ASTM_C_938_-_16.pdf

Designation:C93816Standard Practice forProportioning Grout Mixtures for Preplaced-AggregateConcrete1This standard is issued under the fixed designation C938;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 practice describes the laboratory procedure forselecting proportions for grout mixtures required in the pro-duction of preplaced-aggregate(PA)concrete.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-gregatesC150/C150M Specification for Portland CementC185 Test Method for Air Content of Hydraulic CementMortarC219 Terminology Relating to Hydraulic CementC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC637 Specification for Aggregates for Radiation-ShieldingConcreteC937 Specification for Grout Fluidifier for Preplaced-Aggregate ConcreteC939/C939M Test Method for Flow of Grout for Preplaced-Aggregate Concrete(Flow Cone Method)C940 Test Method for Expansion and Bleeding of FreshlyMixed Grouts for Preplaced-Aggregate Concrete in theLaboratoryC941 Test Method for Water Retentivity of Grout Mixturesfor Preplaced-Aggregate Concrete in the LaboratoryC942 Test Method for Compressive Strength of Grouts forPreplaced-Aggregate Concrete in the LaboratoryC943 Practice for Making Test Cylinders and Prisms forDeterminingStrengthandDensityofPreplaced-Aggregate Concrete in the Laboratory3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminologies C125 and C219.4.Summary of Practice4.1 Grouts at fluid consistency are prepared from one ormore mixtures of cement,pozzolan,fine aggregate,groutfluidifier,with or without other chemical admixtures,andwater,and tested to determine:4.1.1 The properties of the grout,and4.1.2 The properties of PA concrete made with the groutwhen the grout is intended for such use.4.2 The procedure and equipment required for mixing thisgrout are prescribed in this practice.5.Significance and Use5.1 This practice provides a standard procedure for selectingproportions for mixtures of grout to be used at fluid consistencyin the production of PAconcrete meeting applicable criteria forstrength,density,and other properties.5.2 This practice is also useful for determining the compo-sition of grout mixed at fluid consistency and meeting specifiedrequirements for filling voids,cavities,and spaces in rock,foundations,and concrete structures.6.Apparatus6.1 Mixer,constructed as shown in Fig.1.The three mixerblades shall be made of steel plate,3-mm thick,with a 100-by125-mm elliptical shape.Each blade shall have two 25-by75-mm slots centered on the major axis,and shall be welded tothe shaft at an angle of approximately 23 with the horizontalin such a way as to force grout to the bottom of the mixer1This practice is under the jurisdiction of ASTM Committee C09 on Concreteand Concrete Aggregates and is the direct responsibility of Subcommittee C09.41on Hydraulic Cement Grouts.Current edition approved Feb.1,2016.Published March 2016.Originallyapproved in 1982.Last previous edition approved in 2010 as C93810.DOI:10.1520/C0938-16.2For 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.*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 during rotation.The mixer blades shall be powered to rotate atapproximately 275 r/min under load.6.2 Scales or Balance,accurate to within 0.3%of the testmass at any point within range of use.6.3 Jaw Caliper,capable of measuring up to 300 mm with aresolution of at least 0.1 mm.7.Materials7.1 Materials for test purposes,except mixing water,shallmeet the following requirements unless otherwise specified inproject documents:7.1.1 Portland cement,Specification C150/C150M,nonair-entraining,7.1.2 Pozzolan,if used,Specification C618,7.1.3 Fluidifier,Specification C937,and7.1.4 Fine aggregate,Specification C637,Table number 2,Grading 1 for relative density under 3.0 and Grading 2 forspecific activity 3.0 or heavier.7.2 Where grout is being proportioned for use on a specificproject,materials for test purposes shall be