HPMC (Hydroxypropyl Methylcellulose) yog cov khoom siv polymer feem ntau siv hauv cov tshuaj khib nyiab qhuav. Raws li ib tug multi-functional additive, nws plays ib tug tseem ceeb luag hauj lwm nyob rau hauv mortar.
1. Thickening tus neeg ua haujlwm ua haujlwm
HPMC muaj cov nyhuv thickening thiab tuaj yeem txhim kho qhov sib xws thiab kev tsim kho ntawm cov tshuaj khib nyiab qhuav. Los ntawm kev ntxiv HPMC, qhov viscosity ntawm cov mortar nce, tso cai rau cov mortar kom zoo dua rau ntawm qhov chaw ntawm lub substrate thiab tsis plam tawm yooj yim thaum siv. Cov nyhuv thickening kuj pab cov mortar tswj kev ua haujlwm zoo dua thaum lub sij hawm tsim kho, tshwj xeeb tshaj yog thaum tsim rau ntawm qhov chaw ntsug los yog ntawm qhov chaw siab, nws tuaj yeem txo qis qis.
2. Kev tuav dej ua haujlwm
HPMC muaj cov khoom tuav dej zoo heev thiab tuaj yeem txo cov evaporation ntawm cov dej thaum lub sij hawm hardening txheej txheem ntawm mortar. mortar nrog dej ruaj khov tuaj yeem ua kom muaj dej txaus ntawm cov cement thiab txhim kho nws lub zog. Tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, qhuav los yog dej-absorbent substrate tej yam kev mob, HPMC pab ncua lub sij hawm qhib ntawm lub mortar thiab tsis txhob muaj teeb meem xws li tawg thiab hmoov los ntawm cov dej noo ntau dhau. Tsis tas li ntawd, kev tuav dej zoo kuj tuaj yeem ua kom ntseeg tau tias cov tshuaj khib nyiab muaj kev ruaj ntseg zoo thaum siv mus ntev.
3. Txhim kho kev tsim kho
Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov tshuaj khib nyiab qhuav. Qhov no suav nrog txo lub sijhawm sib xyaw ntawm cov tshuaj khib nyiab, txhim kho nws qhov sib xws thiab ua kom yooj yim rau kev sib kis thiab siv. Nyob rau tib lub sijhawm, cov nyhuv lubrication ntawm HPMC tuaj yeem ua rau kev tsim kho kom zoo dua qub thiab txhim kho kev tsim kho kom zoo. Tsis tas li ntawd, vim hais tias nws muab cov mortar cohesion zoo dua, cov neeg ua haujlwm tsim kho tuaj yeem tuav cov mortar yooj yim dua, txhim kho kev tsim kho kom zoo.
4. Txhim kho sagging kuj
Anti-sag yog hais txog kev ua haujlwm ntawm mortar uas tsis yooj yim rau sag los yog plam thaum siv ntsug. Kev sib xyaw ua ke ntawm HPMC cov khoom nplaum thiab cov nyhuv thickening zoo txhim kho cov sag tsis kam ntawm cov tshuaj khib nyiab, tso cai rau cov mortar kom nyob ruaj khov thaum lub sij hawm phab ntsa los yog high-altitude tsim tsis ntws vim lub ntiajteb txawj nqus. Qhov no yog tshwj xeeb tshaj yog ib qho tseem ceeb rau kev tsim kho daim ntaub ntawv xws li pobzeb nplaum los yog plaster.
5. Ua kom zoo tshaj plaws npuas qauv
HPMC tuaj yeem txhim kho cov qauv npuas hauv cov khoom sib xyaw qhuav thiab ua kom cov npuas sib txawv ntau dua, yog li txhim kho qhov khov-thaw tsis kam thiab ua haujlwm ntev ntawm cov tshuaj khib. Kev qhia txog qhov tsim nyog ntawm huab cua npuas rau hauv lub mortar tuaj yeem pab txo qis qis ntawm cov tshuaj khib nyiab thiab txo qhov tshwm sim ntawm cov kab nrib pleb. Nws kuj tseem txhim kho cov dej tuav thiab kev ua haujlwm ntawm cov mortar. Cov qauv npuas tsis zoo kuj tuaj yeem txo qhov ntom ntawm cov mortar thiab txhim kho nws cov thermal thiab suab rwb thaiv tsev.
6. Ncua dej tshuaj tiv thaiv
HPMC tseem tuaj yeem ua rau txo qis cov tshuaj tiv thaiv dej ntawm cov cement, yog li txuas ntxiv lub sijhawm ua haujlwm ntawm cov tshuaj khib nyiab qhuav. Qhov no yog qhov zoo heev nyob rau hauv cov xwm txheej uas yuav tsum tau siv sijhawm ntev dua. Los ntawm kev ncua cov txheej txheem hydration, HPMC tso cai rau cov neeg ua haujlwm tsim kho lub sijhawm ntau dua los hloov kho thiab txiav, tiv thaiv kom tsis txhob muaj cov tshuaj khib nyiab sai los ntawm kev cuam tshuam kev tsim kho thiab kev ua haujlwm zoo.
7. Txhim kho qhov adhesion ntawm mortar
HPMC tuaj yeem txhim kho cov khoom sib txuas ntawm cov mortar thiab cov substrate, uas tso cai rau cov mortar kom muaj qhov adhesion zoo dua tom qab siv rau ntau qhov chaw substrate. Qhov no yog qhov tseem ceeb heev los txhim kho cov cuab yeej cuab tam ntawm mortar, tshwj xeeb tshaj yog tensile, compressive thiab shear zog. Enhanced adhesion tsis tsuas yog txhim kho kev tsim kho kom zoo, tab sis kuj txuas ntxiv kev pabcuam lub neej ntawm cov khoom siv hauv tsev.
8. Kho lub fluidity thiab lubrication ntawm mortar
Lub solubility ntawm HPMC nyob rau hauv mortar tso cai rau nws mus kho lub fluidity thiab lubricity ntawm lub mortar, ua rau lub mortar yooj yim dua thaum lub sij hawm tsim kho. Los ntawm kev kho qhov fluidity ntawm mortar, HPMC tsis tsuas yog txhim kho kev ua haujlwm ntawm cov mortar, tab sis kuj txo cov twj tso kua mis, uas tsim nyog rau kev tsim kho loj thiab kev tsim kho ntawm cov tsev siab siab.
9. Tiv thaiv mortar delamination thiab cais
HPMC tuaj yeem tiv thaiv kev sib cais lossis kev sib haum xeeb ntawm cov khoom xws li cov khoom sib xyaw zoo thiab cov cement hauv cov mortar, tswj qhov sib xws ntawm cov mortar, thiab tiv thaiv delamination thiab cais. Qhov no yog ib qho tseem ceeb heev los xyuas kom meej kev tsim kho kom zoo, tshwj xeeb tshaj yog nyob rau hauv kev tsim kho ntawm high-sawv vaj tse, qhov twg delamination thiab segregation yuav cuam tshuam rau qhov kawg structural zog thiab nto tiav.
10. Txhim kho cov kav ntev
Cov dej tuav cov nyhuv thiab kev txhim kho npuas ntawm HPMC tuaj yeem txhim kho lub zog ntawm cov tshuaj khib nyiab qhuav thiab txhim kho nws cov kev tiv thaiv rau ib puag ncig hnyav. Txawm hais tias nws yog qhov kub thiab txias, qhov kub thiab txias ib puag ncig, daim ntawv thov ntawm HPMC tuaj yeem ua kom ntseeg tau tias cov mortar tuav lub cev zoo thiab kev ruaj ntseg thaum siv mus sij hawm ntev, ncua kev pab cuam lub neej ntawm lub tsev.
11. Txo qhov kev pheej hmoo ntawm kev tawg
Los ntawm kev txhim kho cov dej tuav thiab lub zog ntawm cov mortar, HPMC tuaj yeem txo qhov kev ntxhov siab los ntawm kev poob dej sai thaum lub sij hawm ziab ntawm cov mortar thiab txo qhov kev pheej hmoo ntawm kev tawg. Tsis tas li ntawd, nws cov nyhuv thickening ua rau cov qauv ntawm cov mortar ruaj khov, ntxiv txo qhov tshwm sim ntawm cov kab nrib pleb. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau qee cov txheej txheem tsim kho uas yuav tsum tau muaj qhov tiaj tus thiab du (xws li plastering mortar, leveling txheej, thiab lwm yam).
HPMC plays lub luag hauj lwm ntawm ib tug multi-functional additive nyob rau hauv qhuav-mixed mortar thiab yog dav siv nyob rau hauv ntau yam mortar formulations nyob rau hauv kev tsim kho, kho kom zoo nkauj thiab lwm yam teb. Nws tuaj yeem tsis tsuas yog txhim kho cov dej tuav, sag tsis kam thiab ua haujlwm ntawm mortar, tab sis kuj ua kom zoo dua cov qauv npuas thiab txhim kho lub zog sib txuas thiab ua haujlwm ntawm mortar. Raws li kev tsim kho sib txawv, HPMC ntau txoj haujlwm ua kom ntseeg tau tias cov tshuaj khib nyiab qhuav muaj kev ua haujlwm zoo thiab ua haujlwm ntev, thiab yog ib qho tseem ceeb thiab tseem ceeb ntawm cov khoom siv hauv tsev niaj hnub.
Post lub sij hawm: Oct-18-2024