1、Designation:D776512Standard Practice forUse of Foundry Sand in Structural Fill and Embankments1This standard is issued under the fixed designation D7765;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numb
2、er in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers methods to use foundry sand asembankment and structural fill.1.2 It includes recommended construction(Section 5),com-pacti
3、on control(Section 6),and freeze-thaw durability(Section7)practices.1.3 The engineer should be aware that foundry sand is aby-product of metal casting industries.Various state,county,and local environmental laws and regulations may apply iffoundry sand is used as an alternative embankment or fillmat
4、erial.It is advised that foundry sand users contact state,county,and local environmental regulators to determine whatrequirements or limitations may exist.1.4 This standard applies to both green foundry sand andchemically bonded foundry sand.1.5 The values stated in SI units are to be regarded assta
5、ndard.No other units of measurement are included in thisstandard.1.6 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
6、-bility of regulatory limitations prior to use.1.7 This guide offers an organized collection of informationor a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all
7、aspects of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standard of care by which the adequacy ofa given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.T
8、he word“Standard”in the title of thisdocument means only that the document has been approvedthrough the ASTM consensus process.2.Referenced Documents2.1 ASTM Standards:2C837 Test Method for Methylene Blue Index of ClayD653 Terminology Relating to Soil,Rock,and ContainedFluidsD698 Test Methods for La
9、boratory Compaction Character-istics of Soil Using Standard Effort(12 400 ft-lbf/ft3(600kN-m/m3)D1556 Test Method for Density and Unit Weight of Soil inPlace by Sand-Cone MethodD1557 Test Methods for Laboratory Compaction Character-istics of Soil Using Modified Effort(56,000 ft-lbf/ft3(2,700 kN-m/m3
10、)D1883 Test Method for CBR(California Bearing Ratio)ofLaboratory-Compacted SoilsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2974 Test Methods for Moisture,Ash,and Organic Matterof Peat and Other Organic SoilsD4327 Test Method for Anions in Water
11、 by Suppressed IonChromatographyD5080 Test Method for Rapid Determination of PercentCompactionD5918 Test Methods for Frost Heave and Thaw WeakeningSusceptibility of SoilsD6026 Practice for Using Significant Digits in GeotechnicalDataD6938 Test Method for In-Place Density and Water Contentof Soil and
12、 Soil-Aggregate by Nuclear Methods(ShallowDepth)G51 Test Method for Measuring pH of Soil for Use inCorrosion TestingG187 Test Method for Measurement of Soil ResistivityUsing the Two-Electrode Soil Box Method3.Terminology3.1 For definitions related to geotechnical properties,seeTerminology D653.1This
13、 practice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.14 on Geotechnics ofSustainable Construction.Current edition approved June 1,2012.Published August 2012.DOI:10.1520/D7765-12.2For referenced ASTM standards,visit the ASTM we
14、bsite,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 3.2
15、Definitions of Terms Specific to This Standard:3.2.1 active clay content,nthe clay fraction that still canbe hydrated.3.2.2 binders,nadditives used to hold the sand in therequired shape during the casting process.Binders may beinorganic,such as bentonite clay and sodium silicate,ororganic such as ph
16、enolic-urethanes and epoxy-resins.3.2.3 chemically bonded sand,nfoundry sand that con-tains non-bentonite binders.3.2.4 foundry sand,na narrowly graded fine sand withsubangular to rounded grains that is a by-product of the steeland aluminum casting industry.3.2.5 green foundry sand,na mixture of foundry sand,bentonite and seacoal.Most of foundry sand generated is greenfoundry sand that contains bentonite clay and carbonaceousadditives,such as seacoal.Bentonite content of the greenfoundry sands i
