Hydroxypropyl Methylcellulose (HPMC) yog ib qho dej-soluble nonionic cellulose ether uas tau siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog lub tsev mortars thiab plastering mortars. HPMC plays ntau lub luag haujlwm tseem ceeb hauv cov ntawv thov no, suav nrog kev ua kom tuab, tuav dej, sib txuas thiab lubrication. Cov haujlwm no ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm, ua haujlwm ntev thiab kev tsim kho ntawm mortar.
1. Thickening nyhuv
HPMC muaj cov nyhuv thickening thiab tuaj yeem txhim kho qhov sib xws thiab rheology ntawm mortar. Tom qab ntxiv HPMC rau hauv mortar, cov cement hais thiab lwm yam khoom muaj peev xwm raug tshem tawm thiab dispersed ntau tusyees, yog li tsis txhob muaj teeb meem delamination thiab segregation ntawm lub mortar. Cov nyhuv thickening ua rau cov mortar yooj yim rau kev thov thiab cov duab thaum lub sij hawm tsim kho, txhim kho kev tsim kho kom zoo thiab zoo.
2. Dej tuav nyhuv
Kev tuav dej yog qhov tseem ceeb ntawm HPMC hauv kev tsim cov mortars. HPMC muaj peev xwm hydration zoo thiab gelling zog, thiab muaj peev xwm tsim ib tug ruaj khov noo noo network qauv nyob rau hauv lub mortar kom zoo kaw nyob rau hauv noo noo. Kev tuav dej yog qhov tseem ceeb rau cov txheej txheem hardening ntawm mortar. Qhov tsim nyog ntawm cov dej hauv cov tshuaj khib nyiab tuaj yeem ua kom muaj dej txaus cov tshuaj tiv thaiv ntawm cov cement, yog li txhim kho lub zog thiab kav ntev ntawm cov mortar. Nyob rau tib lub sijhawm, kev tuav dej zoo kuj tseem tuaj yeem tiv thaiv cov evaporation sai ntawm cov dej thaum lub sijhawm tsim kho, yog li tiv thaiv kev tawg thiab shrinkage ntawm mortar.
3. Bonding nyhuv
HPMC tuaj yeem txhim kho qhov adhesion ntawm mortar, txhim kho qhov adhesion ntawm mortar thiab hauv paus txheej, txhawb nqa mesh thiab cov ntaub ntawv zoo nkauj. Qhov kev sib koom ua ke no tuaj yeem tsis tsuas yog txhim kho qhov tawg ntawm cov tshuaj khib nyiab, tab sis kuj ua rau kom huab cua tsis kam ntawm cov tshuaj khib. Tshwj xeeb tshaj yog nyob rau hauv plastering mortar, zoo bonding zog muaj peev xwm xyuas kom meej tias lub mortar yog nrees txuas mus rau phab ntsa nto thiab tiv thaiv lub plastering txheej los ntawm ntog tawm thiab tev tawm.
4. Lubricating nyhuv
HPMC tuaj yeem tsim cov tshuaj colloidal du hauv cov kua dej, muab cov tshuaj khib nyiab zoo heev. Cov nyhuv lubrication no ua rau cov mortar smoother thiab yooj yim rau kev khiav lag luam thaum lub sij hawm tsim kho, txo qhov nyuaj ntawm kev tsim kho thiab kev siv zog. Nyob rau tib lub sijhawm, lubricity kuj tuaj yeem ua rau daim ntawv thov ntawm mortar ntau dua thiab du, txhim kho kev tsim kho kom zoo.
5. Txhim kho Frost tsis kam
HPMC kuj muaj qhov cuam tshuam zoo rau qhov kev tiv thaiv ntawm cov tshuaj khib nyiab. Nyob rau hauv ib puag ncig uas tsis muaj qhov kub thiab txias, cov dej noo uas khaws cia hauv cov tshuaj khib nyiab tuaj yeem khov, ua rau muaj kev puas tsuaj rau cov mortar. Cov dej tuav thiab cov nyhuv thickening ntawm HPMC tuaj yeem txo cov dej ntws mus rau qee qhov thiab ua kom cov dej khov ua kom nrawm, yog li tiv thaiv cov qauv mortar.
Hydroxypropyl methylcellulose (HPMC) muaj ntau lub luag haujlwm tseem ceeb hauv kev tsim cov mortars thiab plastering mortars, nrog rau cov thickening, dej tuav, bonding thiab lubrication. Cov haujlwm no tsis yog tsuas yog txhim kho kev ua haujlwm thiab kev tsim kho ntawm lub mortar, tab sis kuj tseem txhim kho lub cev thiab cov khoom siv ntawm cov tshuaj khib nyiab, ua rau nws cov kav ntev thiab tawg tsis kam. Yog li ntawd, HPMC tau siv ntau dua hauv cov khoom siv hauv tsev niaj hnub thiab yog ib qho ntawm cov ntaub ntawv tseem ceeb los txhim kho cov kev tsim kho kom zoo.
Post lub sij hawm: Aug-01-2024