FIG.1ToolforLevelingCaulkingCompoundintheShrinkageTestSpecimen
compoundforatleast5hat2362°C(73.463.6°F).
ureforShrinkageDetermination
9.1Placethebrassringononeoftheground-glassplates.
Determinethevolumeoftheringby?llingitwithdistilled
waterat2362°C(73.463.6°F),
thewaterslowlyfromtheburetintotheringsothatthereare
noairbubblesvisiblewhentheglasscoverplateiscenteredon
theamountofwaterrequiredto?llthe
ringtothenearest0.03mL,asV
r
.
a6-mm
1
(?
4
-in.)layerofcompoundinthering,usingthelevelingtool
toformgoodcontactwithringandstone(Fig.1).Theleveling
toolshould?t?rmlyagainsttheinsidesurfaceoftheringwhile
stilledwaterfromtheburetintothe
ringuntilitisexactly?lled(withoutairbubbles),asdeter-
minedbycoveringwithaground-glassplate(Fig.2).Record
thequantityofwaterneededto?llthering(readingtheburet
toanaccuracyof0.03mL)anddesignatetheamountasV
i
.
9.3Pouroutthewaterfromtheringandplacethespecimen,
atthesamelevelasthetemperaturemeasuringdevice,inan
ovensetat6562°C(14963.6°F)ndofthis
exposureperiodandafterthespecimenhascooledfor2hat
roomtemperature,repeatthe?llingoftheringusingtheburet
andrecordthevolumeofwaterusedasV
f
.
ation
10.1Calculatetheshrinkage,involumepercent,asfollows:
Shrinkage,%5
@~
V
f
2V
i
!
~
V
r
2V
i
!#
3100(1)
where:
V
r
5volumeofring,mL,
V
f
5volumeofwaterrequiredto?llringafter120h
exposure,and
V
i
5volumeofwaterrequiredto?llringbeforeoven
exposure.
ureforTenacityDetermination
11.1Aftertheshrinkagedeterminationhasbeencompleted,
runthepointoftheknifebladealongtheinsideedgeofthering
e
stiffputtyknife,loosenonehalfofthecaulkingpatfromthe
heputtyknifeundertheloosenedportionofthe
compoundandfoldover180°ontotheremainingpartofthe
compound,returntotheoriginalposition,andrepeatthe
operationuntilsixfoldshavebeenmadealongthesameline.
Embrittlementorlackoftenacityisindicatedbybreakingor
crackingofthecaulkinglayeratthecrease.
12.1Shrinkage—Reportthepercentofvolumeshrinkage.
12.2Tenacity—Reportaspassorfail;passagerequiresa
minimumofsixfolds.
ionandBias
13.1Shrinkage—Onthebasisofaroundrobininwhich
FIG.2StagesintheShrinkageTestProcedure
eightlaboratoriestestedtwosamples,the“between-
laboratories”standarddeviationoftheamountofshrinkage,
expressedinpercent,byvolume,
onthisvalueofthestandarddeviation,thefollowingcriteria
shouldbeusedforjudgingtheacceptabilityofresultsatthe
95%con?dencelevel:
13.1.1Repeatability—Nodataatthepresenttime.
13.1.2Reproducibility—Tworesultsobtainedbyoperators
indifferentlaboratoriesshouldbeconsideredsuspectifthey
differbymorethan3.8percentagepoints.
13.2Tenacity:
13.2.1Onthebasisofaroundrobininwhicheight
laboratoriestestedtwosamplesina“pass-fail”test,therewas
aunanimousagreementamongalltheparticipantlaboratories
onthetwosamplestested.
13.2.2Repeatability—Nodataatthepresenttime.
ds
14.1caulkingcompound;?exibility;shrinkage
TheAmericanSocietyforTestingandMaterialstakesnopositionrespectingthevalidityofanypatentrightsassertedinconnection
fthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuch
patentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.
Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedevery?veyearsand
ifnotrevised,mmentsareinvitedeitherforrevisionofthisstandardorforadditionalstandards
mmentswillreceivecarefulconsiderationatameetingoftheresponsible
technicalcommittee,eelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyour
viewsknowntotheASTMCommitteeonStandards,100BarrHarborDrive,WestConshohocken,PA19428.
2021年4月26日发(作者:美的置业(hk03990)美的置业东)证券代码:600879 证券简称:航天电子 公告编号:2021-003 航天时代电子技术股份有限公司 2021年第一次临时股东大会决议公告 本公司董事...
6003932021年4月27日发(作者:第一位回归公募明星经理,嘉实主题精选邹唯再次离职!嘉实)拼多多拼快快(活动区) 活动材料两种颜色拼板(电子图稿),图形骰子。 可能出现的玩法 第一种玩法: 1.两位幼儿每人一种颜色材料,轮流投骰子。...
1、为什么申花跟舜天是死敌,上海人 说不清楚,打比方吧 从起因来看 舜天球迷观点:2009年,舜天征战虹口,申花球迷喊:舜天降级 申花球迷观点:2009年,舜天征战虹口,有舜天记者先挑衅,并且舜天球迷号称要申花退出亚冠。分析: 1...
1、华夏幸福,为什么股票大 跌? 股票涨跌都很正常,华夏幸福前期涨了一些,本身现在大盘下跌较多,个股随大盘下跌很正常。 2、华夏幸福股票原名叫什么名字 2011年8月29日,华夏幸福基业股份有限公司与浙江国祥制冷工业股份有限公司的重...
|香溢融通股吧2021年4月28日发(作者:米宅科技(872208)米宅科技)中国巨石 玻纤行业的中国实力| 文 · 本刊记者 陈曦【期刊名称】中国新时代【年(卷),期】2019(000)001【总页数】52018年12月9日,被誉为中国工...
2021年4月27日发(作者:场内T 0基金一览表易方达创业板ETF(of159915))百事公司的成功案例关于百事公司成功的案例新型磁性压盖的优势百事罐装集团,底特律工厂的新型磁性压盖将维修费用降低了75%,安装之后两年内无需整修。即使有...