HPMC hauv mortar yog dab tsi?

HPMC (Hydroxypropyl Methylcellulose) yog ib qho tshuaj ntxiv tseem ceeb uas siv dav hauv kev tsim cov mortars. Nws yog ib qho cellulose ether uas tsis yog ionic, uas feem ntau tau los ntawm kev hloov pauv tshuaj ntawm cov cellulose ntuj.

1. Kev khaws dej
Lub luag haujlwm tseem ceeb ntawm HPMC yog los txhim kho qhov khaws dej ntawm cov mortar. Qhov no txhais tau tias thaum lub sijhawm ua kom cov mortar tawv, cov dej yuav tsis ploj sai, tab sis yuav raug kaw rau hauv cov mortar, yog li ua kom lub sijhawm ua kom cov cement noo thiab txhim kho lub zog ntawm cov cement. Qhov no tseem ceeb heev rau hauv qhov chaw qhuav thiab kub, qhov twg cov dej poob sai tuaj yeem ua rau cov mortar tawg thiab poob lub zog. HPMC tuaj yeem txo qhov evaporation ntawm cov dej los ntawm kev tsim cov zaj duab xis ntom ntom, xyuas kom meej tias cov cement tau hydrated tag nrho thiab txhim kho kev ua tau zoo ntawm cov mortar.

2. Txhim kho kev tsim kho
HPMC kuj tseem tuaj yeem txhim kho qhov ua haujlwm ntawm cov mortar. Nws muab cov mortar zoo dua, ua rau nws du thiab yooj yim rau kev nthuav dav thaum siv, txo cov neeg ua haujlwm lub zog thaum lub sijhawm tsim kho. Tib lub sijhawm, HPMC kuj tseem tuaj yeem txhim kho qhov kev tiv thaiv ntawm mortar, uas yog, cov mortar yuav tsis yooj yim plam thaum siv rau ntawm phab ntsa lossis lwm qhov chaw ntsug, uas yog qhov tseem ceeb rau kev ua kom zoo ntawm kev tsim kho.

3. Kev nplaum
Hauv cov tshuaj khib, HPMC kuj tseem ua lub luag haujlwm hauv kev txhim kho kev nplaum. Nws tuaj yeem txhim kho lub zog sib txuas ntawm cov tshuaj khib thiab cov khoom siv hauv paus (xws li cib, pob zeb lossis pob zeb ua vaj tse), yog li txo qhov tshwm sim ntawm cov teeb meem xws li hollowing thiab poob tawm. HPMC ua kom ntseeg tau tias cov tshuaj khib tuaj yeem lo rau cov khoom siv hauv paus tom qab kev tsim kho los ntawm kev txhim kho kev sib koom ua ke thiab kev nplaum ntawm cov tshuaj khib.

4. Tiv thaiv kev tawg
HPMC tuaj yeem txhim kho qhov tsis kam ntawm cov mortar. Thaum lub sijhawm ua kom cov mortar tawv, kev ntxhov siab shrinkage yuav tshwm sim vim yog cov tshuaj tiv thaiv hydration ntawm cov cement. Tshwj xeeb tshaj yog thaum dej poob sai, qhov kev ntxhov siab no yuav ua rau cov mortar tawg. HPMC qeeb qeeb qhov shrinkage ntawm cement los ntawm kev tswj hwm qhov dej noo kom zoo, yog li txo qhov tshwm sim ntawm cov kab nrib pleb. Tsis tas li ntawd, nws txhim kho qhov yooj ywm ntawm cov mortar, txo qhov kev pheej hmoo ntawm kev tawg.

5. Ncua lub sijhawm teeb tsa
HPMC tuaj yeem ncua lub sijhawm teeb tsa ntawm cov mortar, uas yog qhov zoo heev rau qee qhov xwm txheej tshwj xeeb ntawm kev tsim kho. Piv txwv li, thaum huab cua kub lossis qhuav, cov mortar teeb sai dhau, uas yuav ua rau kev txhim kho tsis zoo lossis qhov zoo ntawm kev tsim kho tsis zoo. Los ntawm kev kho lub sijhawm teeb tsa, HPMC muab sijhawm ntau rau cov neeg ua haujlwm tsim kho rau kev hloov kho thiab kev ua haujlwm, txhim kho kev ywj pheej thiab kev tswj hwm ntawm kev tsim kho.

6. Txhim kho kev tiv thaiv te
HPMC kuj tseem tuaj yeem txhim kho qhov kev tiv thaiv te ntawm cov mortar. Hauv huab cua txias, cov mortar uas tsis tau tawv tsis tiav yuav khov yog tias raug rau qhov kub qis, cuam tshuam rau nws lub zog thiab kev ruaj khov. HPMC txhim kho qhov kev tiv thaiv khov-thaw los ntawm kev txhim kho cov qauv me me ntawm cov mortar thiab txo qhov kev tsiv teb tsaws chaw thiab kev khov ntawm cov dej noo sab hauv.

7. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HPMC yog ib qho tshuaj ntxiv uas zoo rau ib puag ncig thiab muaj kev nyab xeeb. Vim tias nws tau rho tawm los ntawm cov cellulose ntuj thiab hloov kho los ntawm tshuaj lom neeg, nws tsis muaj tshuaj lom, tsis muaj teeb meem thiab zoo rau ib puag ncig. Qhov no ua rau HPMC yog ib qho tshuaj ntxiv nrov heev hauv kev lag luam kev tsim kho, tshwj xeeb tshaj yog rau cov haujlwm uas xav tau ua raws li cov qauv ib puag ncig.

8. Daim ntawv thov rau ntau hom mortars
Raws li ntau hom mortar sib txawv (xws li cov mortar bonding tile, plastering mortar, self-leveling mortar, thiab lwm yam), qhov ntau npaum li cas thiab kev ua tau zoo ntawm HPMC yuav txawv. Piv txwv li, hauv cov mortars bonding ceramic tile, HPMC feem ntau yog siv los xyuas kom meej tias cov vuas ceramic ruaj khov los ntawm kev txhim kho kev nplaum thiab kev tiv thaiv kev plam; hauv cov mortars leveling tus kheej, HPMC feem ntau yog siv los kho qhov fluidity thiab dej khaws cia kom ntseeg tau tias cov mortar tuaj yeem nthuav dav thiab sib npaug.

Kev siv HPMC hauv kev tsim kho mortar muaj ntau yam. Nws tsis tsuas yog txhim kho kev ua haujlwm ntawm mortar, tab sis kuj txhim kho kev ruaj khov thiab kev siv ntawm mortar. Vim nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, HPMC tau dhau los ua qhov tseem ceeb thiab tseem ceeb ntawm cov ntaub ntawv tsim kho niaj hnub.