1、Designation: C266 081C266 13Standard Test Method forTime of Setting of Hydraulic-Cement Paste by GillmoreNeedles1This standard is issued under the fixed designation C266; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEFig. 1 was corrected editorially in July 2011.1. Scope*1.1 This test method covers the determination of the time of setting
3、of hydraulic-cement paste by means of the Gillmore needles.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This standard does n
4、ot purport to address all of the safety concerns, if any, 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.Warning: Fresh hydraulic cementitious mix
5、tures are caustic and may cause chemical burns to skin and tissue upon prolongedexposure. The use of gloves, protective clothing, and eye protection is recommended. Wash contact area with copious amounts ofwater after contact. Wash eyes for a minimum of 15 min. Avoid exposure of the body to clothing
6、 saturated with the liquid phaseof the unhardened material. Remove contaminated clothing immediately after exposure.21.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consider
7、ed as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:3C151 Test Method for Autoclave Expansion of Hydraulic CementC183 Practice for Sampling and the Amount of Testing of Hydraulic CementC187 Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement P
8、asteC219 Terminology Relating to Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic ConsistencyC511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of HydraulicCements and ConcretesC670 Practi
9、ce for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsC1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing ofHydraulic CementsD1193 Specification for Reagent Water3. Terminology3.1 Refer to Terminolog
10、y C219 for definitions of terms.4. Summary of Test Method4.1 Sufficient water is added to the cement that is being tested to produce a paste of normal consistency. A specimen is moldedfrom this paste and is tested for time of setting by means of the Gillmore initial and final needles. The initial ti
11、me of setting is the1 This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.30 on Time of SetCurrent edition approved June 1, 2008Dec. 1, 2013. Published July 2008January 2014. Originally approved in 1951. Last previous editio
12、n approved in 20072008 asC266 07.C266 081. DOI: 10.1520/C0266-08.10.1520/C0266-13.2 Section on Safety, Manual of Cement Testing, Annual Book of ASTM Standards, Vol 04.01.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annua
13、l Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.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 t
14、echnically possible to adequately depict all changes accurately, ASTM recommends that users consult prior 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 t
15、his standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1time elapsed between initial contact of cement and water and the time when the Gillmore Initial needle does not leave a completecircular impression in the paste surface. The
16、final time of setting is the time elapsed between initial contact of cement and waterand the time when the Gillmore Final needle does not leave a complete circular impression in the paste surface.5. Significance and Use5.1 The purpose of this test method is to establish whether a cement complies wit
17、h a specification limit on Gillmore time ofsetting.6. Apparatus6.1 Flat Trowel, having a sharpened straight-edged steel blade 100 to 150 mm in length. The edges when placed on a planesurface shall not depart from straightness by more than 1 mm.6.2 Mixer, Bowl, Paddle, and Scraper, conforming to the
18、requirements of Practice C305.6.3 Glass Graduates, 200 or 250 mL capacity, conforming to the requirements of Specification C1005.FIG. 1 Gillmore Apparatus and Test SpecimenC266 1326.4 Mass Determining Devices, conforming to the requirements of Specification C1005. The devices for determining mass sh
19、allbe evaluated for precision and accuracy at a total load of 1000 g.6.5 Plane Non-absorptive Plates, 100 mm 6 5 mm square, of similar planeness, corrosivity, and absorptivity to that of glass(see Test Method C187 Fig. 1, item H).6.6 Gillmore Needles, conforming to the following requirements:6.6.1 T
20、he initial time of setting needle shall have a mass of 0.250 6 0.001 lb (113.4 6 0.5 g) and a tip diameter of 0.084 60.002 in. (2.12 6 0.05 mm).6.6.2 The final time of setting needle shall have a mass of 1.000 6 0.001 lb (453.6 6 0.5 g) and a tip diameter of 0.042 6 0.002in. (1.06 6 0.05 mm).6.6.3 T
21、he needle tips shall be cylindrical for a distance of 0.189 6 0.020 in. (4.8 6 0.5 mm). The needle ends shall be planeand at right angles to the axis of the rod and shall be maintained in a clean condition (See Note 1).6.7 Inspect and document Section 6 apparatus for conformance to the requirements
22、of this test method at least every 2 12 years.NOTE 1The Gillmore needles should preferably be mounted as shown in Fig. 1 (b).7. Reagents7.1 Mixing WaterPotable water is satisfactory for routine tests. For all referee and cooperative tests, reagent water conformingto the requirements of Specification
23、 D1193 for Type III or Type IV grade of reagent water shall be used.8. Sampling8.1 When the test is part of acceptance testing, sample the cement in accordance with Practice C183.9. Conditioning9.1 Maintain the temperature of the room, dry materials, paddle, bowl, and plane non-absorptive plates at
24、23.0 6 3.0 C.Maintain the temperature of the mixing water at 23.0 6 2.0 C.9.2 Maintain the relative humidity of the mixing room at not less than 50%.9.3 The moist cabinet or moist room shall conform to the requirements of Specification C511.10. Procedure10.1 Preparation of Cement Paste: Obtain the c
25、ement paste used for determination of the time of setting from one of thefollowing methods:10.1.1 Prepare a new batch of paste by mixing 650 g of cement with the percentage of mixing water required for normalconsistency (Test Method C187), following the procedure described in Practice C305.10.1.2 At
26、 the option of the tester, use the paste remaining from the batch used for the autoclave expansion specimen (TestMethod C151) or from the normal consistency determination (Test Method C187).10.2 Molding Test SpecimenFrom the cement paste prepared as described in 10.1, make a pat with a flat top and
27、the sidestapering to a thin edge on a plane non-absorptive plate, conforming to the dimensions and tolerances in Fig. 1 (a). In molding thepat, flatten the cement paste first on the plate and then form the pat by drawing the trowel from the outer edge toward the center,then flattening the top. After
28、 making, place the pat in the moist cabinet or moist room and allow it to remain there except whenthe determinations of time of setting are being made.10.3 Time of Setting DeterminationDetermine the time of setting by holding the needle in a vertical position and lightlyapplying it to the surface of
29、 the pat.10.3.1 Using the Initial Gillmore needle, determine the Gillmore Initial time of setting end point to be the first penetrationmeasurement that does not mark the specimen surface with a complete circular impression. Verify Initial set by obtaining twoadditional penetration measurements on di
30、fferent areas of the specimen surface.Verification measurements must be obtained within90 s of the first “initial set” measurement. The elapsed time, in minutes, between the time of contact of cement and mixing waterand the end point determined above is the Gillmore initial time of setting.10.3.2 Us
31、ing the Final Gillmore needle, determine the Gillmore Final time of setting end point to be the first penetrationmeasurement that does not mark the specimen surface with a complete circular impression. Verify Final set by obtaining twoadditional penetration measurements on different areas of the spe
32、cimen surface.Verification measurements must be obtained within90 s of the first “final set” measurement. The elapsed time, in minutes, between the time of contact of cement and mixing waterand the end point determined above is the Gillmore final time of setting.11. Report11.1 Report the time of set
33、ting, to the nearest 5 min, as follows:Initial Time of Setting, GillmoreFinal Time of Setting, Gillmore_ min_minC266 13312. Precision and Bias12.1 Precision, Precision, Gillmore Initial Time of Setting on samples testing between 100 and 341 min. (See Note 2)12.1.1 The single-operator (within laborat
34、ory) standard deviation has been found to be 16 min (1s), therefore, results of twoproperly conducted tests by the same operator on samples of the same cement should not differ from each other by more than 44min (d2s) (1s and d2s are defined in Practice C670).12.1.2 The multi-laboratory standard dev
35、iation has been found to be 28 min (1s), therefore, results of two properly conductedtests from two different laboratories should not differ from each other by more than 78 min (d2s).12.2 Precision, Precision, Gillmore Final Time of Setting on samples testing between 239 and 561 min (See Note 2).12.
36、2.1 The single-operator (within laboratory) standard deviation has been found to be 22 min (1s), therefore, results of twoproperly conducted tests by the same operator on samples of the same cement should not differ from each other by more than 62min (d2s).12.2.2 The multi-laboratory standard deviat
37、ion has been found to be 46 min (1s), therefore, results of two properly conductedtests from two different laboratories on samples of the same cement should not differ by more than 129 min (d2s).12.3 BiasBiasSince an acceptable reference material suitable for determining any bias of this method does
38、 not exist, nostatement on bias is being made.12.3.1 Since an acceptable reference material suitable for determining any bias of this method does not exist, no statement onbias is being made.NOTE 2This data is based upon CCRL Portland cement round robin test samples 47 to 138 and CCRL Masonry cement
39、 round robin test samples 1to 46.13. Keywords13.1 gillmore needles; hydraulic cement paste; time of settingSUMMARY OF CHANGESCommittee C01 has identified the location of selected changes to this test method since the last issue,C266 07C266 081, that may impact the use of this test method. (Approved
40、June 1, 2008)Dec.1, 2013)(1) Revised 4.1, 6.1, 6.4, and 9.2.(1) Revised warning statement in 1.3.C266 134(2) Revised the units statement in 1.2 and reversed the order of units throughout the standard editorially to comply with ASTMForm and Style.Committee C01 has identified the location of selected
41、changes to this test method since the last issue,C266 04, that may impact the use of this test method. (Approved July 15, 2007)(1) Added new 6.7.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of
42、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 every five
43、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 technical comm
44、ittee, 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 Conshohocken, PA 19
45、428-2959,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/).C266 135
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