ASTM_C_1753_-_C_1753M_-_15e1.pdf

Designation:C1753/C1753M151Standard Practice forEvaluating Early Hydration of Hydraulic CementitiousMixtures Using Thermal Measurements1This standard is issued under the fixed designation C1753/C1753M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEThe designation was corrected editorially in June 2016 to conform with the units statement(1.3).1.Scope1.1 This practice describes the apparatus and procedure forevaluating relative differences in early hydration of hydrauliccementitious mixtures such as paste,mortar,or concrete,including those containing chemical admixtures,varioussupplementary cementitious materials(SCMs),and other finelydivided materials,by measuring the temperature history of aspecimen.1.2 Calorimetry is the measurement of heat lost or gainedduring a chemical reaction such as cement hydration;calori-metric measurements as a function of time can be used todescribe and evaluate hydration and related early-age propertydevelopment.Calorimetry may be performed under isothermalconditions(as described in Practice C1679)or under adiabaticor semi-adiabatic conditions.This practice cannot be describedas calorimetry because no attempt is made to measure orcompute the heat evolved from test specimens due tohydration,but it can in many cases be used for similarevaluations.Variables that should be considered in the appli-cation of this practice are discussed in the Appendix.1.3 UnitsThe values stated in either SI units or inch-pound units shall be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system must be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.Some values have only SI unitsbecause the inch-pound equivalents are not used in practice.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.NOTE1Warning:Fresh hydraulic cementitious mixtures are causticand may cause chemical burns to skin and tissue upon prolongedexposure.22.Referenced Documents2.1 ASTM Standards:3C39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC125 Terminology Relating to Concrete and Concrete Ag-gregatesC172/C172M Practice for Sampling Freshly Mixed Con-creteC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC219 Terminology Relating to Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC403/C403M Test Method for Time of Setting of ConcreteMixtures by Penetration ResistanceC494/C494M Specification for Chemical Admixtures forConcreteC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC1679 Practice for Measuring Hydration Kinetics of Hy-draulic Cementitious Mixtures Using Isothermal Calorim-etry3.Terminology3.1 DefinitionsFor definitions of terms used in thispractice,refer to Terminology C125,Terminology C219,andPractice C1679.3.2 Definitions of Terms Specific to This Standard:3.2.1 adiabatic,adjoccurring without exchange of heatwith the environment.1This practice is under the jurisdiction of ASTM Committee C09 on Concreteand ConcreteAggregates and is the direct responsibility of Subcommittee C09.48 onPerformance of Cementitious Materials and Admixture Combinations.Current edition approved Aug.1,2015.Published September 2015.DOI:10.1520/C1753_C1753M-15E01.2Section 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.2 exotherm,nheat evolution during hydration as evi-denced by an increase in measured specimen temperatureshown in the thermal profile.3.2.3 inert specimen,nspecimen placed within the samethermal environment as the test specimen(s),made of anonreactive material of similar heat capacity and the samemass as the reacting test specimen(s).3.2.3.1 DiscussionThe difference between the tempera-ture of the hydrating test specimen(s)and the inert specimenrepresents the change in specimen temperature due to hydra-tion.Interpretation can often be improved by comparingtemperature histories after subtracting the temperature of thecorresponding i