ASTM_C_1749_-_17a.pdf

Designation:C174917aStandard Guide forMeasurement of the Rheological Properties of HydraulicCementious Paste Using a Rotational Rheometer1This standard is issued under the fixed designation C1749;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 guide covers description of several methods tomeasure the rheological properties of fresh hydraulic cementpaste.All methods are designed to determine the yield stressand plastic viscosity of the material using commerciallyavailable instruments and the Bingham model.Knowledge ofthese properties gives useful information on performance ofcement pastes in 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 guide offers an organized collection of informationor a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standard of care by which the adequacy ofa given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.The word“Standard”in the title of thisdocument means only that the document has been approvedthrough the ASTM consensus process.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.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC1738 Practice for High-Shear Mixing of Hydraulic CementPastesE2975 Test Method for Calibration or Calibration Verifica-tion of Concentric Cylinder Rotational Viscometers2.2 Other Standards:API Recommended Practice 10B Testing Well Cements,American Petroleum Institute,Washington,DC(1997)ISO 10426-2(2003)Petroleum and Natural Gas IndustriesCements and Materials for Well CementingPart 2:Testing of Well CementsSection 5.23.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology C125 and C219.3.2 Definitions of Terms Specific to This Standard:3,43.2.1 apparent viscosity,nthe shear stress divided by rateof shear,in units of Pa.s.3.2.2 plastic viscosity,nin the plastic(Bingham)model,the slope of the shear stress shear rate curve,in units of Pa.s.3.2.3 thixotropy,na decrease of the apparent viscosityunder constant shear stress or shear rate followed by a gradualrecovery when the stress or shear rate is removed.3.2.4 yield stress,nthe stress corresponding to the transi-tion from elastic to plastic deformation,in units of Pa;it is alsoreferred to as the stress needed to initiate flow.It would becalculated using the Bingham model in this guide.1This guide is under the jurisdiction of ASTM Committee C01 on Cement andis the direct responsibility of Subcommittee C01.22 on Workability.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 2012.Last previous edition approved in 2017 as C1749 17.DOI:10.1520/C1749-17A.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.3H.A.Barnes,J.F.Hutton and K.Walters,An Introduction to Rheology,Elsevier(1989).4Hackley V.A.,Ferraris C.F.,“The Use of Nomenclature in Dispersion Scienceand Technology”NIST Recommended Practice Guide,SP 960-3,2001.*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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.2.5 Bingham model,na