ASTM_D_3282_-_15.pdf

Designation:D328215Standard Practice forClassification of Soils and Soil-Aggregate Mixtures forHighway Construction Purposes1This standard is issued under the fixed designation D3282;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This practice covers a procedure for classifying mineraland organomineral soils into seven groups based on laboratorydetermination of particle-size distribution,liquid limit,andplasticity index.It may be used when a precise engineeringclassification is required,especially for highway constructionpurposes.Evaluation of soils within each group is made bymeans of a group index,which is a value calculated from anempirical formula.NOTE1The group classification,including the group index,should beuseful in determining the relative quality of the soil material for use inearthwork structures,particularly embankments,subgrades,subbases,andbases.However,for the detailed design of important structures,additionaldata concerning strength or performance characteristics of the soil underfield conditions will usually be required.1.2 UnitsThe sieve designations are identified using the“standard”system in accordance with Specification E11,suchas 75-mm and 75-m,followed by the“alternative”system of3-in.and No.200,respectively.1.3This 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.1.4 This practice offers a set of instructions for performingone or more specific operations.This practice cannot replaceeducation or experience and should be used in conjunctionwith professional judgment.Not all aspects of this practice maybe applicable in all circumstances.This practice is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this practice be applied without consideration of aprojects many unique aspects.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.2.Referenced Documents2.1 ASTM Standards:2D421 Practice for Dry Preparation of Soil Samples forParticle-Size Analysis and Determination of Soil Con-stantsD422 Test Method for Particle-Size Analysis of SoilsD653 Terminology Relating to Soil,Rock,and ContainedFluidsD1140 Test Methods for Determining the Amount of Mate-rial Finer than 75-m(No.200)Sieve in Soils by WashingD1452 Practice for Soil Exploration and Sampling by AugerBoringsD1586 Test Method for Penetration Test(SPT)and Split-Barrel Sampling of SoilsD1587 Practice for Thin-Walled Tube Sampling of Soils forGeotechnical PurposesD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD4700 Guide for Soil Sampling from the Vadose ZoneD6913 Test Methods for Particle-Size Distribution(Grada-tion)of Soils Using Sieve AnalysisE11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 AASHTO Document:3M 145 The Classification of Soils and Soil Aggregate Mix-tures for Highway Construction Purposes3.Terminology3.1 Definitions of Terms Specific to This Standard:1Thispractice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.07 on Identification andClassification of Soils.Current edition approved Nov.1,2015.Published December 2015.Originallyapproved in 1973.Last previous edition approved in 2009 as D3282 09.DOI:10.1520/D3282-15.2For 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.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.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 States1 3.1.1 The following terms are frequently used in this prac-tice.These terms differ slightly from those given in Terminol-ogy D653,but are used here to maintain consistency withcommon highway usage.3.1.2 bouldersparticles of rock with a minimum dimen-sion of 305-mm(12-in.)or more.3.1.3 cobblesparticles of rock with a minimum dimensionof less than 305-mm(12-in.)and