ASTM_C_943_-_10.pdf

Designation:C94310Standard Practice forMaking Test Cylinders and Prisms for Determining Strengthand Density of Preplaced-Aggregate Concrete in theLaboratory1This standard is issued under the fixed designation C943;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 covers procedures for making standard testcylinders used to determine the compressive strength anddensity of preplaced-aggregate(PA)concrete.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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-gregatesC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC219 Terminology Relating to Hydraulic CementC637 Specification for Aggregates for Radiation-ShieldingConcreteC937 Specification for Grout Fluidifier for Preplaced-Aggregate ConcreteC938 Practice for Proportioning Grout Mixtures forPreplaced-Aggregate ConcreteC939 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 theLaboratory3.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 Coarse aggregate is placed in a standard cylinder moldhaving end plates to which pipe fittings have been attached.Grout is pumped into the mold until full.The test cylinder,demolded after hardening,may be cured and used for deter-mination of strength or cut into prisms for the determination ofunit weight.5.Significance and Use5.1 This practice is used for making test cylinders or prismsof PA concrete.Cylinders are used for determining compres-sive strength and approximate density.Prisms,cut fromcylinders,eliminate the surface effect and thus more accuratelyrepresent the actual density of PA concrete in place.6.Apparatus6.1 Cylinder Molds(Fig.1),cast iron or steel,for making150 by 300-mm(6 by 12-in.)cylinders.Base and top platesshall be arranged for tight assembly to the cylinder.All matingand inside surfaces shall be machined smooth such that theassembled mold will be essentially watertight.End plates shallbe drilled and tapped at their centers for standard 19 mm(34-in.)pipe nipples.The top end plate shall also be perforated,as shown in Fig.2.6.2 Venting Fabric,white cotton cloth,free of oil andgrease.6.3 Grouting Apparatus(Fig.3),capable of delivering groutat a uniform rate of 1.4 to 2.8 L(0.05 to 0.10 ft3)/min atpressures up to 345 kPa(50 psi).6.4 Mallet,with rubber or rawhide head weighing approxi-mately14kg(12lb).6.5 Platform Scales,accurate to within 0.3%of the test loadat any point within the range of use.6.6 Stop Watch,least reading not more than 0.2 s.1This 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 June 15,2010.Published July 2010.Originallyapproved in 1980.Last previous edition approved in 2002 as C943 02.DOI:10.1520/C0943-10.2For 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 6.7 Flow ConeSee Test Method C939.6.8 Thermometer,accurate to 0.5C(1F),for measuringambient and grout temperatures.7.Materials7.1 Coarse AggregateExcept when tests are made forspecific projects,coarse aggregate shall conform to the require-ments of Specification C637,Table number 2,CoarseAggregate,Grading 1,unless Grading 2 is specified.7.2 GroutExcept when tests are made for specificprojects,grout ingredients,proportioning,and mixing shall bein accordance with Practice C938.7.3 Tests for Specific ProjectsWhen tests are to be madefor specific projects,materials shall be representative of thosein use or proposed for use in the work.7.3.1 If not taken from project-mixed grout being used inthe work,grout materials shall be mixed in the laboratory usingthe procedure described in Specification C937.8.Sampling8.1 Coarse aggregate shall be representative of materialused or to be used in the w