Cov cellulose muaj kev hais ua yog hom organic polymer sib txuas ua ke ntawm ntuj cellulose los ntawm ntuj cellulose. Lawv feem ntau siv nyob rau hauv cov ntaub ntawv hauv tsev, tshwj xeeb tshaj yog cov khoom noj raws li cov ntaub ntawv. Kev cuam tshuam ntawm cellulose ether rau ntawm cov cement haas cov khoom siv, thiab kev txhim kho cov khoom siv ntawm cov txiv morpor hydration.
1. Taw qhia rau Caas Cock
Cov txheej txheem hydration ntawm cov cement yog cov txheej txheem ntawm lub cev ua kom zoo thiab cov tshuaj lom neeg ntawm cov xis thiab dej. Cov tshuaj tiv thaiv no ua rau cov cement muab cov qauv hydration xws li calcium silicate dej (CCHASY Hydroxide (Ch). Thaum lub sij hawm ua tus txheej txheem no, kev co ntawm cov cement, kev nplua nuj khaws cia ntawm cov khoom tawg thiab cov khoom ntawm cov dej qab zib thiab lub zog ntawm cov qhob kawg.
2. Lub tshuab ua haujlwm ntawm kev ua ntawm cellulose
Cellulose ether ua yeeb yam tseem ceeb lub cev nqaij daim tawv thiab tshuaj tswj lub luag haujlwm hauv cov txheej txheem cement. Cellulose ether tsuas yog cuam tshuam rau cov txheej txheem hydration ntawm ob txoj kev: ib qho yog los ntawm kev faib tawm thiab evaporation ntawm cov dej hauv txoj kev xis mas slurry; Lwm tus yog los ntawm kev cuam tshuam cov dispersion thiab kev sib cais ntawm cov Maas hais.
Ya ya raws thiab dej khaws cia
Cov neeg muaj kev pab hais tias cov neeg muaj kev hais ua neeg muaj peev xwm loj hlob ntawm cov dej khaws cia ntawm cov khoom siv xis mas. Vim nws muaj zog hydrophilicity, cellulose ether tuaj yeem tsim cov tshuaj khov kho hauv dej, uas tuaj yeem nqus thiab khaws noo noo. Qhov kev sib tw dej no yog qhov tseem ceeb hauv kev txo cov kab nrib pleb tshwm sim los ntawm cov dej sai hauv kev ua vaj tse thaum lub sij hawm co. Tshwj xeeb tshaj yog nyob rau hauv qhuav ib puag ncig lossis kev ua haujlwm siab ether etherively tiv thaiv kom zoo sai thiab ua kom cov dej ntws tawm tau txaus los txhawb cov kev ua dej hiav txwv zoo li qub.
Rheology thiab thickening
Cellulose hais tau hais tias muaj neeg muaj cai kuj tseem tuaj yeem txhim kho cov rhuaology ntawm Maas Slurries. Tom qab ntxiv cellulose ether, kev sib xws ntawm cov xis mas slurry yuav nce. Qhov tshwm sim no mas yog feem ntau ntaus nqi rau cov saw ntev tsim los ntawm cellulose ether molecules hauv dej. Qhov ntev-saw molecule tuaj yeem txwv lub zog ntawm cov pajas ua kom pom tseeb, yog li nce lub viscosity thiab sib xws ntawm slurry. Cov cuab yeej no yog qhov tshwj xeeb tshaj nyob rau hauv cov ntawv thov xws li plastering thiab vuas cov nplaum, vim nws tiv thaiv xis los ntawm ntws nrawm dhau thaum muab kev tsim kho kev tsim kho zoo dua.
TAM SIM NTU THIAB HLOOV LUB SIJ HAWM
Cellulose ether tuaj yeem ncua kev coasent tshuaj tiv thaiv ntawm cov cement thiab nce qhov chaw teeb tsa thawj zaug ntawm Maas Slurry. Cov nyhuv no tshwm sim vim hais tias cov molecules ntawm cellule ntawm cellulbed ntawm sab xis ntawm kev tiv thaiv kev sib cuag ntawm cov dej thiab MAAs hais, yog li maj mam txo cov dej cawv. Los ntawm kev ncua sij hawm teem sijhawm, cov neeg cellulose muaj kev pab cuam tshuam tau txhim kho kev tsim kho kev tsim kho, muab cov neeg ua haujlwm pabcuam siv sijhawm ntau dua los hloov kho thiab kho kom haum.
3. Cov nyhuv ntawm daim ntawv ntawm Maas Cov Khoom Siv Illation
Lub xub ntiag ntawm cov cellulose cov neeg muaj kev pab hais kuj tseem cuam tshuam rau microstructure ntawm cov khoom noj xasas dej. Cov kev tshawb fawb pom tau tias morphology ntawm calcium silicate dej (CSH) Gel yuav hloov pauv tom qab ntxiv cellulose ether. Cellulose ovher molecules yuav cuam tshuam rau cov qauv siv lead ua ntawm CSH, ua rau nws xoob ntau dua. Lub teeb ntawm txoj cai no yuav txo lub zog thaum ntxov, tab sis nws kuj tseem yuav pab txhim kho cov khoom muaj zog ntawm cov khoom.
Cov neeg hais txog cellulose tseem tuaj yeem txo qhov kev tsim ntawm ettringite thaum lub sij hawm hydration txheej txheem. Vim tias cellulose ether retards tus nqi ntawm kev sib tw ntawm kev ua kom muaj kev ntxhov siab hauv txoj kev ntxhov siab sab hauv los ntawm kev nthuav dav thaum lub sijhawm kho.
4. Cov nyhuv rau kev txhim kho lub zog
Cellulose Cov neeg muaj kev pab hais tias muaj kev cuam tshuam loj rau lub zog kev txhim kho ntawm cov khoom siv Maas. Vim tias cellulose muaj cov neeg ua kom muaj tus nqi ntawm cov txiv hmab txiv ntoo ntawm cov cement, kev txhim kho thaum ntxov ntawm cov txiv neej ua kom qeeb qeeb. Txawm li cas los xij, raws li cov tshuaj tiv thaiv hydration txuas ntxiv, cov nyhuv kev tswj hwm ntawm cov dej ether ether tuaj yeem txuag, uas yuav pab txhim kho lub zog hauv tom qab theem.
Nws yuav tsum raug sau tseg tias ntxiv nyiaj thiab hom cellulose ether muaj ntau dual cuam tshuam rau lub zog. Ib qho kev tsim nyog ntawm cellulose tuaj yeem txhim kho kev ua haujlwm zoo thiab ua kom muaj zog dua tuaj yeem ua rau thaum muaj zog siv tau thiab cuam tshuam rau cov khoom siv neeg kho kom zoo. Yog li ntawd, hauv cov ntawv thov siv, hom thiab noj tshuaj ntawm cellulose yuav tsum tau ua kom zoo thiab tsim raws li cov kev xav tau.
Cellulose ether cuam tshuam cov txheej txheem hydration thiab cov khoom siv ntawm cov khoom noj kom huv, thiab cuam tshuam rau cov khoom ntawm cov khoom siv dej. Txawm hais tias cov neeg hais ua cellulose yuav ua rau ib tug poob ntawm lub zog thaum ntxov, lawv tuaj yeem txhim kho lub durability thiab tawv ntawm cov pob zeb ua hauv lub sijhawm ntev. Qhov kev sib ntxiv ntawm cellulose ether tuaj yeem txhim kho kev tsim kho kev tsim kho, tshwj xeeb tshaj yog nyob rau lub sijhawm ua haujlwm ntev thiab muaj dej siab. Nws muaj irreplaceable zoo. Hauv cov ntawv thov engineering, kev xaiv tsim nyog ntawm hom thiab ntau npaum ntawm cellulose lub zog, kev tsim kho thiab durability cov khoom siv.
Lub Sijhawm Post: Sep-27-2024