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 be st

12、raight 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.0.08 mm for new tables and shall be maintained at 0.002 to0.010 in. 0.05 to 0.25 mm for tables in use. The end of theshaft shall not

13、 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 comesinto c

14、ontact 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, andho

15、rizontal 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 height o

16、f the frame and located 120 apart. The top of theframe shall be chilled to a depth of approximately14 in.6 mm, and the face shall be ground and lapped square with1This specification is under the jurisdiction of ASTM Committee C01 onCement and is the direct responsibility of Subcommittee C01.22 on Wo

17、rkability.Current edition approved Oct. 1, 2014. Published October 2014. Originallyapproved in 1949. Last previous edition approved in 2013 as C230/C230M 13.DOI: 10.1520/C0230_C0230M-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceas

18、tm.org. For Annual Book of ASTMStandards volume 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 Sta

19、tes1the bore to give 360 contact with the shaft shoulder. Theunderside 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 fl

20、exible coupling. The 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 verificat

21、ion tests, the table 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.) Perform the verification at least every 212 years.NOTE 3Some causes of and solutions to unsatisfactory performanceof the flow tab

22、le may 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 mm3Such a material can be obtained from the Cement and Concrete ReferenceLab

23、oratory (CCRL), http:/www.ccrl.us.4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:C01-1006.FIG. 1 Flow Table and Accessory Apparatus (Partial) (in./lb)C230/C230M 142square. The top surface of this plate shall be machined to asmo

24、oth plane surface. 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

25、shall be obtained 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 squ

26、are atthe bottom, 25 to 30 in. 625 to 750 mm in height, and shall beof monolithic construction, cast from concrete weighing atleast 140 lb ft32240 kg/m3. A stable gasket cork padding,12 in. 13 mm thick and the same size as the pedestal bottomor four pieces of padding12 in. 13 mm thick and approxi-ma

27、tely 4 in. 100 mm square, shall be inserted under thepedestal or the four corners, respectively. The flow table shallbe checked frequently for levelness of the table top, stability ofthe pedestal, and tightness of the bolts and nuts in the tablebase and the pedestal table. (A torque of 20 lbft 27 Nm

28、 isrecommended when tightening 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 cl

29、ean andshall be lightly lubricated (See Note 4) with a light oil(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 operation. The tableshould be raised and permitted to drop a dozen or m

30、ore timesjust prior to use if it has not been operated for some time.NOTE 4It has been demonstrated that an absence of lubrication on theFIG. 1 Flow Table and Accessory Apparatus (Partial) (in./lb) (continued)C230/C230M 143table shaft will significantly reduce the flow reading.6. Mold and Caliper6.1

31、 The conical mold for 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 2.75 6 0.02 in. 70.0 6 0.5 mm for newmolds an

32、d 2.75 + 0.05 in. 70.0 + 1.3 mm and 0.02 in.0.5 mm for molds in use. The diameter of the bottomopening shall be 4.00 6 0.02 in. 100.0 6 0.5 mm for newmolds and 4.00 + 0.05 in. + 1.3 mm and 0.02 in. 0.5 mmfor molds in use. The surfaces of the base and top shall beparallel and at right angles to the v

33、ertical axis of the cone. Themold shall have a minimum wall thickness of 0.2 in. 5 mm.The outside of the top edge of the mold shall be shaped so asto provide an integral collar for convenient lifting of the mold.All surfaces shall be machined to a smooth finish. A circularshield approximately 10 in.

34、 255 mm in diameter, with acenter opening approximately 4 in. 100 mm in diameter,made of nonabsorbing material not attacked by the cement,shall be used with the flow mold to prevent mortar fromspilling on the table top.6.2 A caliper consisting of one fixed jaw and one jawmovable along a permanent sc

35、ale shall be provided 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

36、 5). The construc-tion 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

37、 calipermay be added 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) SIC230/C230M 144FIG. 2 Flow Table and Accessory Apparatus (Partial) SI (continued)C230/C230M 145SUMMARY OF

38、 CHANGESCommittee C01 has identified the location of selected changes to this standard since the last issue(C230/C230M 13) that may impact the use of this standard. (Approved Oct. 1, 2014.)(1) Revised subsection 3.5. (2) Revised footnotes 3 and 4.ASTM International takes no position respecting the v

39、alidity 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 responsibility.This standard is s

40、ubject 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 addressed to ASTM International Headq

41、uarters. 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 address shown below.This stan

42、dard 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 se

43、rviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 2 Flow Table and Accessory Apparatus (Partial) SI (continued)C230/C230M 146