ASTM_C_940_-_16.pdf

Designation:C94016Standard Test Method forExpansion and Bleeding of Freshly Mixed Grouts forPreplaced-Aggregate Concrete in the Laboratory1This standard is issued under the fixed designation C940;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.Scope1.1 This test method determines the amount of expansionand accumulation of bleed water at the surface of freshly mixedhydraulic-cement grout commonly used in the production ofpreplaced-aggregate(PA)concrete and cementitious post-tensioning tendon grouts.1.2 It is for use with hydraulic cement grout whether or notit includes fine aggregate or supplemental cementitious mate-rials or both.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C125 Terminology Relating to Concrete and Concrete Ag-gregatesC219 Terminology Relating to Hydraulic CementC937 Specification for Grout Fluidifier for Preplaced-Aggregate ConcreteC1064/C1064M Test Method for Temperature of FreshlyMixed Hydraulic-Cement ConcreteE1272 Specification for Laboratory Glass Graduated Cylin-ders3.Terminology3.1 For definitions of terms used in this standard,refer toTerminology C125 and Terminology C219.4.Summary of Test Method4.1 Grout is placed in a graduated cylinder.Changes in totalvolume and accumulation of bleed water,if any,on the surfaceof the grout are observed over a period of time.5.Significance and Use5.1 This test method is useful for determining the expansionand bleeding characteristics of freshly mixed fluid hydrauliccement grout commonly used in PA concrete and cementitiouspost-tensioning tendon grouts.6.Interferences6.1 Failure to obtain a uniformly smooth mixture,free oflumps,will cause excessive bleeding and may result in reducedexpansion.6.2 The capability of most admixtures to produce expansionand the tendency to bleed is related to the temperature of thegrout during the period of test.7.Apparatus7.1 Glass Graduate,1000 mL and meeting the requirementsof Specification E1272 Style I or III TC.7.2 Glass Graduate,25 mLand meeting the requirements ofSpecification E1272 Style I or III TC.7.3 Temperature Measuring Device,meeting the require-ments of Test Method C1064/C1064M.8.Test Sample8.1 The grout test sample shall consist of approximately1500 mL and shall be representative of the grout in the mixer.9.Procedure9.1 When sampling and testing are being performed in thelaboratory for the purpose of designing or comparing mixturesor for qualifying admixtures including grout fluidifiers proceedin the following manner: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 Feb.1,2016.Published March 2016.Originallyapproved in 1981.Last previous edition approved in 2010 as C94010a.DOI:10.1520/C0940-16.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 9.1.1 Maintain the ambient temperature of the room inwhich the test is performed at 23.0 6 2C,unless otherwisespecified.9.1.2 Bring the temperature of all dry materials and mixingwater to a constant temperature of 23.0 6 2C before mixing,unless otherwise specified.9.1.3 Start volume measurements within 3 min of comple-tion of mixing.9.2 When sampling and testing are being performed in thefield,record the temperature of the grout specimen and theambient temperature of the area in which the test readings aremade.Record the time interval between completion of mixingand start of test.9.3 Immediately after the completion of mixing,measurethe temperature of the grout.Then introduce the grout into a1000-mL graduated cylinder until the volume of the specimenis 800 6 10 mL.Record the volume of the specimen and thetime at which the reading was made.Place the graduatedcylinder on a level surface free of vibration.Cover to preventevaporation of the bleed water.9.4 Take and record the readings,estimated to the nearest 1mL,of the upper surfaces of the grout and bleed water,if any,of the specimen in the graduate at 15-min intervals