1. Cov teeb meem tshwm sim hauv cov hmoov putty
Kev ziab sai: Qhov no feem ntau yog vim muaj cov hmoov calcium ntxiv (loj dhau, qhov ntau ntawm cov hmoov calcium siv hauv cov mis putty tuaj yeem txo qis) muaj feem cuam tshuam nrog tus nqi khaws dej ntawm cov fiber, thiab nws kuj muaj feem cuam tshuam nrog qhov qhuav ntawm phab ntsa.
Tev thiab dov. Qhov no muaj feem cuam tshuam nrog tus nqi khaws dej, uas yooj yim tshwm sim thaum qhov viscosity ntawm cellulose qis lossis qhov ntau ntxiv yog me me.
Kev tshem tawm cov hmoov putty sab hauv phab ntsa: Qhov no muaj feem cuam tshuam nrog qhov ntau ntawm cov hmoov calcium tshauv ntxiv (qhov ntau ntawm cov hmoov calcium tshauv hauv cov mis putty me dhau lossis qhov huv ntawm cov hmoov calcium tshauv qis dhau, thiab qhov ntau ntawm cov hmoov calcium tshauv hauv cov mis hmoov putty yuav tsum tau nce ntxiv kom tsim nyog) Tib lub sijhawm, nws kuj muaj feem cuam tshuam nrog qhov ntau thiab zoo ntawm cellulose, uas tau cuam tshuam rau hauv qhov ceev ntawm cov khoom. Qhov ceev ntawm cov dej khaws cia qis, thiab lub sijhawm rau cov hmoov calcium tshauv (calcium oxide hauv cov hmoov calcium tshauv tsis hloov pauv tag nrho rau calcium hydroxide) tsis txaus. ,ua rau.
Kev tawg ua tej daim me me: Qhov no muaj feem cuam tshuam nrog qhov av noo qhuav thiab qhov tiaj tiaj ntawm phab ntsa, thiab nws kuj muaj feem cuam tshuam nrog kev tsim kho.
Cov ntsiab lus tshwm sim. Qhov no muaj feem cuam tshuam nrog cellulose, uas muaj cov khoom tsis zoo uas tsim cov zaj duab xis. Tib lub sijhawm, cov khoom tsis huv hauv cellulose ua rau me ntsis nrog cov tshauv calcium. Yog tias qhov kev ua xua hnyav, cov hmoov putty yuav tshwm sim hauv lub xeev ntawm cov taum pauv curd residue. Nws tsis tuaj yeem muab tso rau ntawm phab ntsa, thiab nws tsis muaj lub zog sib koom ua ke tib lub sijhawm. Tsis tas li ntawd, qhov xwm txheej no kuj tshwm sim nrog cov khoom xws li carboxymethyl sib xyaw nrog cellulose.
Cov tsos ntawm cov qhov av thiab cov qhov pinholes: Qhov no yog qhov tseeb cuam tshuam nrog qhov dej ntawm qhov dej hydroxypropyl methylcellulose aqueous solution. Qhov dej ntawm lub rooj sib zog ntawm hydroxyethyl aqueous solution tsis pom tseeb. Nws yuav zoo rau kev kho kom tiav.
Tom qab cov putty qhuav lawm, nws yooj yim tawg thiab tig daj: qhov no yog cuam tshuam nrog kev ntxiv ntau ntawm cov hmoov calcium tshauv. Yog tias cov hmoov calcium tshauv ntau dhau, qhov nyuaj ntawm cov hmoov putty yuav nce ntxiv tom qab ziab. Tsuas yog qhov nyuaj tsis muaj kev ywj pheej yuav yooj yim tawg, tshwj xeeb tshaj yog Nws yooj yim tawg thaum raug lub zog sab nraud. Nws kuj tseem cuam tshuam nrog cov ntsiab lus siab ntawm calcium oxide hauv cov hmoov calcium tshauv.
2. Vim li cas cov hmoov putty thiaj li nyias dua tom qab ntxiv dej?
Cellulose siv ua ib yam khoom ua kom tuab thiab khaws dej hauv cov putty. Vim yog thixotropy ntawm cellulose nws tus kheej, qhov ntxiv ntawm cellulose hauv cov hmoov putty kuj ua rau thixotropy tom qab ntxiv dej rau hauv cov putty. Qhov thixotropy no yog tshwm sim los ntawm kev puas tsuaj ntawm cov qauv sib xyaw ua ke ntawm cov khoom hauv cov hmoov putty. Cov qauv no tshwm sim thaum so thiab tawg thaum muaj kev ntxhov siab. Uas yog hais tias, qhov viscosity txo qis thaum do, thiab qhov viscosity rov qab los thaum sawv ntsug.
3. Vim li cas cov putty thiaj hnyav heev thaum lub sijhawm khawb?
Hauv qhov no, qhov viscosity ntawm cov cellulose feem ntau siv yog siab dhau. Qee cov chaw tsim khoom siv 200,000 cellulose los ua putty. Cov putty tsim tawm hauv txoj kev no muaj viscosity siab, yog li nws zoo li hnyav thaum khawb. Qhov ntau npaum li cas pom zoo ntawm putty rau phab ntsa sab hauv yog 3-5 kg, thiab viscosity yog 80,000-100,000.
4. Vim li cas cov cellulose viscosity zoo sib txawv thaum lub caij ntuj no thiab lub caij ntuj sov?
Vim yog qhov kub ntawm cov khoom, qhov viscosity ntawm cov putty thiab mortar yuav maj mam txo qis nrog qhov kub nce. Thaum qhov kub tshaj qhov kub ntawm cov khoom gel, cov khoom yuav raug precipitated los ntawm dej thiab poob nws cov viscosity. Qhov kub hauv chav tsev feem ntau yog siab dua 30 degrees, uas txawv ntawm qhov kub hauv lub caij ntuj no, yog li qhov viscosity qis dua. Nws raug pom zoo kom xaiv cov khoom nrog viscosity siab dua thaum siv cov khoom thaum lub caij ntuj sov, lossis kom nce qhov ntau ntawm cellulose, thiab xaiv cov khoom nrog qhov kub ntawm gel siab dua. Sim tsis txhob siv methyl cellulose thaum lub caij ntuj sov. Qhov kub ntawm gel yog nruab nrab ntawm Kwv yees li 55 degrees, qhov kub siab dua me ntsis, thiab nws cov viscosity yuav raug cuam tshuam loj heev.
Lub sijhawm tshaj tawm: Plaub Hlis-13-2023