GB/T 19884-2005 声学 各种户外声屏障插入损失的现场测定

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基本信息
标准名称:声学 各种户外声屏障插入损失的现场测定
英文名称:Acoustics—
中标分类: 环境保护 >> 环境保护采样、分析测试方法 >> 噪声、振动测试方法
ICS分类: 计量学和测量、物理现象 >> 声学和声学测量 >> 声学测量和噪声抑制综合
发布部门: 中国科学院
发布日期:2005-09-09
实施日期:2006-04-01
首发日期:2005-09-09
作废日期:1900-01-01
主管部门:中国科学院
提出单位:中国科学院
归口单位:全国声学标准化技术委员会
起草单位:中国科学院声学研究所、北京市劳动保护科学研究所、深圳中雅机电实业有限公
起草人:程明昆、任文堂、方庆川、张荣初、徐欣
出版社:中国标准出版社
出版日期:2006-01-01
页数:16开, 页数:12, 字数:20千字
计划单号:20020656-T-491
书号:155066.1-26897
适用范围

本标准规定了用于屏蔽各种噪声源的户外声屏障插入损失的测量方法。它详细说明了户外声屏障插入损失现场测量的过程,包括传声器位置、声源条件及测量地点的声环境。本标准供人们用来测量给定地点和气象条件下声屏障的插入损失。它不能比较安装在不同地点同样一个声屏障的插入损失值。但它可通过直接法来比较一定气象条件下同一地点不同类型的声屏障之插入损失值。

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所属分类: 环境保护 环境保护采样 分析测试方法 噪声 振动测试方法 计量学和测量 物理现象 声学和声学测量 声学测量和噪声抑制综合
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【英文标准名称】:StandardTestMethodsforCompressiveStrengthofMoldedSoil-CementCylinders
【原文标准名称】:模制土壤水泥圆筒的耐压强度用标准试验方法
【标准号】:ASTMD1633-2000(2007)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D18.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:水泥;化合物;耐压强度;建筑;施工材料;压力;土壤;静压铸件;试验
【英文主题词】:compressivestrength;soil-cement;soilstabilization
【摘要】:MethodAmakesuseofthesamecompactionequipmentandmoldscommonlyavailableinsoillaboratoriesandusedforothersoil-cementtests.ItisconsideredthatMethodAgivesarelativemeasureofstrengthratherthanarigorousdeterminationofcompressivestrength.Becauseofthelesserheighttodiameterratio(1.15)ofthecylinders,thecompressivestrengthdeterminedbyMethodAwillnormallybegreaterthanthatforMethodB.MethodB,becauseofthegreaterheighttodiameterratio(2.00),givesabettermeasureofcompressivestrengthfromatechnicalviewpointsinceitreducescomplexstressconditionsthatmayoccurduringtheshearingofMethodAspecimens.Inpractice,MethodAhasbeenmorecommonlyusedthanMethodB.Asaresult,ithasbeencustomarytoevaluateorspecifycompressivestrengthvaluesasdeterminedbyMethodA.AfactorforconvertingcompressivestrengthvaluesbasedonheighttodiameterratioisgiveninSection8.3Note18212;TheagencyperformingthistestmethodcanbeevaluatedinaccordancewithPracticeD3740.Notwithstandingstatementsonprecisionandbiascontainedinthistestmethod:theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnot,initself,ensurereliabletesting.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthesefactors.1.1Thistestmethodcoversthedeterminationofthecompressivestrengthofsoil-cementusingmoldedcylindersastestspecimens.1.2Twoalternativeproceduresareprovidedasfollows:1.2.1MethodA-Thisprocedureusesatestspecimen4.0in.(101.6mm)indiameterand4.584in.(116.4mm)inheight.Heighttodiameterratioequals1.15.Thistestmethodmadebeusedonlyonmaterialswith30%orlessretainedonthe3/4-in.(19.0-mm)sieve.SeeNote3.1.2.2MethodB-Thisprocedureusesatestspecimen2.8in.(71.1mm)indiameterand5.6in.(142.2mm)inheight.Heighttodiameterratioequals2.00.ThistestmethodisapplicabletothosematerialsthatpasstheNo.4(4.75-mm)sieve.1.3AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard,exceptasnotedin1.4.1-1.4.3.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunits,andareprovidedforinformationonlyandarenotconsideredstandard.1.4.1Thegravitationalsystemofinch-poundunitsisusedwhendealingwithinch-poundunits.Inthissystem,thepound(lbf)representsaunitofforce(weight),whiletheunitformassisslugs.1.4.2Theslugunitofmassisalmostneverusedincommercialpractice(density,scales,balances,etc.).Therefore,thestandardunitformassinthisstandardiseitherkilogram(kg)orgram(g),orboth.Also,theequivalentinch-poundunit(slug)isnotgiven.1.4.3Itiscommonpracticeintheengineering/constructionprofessionintheUnitedStatestouseconcurrentlypoundstorepresentbothaunitofmass(lbm)andofforce(lbf).Thisusecombinestwoseparatesystemofunits,theabsolutesystemandthegravitationalsystem.Itisscientificallyundesirabletocombinetheuseoftwoseparatesetsofinch-poundunitswithinasinglestandard.Asstatedin1.4.2,thisstandardusesthegravitationalsys......
【中国标准分类号】:Q14
【国际标准分类号】:93_020
【页数】:4P.;A4
【正文语种】:


Product Code:SAE AMS3110
Title:Primer, Zinc Chromate (NONCURRENT Aug 2001)
Issuing Committee:Ams G8 Aerospace Organic Coatings Committee
Scope:This specification covers a zinc chromate primer in the form of a liquid. This product has been used typically as a protective coating on metals and on molded or laminated synthetic resins, but usage is not limited to such applications.