ASTM_D_6276_-_19.pdf

Designation:D627619Standard Test Method forUsing pH to Estimate the Soil-Lime Proportion Requirementfor Soil Stabilization1This standard is issued under the fixed designation D6276;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 test method provides a means for estimating thesoil-lime proportion requirement for stabilization of a soil.Thistest method is performed on soil passing the 425m(No.40)sieve.The optimum soil-lime proportion for soil stabilization isdetermined by tests of specific characteristics of stabilized soilsuch as unconfined compressive strength or plasticity index.1.2 Some highly alkaline by-products(lime kiln dust,ce-ment kiln dust,carbide lime,and so forth)have been success-fully used to stabilize soil.This test method is not intended forthese materials and any such product would need to be testedfor specific characteristics as indicated in 1.1.1.3 This test method is used to determine the percentage oflime that results in a soil-lime pH of approximately 12.4.NOTE1Under ideal laboratory conditions of 25C and sea levelelevation,the pH of the lime-soil-water solution should be 12.4.1.4 Lime is not an effective stabilizing agent for all soils.Some soil components such as sulfates,phosphates,organics,and iron can adversely affect soil-lime reactions and mayproduce erroneous results using this test method.1.5 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.6 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.6.1 The procedures used to specify how data are collected/recorded and calculated in the 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 reported data to becommensurate with these considerations.It is beyond the scopeof these test methods to consider significant digits used inanalysis for engineering data.1.7 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.1.8 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:2C977 Specification for Quicklime and Hydrated Lime forSoil StabilizationD421 Practice for Dry Preparation of Soil Samples forParticle-Size Analysis and Determination of Soil Con-stants(Withdrawn 2016)3D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1193 Specification for Reagent WaterD1293 Test Methods for pH of WaterD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD3740 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 Testing1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.15 on Stabilization WithAdmixtures.Current edition approved Feb.1,2019.Published February 2019.Originallyapproved in 1998.Last previous edition approved in 2006 as D6276 99a(2006),which was withdrawn July 2015 and reinstated in February 2019.DOI:10.1520/D6276-19.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.*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 th