ASTM_C_953_-_10.pdf

Designation:C95310Standard 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,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 ofsetting of hydraulic cement grout mixtures used in preplaced-aggregate(PA)concrete using the vicat apparatus.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C125 Terminology Relating to Concrete and Concrete Ag-gregatesC191 Test Methods for Time of Setting of Hydraulic Cementby Vicat NeedleC219 Terminology Relating to Hydraulic CementC938 Practice for Proportioning Grout Mixtures forPreplaced-Aggregate ConcreteC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and Concretes3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminologies C125 and C219.4.Summary of Method4.1 The time of setting,initial and final,of a sample of fluidgrout is determined using the Vicat apparatus.5.Significance and Use5.1 This test method determines the setting time of groutmixed to the fluid consistency required for its use in PAconcrete.5.2 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.6.Apparatus6.1 Vicat Apparatus,in accordance with Test Method C191.6.2 Moist Room,maintained in accordance with Specifica-tion C511.7.Test Sample7.1 The test sample shall consist of at least 300 mL of grouttaken from a freshly-mixed batch prepared in accordance withPractice C938 obtained from a mixer at the laboratory orconstruction site.8.Procedure8.1 Warm the Vicat conical ring and base plate to approxi-mately 100 C.8.2 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 contactwith the base plate and allow the conical ring and plate to coolto room temperature.8.3 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 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 of time of set.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.41 on Hydraulic Cement Grouts.Current edition approved June 15,2010.Published July 2010.Originallyapproved in 1981.Last previous edition approved in 2006 as C95306.DOI:10.1520/C0953-10.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.4 Store the specimen in the moist room.8.5 Determine the time of setting using the proceduredescribed in Test Method C191 except that the first readingshall be taken 3 h 6 15 min after pouring the specimen.NOTE1Grouts used to evaluate grout fluidifier or for use in PAconcrete will normally reach initial set 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 andminutes,9.1.3 Temperature of group sample at the beginning of thetest,and9.1.4 Ambient temperature during the test.10.Precision and Bias10.1 PrecisionWhen data have been compiled that aresuitable for use in preparing a precision statement,suchstatement will be prepared.10.2 BiasNo statement on Bias can be prepared becausethere 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 te