waste glass as an alternative alkaline activator in the preparation of alkali activated materials_第1頁
已閱讀1頁，還剩14頁未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請進(jìn)行舉報或認(rèn)領(lǐng)

文檔簡介

1、WasteglassasanalternativealkalineactivatinthepreparationofalkaliactivatedmaterialsM.TresCarro1F.Puertas11.EduardoTrojaInstitutefConstructionSciences(IETccCSIC)CSerranoGalvache428033MadridSpainAbstractAlkaliActivatedMater

2、ials(AAMs)aregenerallyregardedasoneofthemosteffectivealternativestoCO2emissionintensivePtlcement.Theprimaryobjectiveofthepresentstudywastoexpletheviabilityofalkaliactivatingindustrialbyproductssuchasblastfurnaceslagflyas

3、hwithwasteglasstopreparenewcementitiousmaterials.Thepaperdescribesthemethodologydevelopedtoobtainanalternativealkalineactivatbasedonwasteglass.Pasteswerepreparedwithalkaliactivatedslag(AAS)flyash(AAFA)withanumberofactiva

4、ts.IntheAASsystemstheseincludedsolutionscontainingwaterglassNaOHNa2CO3wasteglass.Aconstantconcentration(5%bymassofslag)wasusedthroughout.Theactivatsintheflyashsystems(AAFA)were8MNaOH10MNaOH15%waterglass10MNaOHmixedwithwa

5、steglass.ThesemtarsweretestedfmechanicalstrengthpositythepasteswereacterisedwithFTIRXRD29Si27AlNMRBSEMEDX.Thedegreeofreactionwasalsodeterminedinallthesystemswith29SiNMR1:20HCl.Irrespectiveoftheigini.e.dissolvedwasteglass

6、commercialwaterglasstheSiintheAASAAFAsystemsexhibitedsimilarbehaviourthetwotypesofactivatyieldedpastesmtarswithcomparableacteristicsproperties.iginalityTheneedtominimisegreenhousegas(mainlyCO2)emissionshasdriventhepursui

7、tnotonlyofcementalternativestoPtlcement(asAlkaliActivatedMaterials(AAMs))butalsotoalternativeactivattocommercialsodiumsilicateswhosemanufactureisacterisedbyhighpowerdem.UrbanindustrialwasteglassasSiO2Na2Orichvitreousmate

8、rialscanbeusedaspartialtotalreplacementsfsuchcommercialsodiumsilicatesinthepreparationofMMs.Afterdissolutioninalkalinesolutionswasteglasscanactivateblastfurnaceslagflyashtogeneratenewcementitiousmaterialswithmicrostructu

9、repropertiesmechanicalstrengthcomparablestothoseobtainedwithcommercialwaterglass.Keywds:alkalinematerialswasteglassalternativeactivatswaterglassacterizationproperties1Crespondingauth:Tel34913020440Fax34913020700Glassisan

10、idealmaterialtoberecycledwhereoncerecycledtheirusecanhelpsaveenergyinpreparingnewglassesduetorequires26%lessenergyitislessexpensivereducesrawmaterialsemployedinthepreparationofglasses.Howeverthereisapercentagebetween1030

11、%ofthesewasteglassesarenotreallocatedtothepreparationofnewglasscontainersbecausetheyhavesomekindofimpuritieseithermetalceramictype.Theconstructionsectplaysanimptantroleinthereuseofthispercentageofwasteglassusingthemaspoz

12、zolanicadditionsinthepreparationofPtlcementinthepreparationofvitroceramiccompositestogetherwithotherindustrialwastebyproductssuchasflyashslagceramicdiscardsasaprimematerialfsynthesizingsolidsodiumsilicatespurifiedsilica.

13、Inthislaterapplicationveryrecentresearchbyourgroup(PuertasTresCarro2014Puertasetal.2012a2012bTresCarroetal.20142012)haveshownthatsodiumsilicatebasedurbanwasteglassmayserveasanactivecomponentinthepreparationofalkaliactiva

14、tedslag(AAS)flyash(AAFA)cements.TheoptimalconditionsofsolubilityconcentrationofionsmainlySiO2Al2O3havebeenestablishedwhichallowedustousethesesolutionsasanalternativeactivatinthepreparationofalkaliactivatedslagflyashpaste

15、s(PuertasTresCarro2014Puertasetal.2014TresCarroetal.2014).Withthiswkwewanttoshowthattheuseofwasteglassasactivatinaluminosilicatematerialscaniginatesystemswithverysimilarmechanicalperfmancethanwhenacommercialsodiumsilicat

16、e(waterglass)isused.2.Experimental2.1.RawMaterialsInthisstudywereusedasstartingrawmaterialsanurbanindustrialwasteglassatypeFflyashSpanishvitreousblastfurnaceslag.Table1givesthechemicalcompositionofallmaterials.Thevitreou

17、sphaseaccountedf99%oftheslagcontentspecificsurfaceofthismaterialwas325m2kg.Thefollowingactivatingsolutionsallataconstant5%Na2Obyslagmasswereused(PuertasTresCarro2014TresCarroetal.2014):?5050molarsolutionofNaOHNa2CO3(Panr

18、eacanalyticalgrade98%sodiumhydroxide99.8%sodiumcarbonate)yieldingasolutionwithapHof13.6.?Commercialwaterglass(Merck27%SiO28%Na2O65%H2Obyweight)withaSiO2Na2Oratioof1.2.?5050molarsolutionofNaOHNa2CO3solutionswithdifferenta

19、mountsofdissolvedwasteglass(from1to25gper100mLofsolution).TheSiO2Al2O3ratiointheflyashwas≈2.Threealkalineactivatswereusedtoactivatetheflyash:NaOH8MNaOH10M15%ofwaterglassasolutionofNaOH10Mmixedwithdifferentproptionsofwast

20、eglass(101525gper100mLofsolution)(TresCarroPuertas2015).Theafementionedamountsofglass(particlesizeofunder45m)weremixedwiththesolutions(NaOHNa2CO3fblastfurnaceslagNaOH10Mfflyash)magicallystirredat802Cf6hours.Thesolutionwa

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫僅提供信息存儲空間，僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

最新文檔

評論

0/150

提交評論