1、Designation:D523912Standard Practice forCharacterizing Fly Ash for Use in Soil Stabilization1This standard is issued under the fixed designation D5239;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 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 practice covers procedures for characterizing flyash to be used in soil stabilization.This practice lists represen-tative test methods for
3、determining the chemical,physical,andcementitious properties of fly ash.A broad guideline is pro-vided in Appendix X1 that explains the significance of theseproperties in soil stabilization.1.2 All observed and calculated values shall conform to theguidelines for significant digits and rounding esta
4、blished inPractice D6026.1.2.1 The method used to specify how data are collected,calculated,or recorded in this standard is not directly related tothe accuracy to which the data can be applied in design or otheruses,or both.How one applies the results obtained using thisstandard is beyond its scope.
5、1.3 The values stated in SI units are to be regarded as thestandard.The inch-pound equivalents are shown for informa-tion only.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 appr
6、o-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.1.5 This practice offers a set of instructions for performingone or more specific operations.This document cannot replaceeducation or experience and should be used in conjunctionwith profess
7、ional judgment.Not all aspects of this practice maybe applicable in all circumstances.This ASTM standard is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without consideration ofa proje
8、cts many unique aspects.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.1.6 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables a
9、nd figures)shall not be consideredas requirements of the standard.2.Referenced Documents2.1 ASTM Standards:2C25 Test Methods for Chemical Analysis of Limestone,Quicklime,and Hydrated LimeC109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C191
10、 Test Methods for Time of Setting of Hydraulic Cementby Vicat NeedleC265 Test Method for Water-Extractable Sulfate in HydratedHydraulic Cement MortarC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC311 Test Methods for Sampling and Testing Fly Ash orNa
11、tural Pozzolans for Use in Portland-Cement ConcreteC593 Specification for Fly Ash and Other Pozzolans for UseWith Lime for Soil StabilizationC821 Specification for Lime for Use with PozzolansD653 Terminology Relating to Soil,Rock,and ContainedFluidsD1293 Test Methods for pH of WaterD3740 Practice fo
12、r Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD5370 Specification for Pozzolanic Blended Materials inConstruction ApplicationsD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 Defini
13、tions:3.1.1 For common definitions of terms in this standard,referto Terminology D653.3.2 Definitions of Terms Specific to This Standard:1This practice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.15 on Stabilization WithAdmixtu
14、res.Current edition approved July 1,2012.Published September 2012.Originallyapproved in 1992.Last previous edition approved in 2004 as D5239 04.DOI:10.1520/D5239-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book o
15、f ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*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 3.2.1 non self-cementing f
16、ly ash,nfly ash produced fromthe combustion of pulverized or crushed coal.This fly ash haspozzolanic properties and no self-cementing properties.3.2.2 self-cementing fly ash,nfly ash produced from thecombustion of pulverized or crushed coal.This fly ash,inaddition to having pozzolanic properties,sets and hardens bychemical interaction with water and is capable of doing sounder water.3.2.3 stabilizing admixtures,nadmixtures used to improvesoil properties such as increased soil freeze-thaw durabil
