文档介绍：Designation:D2487-00
StandardPracticefor
ClassificationofSoilsforEngineeringPurposes(UnifiedSoilClassificationSystem)1该操作都能用于所有的环境。该
ASTM标准不是想代表或是取代标准观察，对于一给定的专业，必须判断其适当性，也不是不考虑一个工程的许多的特殊方面就采用该文件。在标题中“标
准”一词仅仅意味着文件已经通过了ASTM多数人赞同通过程序的批准。
.参考文件
2.]ASTMStandards:
C117TestMethodforMaterialsFinerThan75-pm(No.
SieveinMineralAggregatesbyWashing3
C136TestMethodforSieveAnalystsofFineandCoarseAggregates3
C702PracticeforReducingFieldSamplesofAggregateto
TestingSize3
D420GuidetoSiteCharacterizationforEngineering,De*
signandConstructionPurposes
D42]PracticeforDryPreparationofSoilSamplesforParticle-SizeAnalysisandDeterminationofSoilCon-slants4
口422TestMethodforParticle-SizeAnalysisofSoils4
D653TerminologyRelatingtoSoil,Rock,andContainedFluids4
D1140iiestMethodforAmountofMaterialinSoilsFiner
(75-pm)Sieve4
D2216TestMethodforLaboratoryDcterminationofWater
(Moisture)ContentofSoilandRock4
D2217PracikcforWetPreparationofSoilSamplesforParticle-SizeAnalysisandDeterminationofSoilConstants4
D24KKPraciiccforDescriptionandIdentificatkuiofSoils(Visual-ManualProcedure)4
D3740PracticeforMinjmtiTriRequirementsforAgencies
Engagedin(heIcsJingand/orInspectionofSoilandRock
asUsedinEngineeringDesignandConstruction5
D4083PracticefbrDescriptionofFrozenSoils(Visual
ManualProcedure)4
D4318TestMethodfbrLiquidLimitPlasticLimit,and
PlasticityIndexofSoils4
D4427ClassificationofPeatSamplesbyLaboratoryTest-4mg
E11SpecificationforWire-ClothSievesforTestingPur*poses6

定义-除非以下列出的，所有定义均参照术语D653
Nmr4ForparticlesretainedonaVin.(7S-mm)
thefollowingdcfinitnwisurc&ug屿水d:
Cobbles'-particlesof«>ckthjlwillpassa12-in.(jOO-mm)square
openingandbereLaiticdona3-in.(75-tnni),sundard&i£vc,and
Boukierx-paniclesofrock命川willnotpassa12'in.(300-rtim)squareopening.
粘土-(75-mm)美国标准筛的土，能被制成在一定范围的含水率存在塑性(像灰泥样的性质)，当空干时存在相当的强度。对于分类，粘土是细颗粒土，或者土中的细粒部分，其塑性指数等于或大于4,在塑性指数对液
限的曲线上落在或在“A”线以上。
砾石-岩石粒子通过美国标准筛3-in.(75-mm)筛，(-mm)筛上部分，按以下细分：
粗砾-通过3-in.(