1、Designation:D241914Standard Test Method forSand Equivalent Value of Soils and Fine Aggregate1This standard is issued under the fixed designation D2419;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method is intended to serve as a rapid field-corre
3、lation test.The purpose of this test method is to indicate,under standard conditions,the relative proportions of clay-sizeor plastic fines and dust in granular soils and fine aggregatesthat pass the 4.75-mm(No.4)sieve.The term“sand equiva-lent”expresses the concept that most granular soils and somef
4、ine aggregates are mixtures of desirable coarse particles,sand-size particles,and generally undesirable clay or plasticfines and dust.NOTE1For fine aggregates containing clean dust of fracture(clay-sizeparticles that are not clay minerals),test results will depend on the amountof fines present in th
5、e material.In this case other tests such as MethyleneBlue Value(AASHTO T330)or X-Ray Diffraction(XRD)may be neededto determine if the fines are deleterious.NOTE2Some agencies perform the test on material with a top sizesmaller than the 4.75-mm(No.4)sieve.This is done to avoid trapping theclay-size o
6、r plastic fines and dust below flaky shaped 4.75 to 2.36 mm(No.4 to 8)sized particles.Testing smaller top sized material may lowerthe numerical results of the test.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to S
7、I units that are provided for information onlyand are not considered standard.1.2.1 Regarding sieves,per Specification E11 Section 1.2,“the values stated in SI units shall be considered standard forthe dimensions of the wire cloth openings and the diameter ofthe wires used in the wire cloth.The valu
8、es stated in inchpoundunits shall be considered standard with regard to the sieveframes.”When sieve mesh sizes are referenced,the alternateinch-pound designations are provided for information purposesand enclosed in parentheses.1.3 This standard does not purport to address all of thesafety concerns,
9、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.2.Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias S
10、tatementsfor Test Methods for Construction MaterialsC702 Practice for Reducing Samples ofAggregate to TestingSizeD8 Terminology Relating to Materials for Roads and Pave-mentsD75 Practice for Sampling AggregatesD653 Terminology Relating to Soil,Rock,and ContainedFluidsD3666 Specification for Minimum
11、Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 AASHTO Standard:T 176 Standard Method of Test for Plastic Fines in GradedAggregates and Soils by Use of Sand Equivalent Test33.Terminology3.1 Definitions:3.1
12、.1 clay sizethat portion of the soil or aggregate finerthan 0.002 mm(0.005 mm in some cases)(see TerminologyD653).3.1.2 fine aggregateaggregate passing the 9.5-mm(38-in.)sieve and almost entirely passing the 4.75-mm(No.4)sieveand predominantly retained on the 75-m(No.200)sieve(seeTerminology D8).3.1
13、.3 sandparticles of rock that will pass the 4.75 mm(No.4)sieve and be retained on the 0.075 mm(No.200)sieve(see Terminology D653).3.1.4 sand equivalenta measure of the amount of silt,claycontamination,or clay-size aggregate particles in the fineaggregate(or soil)as determined by test(see Terminology
14、D653).(For further explanation,see Section 4 and Section 5.)1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate Tests.Current edition approved June 1,2014.Published September 2014.Originally
15、approved in 1965.Last previous edition approved in 2009 as D2419 09.DOI:10.1520/D2419-14.2For 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 p
16、age 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.5 soilsediments or other unconsolidated accumula-tions of solid particles produced by the physical and chemicaldisintegration of rocks which may or may not contain organicmatter(see Terminology
