无机非金属专业外文翻译低水灰比复合水泥的水化.docx

无机非金属专业外文翻译低水灰比复合水泥的水化.docx

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无机非金属专业外文翻译低水灰比复合水泥的水化

外文资料翻译

TheHydrationofBlendedCementatLowW/BRatio

ABSTRACT：

Thehydrationprocess,hydrationproductandhydrationheatofblendedcementpastemixedwithmineraladmixtureandexpansiveagentatLow/BratioarestudiedByrd^Thermosanalysis,andcalorimetryinstrument,andtheywerecomparedwiththoseimpurecementpaste.TheresultsshowthatpurecementandblendedcementatLow/Bratiohavethesametypeshyperproductions,butrespectiveamountshyperrationalproductsofvariousblendedcementsatsameagesAntheavariationOlatheamountofsamehydrationwithagesaredifferent;TheJointeffectliquefactionfodgel-deterringduetowaterabsorptionandtheexpansivepressureonmilleporeadriftcausedSothebycrystallogeneticistheimpetusofthevolumeexpansioncementapaste^andRothermereeffectismuchgreaterthanthelatterone.

KEYWORDS:

hydration;blendedcement;lowW/Bratio;expansionmechanism

1Introduction

Thehydrationandhardeningprocessesofordinarycementhavebeenstudiedintensively[1-3].Partlyreplacingcementwithflyash,slag,orotheractivemineraladmixturecannotcommodifythecementstrengthgrade,reducethehydrationheatofcement,butalsomelioratethestructureofhardencementpaste[4].Applyingexpansiveagentinordinaryconcretecancombinethebearingandwaterprooffunctionsofabuilding,anditcanalsoreducetheshrinkageandpreventthecrackingofconcrete[5,6].However,thehydrationprocessofcementmixedwithflyash,slagandexpansiveagentatLow/Bratioundernon-saturationwater

conditionneedtobestudiedsufficlently.Soweexecutetheresearchworkinthisfield.

2Elementarily

2.1Rawmaterials

（1）Cement:

Gra（le42.5POcementproducedbyHuitainCementCompanyinChinawasused.

（2）Flyash:

GroundflyAshdownproducedbyathermoelectricityplant.

（3）Slag:

GroundblastfurnaceslagwasproducedbyWuHanSteelCompanyinChinawhosespecificsurfaceis6000cm2/g.

（4）Expansiveagent:

（a）UEAexpansiveagentwasmanufacturedbyZhengzhouCompany,ThechemicalcompositionsofrawmaterialsareshowninTableL（b）Twokindsofexpansivegrandparentalpreparedbyourselves;ThemaincomponentsexpansiveagentarrawaluniteandCaSO4-2H2Oandthoseexpansiveagentincludeautunite.clinkerandsulphonatecementCaSO4-2H2O.

2.2Method

221Preparationofcementpastesampleunderbreechingcondition

Thepurecementpaste（orcementpastemixedwithmineraladmixtureandexpansiveagent）waspreparedin20x20x20mmmoukl.ThespecimenDemopolisafter24hofstandardcuring（20°C,RH90±5%）,andthencuredwithoutmoldsunderthesameconditiontotestages.

2.2.2Measuringthehydrationheatofcementpaste

ADardansblandXMD50000seriesintellectiveinstrumentandastandardCu-Thermosresistancetemperaturesensorwereused.Thetemperaturemeasuringrangewas-50PCto150*C.Afterbeingmixedevenly,thecementpaste.Samplewasputintotheroundvacuumflask,andthetemperaturesensorwasembeddedintothecementpaste,sealingthemouth

oftheflaskwithPVClaminaandolefinandcontinuouslymeasuringthetemperaturevariationofthecementpasteat20eCenvironmenttemperatureuntilthetemperatureofcementpasteisthewherewithalofenvironmenttemperature.

3ResultsandDiscussion

3.1Hydrationprocessofblendedcement

Weused15%flyashJ5%flagand10%UEAtoreplacecorrespondencycement^andstudiedthehydrationproductswithXRD.Thespecimenswereallmoldedandcuredunderfree,Low/Bratio（0.28）andmoistconditions（butnotsoakedintowater）.FromFlg.ltoFig.4wecanlearnthatthetypesofthehydrationproductsofpurecementandblendedcementarethesame.AllofthemareC・S・H,CH,Aftetc.Inaddition,therehemihydratedC3SandCISetc.Butinthesamehydrationage,theamountofallkindsofhydrationproductsdiffersobvlously.Andthisfactisreflectedinthedifferencesoftherelativeintegrityofthediffractionpeaks（Counterseal-e）.WelisttherelativeintensityofthediffractionpeaksofthemainhydrationproductsandhydratedC3SandC2Satagesof3dand28dageinTable2.

TablelCharacteristicsofRawMaterials

Clxinical

SS

/（mlkg*）

HUD

/MPa

SiO,

FeA

TO.

Cat）

W）

SOj

Cmient

21.47

5.80

4.W

■

59.64

3.11

2.US

2.W

319

—

57

UEA

29.50

7.76

2.R2

■

17.93

1.83

24.7）

20.67

—

—

s辰

34.76

15.39

L20

■

35.86

9.07

3.S）

一

颇

99

—

If2」

».ll

26.15

4.68

6.4]

2.3）

1.93

0.43

7.8

286

KB

—

SS:

Specificsurface;RWD:

Ratioofwaterdemand;R28:

Compressivestrengthof28d

Table2TheRelativeIntensityoftheDiffractionPeaks/Counts

fti&GmertCemml+15@$坷15殳FlyA4il：

«nert+lO^UEA

C?

S

111

Aft

GS

CH

Ah

C?

S

（H

A（k

CjS

CH

AFi

75

63

50

6J

1（8

50

的

78

41

60

10）

&

28

41

123

47

42

96

47

41

69

45

40

80

65

3d

10203040

20

Fig.lXRDpattern