基本信息
标准名称: | 路桥用水性沥青基防水涂料 |
英文名称: | Water quality asphalt waterproof coating for roads and bridges |
中标分类: |
工程建设 >>
交通运输工程 >>
公路工程 |
ICS分类: |
土木工程 >>
道路工程 >>
道路建筑材料
|
发布部门: | 中华人民共和国交通部 |
发布日期: | 2004-08-17 |
实施日期: | 2004-12-01 |
首发日期: | |
作废日期: | |
提出单位: | 交通部公路科学研究所 |
归口单位: | 交通部科技教育司 |
起草单位: | 交通部公路科学研究所、北京交通大学 |
起草人: | 雷俊卿、李昌铸、夏晓霞、朱贤明、付春晓、徐邦全、唐素荣、闺炳润、赵青山、朱洪 |
出版社: | 人民交通出版社 |
出版日期: | 2004-12-01 |
页数: | 7页 |
适用范围
本标准规定了路桥用水性沥青基防水涂料的分类、技术要求、试验方法、检验规则和标志、包装、运输、贮存等。
本标准适用于公路、城市和铁路桥梁及涵洞等防水工程为主要用途的乳化沥青防水材料以及在其中掺入各种改性材料的水乳性防水涂料。
前言
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目录
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引用标准
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所属分类: 工程建设 交通运输工程 公路工程 土木工程 道路工程 道路建筑材料
【英文标准名称】:StandardTestMethodforChipImpactStrengthofPlastics
【原文标准名称】:塑料破碎碎片冲击强度的标准试验方法
【标准号】:ASTMD4508-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:breakingenergy;cantileverimpact;chipimpactstrength;impactplastics;impacttesting;microcracks;pendulum;plastics;smallspecimenimpact;weatheredimpactstrength;Chipimpactstrength;Environmentalcontrol/fate;Cantilevertesting;E
【摘要】:Thechip-impacttestisavariationoftheIzodimpacttestdescribedinTestMethodsD256.Thespecimengeometryhasbeenchosentofitthreebasiccriteriaasfollows:Thespecimenisrelativelythinandisstruckonthebroadsurfacesothatthetestresultissensitivetotheconditionofthesurface,Thespecimenisrelativelysmallforefficientutilizationofspaceinacceleratedtestingmediaordevicesandtominimizeamountsofmaterialneededfortesting,andThespecimencanbetestedusingastandardIzodpendulumtester.Ithasbeenfoundthata12.7-mm(0.500-in.)widestripwithathicknessintherangefrom1.02to3.18mm(0.040to0.125in.)meetstheabovecriteria.Muchexperimentalworkon1.78-mm(0.070-in.)stripshasdemonstratedtheutilityofthechip-impacttesttotrackweatheragingofavarietyofmaterials.Thedistance(L)betweenclampingandimpactpoints(strikerheight)willaffecttestresults.ExtensiveexperimentalworkhasestablishedthataratioofL=2.182h(whereListhedistancebetweenclampingandimpactpointsandhisthethicknessofthespecimen)willprovideaccurateandsensitivechip-impactvalues.Increasingthisratio(thatis,raisingthestrikerheightforagiventhickness)lowerschip-impactvaluesandreducessensitivityofthetest.Decreasingtheaboveratio(thatis,loweringthestrikerheightforagiventhickness)resultsinashearingofthespecimenratherthanthedesiredbendingandbreaking.Ingeneral,thechip-impactvalueduringweatheringvariesaccordingtospecimenthickness,evenafteradjustingstrikerheightsforconstantdeflection,asgiveninTable1.Reportthethicknessofthespecimen,alongwiththetestvalues,makingcomparisonsonlybetweensampleswithsimilarthickness.ThestandardIzodMethodsA,C,D,andErequirethatthetypeoffailureforeachspecimenberecordedasoneofthefourcodedcategoriesdefinedasfollows:1.1Thepurposeofthistestmethodistoprovideanimpacttestthatcanbeperformedonsmallspecimensofplasticsofdifferentthicknesses.Thistestmethodisespeciallysuitedforobservingtheeffectsofmicrocrackscausedbyweathering,orbyexposuretosolventsorotherhostileenvironments,onthesurfaceofplasticmaterials.Itisnotmeanttobeusedasareplacementforanyexistingimpacttest,butcanbeusedtomeasureimpactoncouponsmachinedfromfinishedpartsthatcannotbetestedbythedrop-weight,Izod,orCharpymethodbecauseofshapeorthicknesslimitations.1.2Thechip-impacttestisrunonsmall,flat,unnotchedspecimensusingastandardpendulum-impactdevice.Thetestplacestheimpactedsurfaceintensionand,fornotch-sensitivematerials,isextremelysensitivetothepresenceofsurfacemicrocracks.Thus,forplasticsthatdevelopsurfacecrackswhenexposedoutdoors,thechip-impacttestisaseveretestoftheweatheredimpactstrength.1.3Round-robintestinghasindicatedthatmaterialsthatbreakattotalenergyvaluesoflessthan0.17joules(1.5in.-lbf)havewithin-laboratorycoefficientsofvariationofapproximately30%.Therefore,suchvaluesareconsideredoutofthenormaltestingrangeforthistest.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.5ThereisnoknownISOequivalenttothistestmethod.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuser......
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:6P.;A4
【正文语种】:英语