Hydroxyethylmethylcellulose (HEMC) yog ib qho uas tsis yog-ionic cellulose ether dav siv nyob rau hauv kev tsim mortars, tshwj xeeb tshaj yog nyob rau hauv qhuav-mix mortars, plastering mortars, self-leveling mortars thiab pobzeb adhesives. Nws cov txiaj ntsig tseem ceeb yog cuam tshuam los ntawm kev txhim kho kev ua haujlwm ntawm mortar, txhim kho cov khoom siv kho tshuab thiab txhim kho kev tsim kho.
1. Txhim kho cov dej tuav ntawm mortar
HEMC muaj cov khoom tuav dej zoo, uas yog qhov tseem ceeb hauv kev siv tshuaj khib nyiab. Txij li cov cement yuav tsum muaj dej txaus thaum lub sij hawm hardening txheej txheem, thiab qhov chaw tsim kho ib puag ncig feem ntau qhuav, dej yog yooj yim rau evaporate, tshwj xeeb tshaj yog nyob rau hauv kub los yog cua. HEMC tuaj yeem txo cov dej tsis zoo thiab ua kom muaj dej txaus ntawm cov cement, yog li txhim kho lub zog thiab kev sib txuas ntawm cov mortar. Nyob rau tib lub sijhawm, kev tuav dej zoo kuj tseem pab kom tsis txhob muaj cov kab nrib pleb hauv cov mortar thiab txhim kho kev tsim kho kom zoo.
2. Txhim kho kev ua haujlwm ntawm mortar
HEMC tuaj yeem txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm cov tshuaj khib nyiab, ua kom yooj yim rau kev thov thiab qib. Tom qab ntxiv qhov tsim nyog ntawm HEMC rau hauv mortar, lubricity thiab slipperiness ntawm mortar tuaj yeem txhim kho, tso cai rau cov neeg ua haujlwm ua haujlwm yooj yim dua thiab txhim kho kev ua haujlwm. Tsis tas li ntawd, HEMC tseem tuaj yeem txuas ntxiv lub sijhawm qhib ntawm mortar, tso cai rau cov neeg ua haujlwm kho cov ntaub ntawv tsim kho kom yooj yim dua nyob rau hauv qee lub sijhawm, yog li txhim kho kev tsim kho.
3. Txhim kho qhov adhesion ntawm mortar
Kev sib koom ua ke ntawm mortar yog ib qho tseem ceeb qhia kom ntseeg tau tias kev tsim kho zoo. HEMC tuaj yeem txhim kho lub zog sib txuas ntawm cov mortar thiab cov khoom siv hauv paus, yog li txhim kho qhov kev ua tau zoo ntawm cov tshuaj khib. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov ntawv thov xws li pobzeb nplaum thiab cov thermal rwb thaiv tsev mortar, vim nws tuaj yeem zam cov teeb meem xws li hollowing thiab ntog vim tsis txaus adhesion.
4. Txhim kho cov nplaum tiv thaiv ntawm mortar
Thaum lub sij hawm cov txheej txheem ceramic pobzeb tso, kev tiv thaiv kev ua haujlwm yog qhov tseem ceeb, tshwj xeeb tshaj yog rau cov vuas luaj ceramic lossis phab ntsa. HEMC tuaj yeem txhim kho qhov kev tiv thaiv kev ua haujlwm zoo los ntawm kev kho cov viscosity thiab sib xws ntawm cov tshuaj khib nyiab, kom ntseeg tau tias cov vuas luaj ceramic tau ruaj khov txuas rau lub hauv paus nto hauv thawj theem yam tsis muaj kev hloov pauv. Cov yam ntxwv no tshwj xeeb yog qhov tseem ceeb rau kev tsim kho ntsug.
5. Txhim kho qhov tawg tsis kam thiab yoog raws ntawm mortar
HEMC tuaj yeem txhim kho qhov yooj thiab tawg tsis kam ntawm mortar rau qee yam. Nws cov dej tuav thiab rheology optimize cov kev ntxhov siab nyob rau hauv lub mortar thiab txo qhov kev pheej hmoo ntawm tawg los ntawm qhuav shrinkage thiab kub sib txawv. Tsis tas li ntawd, nyob rau hauv ib puag ncig tshwj xeeb, xws li sab nraum zoov qhov kub thiab txias, qhov sib ntxiv ntawm HEMC tuaj yeem hloov kho qhov kub thiab txias thiab txuas ntxiv lub neej kev pab cuam ntawm mortar.
6. Txhim kho qhov kev ua tau zoo ntawm tus kheej
Nyob rau hauv tus kheej-leveling mortars, rheological hloov cov nyhuv ntawm HEMC yog tshwj xeeb tshaj yog tseem ceeb. Nws cov thickening zoo heev thiab rheology tswj muaj peev xwm ua kom lub mortar mus rau theem nws tus kheej thaum lub sij hawm tsim kho kom zoo nkauj thiab tiaj tus nto, thaum tsis txhob delamination los yog kev sib hais haum thiab txhim kho tag nrho cov zoo ntawm pem teb kev tsim kho.
7. Kev lag luam thiab ib puag ncig tus phooj ywg
Txawm hais tias HEMC yog ib qho khoom siv tau zoo heev, qhov ntau npaum li cas feem ntau me me thiab yog li ntawd tsis ua rau tus nqi ntawm cov tshuaj khib. Tsis tas li ntawd, HEMC nws tus kheej tsis muaj tshuaj lom thiab tsis muaj mob, tsis muaj cov hlau hnyav lossis cov organic tsis sib haum xeeb (VOC), thiab ua tau raws li kev tiv thaiv ib puag ncig ntsuab. Qhov no ua rau nws zoo tagnrho rau kev ruaj ntseg hauv kev tsim kho kev lag luam.
Hydroxyethylmethylcellulose muaj ntau yam kev ua tau zoo hauv mortar thiab tuaj yeem txhim kho cov khoom tseem ceeb xws li dej tuav, kev ua haujlwm, adhesion thiab tawg tsis kam ntawm mortar. Cov yam ntxwv no tsis tsuas yog txhim kho kev tsim kho kom zoo thiab qhov project zoo, tab sis kuj txo cov kev pheej hmoo thiab cov nqi kho mob thaum lub sij hawm tsim kho. Yog li ntawd, HEMC muaj dav daim ntawv thov kev cia siab nyob rau hauv niaj hnub tsev cov ntaub ntawv thiab tau dhau los ua ib tug indispensable thiab tseem ceeb additive.
Post lub sij hawm: Nov-11-2024