HPMC (Hydroxypropyl Methylcellulose) yog ib qho tseem ceeb chemical additive lug siv hauv tsev mortars. Nws yog non-ionic cellulose ether, uas yog tsuas yog tau los ntawm kev hloov kho tshuaj ntawm ntuj cellulose.
1. Kev tuav dej
Lub luag haujlwm tseem ceeb ntawm HPMC yog txhawm rau txhim kho cov dej tuav ntawm mortar. Qhov no txhais tau hais tias thaum lub sij hawm hardening txheej txheem ntawm mortar, cov dej yuav tsis ploj sai sai, tab sis yuav muab xauv rau hauv lub mortar, yog li ncua lub sij hawm hydration cov tshuaj tiv thaiv ntawm cov cement thiab txhim kho lub zog ntawm cov cement. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv qhov chaw qhuav, kub, qhov twg dej sai sai tuaj yeem ua rau cov mortar tawg thiab poob lub zog. HPMC tuaj yeem txo cov dej evapc los ntawm kev sib sau ua cov yeeb yaj kiab tuab, ua kom cov xis nyob thiab txhim kho txhua qhov kev ua tau zoo ntawm lub tshuaj khib.
2. Txhim kho kev tsim kho
HPMC kuj tseem tuaj yeem txhim kho kev ua haujlwm ntawm mortar. Nws muab cov mortar zoo dua lubricity, ua kom nws smoother thiab yooj yim rau kis tau thaum thov, txo cov neeg ua hauj lwm lub cev exertion thaum lub sij hawm tsim kho. Nyob rau tib lub sijhawm, HPMC tuaj yeem txhim kho qhov sag tsis kam ntawm mortar, uas yog, mortar yuav tsis plam yooj yim thaum siv rau ntawm phab ntsa lossis lwm qhov chaw ntsug, uas yog qhov tseem ceeb rau kev ua haujlwm zoo.
3. Adhesion
Hauv mortar, HPMC kuj tseem ua lub luag haujlwm hauv kev txhim kho adhesion. Nws tuaj yeem txhim kho lub zog sib txuas ntawm cov mortar thiab cov khoom siv hauv paus (xws li cib, pob zeb lossis pob zeb), yog li txo qhov tshwm sim ntawm cov teeb meem xws li hollowing thiab ntog tawm. HPMC xyuas kom meej tias cov mortar tuaj yeem ruaj khov rau cov khoom siv tom qab kev tsim kho los ntawm kev txhim kho cov cohesion thiab adhesion ntawm mortar.
4. Kev tiv thaiv tawg
HPMC tuaj yeem txhim kho qhov tawg tsis kam ntawm mortar. Thaum lub sij hawm hardening txheej txheem ntawm mortar, shrinkage kev nyuaj siab yuav tshwm sim vim hydration cov tshuaj tiv thaiv ntawm cov cement. Tshwj xeeb tshaj yog thaum dej poob sai heev, qhov kev ntxhov siab no yuav ua rau lub mortar tawg. HPMC ua kom qis qis qis ntawm cov cement los ntawm kev tuav cov dej kom tsim nyog, yog li txo qhov tshwm sim ntawm cov kab nrib pleb. Tsis tas li ntawd, nws txhim kho qhov hloov pauv ntawm cov mortar, ntxiv txo qhov kev pheej hmoo ntawm kev tawg.
5. Ncua lub sijhawm teem sijhawm
HPMC tuaj yeem ncua lub sijhawm teem sijhawm ntawm mortar, uas muaj txiaj ntsig zoo rau qee qhov kev tsim kho tshwj xeeb. Piv txwv li, nyob rau hauv cov huab cua kub los yog qhuav, lub mortar teem sai heev, uas yuav ua rau kev txhim kho kev loj hlob mus rau hindered los yog kev tsim kho tsis zoo. Los ntawm kev kho lub sijhawm teeb tsa, HPMC muab sijhawm rau cov neeg ua haujlwm tsim kho ntau dua rau kev hloov kho thiab ua haujlwm, txhim kho qhov yooj yim thiab tswj kev tsim kho.
6. Txhim kho Frost tsis kam
HPMC kuj tseem tuaj yeem txhim kho cov dej khov tiv thaiv ntawm mortar. Nyob rau hauv cov huab cua txias, tsis tiav mortar hardened yuav khov yog tias raug kub tsawg, cuam tshuam nws lub zog thiab durability. HPMC txhim kho qhov khov-thaw tiv thaiv los ntawm kev txhim kho microstructure ntawm cov mortar thiab txo cov kev tsiv teb tsaws thiab khov ntawm cov dej hauv sab hauv.
7. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HPMC yog ib puag ncig tus phooj ywg thiab nyab xeeb additive. Txij li nws tau muab rho tawm los ntawm ntuj cellulose thiab tshuaj hloov kho, nws yog non-toxic, harmless thiab environmentally friendly. Qhov no ua rau HPMC yog qhov nrov tshaj plaws hauv kev tsim kho kev lag luam, tshwj xeeb tshaj yog nyob rau hauv tej yaam num uas yuav tsum tau ua raws li ib puag ncig cov qauv.
8. Daim ntawv thov nyob rau hauv ntau hom mortars
Raws li ntau hom mortar (xws li pobzeb sib txuas mortar, plastering mortar, self-leveling mortar, thiab lwm yam), qhov ntau npaum thiab kev ua tau zoo ntawm HPMC yuav txawv. Piv txwv li, nyob rau hauv ceramic pobzeb bonding mortars, HPMC feem ntau yog siv los xyuas kom meej stability ntawm ceramic vuas los ntawm kev txhim kho adhesion thiab plam tsis kam; Nyob rau hauv tus kheej-leveling mortars, HPMC feem ntau yog siv los kho fluidity thiab dej tuav kom ntseeg tau tias cov mortar tuaj yeem sib kis tau zoo thiab sib npaug.
Daim ntawv thov ntawm HPMC hauv kev tsim mortar yog ntau yam. Nws tuaj yeem tsis tsuas yog txhim kho kev tsim kho kev ua haujlwm ntawm mortar, tab sis kuj txhim kho cov kav ntev thiab siv cov nyhuv ntawm mortar. Vim nws qhov tshwj xeeb lub cev thiab tshuaj lom neeg, HPMC tau dhau los ua ib qho tseem ceeb thiab tseem ceeb ntawm cov khoom siv hauv tsev niaj hnub.
Post lub sij hawm: Aug-22-2024