1、Designation: C 953 06Standard Test Method forTime of Setting of Grouts for Preplaced-Aggregate Concretein the Laboratory1This standard is issued under the fixed designation C 953; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This method covers the determination test of time ofsetting of hydraulic cement grout mixtures used in prep
3、laced-aggregate (PA) concrete using the vicat apparatus.1.2 The values stated in SI units are to be regarded as thestandard.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 appr
4、o-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 191 Test Methods for Time of Setting of HydraulicCement by Vicat NeedleC 938 Practice for Proportioning Grout Mixtures forPreplaced-Aggregate Conc
5、reteC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraulic Cements and Concretes3. Summary of Method3.1 The time of setting, initial and final, of a sample of fluidgrout is determined using the Vicat apparatus.4. Significance and Use4
6、.1 This test method determines the setting time of groutmixed to the fluid consistency required for its use in PAconcrete.4.2 The time of setting is also useful in determining theacceptability of components of grout that must be mixed to thefluid consistency required for production of PA concrete.5.
7、 Apparatus5.1 Vicat Apparatus, in accordance with Test Method C 191.5.2 Moist Room, maintained in accordance with Specifica-tion C511.6. Test Sample6.1 The test sample shall consist of at least 300 mL of grouttaken from a freshly-mixed batch prepared in accordance withPractice C 938 obtained from a
8、mixer at the laboratory orconstruction site.7. Procedure7.1 Warm the Vicat conical ring and base plate to approxi-mately 100 C.7.2 Apply a thin film of paraffin wax to the base of theconical ring and place the waxed conical ring on the base plate.Place a weight on the conical ring to ensure intimate
9、 contactwith the base plate and allow the conical ring and plate to coolto room temperature.7.3 Fill the conical ring apparatus with grout flush with itstop within 2 min after completion of mixing. Strike off thegrout flush with the top of the conical ring by a single obliquestroke of a sharp-edged
10、trowel held at a slight angle to the topof the ring. Smooth the top, if necessary, with a few lighttouches of the pointed end of the trowel. Take care not tocompress the sample during these cutting and smoothingoperations. The time of completion of molding shall be takenas the start of measurement o
11、f time of set.7.4 Store the specimen in the moist room.7.5 Determine the time of setting using the proceduredescribed in Test Method C 191 except that the first readingshall be taken 3 h 6 15 min after pouring the specimen.NOTE 1Grouts used to evaluate grout fluidifier or for use in PAconcrete will
12、normally reach initial set in about 4 h.8. Report8.1 The report shall include the following:8.1.1 Identification of the grout sample,8.1.2 Time of initial setting and final setting in hours andminutes,8.1.3 Temperature of group sample at the beginning of thetest, and1This test method is under the ju
13、risdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.41 on Concrete for Radiation Shielding.Current edition approved Feb. 1, 2006. Published February 2006. Originallyapproved in 1981. Last previous edition approved in 1997 as C 953 8
14、7(1997).2For referenced ASTM standards, visit the ASTM website, 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.1*A Summary of Changes section appears at the end of
15、this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8.1.4 Ambient temperature during the test.9. Precision and Bias9.1 PrecisionWhen data have been compiled that aresuitable for use in preparing a precision statement, suchst
16、atement will be prepared.9.2 BiasNo statement on Bias can be prepared becausethere are no standard reference materials.10. Keywords10.1 grout; preplaced-aggregate concrete; time of settingSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this test method since the la
17、st issue,C 953 87(1997), that may impact the use of this test method. (Approved February 1, 2006)(1) Added new paragraph 1.2 and renumbered subsequentparagraphs.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this sta
18、ndard. 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 revi
19、ewed 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 Headquarters. Your comments will receive careful consideration at a meeting of theresponsib
20、le 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 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).C953062
