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、HardeningacceleratbasedonnewchemicalsefficientatlowtemperatureinblendedcementAlManasirN1JuvikD.A1RauseoR1NgS21.MapeiASVallsetvegen6Sagstua2120Nway2.SINTEFByggfskFskingsveien3bOslo0314NwayAbstractTheusageofblendedcementsa
2、lsodemsfhighproductivityinbuildingindustryevenduringwintertimeincreasetheneedfmeefficienthardeningaccelerat.Theindustryfacestheproblemoftraditionalacceleratsnotwkingatlowtemperaturesaproblematicreductionofslumpretentiond
3、uetoearlysettingofmatrix.Toaddressthischallengetheperfmanceofhardeningacceleratsaswellasincombinationwithasettingaccelerathavebeenhighlightedftheireffectivenessincementsblendedwithslagflyash(CEMII)here.Theacceleratsweres
4、howntowkextremelywellatbothlow5Croomtemperaturewherebycompressivestrengthsofconcretecastedduringearlyhydrationwerefoundtobeupto150%higherthanwithouttheuseofacceleratsatlowtemperature5C24h.Additionallythecompressivestreng
5、thsat28dayswerenotnegativelyaffectedbutincreased.Nodetrimentaleffectontheconcreteslumpflowwasfoundmakingthemidealfimprovingthehydrationofblendedcements.Extendeduseofblendedcementreducedheatingofthefreshconcretewillfroman
6、environmentallyperspectivereduceenergyconsumptioncarbonprintfromtheindustry.Fromaneconomicalperspectiveanewefficientwelldocumentedacceleratcanincreasetheproductivityonsiteinwintercostreductionbetterqualityincreasedsecuri
7、tyinbuildingprocess.iginalityNewdevelopedacceleratshowhugeincreaseinearlystrengthdevelopmentatlowtemperaturewillbeanimptantcontributiontothedevelopmentoffuturecastingtechniquesinareaswithlowtemperature.Keywds:Hardeningac
8、celeratcastinginlowtemperatureearlystrengthblendedcement.1Crespondingauth:Tel4797011747Fax4762972099OxideCEMIIAV42.5RCEMIIAV52.5NCEMIIBS52.5NSiO225.5523.524Al2O38.386.46.5Fe2O34.033.42.0CaO51.9956.357MgO2.512.65.3SO33.69
9、3.53.0K2O1.191.20.65Na2O0.570.30.3Na2Oekv.1.41.10.73C3A5.45.3Flyash2012.3Blainefineness(m2kg)450445470Density(kgm3)2990301430802.2AggregatesThenaturalaggregates08mm816mmusedweresuppliedbyNStoneAs(Nway).Thefineaggregateha
10、saspecificgravityof2.68kgdm3waterabsptionof0.3%whilethecoarseaggregatehasaspecificgravityof2.69kgdm3waterabsptionof0.4%.Themoisturecontentoftheaggregateswasmeasuredonthesamedayastheywereused.ThegradingcurvesareshowninFig
11、ure1.Figure1Gradingcurvesofmixturesoffinecoarseaggregatesreferenceacombinedcurvefa)C3037D16concreteb)C3545D16concrete.2.3AcceleratsCompressivestrengthaswellasotherstructuralpropertiesofconcretedependslargelyonthedegreeto
12、whichcementhydrates.ThemaintaskofthispaperistohighlighthardeningacceleratsfblendedcementswhichwasfmulatedbyusingchemicalsbasedontherequirementstateinEN9342.AccdingtostardEN9342ahardeningacceleratisdefinedas:“achemicaltha
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
- the hydration of blended cement at low w_b ratio
- The Hydration of Blended Cement at Low W_B Ratio.pdf
- The Hydration of Blended Cement at Low W_B Ratio.pdf
- comparison study on volumetric deformation of gap-graded blended cement, interground blended ceme
- a new low-temperature synthesis route of methanol_ catalytic effect of the alcoholic solvent
- experimental investigation of hydration of ternary blended cement paste
- A New Low-Temperature Synthesis Route of Methanol_? Catalytic Effect of the Alcoholic Solvent.pdf
- Property analysis of Basalt Fiber Fast Setting and Hardening Cement Reinforced Concrete.pdf
- a microcontroller-based programmable temperature controller
- A microcontroller-based programmable temperature controller .pdf
- co2-reducing cement based on calcium silicates
- A microcontroller-based programmable temperature controller .pdf
- control system design of constant temperature box based on pid
- Optical Diagnostics on HCCI Inhomogeneity and Biofuels Low Temperature Combustion.pdf
- intelligent network temperature and humidity measuring system based on usb interface
- design of the temperature control system based on at89s51
- a new decision support system based on datamining
- Develop New of Efficient Catalysts for Hydrodesulphurization Processes of Fuel Oils.pdf
- bandwidth-efficient modulation codes based on nonbinary irregular repeat–accumulate codes
- a new professional training approach based on set theory
評論
0/150
提交評論