Hydroxypropyl Methylcellulose (HPMC) yog ib qho tseem ceeb cellulose ether uas siv dav hauv cov mortar qhuav sib xyaw kom txhim kho nws txoj kev ua haujlwm. Lub tshuab ua haujlwm ntawm HPMC hauv cov mortar qhuav sib xyaw feem ntau yog pom tseeb hauv kev khaws cia dej noo, kev hloov kho qhov sib xws, kev tiv thaiv sag thiab kev tiv thaiv tawg.
1. Kev khaws cia dej noo
Lub luag haujlwm tseem ceeb ntawm HPMC yog los txhim kho lub peev xwm khaws dej ntawm cov pob zeb qhuav. Thaum lub sijhawm tsim kho, qhov dej ua kom qhuav sai hauv cov pob zeb yuav ua rau nws qhuav sai dhau, ua rau cov cement tsis muaj dej txaus thiab cuam tshuam rau lub zog kawg. Cov qauv molecular ntawm HPMC muaj ntau pawg hydrophilic (xws li hydroxyl thiab methoxy pawg), uas tuaj yeem tsim cov hydrogen bonds thiab txhim kho kev khaws dej zoo heev. Cov qauv network uas nws tsim hauv cov pob zeb pab kaw cov dej noo, yog li ua rau qeeb qeeb ntawm cov dej ua kom qhuav.
Kev khaws dej tsis yog tsuas yog pab ua kom lub sijhawm ua haujlwm ntawm cov mortar ntev dua xwb, tab sis kuj tseem ua rau kev tsim kho du thiab zoo dua hauv qhov kub qis lossis qhov chaw qhuav. Los ntawm kev tswj kom muaj av noo txaus, HPMC ua rau cov mortar ua haujlwm tau zoo rau lub sijhawm ntev dua, zam kev tawg thiab teeb meem kev tsim kho los ntawm kev poob dej noo.
2. Kev kho kom sib xws
HPMC kuj muaj lub luag haujlwm ntawm kev kho qhov sib xws ntawm cov mortar qhuav sib xyaw, uas yog qhov tseem ceeb rau kev ua kua thiab kev sib kis ntawm kev tsim kho. HPMC tsim cov tshuaj colloidal thaum yaj hauv dej, thiab nws cov viscosity nce ntxiv nrog rau qhov hnyav molecular nce. Thaum lub sijhawm tsim kho, cov khoom colloidal ntawm HPMC ua rau cov mortar nyob rau qee qhov sib xws thiab tiv thaiv kev txo qis ntawm cov mortar vim muaj dej sib cais.
Kev sib xws kom zoo ua kom cov mortar raug coated sib npaug ntawm lub substrate thiab tuaj yeem ua kom tiav cov qhov hws thiab cov chaw tsis sib xws ntawm qhov chaw ntawm lub substrate. Cov yam ntxwv no tseem ceeb heev kom ntseeg tau tias qhov nplaum thiab kev tsim kho zoo ntawm cov mortar. HPMC kuj tseem tuaj yeem hloov kho rau ntau yam kev xav tau kev tsim kho los ntawm kev kho cov feem sib txawv thiab muab kev ua haujlwm tswj tau.
3. Cov khoom tiv thaiv kev qaug zog
Ntawm cov chaw tsim kho ntsug lossis inclined (xws li phab ntsa plastering lossis masonry bonding), cov mortar yuav yooj yim sagging lossis swb vim nws qhov hnyav. HPMC ua rau kom muaj kev tiv thaiv sag ntawm mortar los ntawm kev nce nws cov thixotropy. Thixotropy hais txog lub peev xwm ntawm mortar los txo nws cov viscosity thaum raug shear force thiab rov qab tau nws cov viscosity tom qab lub shear force ploj mus. HPMC tuaj yeem tsim cov slurry nrog thixotropy zoo, ua rau cov mortar yooj yim siv thaum lub sijhawm tsim kho, tab sis nws tuaj yeem rov qab tau nws cov viscosity sai sai thiab raug kho rau ntawm qhov chaw tsim kho tom qab nres kev ua haujlwm.
Qhov feature no txo cov khib nyiab mortar thiab txhim kho kev ua haujlwm zoo thiab zoo ntawm kev tsim kho. Hauv cov ntawv thov xws li kev sib txuas pobzeb, HPMC qhov kev tiv thaiv sag tuaj yeem ua kom cov pobzeb tsis txav tom qab muab tso rau, yog li txhim kho qhov tseeb ntawm kev tsim kho.
4. Kev tiv thaiv tawg
Cov mortar qhuav tom qab kev tsim kho feem ntau yuav tawg thaum lub sijhawm ua kom tawv, uas feem ntau yog vim qhov ntsws los ntawm kev faib tsis sib xws ntawm cov dej noo sab hauv. Los ntawm kev txhim kho qhov khaws dej thiab kev sib xws ntawm cov mortar, HPMC muaj peev xwm txo cov dej noo sab hauv, yog li txo cov kev ntxhov siab ntsws. Tib lub sijhawm, HPMC tuaj yeem tawg thiab nqus cov kev ntxhov siab ntsws thiab txo qhov tshwm sim ntawm kev tawg los ntawm kev tsim cov qauv network ywj pheej hauv cov mortar.
Kev tiv thaiv kev tawg yog qhov tseem ceeb rau kev ua kom lub zog thiab lub neej ua haujlwm ntawm cov mortar ntev dua. Lub luag haujlwm no ntawm HPMC ua rau cov mortar khaws cov khoom zoo thaum siv ntev thiab tsis tshua muaj kev tawg thiab tev tawm.
5. Cov ntaub ntawv tsim kho thiab daim ntawv thov
Hauv kev tsim kho tiag tiag, HPMC feem ntau yog ntxiv rau ntau hom mortars qhuav raws li qhov xav tau tshwj xeeb, xws li plastering mortars, tile bonding mortars thiab self-leveling mortars. Qhov ntxiv thiab qhov sib piv tshwj xeeb yuav tsum tau ua kom zoo raws li hom mortar, qhov xwm txheej ntawm cov khoom siv hauv paus thiab qhov chaw tsim kho. Piv txwv li, thaum tsim kho hauv qhov chaw kub siab, kev nce ntxiv ntawm HPMC kom haum tuaj yeem txhim kho kev khaws dej ntawm mortar thiab zam kev nyuaj hauv kev tsim kho thiab teeb meem zoo los ntawm kev qhuav sai.
Thaum siv cov nplaum rau cov vuas pobzeb ceramic, HPMC tuaj yeem muab kev nplaum zoo heev thiab tiv taus kev poob qis kom ntseeg tau tias cov vuas pobzeb ceramic lo rau ntawm phab ntsa. Tib lub sijhawm, los ntawm kev kho qhov ntau ntawm HPMC ntxiv, lub sijhawm qhib ntawm cov mortar kuj tseem tuaj yeem tswj tau kom yooj yim rau kev ua haujlwm ntawm cov neeg ua haujlwm tsim kho.
Hydroxypropyl methylcellulose (HPMC), ua ib qho khoom siv ntxiv zoo, txhim kho qhov kev tsim kho ntawm cov mortar qhuav los ntawm nws cov dej khaws cia, kev hloov kho qhov sib xws, tiv thaiv kev poob qis thiab tiv thaiv kev tawg. Cov khoom no tsis yog tsuas yog txhim kho cov khoom siv ntawm cov mortar, tab sis kuj txhim kho qhov zoo ntawm kev tsim kho thiab kev ruaj khov. Kev siv HPMC kom zoo tuaj yeem daws tau cov teeb meem ntawm ntau qhov chaw tsim kho thiab muab cov khoom siv zoo dua rau cov haujlwm tsim kho. Yav tom ntej, nrog rau kev txhim kho tas mus li ntawm cov ntaub ntawv tshawb fawb thiab kev siv tshuab tsim kho, kev cia siab ntawm kev siv HPMC hauv cov mortar qhuav yuav dav dua.
Lub sijhawm tshaj tawm: Lub Xya Hli-10-2024