Cement-raws li pobzeb nplaum yog siv dav hauv kev tsim vaj tsev thiab sab hauv. Lawv yog siv los ruaj ntseg pobzeb rau phab ntsa, pem teb, thiab lwm qhov chaw. Cov nplaum nplaum no muaj cov khoom tseem ceeb uas ua rau lawv zoo dua: hydroxypropyl methylcellulose (HPMC).
HPMC yog hloov kho cellulose polymer nrog ntau daim ntawv thov kev lag luam. Hauv cov nplais nplaum, nws yog siv los ua cov thickener, dej tuav tus neeg sawv cev thiab cov nplaum. Nws yog cov hmoov dawb los yog dawb dawb, tsis muaj tshuaj lom, tsis muaj ntxhiab thiab tsis qab.
Thaum ntxiv rau cov cement-raws li cov nplaum nplaum, nws qhov kev ua tau zoo tuaj yeem txhim kho ntau txoj hauv kev. Nov yog qee qhov laj thawj vim li cas HPMC yog ib qho tseem ceeb muaj nyob rau hauv cementitious tile adhesives:
1) Muab kev txhim kho kev ua haujlwm
HPMC txhim kho kev ua haujlwm tau zoo los ntawm kev ua cov pobzeb cementitious nplaum yooj yim rau kev thov thiab sib kis. HPMC ua kom cov viscosity ntawm cov nplaum, ua rau nws yooj yim dua thiab ua haujlwm nrog. Nws kuj txo qis sagging, uas yog thaum cov nplaum khiav los yog drips los ntawm qhov chaw.
2) Txhim khu kev tuav dej
Cementitious pobzeb adhesives yooj yim poob noo noo rau lub substrate nws yog siv rau. HPMC pab ua kom cov dej tuav ntawm cov nplaum, uas yog qhov tseem ceeb rau kev kho kom zoo ntawm cov nplaum. Qhov no ua kom ntseeg tau tias cov nplaum nplaum muaj lub neej ntev thiab tuaj yeem tiv taus cov av noo, cua sov thiab lwm yam khoom ib puag ncig. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum cov pobzeb tau teeb tsa hauv cov chaw ntub dej xws li chav dej thiab chav ua noj.
3) Nws muaj adhesion zoo dua
HPMC yog cov nplaum nplaum zoo uas txhim kho kev sib raug zoo ntawm cov cement-raws li cov nplaum nplaum. Thaum ntxiv rau cov nplaum, nws pab khi cov cement thiab lwm yam khoom ntawm cov nplaum ua ke, ua kom nws zoo dua ntawm kev tuav cov pobzeb thiab lwm yam ntaub ntawv rau lub substrate.
4) Txo cov kab nrib pleb
Kev tawg yog ib qho teeb meem feem ntau nrog cov cement-raws li cov nplaum nplaum. HPMC tuaj yeem pab txo qhov tawg los ntawm kev ua kom yooj yim ntawm cov nplaum thiab txo qhov shrinkage. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum cov pobzeb tau muab tso rau ntawm cov txheej txheem tshem tau yooj yim xws li ntoo lossis hlau.
5) Txhim kho durability
HPMC tuaj yeem txhim kho qhov ruaj khov ntawm cov cement-raws li cov nplaum nplaum. Nws tiv thaiv cov nplaum los ntawm kev tawg vim raug ya raws thiab lwm yam ib puag ncig. Nws kuj txo cov efflorescence uas tsim nyob rau saum npoo ntawm cov pobzeb.
6) Ua kom lub teeb nrawm
HPMC pab txhawm rau txhawm rau txhawm rau txhim kho cov cement-based pobzeb nplaum. Qhov no yog ib qho tseem ceeb thaum lub sij hawm yog qhov tseem ceeb thiab cov nplaum yuav tsum tau teem sai sai kom cov pobzeb ruaj ntseg nyob rau hauv qhov chaw.
7) Txo qhov kev pheej hmoo ntawm grout cracking
HPMC pab txo qis qhov tshwm sim ntawm grout cracking. Grout cracking tshwm sim thaum lub zog ntawm lub substrate tawg qhov kev sib raug zoo ntawm cov pobzeb thiab cov nplaum. HPMC tuaj yeem ua rau cov nplaum nplaum ntau dua, uas pab nqus cov substrate txav thiab tiv thaiv cov kab nrib pleb los ntawm kev tsim.
Hauv cov ntsiab lus, HPMC yog ib qho tseem ceeb ntawm cov cement-raws li cov nplaum nplaum. Nws cov khoom siv ntau yam ua rau nws yog ib feem tseem ceeb ntawm cov nplaum siv los nteg cov vuas. Nws plays lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntev, kev ua haujlwm thiab kev ua haujlwm ntawm cov nplaum. Thaum ntxiv rau cov cement-raws li cov nplaum nplaum, nws ua kom muaj kev ua tau zoo, kev ua haujlwm ntev thiab kev txaus siab rau cov neeg siv khoom.
Post lub sij hawm: Lub Xya hli ntuj-18-2023