1、Designation: C 1437 01Standard Test Method forFlow of Hydraulic Cement Mortar1This standard is issued under the fixed designation C 1437; 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 parent
2、heses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 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. Valu
3、es in parentheses are for information only.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 safety and health practices and determine the applica-bility of regulato
4、ry limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C 109 Test Method for Compressive Strength of HydraulicCement Mortars (Using 2-in. or 50-mm Cube Speci-mens)2C 185 Test Method for Air Content of Hydraulic CementMortar2C 230 Specification for Flow Table for Use in Tests ofHydraul
5、ic Cement23. 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 commonly used in
6、 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 C 230.4.2 Caliper, Conforming to the requirements of Specifica-tion C 230. Alternatively, any outside-measuring c
7、aliper con-structed of corrosion-resistant material may be used, providedthat it is incremented in millimetres and its maximum extent ofmeasuring is at least 260 mm (1014 in.).4.3 Tamper, conforming to the requirements of Test MethodC 109.4.4 Trowel, having a steel blade 100 to 150 mm (4 to 6 in.)in
8、 length, with straight edges. The edges when placed on aplane surface shall not depart from straightness by more than 1mm (0.04 in.) (Note 1).4.5 Straightedge, made of steel, shall be at least 200 mm (8in.) long and not less than 1.5 mm (0.06 in.) nor more than 3.5mm (0.14 in.) in thickness. Its edg
9、e shall not depart from aplane surface by more than 1 mm (0.04-in.) (Note 1).NOTE 1The trowel specified in Test Method C 109 and the straight-edge specified in Test Method C 185 may be used for this purpose,providing they comply with the planeness indicated.5. Temperature and Humidity5.1 The tempera
10、ture of the air in the laboratory shall bemaintained between 20 and 28C (68 and 82F) and its relativehumidity shall not be less than 50 %.6. Materials6.1 Hydraulic Cement MortarA mortar for which thedetermination of flow is specified or desired.7. Procedure7.1 Determination of Flow:7.1.1 Carefully w
11、ipe the flow table clean and dry, and placethe flow mold at the center. Place a layer of mortar about 25mm (1 in.) in thickness in the mold and tamp 20 times with thetamper. The tamping pressure shall be just sufficient to ensureuniform filling of the mold. Then fill the mold with mortar andtamp as
12、specified for the first layer. Cut off the mortar to a planesurface flush with the top of the mold by drawing 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
13、 the flow mold. Lift the mold away from the mortar 1min 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 C 230,measure the diameter of the mortar along the four lines scribedin the tabl
14、e top, recording each diameter as the number ofcaliper divisions, estimated to one tenth of a division. If someother caliper is being used, measure the diameter of the mortar1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C0
15、1.22 on Workability.Current edition Aug. 10, 2001. Published October 2001. Originally published asC 1437 - 99. Last previous edition C 1437 - 99.2Annual Book of ASTM Standards, Vol 04.01.1Copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.along the f
16、our lines scribed in the table top, recording eachdiameter to the nearest millimetre.8. Calculation8.1 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 C 230, addt
17、he four readings, and record the total. This gives the flow inpercent. If using some other 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 di
18、ameter in millimetres.Report the flow to the nearest 1 %.9. Precision and Bias9.1 PrecisionThe single-operator, within-laboratory stan-dard 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
19、 11 % (Note 2).9.1.1 The multilaboratory standard deviation has beenfound to be 11 %. Therefore, results of two different laborato-ries on similar batches should not differ by more than 31 %flow (Note 2).NOTE 2Data produced when water content is being varied to obtain agiven flow is not applicable f
20、or this purpose. Only data where flow hasbeen determined using a given cement and fixed water content isapplicable. Consequently, the only data currently available is that ex-tracted from the CCRL Proficiency Sample Program for CS Flow onC 109 mortars (dropping the flow table 25 times in 15 s). The
21、data forSample Nos. 109, 110, 111, and 112 have been used to develop theprecision statements given.9.2 BiasSince there is no accepted reference materialsuitable for determining flow available, no statement on bias ismade.10. Keywords10.1 flow; hydraulic cement; mortarThe ASTM International takes no
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23、bility.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 addressed to
24、 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 addr
25、ess 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).C 14372
