HydroxyPropyyl methylulose (HPMC) yog cov neeg tsis muaj ntaub ntawv no ete cov ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv cug cug.
1. Txhim kho dej ua ke
Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC hauv coll cug yog txhawm rau txhim kho nws cov dej khaws cia. Yog tias cov dej hauv txoj cai xis li sai, nws yuav ua rau muaj kev noj qab haus huv tsis txaus, yog li cuam tshuam lub zog thiab kev sib khi ntawm lub tshuaj khib. HPMC tuaj yeem "kaw" cov dej lwg me me los ntawm nws cov dej hauv hydrophilicity, yog li kev ncua dej evaporation thiab ua rau cov dej ntws evaporate hauv cov cemement ua tiav. Cov dej zoo khaws cia tsis tsuas yog ua kom tau lub zog thaum ntxov ntawm cug, tab sis kuj tseem zoo tiv thaiv qhuav shrinkage cracks.
Dej khaws cia yog qhov tshwj xeeb tshaj yog nyob hauv ib puag ncig qhuav lossis qhuav. HPMC tuaj yeem tsim cov yeeb yaj kiab tuab ntawm cov npoo av qhuav los tiv thaiv kom tsis txhob muaj cov khoom siv noo noo, yog li ua kom cov khoom siv kev tsim kho hauv thawj theem.
2. Txhim Kho Kev Ua Haujlwm
HPMC muaj cov nyhuv tuab tuab tuab thiab tuaj yeem txhim kho viscosity thiab cov haujlwm ua haujlwm ntawm xis mas cug. Thaum lub sij hawm tsim kho, yog tias cov ceel cort muaj fluidity tsis zoo, nws yog qhov tsis txaus ntseeg, nws yog tus swb, thiab lwm yam, yog li cuam tshuam rau cov khoom tsim tau zoo. HPMC tuaj yeem nce viscosity ntawm cement cort ua nws muaj cov khoom siv los tiv thaiv zoo. Txawm tias thaum tsim ntawm ib sab ntsug, nws tuaj yeem ua kom ntseeg tau tias lub tshuaj khib yog tusyees cohly coated thiab nyuaj rau xaub.
HPMC kuj tseem tuaj yeem ua kom cov qauv tshuaj khib nyiab ntau dua thiab niaj hnub ua kom zoo nkauj thiab ua haujlwm tsim kho kom zoo dua hauv plastering thiab leveling ua haujlwm.
3. Txhim kho lub zog bonding
HPMC tuaj yeem txhim kho txoj kev sib sau ua lub zog ntawm xis mas cug. Kev sib koom ua lub zog ntawm cov shoas cort yog ib qho ntawm nws cov khoom ua haujlwm tseem ceeb, sab nraud phab ntsa rwb thaiv tsev tshuab thiab lwm lub sijhawm uas xav tau kev ua neeg sib raug zoo dua. HPMC txhim kho kev sib xyaw ntawm cov tshuaj khib nyiab kom cov Maas hais tau zoo dua thiab sib khi ua kom zoo dua qub, yog li kev txhim kho cov nplaum nplaum tag nrho.
Cov zog sib cog lus zoo tuaj yeem tsis tsuas txhim kho kev rub tawm ntawm cov vuas cug, tab sis kuj tseem ua kom muaj kev tiv thaiv phab ceramic los tiv thaiv thaum siv, thiab txhim kho cov txheej txheem kev ruaj ntseg ntawm lub tsev.
4. Ncua Sijhawm Qhib
Lub sijhawm qhib qhib yog hais txog lub sijhawm uas xis mas cug tseem ua haujlwm tom qab kev tsim kho. Rau cov neeg ua haujlwm tsim khoom, kev hloov kho kom zoo rau lub tshuaj cug yuav pab txhim kho kev tsim kho, tshwj xeeb yog cov txheej txheem kev tsim kho loj. HPMC tuaj yeem txuas lub sijhawm qhib ntawm cov neeg ua haujlwm tig los ua haujlwm tau yooj yim rau kev ua tsis tiav ntawm cov dej cug.
Hauv kev tsim kho, HPMC ua kom muaj kev sib txuas ntawm cov xis thiab txuas ntxiv lub sijhawm ua haujlwm ntawm kev siv cov dej evaporation, uas txhim kho kev ua haujlwm ntawm kev tsim kho kom muaj qee yam.
5. Txhim kho kev tawg
HPMC tseem tuaj yeem txhim kho qhov raug tshem tawm ntawm cov cement. Caas cug yuav muaj kev ntim shrinkage thaum lub sijhawm ua kom tawv nqaij tawv. Tshwj xeeb tshaj yog yog tias noo noo yog ploj dhau nyob rau hauv thaum ntxov, shrinkage cracks tuaj yeem yooj yim tshwm sim, cuam tshuam rau cov tsos thiab ruaj khov ntawm lub tsev. HPMC ua tau zoo txo qhov tshwm sim ntawm cov shrinkage qhuav los ntawm kev txhim kho cov av noo thiab kub thaum lub sij hawm ua kom tawv nqaij tawv.
6. Tiv thaiv kev cais thiab los ntshav
Nyob rau hauv centa cug, yog noo noo thiab cov khoom sib cais, nws yuav cuam tshuam rau cov teeb meem los ntshav thiab cais, uas muaj kev sib xyaw ntawm lub cug. HPMC tuaj yeem tiv thaiv cov tshwm sim no los ntawm kev sib raug zoo ntawm cov nplais nqaij, kom tsis txhob muaj ntshav qab zib, tsis txhob ua kom khov kho, thiab ua kom muaj kev sib xyaw kom huv si tom qab kev tsim kho.
7. Txhim khu Frost Kuj
HPMC kuj muaj qee cov nyhuv ntawm kev txhim kho cov nplooj khov ua ntawm cov cement cort. Nyob rau hauv ib puag ncig txias, noo noo nyob rau hauv lub xis mas cult yuav khov, ua rau cov khoom kom nthuav dav hauv ntim thiab tawg. Los ntawm kev txhim kho lub compactive thiab dej ceev ntawm cug, HPMC tuaj yeem txo cov dej sab hauv, yog li kev txhim kho lub cug tshuaj khib nyiab ua kom khov-thaw mus.
8. Txhim kho corrosion tsis kam
HPMC kuj tseem tuaj yeem muaj qee yam cuam tshuam rau kev corrosion tsis kam ntawm cement cug. Los ntawm kev txhim kho lub compactness ntawm cement corrosive sab nraud media media tawm cov qauv siv durability ntawm xis los cem nws lub neej.
9. Txhim Kho Lub Zog Compressive
HPMC txhim kho cov kev hloov dej ntawm cov txiv ntseej los ntawm kev faib tawm cov dej hiav txwv event, uas txhim kho lub zog compressive ntawm lub cug rau ib yam. Txawm hais tias HPMC nws tus kheej tsis tuaj yeem koom nrog txoj kev siv tshuaj cug, nws muaj peev xwm ua kom cov qauv siv hluav taws xob ntau dua tom qab tawv me ntsis tom qab tawv dua, yog li txhim kho nws cov khoom siv tshuab tag nrho.
Lub luag haujlwm ntawm hydroxypropylulose nyob rau hauv xis mas cug ua haujlwm, txhim kho lub sijhawm ua haujlwm, txhim kho lub sijhawm qhib thiab kev tiv thaiv kab mob sib cais. Cov yam ntxwv no ua HPMC ib qho tsis tseem ceeb ntxiv hauv cov xis tsw. Nws cov nyhuv hloov kho tshwj xeeb yog qhov tshwj xeeb tshaj yog muaj feem ntau nyob hauv ib puag ncig zoo xws li qhuav, kub, thiab txias. Yog li ntawd, kev siv hluav taws xob muaj zog ntawm HPMC tuaj yeem txhim kho kev tsim kho kev tsim kho thiab cov tsis zoo ntawm xis los tseem ceeb rau kev ua haujlwm ntawm cov ntaub ntawv tsim tsev.
Lub Sijhawm Post: Feb-17-2025