M145用于高速公路中的土和土的混合料的分类(标准规格.doc

M145用于高速公路中的土和土的混合料的分类(标准规格.doc:..StandardSpecificationforClassificationofSoilsandSoil-AggregateMixturesforHighwayConstruct:ionPurposes用扌高速公韓申的土和土的混合料的分类AASHTODesignation:M145-91(2000)(适用范围)mendedpracticedescribesaprocedureforclassifyingsoilsintosevengroupsbasedonlaboratorydeterminationofparticle-sizedistribution(本规范根据试验室测定的数据将土壤的分类分为了7类),liquidlimit(液限),andplasticityindex(塑'性扌旨数)・Evaluationofsoilswithineachgroupismadebymeansofa"gro叩index,"(组指数是评价每组分类的依据)whichisavaluecalculatedfromanempiricalformula(这是一个从经验公式中计算的出来的值).Thegroupclassification,includinggroupindexshouldbeusefulindeterminingtherelativequalityofthesoilmaterialforuseinearthworkstructures,particularlyembankments,subgrades,subbases,andbases(本组的分类包括组指标在确定土壤材料相对质量的土方结构,特别是在路堤、路基、基层和基底的使用是有利J的)・However,forthedetaileddesignofimportantstructuresadditionaldataconcerningstrengthorperformaneecharacteristicsofthesoilunderfieldconditionswillusuallyberequired(然而,对于重要结构物的详细设计,通常是需要在现场条件下测试土壤的强度和性能).・(引用规范)AASHTOStandards:T11,MaterialsFinerThan75-pm()SieveinMineralAggregatesbyWashing水筛法中材料颗粒小于75屮m()筛T27,SieveAnalysisofFineandCoarseAggregates细集料和粗集料的筛分分析T87,DryPreparationofDisturbedSoilandSoilAggregateSamplesforTest干法制备扰动土和混合料土的样品T88,ParticleSizeAnalysisofSoils土壤的颗粒分析T89,DeterminingtheLiquidLimitofSoils土的液限测试T90,DeterminingthePlasticLimitandPlasticityIndexofSoils土的塑限和塑性指数T146,:D1140,(75-pm)(75屮m)多的材料的总数Note1-EitherAASHTOT88orT11andT27,heparticlesizedistributionofsoilsorsoil->Tll>T27或者ASTMD1140将用于确定土壤颗粒中尺寸分部和的土壤或土壤■骨料的混合物作为分类的基础。(分类)TheclassificationismadebyusingthetestlimitsandgroupindexvaluesshowninTable1(分类通过测试和组指示值在表1中查询得到的)・Ifamoredetailedclassificationisdesired,afurthersubdivisionofthegroupssho