ASTM_D_7626_-_19e1.pdf

Designation:D7626191Standard Test Methods forDetermining the Organic Treat Loading of OrganophilicClay1This standard is issued under the fixed designation D7626;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.1NOTECorrected data sheet editorially in Appendix X1 in February 2020.1.Scope1.1 This standard covers two index test methods that can beused in the evaluation of the amount of organic compoundchemically bonded to the base clay portion of a representativesample of organophilic clay.1.2 The values stated in SI units are to be regarded as thestandard.No other units of measurement are included in thisstandard.Reporting of test results in units other than SI shallnot be regarded as nonconformance with this standard.NOTE1This standard is presented using SI units.Use of units otherthan SI is allowed.However,if other units are used,the performance of aunits conversion check of the calculations should be included as a part ofthe calculations.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.3.1 Two test methods are provided in this standard.Themethods differ in equipment,the size of the specimen(mass)required and the significant digits reported.1.3.2 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of the reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analysismethods for engineering design.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,health,and environmental practices and deter-mine the applicability 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:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalDataE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 DefinitionsFor definitions of common technical termsin this standard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 base clay,nan untreated naturally occurring clay(for example,bentonite,kaolinite).3.2.2 initial mass loss,nthe amount of water and residualorganic compound not bound to the base clay.1These test methods are under the jurisdiction ofASTM Committee D18 on Soiland Rock and are the direct responsibility of Subcommittee D18.21 on Groundwaterand Vadose Zone Investigations.Current edition approved Feb.1,2019.Published February 2019.Originallyapproved in 2010.Last previous edition approved in 2018 as D762610(2018).DOI:10.1520/D7626-19E01.2For 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 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.3.2.3 organic treat loading,nthe amount of organic com-pound chemically bonded to the base clay portion of anorganophilic clay.3.2.4 organophilic,adjhaving a strong affinity for oil andother insoluble organic compounds.3.2.5 organophilic clay,na manufactured material con-sisting of base clay to which an organ