ASTM C953-2017 Standard Test Method for Time of Setting of Grouts for Preplaced-Aggregate Concrete in the Laboratory《实验室预拌混凝土灌浆凝结时间的标准试验方法》.pdf

1、Designation: C953 10C953 17Standard Test Method forTime of Setting of Grouts for Preplaced-Aggregate Concretein the Laboratory1This standard is issued under the fixed designation C953; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision

2、, the year of 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. Scope*1.1 This method covers the determination test of time of setting of hydraulic cement grout mixtures used in

3、 preplaced-aggregate(PA) concrete using the vicatVicat apparatus.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It

4、 is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.WarningFresh hydraulic cementitious mixtures are caustic and may causechemical burns to skin and

5、tissue upon prolonged exposure.21.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organ

6、ization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete AggregatesC191 Test Methods for Time of Setting of Hydraulic Cement by Vicat NeedleC219 Terminology Relating to Hydraulic CementC938 Practice for Proporti

7、oning Grout Mixtures for Preplaced-Aggregate ConcreteC511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of HydraulicCements and Concretes3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method, refer to Terminol

8、ogies C125 and C219.4. Summary of Method4.1 The time of setting, initial and final, of a sample of fluid grout is determined using the Vicat apparatus.5. Significance and Use5.1 This test method determines the setting time of setting of grout mixed to the fluid consistency required for its use in PA

9、concrete.5.2 The time of setting is also useful in determining the acceptability of components of grout that must be mixed to the fluidconsistency required for production of PA concrete.1 This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the

10、direct responsibility of Subcommittee C09.41 onHydraulic Cement Grouts.Current edition approved June 15, 2010Dec. 15, 2017. Published July 2010January 2018. Originally approved in 1981. Last previous edition approved in 20062010 asC95306.10. DOI: 10.1520/C0953-10.10.1520/C0953-17.2 Section on Safety

11、 Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol. 04.02.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Docum

12、ent 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 technically possible to adequately depict all changes accurately, ASTM re

13、commends 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 this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box

14、C700, West Conshohocken, PA 19428-2959. United States16. Apparatus6.1 Vicat Apparatus, in accordance with Test Method C191.6.2 Moist Room, maintained in accordance with Specification C511.7. Test Sample7.1 The test sample shall consist of at least 300 mL of grout taken from a freshly-mixed batch pre

15、pared in accordance withPractice C938 obtained from a mixer at the laboratory or construction site.8. Procedure8.1 Warm the Vicat conical ring and base plate to approximately 100 C.8.2 Apply a thin film of paraffin wax to the base of the conical ring and place the waxed conical ring on the base plat

16、e. Placea weight on the conical ring to ensure intimate contact with the base plate and allow the conical ring and plate to cool to roomtemperature.8.3 Fill the conical ring apparatus with grout flush with its top within 2 min after completion of mixing. Strike off the grout flushwith the top of the

17、 conical ring by a single oblique stroke of a sharp-edged trowel held at a slight angle to the top of the ring.Smooth the top, if necessary, with a few light touches of the pointed end of the trowel. Take care not to compress the sample duringthese cutting and smoothing operations. The time of compl

18、etion of molding shall be taken as the start of measurement of time ofset.setting.8.4 Store the specimen in the moist room.8.5 Determine the time of setting using the procedure described in Test Method C191 except that the first reading shall be taken3 h 6 15 min after pouringmolding the specimen.NO

19、TE 1Grouts used to evaluate grout fluidifier or for use in PA concrete will normally reach initial setsetting in about 4 h.9. Report9.1 The report shall include the following:9.1.1 Identification of the grout sample,9.1.2 Time of initial setting and final setting in hours and minutes,9.1.3 Temperatu

20、re of group sample at the beginning of the test, and9.1.4 Ambient temperature during the test.10. Precision and Bias10.1 PrecisionWhen data have been compiled that are suitable for use in preparing a precision statement, such statement willbe prepared.10.2 BiasNo statement on Bias can be prepared be

21、cause there are no standard reference materials.11. Keywords11.1 grout; preplaced-aggregate concrete; time of settingSUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this test method since the last issue,C95306,10, that may impact the use of this test method. (Appro

22、ved Dec. 15, 2017June 15, 2010)(1) Added new Section 3 Terminology to reference appropriate terminology documents under C01 and C09 and renumberedsubsequent sections.(1) Revised 1.3.(2) Added Footnote 2 and renumbered subsequent footnotes.(3) Made editorial corrections to 1.1, 5.1, 8.3, 8.5, and Not

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