1、Designation: C1437 15Standard Test Method forFlow of Hydraulic Cement Mortar1This standard is issued under the fixed designation C1437; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthe
2、ses 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 flow ofhydraulic cement mortars.1.2 The values stated in SI units are to be regarded as thestandard. No oth
3、er units of measurement are included in thisstandard. When combined standards are cited, the selection ofthe measurement systems is at the users discretion subject tothe requirements of the referenced standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associate
4、d 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.2. Referenced Documents2.1 ASTM Standards:2C109/C109M Test Method for Compressive Strength ofHydraulic Ce
5、ment Mortars (Using 2-in. or 50-mm CubeSpecimens)C185 Test Method for Air Content of Hydraulic CementMortarC230/C230M Specification for Flow Table for Use in Testsof Hydraulic CementC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraul
6、ic Cements and Concretes3. Significance and Use3.1 This test method is intended to be used to determine theflow of hydraulic cement mortars, and of mortars containingcementitious materials other than hydraulic cements.3.2 While flow is not usually included in hydraulic cementspecifications, it is co
7、mmonly used in standard tests thatrequire the mortar to have a water content that provides aspecified flow level.4. Apparatus4.1 Flow Table, Flow Mold, Conforming to the require-ments of Specification C230/C230M.4.2 Caliper, Conforming to the requirements of Specifica-tion C230/C230M. Alternatively,
8、 any outside-measuring cali-per constructed of corrosion-resistant material may be used,provided that it is incremented in millimetres and its maximumextent of measuring is at least 260 mm.4.3 Tamper, conforming to the requirements of Test MethodC109/C109M.4.4 Trowel, having a steel blade 100 to 150
9、 mm in length,with straight edges. The edges when placed on a plane surfaceshall not depart from straightness by more than 1 mm.4.5 Straightedge, made of steel, shall be at least 200 mmlong and not less than 1.5 mm nor more than 3.5 mm inthickness. Its edge shall not depart from a plane surface bymo
10、re than 1 mm.5. Temperature and Humidity5.1 The temperature and relative humidity of the air in themixing room shall be as prescribed in Specification C511.6. Materials6.1 Hydraulic Cement MortarA mortar for which thedetermination of flow is specified or desired.7. Procedure7.1 Determination of Flow
11、:7.1.1 Carefully wipe the flow table clean and dry, and placethe flow mold at the center. Place a layer of mortar about25 mm in thickness in the mold and tamp 20 times with thetamper. The tamping pressure shall be just sufficient to ensureuniform filling of the mold. Tamping should be uniformlydistr
12、ibuted over the cross section of each layer. For the bottomlayer this will necessitate inclining the tamper slightly whentamping near the perimeter. Then fill the mold with mortar andtamp as specified for the first layer. Cut off the mortar to a planesurface flush with the top of the mold by drawing
13、 thestraightedge or the edge of the trowel with a sawing motionacross the top of the mold. Wipe the table top clean and dry,being especially careful to remove any water from around theedge of the flow mold. Lift the mold away from the mortar1This test method is under the jurisdiction of ASTM Committ
14、ee C01 on Cementand is the direct responsibility of Subcommittee C01.22 on Workability.Current edition Dec. 1, 2015. Published December 2015. Originally approved in1999. Last previous edition approved in 2013 as C1437 13. DOI: 10.1520/C1437-15.2For referenced ASTM standards, visit the ASTM website,
15、www.astm.org, orcontact ASTM Customer Service at serviceastm.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,
16、 PO Box C700, West Conshohocken, PA 19428-2959. United States11 min after completing the mixing operation. Immediately dropthe table 25 times in 15 s, unless otherwise specified.7.1.2 If using the caliper specified in Specification C230/C230M, measure the diameter of the mortar along the fourlines s
17、cribed in the table top, recording each diameter as thenumber of caliper divisions, estimated to one tenth of adivision. If some other caliper is being used, measure thediameter of the mortar along the four lines scribed in the tabletop, recording each diameter to the nearest millimetre.8. Calculati
18、on8.1 The flow is the resulting increase in average basediameter of the mortar mass, expressed as a percentage of theoriginal base diameter.8.2 If using the caliper specified in Specification C230/C230M, add the four readings, and record the total. This givesthe flow in percent.8.2.1 If using some o
19、ther caliper, compute the flow inpercent by dividing “A” by the original inside base diameter inmillimetres and multiplying by 100.where:A = average of four readings in millimetres, minus theoriginal inside base diameter in millimetres.9. Report9.1 Report the flow to the nearest 1 %.10. Precision an
20、d Bias10.1 PrecisionThe single-operator, within-laboratorystandard deviation has been found to be 4 % flow. Therefore,results of two properly conducted tests by the same operator onsimilar batches should not differ by more than 11 % (Note 1).10.1.1 The multilaboratory standard deviation has beenfoun
21、d to be 11 %. Therefore, results of two different laborato-ries on similar batches should not differ by more than 31 %flow (Note 1).NOTE 1Data produced when water content is being varied to obtain agiven flow is not applicable for this purpose. Only data where flow hasbeen determined using a given c
22、ement and fixed water content isapplicable. Consequently, the only data currently available is that ex-tracted from the CCRL Proficiency Sample Program for CS Flow onC109/C109M mortars (dropping the flow table 25 times in 15 s). The datafor Sample Nos. 109, 110, 111, and 112 have been used to develo
23、p theprecision statements given.10.2 BiasSince there is no accepted reference materialsuitable for determining flow available, no statement on bias ismade.11. Keywords11.1 flow; hydraulic cement; mortarSUMMARY OF CHANGESCommittee C01 has identified the location of selected changes to this test metho
24、d since the last issue,C1437 13, that may impact the use of this test method. (Approved Dec. 1, 2015)(1) Previous Note 1 was removed. (2) 1.2 was revised.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.
25、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 time by the responsible technical committee and must be reviewed ev
26、ery 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 receive careful consideration at a meeting of theresponsible tech
27、nical 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 International, 100 Barr Harbor Drive, PO Box C700, West Conshohoc
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