东方财经股票2453(PT2453)

中色股份股吧002623股票今日停牌中关村证券股票002276股神林园博客高鸿股份股吧四川九洲股票亿阳信通股吧|大冷股份股票2021年4月28日发(作者：以后15点成交那个数据是什么意思?棕榈股份(002431))

FIG.1ToolforLevelingCaulkingCompoundintheShrinkageTestSpecimen
compoundforatleast5hat2362°C(73.463.6°F).
ureforShrinkageDetermination
9.1Placethebrassringononeoftheground-glassplates.
Determinethevolumeoftheringby?llingitwithdistilled
waterat2362°C(73.4000617股票63.6°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
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“是啊，这道题，足够作为高考的物理压轴题了。”王晓玉说道。 等到说完，就看到了一众人的表情，心中就明白过来。 杜友文的心中顿时就是一沉。