ASTM_C_1611_-_C_1611M_-_14.pdf

Designation:C1611/C1611M14Standard Test Method forSlump Flow of Self-Consolidating Concrete1This standard is issued under the fixed designation C1611/C1611M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of slump flowof self-consolidating concrete(SCC).1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.4 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.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2.Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC143/C143M Test Method for Slump of Hydraulic-CementConcreteC172 Practice for Sampling Freshly Mixed ConcreteC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction Materials3.Terminology3.1 For definitions of terms used in this test method,refer toTerminology C125.3.2 Definitions of Terms Specific to This Standard:3.2.1 halo,nan observed cement paste or mortar ring thathas clearly separated from the coarse aggregate,around theoutside circumference of concrete after flowing from the mold.3.2.2 spread,nthe distance of lateral flow of concreteduring the slump-flow test.3.2.3 stability,nthe ability of a concrete mixture to resistsegregation of the paste from the aggregates.3.2.4 viscosity,nresistance of a material to flow under anapplied shearing stress.4.Summary of Test Method4.1 A sample of freshly mixed concrete is placed in a moldeither in the upright or inverted position.The concrete is placedin one lift without tamping or vibration.The mold is raised,andthe concrete is allowed to spread.After spreading ceases,twodiameters of the concrete mass are measured in approximatelyorthogonal directions.Slump flow is the average of the twodiameters.5.Significance and Use5.1 This test method provides a procedure to determine theslump flow of self-consolidating concrete in the laboratory orthe field.5.2 This test method is used to monitor the consistency offresh,unhardened self-consolidating concrete and its uncon-fined flow potential.5.3 It is difficult to produce self-consolidating concrete thatis both flowable and nonsegregating using coarse aggregateslarger than 25 mm 1 in.Therefore,this test method isconsidered applicable to self-consolidating concrete havingcoarse aggregate up to 25 mm 1 in.in size.Appendix X1provides non-mandatory visual rating criteria that may be usedto classify the ability of a self-consolidating concrete mixtureto resist segregation(stability).5.4 The rate at which the concrete spreads is related to itsviscosity.Appendix X1 provides a non-mandatory procedurethat may be used to provide an indication of relative viscosityof self-consolidating concrete mixtures.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.47 on Self-Consolidating Concrete.Current edition approved April 1,2014.Published May 2014.Originallyapproved in 2009.Last previous edition approved in 2009 as C1611/C1611M 09b1.DOI:10.1520/C1611_C1611M-14.2Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.02.3For 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.Apparatus6.1 MoldThe mold used in this test method shall conformto that described in Test Method C143/C143M.6.2 Base PlateAnonabsorbent,smooth,rigid plate havinga minimum diameter of 915 mm 36 in.(See Note 1).NOTE1Field experience and results from the round robin testprogram have shown that