Kev siv nyiaj txiag ntawm tus kheej yog siv dav nyob rau hauv kev tsim kho kev tsim kho qib thiab du thaj chaw ua ntej txhim kho pem teb npog xws li cov vuas, ntaub pua plag lossis ntoo. Cov neeg muaj tshoob no muab ob peb qhov zoo tshaj plaws cov kev ua kom sib txawv, suav nrog kev yooj yim ntawm daim ntawv thov, kom qhuav nrawm thiab txhim kho nto tiav. HydroxyPropyyl methylcellose (HPMC) yog qhov tseem ceeb hauv kev ua kom tuag taus vim nws muaj peev xwm hloov kho rhuaology, txhim kho cov kev ua haujlwm zoo thiab txhim kho adhesion.
Cov khoom xyaw tseem ceeb
1. HydroxyprropylardMethylcelleculose (HPMC)
HPMC yog lub cellulose derivative feem ntau siv nyob rau hauv cov khoom tsim kho raws li cov tuab, binder thiab dej tuav tus neeg sawv cev. Hauv kev coj tus kheej, HPMC ua raws li kev hloov kho rheology, txhim kho cov khoom thiab tiv thaiv kab mob sib cais. Qhov kev xaiv ntawm HPMC qib yuav cuam tshuam rau viscosity thiab cov khoom ntawm lub cug.
2. Maas
Maas yog lub ntsiab lus tseem ceeb hauv kev sib nphoo ntawm tus kheej. Cov Portland Mem plab Mement (OPC) feem ntau siv vim nws muaj thiab sib xyaw nrog lwm cov khoom xyaw. Qhov zoo thiab particle loj muab faib tawm ntawm cov xis yog ib qho muaj zog thiab teeb cov yam ntxwv ntawm lub cug.
3. Kev sib sau ua ke
Kev sib sau ua ke zoo xws li xuab zeb tau ntxiv rau ntawm qhov sib tov sib tov los txhim kho nws cov cuab yeej cuab tam, suav nrog lub zog thiab lub zog. Lub particle loj rau kev sib sau ua ke cuam tshuam rau cov fluidity thiab nto tas ntawm lub cug.
4. Ntxiv
Ntau yam kev sib ntxiv tuaj yeem suav nrog hauv cov kab hlau ua haujlwm los txhim kho cov khoom tshwj xeeb xws li teeb tsa lub sijhawm, kev ua yeeb yam thiab dej khaws cia. Cov tshuaj ntxiv no suav nrog superplasticizers, huab cua entraining cov neeg sawv cev thiab coagulants.
Daim ntawv qhia ntawv
1. Viscosity tswj
Ua tiav qis viscosity yog ib qho tseem ceeb rau kev siv nyiaj txiag ntawm tus kheej kom ntseeg tau tias tsis yooj yim ntawm daim ntawv thov thiab cov kev ntws tawm ntawm lub substrate. Cov kev xaiv HPMC, kev siv tshuaj HPMC, kev faib tawm ntawm qhov loj me faib ua si lub luag haujlwm tseem ceeb hauv kev tswj viscosity. Tsis tas li ntawd, kev siv cov superplasticizers tuaj yeem ntxiv cov viscosity yam tsis cuam tshuam lwm yam.
2. Teem lub sijhawm
Lub sijhawm ntsuas lub sijhawm yog qhov tseem ceeb kom tso cai rau lub sijhawm txaus rau kev thov thiab qib kev txhim kho kom ncav cuag thiab lub zog kev txhim kho kom ncav sijhawm. Teem sijhawm tuaj yeem hloov kho los ntawm kev hloov pauv ntawm cov cement rau dej, ntxiv cov nrawm dua lossis rov ua kom sov.
3. Flow yam ntxwv
Lub flasability ntawm tus kheej-leveling cug yog qhov tseem ceeb rau kev ua tiav txawm tias kev pab saum npoo thiab kev ua tiav. Tsim kom muaj kev sib koom ua ke, kev kho kom zoo-kev hloov kho cov lus tseeb thiab rheology kho mob xws li HPMC kev pab ua tiav cov yam ntxwv uas xav tau. Kev saib xyuas yuav tsum tau coj mus rau kom tsis txhob los ntshav ntau dhau los yog cais thaum siv.
4. Adhesion thiab Tsevneeg Lub Zog
Zoo adhesion mus rau lub substrate yog qhov tsim nyog los tiv thaiv delamination thiab kom cov sijhawm ntev. Cov khoom lag luam nplaum, xws li HPMC, tuaj yeem txhim kho txoj kev sib khi ntawm cov kab tshuaj khib thiab txheej av substrate. Kev npaj kom zoo, suav nrog kev ntxuav thiab ua ntej pib, tuaj yeem txhim kho adhesion.
Cov txheej txheem tsim khoom
Kev npaj ntawm qis-viscosity HPMC tus kheej txoj kev khib nyiab cuam tshuam nrog ntau kauj ruam xws li batching, tov, thiab kev tsim kho. Ntawm no yog ib qho dav dav ntawm kev tsim khoom lag luam:
1. Cov khoom xyaw
Kev ntsuas thiab ntsuas qhov uas xav tau ntau ntawm Maas, kev sib sau ua ke, HPMC thiab lwm yam kev sib ntxiv raws li cov ntawv qhia ua ntej.
Ua kom ntseeg tau tias muaj cov khoom xyaw muaj kuab kom muaj kuab tshuaj khib thiab ua haujlwm.
2. Sib tov
Sib tov cov khoom xyaw qhuav (xis mas, kev sib sau ua ke) hauv cov hlab ntsha haum.
Maj mam ntxiv dej thaum sib xyaw kom ua tiav qhov xav tau.
Qhia HPMC hmoov rau hauv qhov sib xyaw kom zoo ua kom tiav thiab dej kom huv.
Sib tov kom huv si kom txog thaum lub homogeneous cug muab tshuaj txhuam ntawm cov viscosity qis yog tau txais.
Kho cov sib tov raws li xav tau kom ua tau raws li cov cai tshwj xeeb rau cov Flowabilability thiab teeb sijhawm.
3. Thov
Npaj lub substrate los ntawm kev ntxuav, ua ntej, thiab leveling raws li xav tau.
Ncuav tus kheej txoj kev khib nyiab mus rau sab saum npoo av.
Siv cov cuab yeej thov lossis cov tshuab nqus tsheb mus faib lub tshuaj cug dua ntawm tag nrho thaj chaw.
Tso cai rau lub colle ua rau tus kheej thiab tshem tawm cov cua hauv los ntawm vibrating lossis troweling.
Saib xyuas tus txheej txheem kho kom zoo thiab tiv thaiv cov tshuaj khib nyiab tshiab ntawm cov dej noo ntau dhau los yog kev puas tsuaj tshuab.
Npaj qhov tsis muaj viscosity HPMC tus kheej txoj kev siv tshuaj ntsiav yuav tsum tau xaiv cov kev xaiv ntawm cov txheej txheem, kev sib txawv ntawm cov txheej txheem. Los ntawm kev tswj viscosity, teeb lub sij hawm, ntws cov yam ntxwv thiab cov khoom lag luam, cov chaw tsim khoom tuaj yeem tsim cov neeg txawj ntse mus txog qhov yuav tsum tau ua ib qho kev cai. Cov txheej txheem kev tsim kho kom tsim nyog thiab cov txheej txheem kho tau yog qhov tseem ceeb kom tau txais qhov zoo, ruaj khov ua kom tiav rau ntau yam kev tsim kho cov phiaj xwm.
Lub Sijhawm Post: Feb-19-2025