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【英文标准名称】:StandardPracticeforUsingaTestChamberforHumidityConditioningofTestPanelsofPavementMarkingPaints
【原文标准名称】:路标涂料试验板湿度调节用试验室使用的标准实施规程
【标准号】:ASTMD7539-2010
【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】:D01.44
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:dryingrateordryingtime;drythrough;no-pick-up;relativehumidity;testchamber;washoutresistance;waterbornetrafficpaint
【摘要】:Thedryingrateoforganiccoatingsvarieswithchangesintemperature,airflow,andrelativehumidity.Inparticular,thedryingrateofwaterbornepaintsdependsontheevaporationofwaterandthusismuchmoredependentonrelativehumiditythanaresolventbasedpaintsorpaintsthatare100%solids.Measurementoftherateofdryingofwaterbornepaintsunderambientconditionsinlaboratoriescannotbeadequatelyreplicatedwithoutsomecontrolofthedryingconditions.Atestchamberwillbedescribedthatprovidesameansofcontrollingrelativehumidityaboveambienthumidityandminimizingtheeffectsofairflowvariabilityatambientroomtemperatures.Ifdesired,thetestchamberwithoutwaterinitandwithventswideopencanbeplacedinatemperatureandhumiditycontrolledroomtotestdryspeedatvarioustemperaturesaswellashumiditywhileusingthechambertominimizetheeffectofairflow.Thispracticeisparticularlyusefulfortestingthedryingrateofwaterbornepavementmarking(traffic)paintswherefastdryatelevatedambienthumidityisanimportantfeature.Forwaterbornetrafficpaints,thetestchambercanbeusedtoevaluatedrytono-pick-up(TestMethodD711)andwaterwash-offresistance(PracticesD7377andD7538)atelevatedambienthumidity.1.1SpecificationD3924definesastandardenvironmentof23x00B1;2x00B0;Cand50x00B1;5%relativehumidityandfreefromdraftsfornormalconditioningandtestingofpaint,varnish,lacquer,andrelatedmaterials.Thispracticedescribesatestchamberthatallowsforcontrolofrelativehumidityabovetheambientrelativehumidityandminimizationofairflowforconditioningoftestpanelsatelevatedrelativehumidityandroomtemperatures.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G51
【国际标准分类号】:93_080_30
【页数】:6P.;A4
【正文语种】:英语