1. Cov teeb meem tshwm sim hauv cov hmoov putty
Qhuav sai:
Qhov laj thawj tseem ceeb yog tias qhov ntau ntawm cov hmoov tshauv calcium ntxiv (loj dhau, qhov ntau ntawm cov hmoov tshauv calcium siv rau hauv cov mis putty tuaj yeem txo qis kom raug) muaj feem cuam tshuam nrog tus nqi khaws dej ntawm cov fiber, thiab kuj muaj feem cuam tshuam nrog qhov qhuav ntawm phab ntsa.
Tev thiab dov:
Nws muaj feem cuam tshuam nrog tus nqi khaws dej, thiab qhov viscosity qis ntawm cellulose yog qhov ua rau muaj qhov xwm txheej no lossis qhov ntau ntxiv yog me me.
Kev tshem tawm cov hmoov av ntawm phab ntsa sab hauv:
Tus nqi ntawm cov hmoov tshauv calcium ntxiv (tus nqi ntawm cov hmoov tshauv calcium hauv cov mis putty me dhau lossis qhov huv ntawm cov hmoov tshauv calcium qis dhau, thiab tus nqi ntawm cov hmoov tshauv calcium hauv cov mis hmoov putty yuav tsum tau nce ntxiv kom tsim nyog), thiab nws kuj muaj feem cuam tshuam nrog tus nqi ntawm cellulose thiab qhov zoo muaj feem cuam tshuam, uas yog cuam tshuam rau hauv tus nqi khaws cia dej ntawm cov khoom. Tus nqi khaws cia dej qis, thiab cov hmoov tshauv calcium (cov calcium oxide hauv cov hmoov tshauv calcium tsis hloov pauv tag nrho rau calcium hydroxide rau hydration) tsis txaus lub sijhawm, uas yog ua rau.
Ua npuas dej:
Qhov av noo qhuav ntawm phab ntsa muaj feem cuam tshuam nrog qhov tiaj tus, thiab nws kuj muaj feem cuam tshuam nrog kev tsim kho.
Ib qho chaw qhia meej tshwm sim:
Nws muaj feem cuam tshuam nrog cellulose, nws cov khoom tsim zaj duab xis tsis zoo, thiab tib lub sijhawm, cov khoom tsis huv hauv cellulose react me ntsis nrog tshauv calcium. Yog tias qhov tshuaj tiv thaiv 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.
Tom qab cov putty qhuav lawm, nws yooj yim tawg thiab tig daj:
Nws muaj feem cuam tshuam nrog kev ntxiv ntau 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 yooj yim tawg, tshwj xeeb tshaj yog thaum nws raug lub zog sab nraud. Nws kuj muaj feem 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 rau ntawm 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 txuas ntawm 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 tias thaum lub caij ntuj sov, sim xaiv cov khoom uas muaj viscosity siab dua thaum siv cov khoom, lossis nce cov cellulose ntau ntxiv.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-30-2022