【英文标准名称】:StandardTestMethodsforLaboratoryCompactionCharacteristicsofSoilUsingModifiedEffort(56,000ft-lbf/ft3(2,700kN-m/m3))
【原文标准名称】:用修正作用力56000ft-Ibf/ft(2700KN-m/m3)测量土壤实验室压实特性的标准试验方法
【标准号】:ASTMD1557-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compactioncharacteristics;density;impactcompactionusingmodifiedeffort;laboratorytests;modifiedproctortest;moisture-densitycurves;soilcompaction;Compactionmeasurement--soils;Density--soil/rock/relatedmaterials;Dryunitweight;Ear
【摘要】:Soilplacedasengineeringfill(embankments,foundationpads,roadbases)iscompactedtoadensestatetoobtainsatisfactoryengineeringpropertiessuchasshearstrength,compressibility,orpermeability.Inaddition,foundationsoilsareoftencompactedtoimprovetheirengineeringproperties.Laboratorycompactiontestsprovidethebasisfordeterminingthepercentcompactionandmoldingwatercontentneededtoachievetherequiredengineeringproperties,andforcontrollingconstructiontoassurethattherequiredcompactionandwatercontentsareachieved.Note38212;Thedegreeofsoilcompactionrequiredtoachievethedesiredengineeringpropertiesisoftenspecifiedasapercentageofthemodifiedmaximumdryunitweightasdeterminedusingthistestmethod.Iftherequireddegreeofcompactionissubstantiallylessthanthemodifiedmaximumdryunitweightusingthistestmethod,itmaybepracticablefortestingtobeperformedusingTestMethodD698andtospecifythedegreeofcompactionasapercentageofthestandardmaximumdryunitweight.Sincemoreenergyisappliedforcompactionusingthistestmethod,thesoilparticlesaremorecloselypackedthanwhenD698isused.Thegeneraloverallresultisahighermaximumdryunitweight,loweroptimummoisturecontent,greatershearstrength,greaterstiffness,lowercompressibility,lowerairvoids,anddecreasedpermeability.However,forhighlycompactedfine-grainedsoils,absorptionofwatermayresultinswelling,withreducedshearstrengthandincreasedcompressibility,reducingthebenefitsoftheincreasedeffortusedforcompaction(2).UseofD698,ontheotherhand,allowscompactionusinglesseffortandgenerallyatahigheroptimummoisturecontent.Thecompactedsoilmaybelessbrittle,moreflexible,morepermeable,andlesssubjecttoeffectsofswellingandshrinking.Inmanyapplications,buildingorconstructioncodesmaydirectwhichtestmethod,D698orthisone,shouldbeusedwhenspecifyingthecomparisonoflaboratorytestresultstothedegreeofcompactionofthein-placesoilinthefield.Duringdesignofanengineeredfill,testingperformedtodetermineshear,consolidation,permeability,orotherpropertiesrequirestestspecimenstobepreparedbycompactingthesoilataprescribedmoldingwatercontenttoobtainapredeterminedunitweight.Itiscommonpracticetofirstdeterminetheoptimumwatercontent(wopt)andmaximumdryunitweight(x03B3;dmax)bymeansofacompactiontest.Testspecimensarecompactedataselectedmoldingwatercontent(w),eitherwetordryofoptimum(wopt)oratoptimum(wopt),andataselecteddryunitweightrelatedtoapercentageofmaximumdryunitweight(x03B3;dmax).Theselectionofmoldingwatercontent(w),eitherwetordryofoptimum(wopt)oratoptimum(wopt)andthedryunitweight(x03B3;dmax)maybebasedonpastexperience,orarangeofvaluesmaybeinvestigatedtodeterminethenecessarypercentofcompaction.Experienceindicatesthatthemethodsoutlinedin5.2ortheconstructionc..........
【中国标准分类号】:B11
【国际标准分类号】:93_020
【页数】:14P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 钨精矿化学分析方法 氯代磺酚S光度法测定铌量丁基罗丹明B萃取光度法测定钽量 |
| 英文名称： | Methods for chemical analysis of tungsten concentrates; The chlorosulphophenol S photometric method for the determination niobium content; The butylrhodamine B extraction photometric method for the determinati |
| 中标分类： |
矿业 >>
有色金属矿 >>
放射性金属矿 |
| ICS分类： |
采矿和矿产品 >>
金属矿
|
| 替代情况： | 替代YB 602(12)-1978;被GB/T 6150.7-2008代替 |
| 发布部门： | 中国有色金属工业协会 |
| 发布日期： | 1985-06-21 |
| 实施日期： | 1986-06-01 |
| 首发日期： | 1985-06-21 |
| 作废日期： | 2008-12-01 |
| 主管部门： | 中国有色金属工业协会 |
| 归口单位： | 全国有色金属标准化技术委员会 |
| 起草单位： | 赣州有色冶金研究所 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 1986-06-01 |
| 页数： | 4页 |
适用范围
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前言
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引用标准
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所属分类： 矿业 有色金属矿 放射性金属矿 采矿和矿产品 金属矿