1. Cov teeb meem tshwm sim hauv cov hmoov putty
Qhuav sai. Qhov no feem ntau yog vim tias qhov ntau ntawm cov hmoov calcium tshauv ntxiv (loj dhau, qhov ntau ntawm cov hmoov calcium tshauv siv hauv cov mis putty tuaj yeem txo qis kom haum) 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 cov hmoov av ntawm cov hmoov putty sab hauv phab ntsa. Qhov no yog hais txog 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), thiab nws kuj yog hais txog qhov ntxiv ntawm cellulose. Muaj kev sib raug zoo ntawm qhov ntau thiab zoo, uas pom tau hauv qhov ceev ntawm cov khoom. Qhov ceev ntawm cov dej khaws cia qis, thiab cov hmoov calcium tshauv (cov calcium oxide hauv cov hmoov calcium tshauv tsis hloov pauv tag nrho mus rau calcium hydroxide rau hydration) lub sijhawm tsis txaus, uas yog vim li cas.
npuas. Qhov no muaj feem cuam tshuam nrog qhov qhuav av noo 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 qhov av thiab cov qhov me me tshwm sim. Qhov no pom tseeb tias muaj feem 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 tshauv-calcium. Yog tias ntxiv ntau dhau ntawm cov hmoov tshauv-calcium, qhov nyuaj ntawm cov hmoov putty yuav nce ntxiv tom qab ziab. Yog tias cov hmoov putty tsis muaj kev ywj pheej, nws yuav tawg yooj yim, tshwj xeeb tshaj yog thaum nws raug lub zog sab nraud. Nws kuj tseem cuam tshuam nrog cov ntsiab lus siab ntawm calcium oxide hauv cov hmoov tshauv calcium.
2. Vim li cas cov hmoov putty thiaj li nyias dua tom qab ntxiv dej?
Cellulose siv ua tus neeg 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 hauv qab 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 rau 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 uas muaj viscosity siab dua thaum siv cov khoom thaum lub caij ntuj sov, lossis kom nce cov cellulose, thiab xaiv cov khoom uas muaj qhov kub ntawm gel siab dua. Sim tsis txhob siv methyl cellulose thaum lub caij ntuj sov. Qhov kub ntawm gel yog nyob nruab nrab ntawm 55 degrees, yog tias qhov kub siab dua me ntsis, nws cov viscosity yuav raug cuam tshuam loj heev.
Lub sijhawm tshaj tawm: Lub Peb Hlis-22-2023