Gypsum yog ib qho ntawm cov ntaub ntawv siv feem ntau tsis tsuas yog hauv kev tsim kho, tab sis kuj hauv kev kos duab, hauv kev kho hniav, hauv kev lag luam cov hniav nyiaj hniav kub, thiab lwm yam.
Qhov zoo ntawm cov khoom lag luam gypsum feem ntau yog txiav txim siab los ntawm kev xaiv ntawm gypsum hmoov thiab ua tib zoo saib xyuas rau thev naus laus zis los npaj qhov kev daws teeb meem. Nws yog qhov zoo heev los ua cov plaster nrum hauv tsev.
Cov khoom siv no tau siv txij li lub sijhawm puag thaum ub, ua ntej tsim tshuab thiab hluav taws xob. Txhua yam uas xav tau rau kev npaj yog qhuav gypsum thiab dej, ib lub taub ntim rau kev npaj qhov kev daws, spatula rau nplawm. Nws tseem zoo kom muaj cov nplua-ntxaij sieve (0.2-0.5 hli) rau sifting gypsum qhuav ua ntej npaj cov tshuaj. Tshiab gypsum ntawm cov khoom zoo nyob rau hauv nws cov thawj ntim tsis xav tau kev kuaj mob ua ntej. Rau kev ua qauv, tam sim no muaj ntau yam khoom siv ntawm kev muag, uas, ntxiv rau cov hmoov plaster, kuj muaj cov cuab yeej rau kev ua haujlwm nrog plaster.
Cov kev xav tau yooj yim rau cov txheej txheem ntawm kev tau txais cov tshuaj gypsum zoo ib yam rau txhua hom gypsum thiab cov hau kev kom tau txais kev daws - cov hmoov tau nchuav rau hauv dej, nplawm nrog spatula, zam kev tsim cov pa npuas hauv kev daws. Koj tuaj yeem nchuav nws rau hauv cov kwj nyias, thaum nplawm cov tshuaj (qhov no, ua npuas ncauj yuav tsim rau ntawm qhov chaw uas yuav tsum tau muab tshem tawm) los yog muab hliv rau hauv nruab nrab nrog lub pov toj thiab do nrog ib qho hnoos qeev nrog txiav kev txav sab hauv cov kua ntim, tsis muaj ntxiab huab cua thaum nplawm. Nyob hauv thaj chaw muaj kev lag luam, kev tshem tawm yog siv los tshem cua ntawm cov tshuaj.
Nws yog tsis yooj yim sua kom ncua cov txheej txheem ua noj ua haus, koj yuav tsum muaj sijhawm los ua cov plaster ua rau hauv 1-2 feeb. Lub sib xws yuav tsum yog tib yam li hnyav qab zib lossis qaub cream. Feem ntau, 1 kg hmoov yog nchuav rau hauv 0.7 liv dej. Cov kua ua kua ntau dhau yuav ua rau txo qis ntawm lub zog ntawm cov khoom, tuab heev - tsis zoo sau tag nrho cov ces kaum thiab kev ntseeg siab ntawm daim ntawv.
Qhuav gypsum tuaj yeem raug ntxiv rau qhov kev daws teeb meem kom tau qhov xav tau sib thooj, tab sis cov gypsum tsis tuaj yeem raug dej nrog dej. Tsis tas li, koj tsis tuaj yeem siv lub nkoj nrog cov seem ntawm seem dhau los ntawm gypsum los npaj cov tshuaj.
Ua raws li hom ntawm gypsum, txoj kev daws teeb meem nyob rau hauv ib lub sijhawm 5 mus rau 30 feeb, yog li koj yuav tsum sib xyaw nws rau hauv qhov me me, uas yuav siv rau hauv lub sijhawm tawv tawv. Nws yog qhov ua tau los ua haujlwm nrog txoj kev daws teeb meem thaum lub sijhawm pib txij li kev teeb tsa mus rau qhov nyuaj. Tom ntej no, cov khoom lag luam yuav tsum tau muab tso rau hauv chav sov kom qhuav. Tsawg kub muaj qhov cuam tshuam tsis zoo rau qhov zoo ntawm cov khoom lag luam plaster.
