ASTM_D_7552_-_09_2014.pdf

Designation:D755209(Reapproved 2014)Standard Test Method forDetermining the Complex Shear Modulus(G*)OfBituminous Mixtures Using Dynamic Shear Rheometer1This standard is issued under the fixed designation D7552;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.Scope1.1 This test method covers the determination of the com-plex shear modulus of bituminous mixtures using torsionrectangular geometry on a dynamic shear rheometer(DSR).Itis applicable to bituminous mixtures having complex shearmodulus values greater than 1 104Pa when tested over arange of temperatures from 10C to 76C at frequencies of 0.01to 25 Hz and strains of 0.001%to 0.1%.The determination ofcomplex shear modulus is typically determined at 20C to70C at 0.01%strain at 10 discrete frequency values covering0.01 to 10 Hz.From these data,temperature or frequencymaster curves can be generated as required.This test method isintended for determining the complex shear modulus of bitu-minous mixtures as required for specification testing or qualitycontrol of bituminous mixture production.1.2 This test method is appropriate for laboratory preparedand compacted mixtures,field produced and laboratory com-pacted mixtures or field cores,regardless of binder type orgrade and regardless of whether RAP is used in the mixture.Due to the geometry of the specimens being tested this testmethod is not applicable to open-graded or SMA mixtures.Ithas been found to be appropriate for dense-graded mixtures,whether coarse-or fine-graded,with 19 mm or smaller nominalmaximum aggregate size.1.3 The between-laboratory reproducibility of this testmethod is being determined and will be available on or beforeJune 2012.Therefore,this test method should not be used foracceptance or rejection of materials for purchasing purposes.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 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:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD140 Practice for Sampling Bituminous MaterialsD2041 Test Method for Theoretical Maximum SpecificGravity and Density of Bituminous Paving MixturesD2726 Test Method for Bulk Specific Gravity and Densityof Non-Absorptive Compacted Bituminous MixturesD3203 Test Method for Percent Air Voids in CompactedDense and Open Bituminous Paving MixturesD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6752 Test Method for Bulk Specific Gravity and Densityof Compacted Bituminous Mixtures Using AutomaticVacuum Sealing MethodD6857 Test Method for Maximum Specific Gravity andDensity of Bituminous Paving Mixtures Using AutomaticVacuum Sealing MethodD6925 Test Method for Preparation and Determination ofthe Relative Density of Asphalt Mix Specimens by Meansof the Superpave Gyratory CompactorD6926 Practice for Preparation of Bituminous SpecimensUsing Marshall ApparatusD7175 Test Method for Determining the Rheological Prop-erties of Asphalt Binder Using a Dynamic Shear Rheom-eterD7312 Test Method for Determining the Permanent ShearStrain and Complex Shear Modulus of Asphalt MixturesUsing the Superpave Shear Tester(SST)E77 Test Method for Inspection and Verification of Ther-mometersE563 Practice for Preparation and Use of an Ice-Point Bathas a Reference Temperature1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.26 onFundamental/Mechanistic Tests.Current edition approved Aug.1,2014.Published November 2014.Originallyapproved in 2009.Last previous edition approved in 2009 as D7552 09.DOI:10.1520/D7552-09R14.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 E644 Test Methods for Testing Industrial Resistance Ther-mometers2.2 Other Standards:DIN Standard 43760 Standard for Calibration of PlatinumResistance Thermometers33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 asphalt binder,nan asphalt-based cement that isproduced from petroleum residue either with or without theaddition of non-particulate modifiers.3.1.2 calibration,na process that esta