1. Txheej txheem cej luam thiab cov khoom ntawm HPMC
Hydroxypropyl Methylcellulose (HPMC)yog non-ionic cellulose ether. Nws muaj cov yam ntxwv ntawm cov dej solubility, thickening, dej tuav, film-forming, dispersibility thiab stability los ntawm kev qhia hydroxypropyl thiab methyl functional pawg rau hauv cellulose molecular qauv. HPMC yog siv dav hauv cov khoom siv cement-based xws li lub tsev mortar, putty hmoov, self-leveling cement thiab pobzeb nplaum. Hauv kev tsim kho niaj hnub no, txhawm rau txhim kho kev ua haujlwm ntawm cov cement mortar, HPMC, ua cov khoom siv tseem ceeb, tuaj yeem txhim kho kev ua haujlwm zoo thiab ua haujlwm ntev ntawm cov khoom siv cement.
2. Lub luag haujlwm ntawm HPMC hauv cov khoom siv cement-based mortar
Thickening thiab ntxiv dag zog rau cov nyhuv
Raws li lub thickener thiab binder, HPMC tuaj yeem txhim kho qhov sib xws, kev sib txuas lub zog thiab kev ua haujlwm ntawm mortar thaum tsim kho. Los ntawm kev sib cuam tshuam nrog cov cement thiab xuab zeb, HPMC tsim ib qho kev ruaj ntseg ntawm peb-dimensional network qauv, uas muab cov mortar muaj zog cohesive quab yuam, ua rau nws nyuaj rau delaminate thiab los ntshav thaum lub sij hawm tsim kho, thaum tsim ib tug tuab txheej ntawm lub nto kom muaj zog thiab durability.
Txhim kho kev tuav dej kom zoo
Kev tuav dej yog ib qho tseem ceeb tshaj plaws hauv cov cement-based mortar, uas cuam tshuam ncaj qha rau kev nce qib ntawm cov cement hydration cov tshuaj tiv thaiv. HPMC tuaj yeem txhim kho lub peev xwm tuav dej ntawm mortar. Nws cov dej tuav cov txheej txheem yog ua kom cov dej tsis muaj zog los ntawm kev tsim cov yeeb yaj kiab dej siab, kom cov dej sib npaug sib npaug hauv cov tshuaj khib kom tsis txhob poob dej sai heev. Nyob rau hauv txoj kev no, nyob rau hauv ib puag ncig qhuav lossis kub kub, HPMC tuaj yeem tiv thaiv cov mortar los ntawm kev tawg thiab txhim kho kev tsim kho kom zoo thiab kev pab cuam lub neej ntawm mortar.
Txhim kho kev tsim kho thiab kev ua haujlwm tiv thaiv sagging
Cement mortar yog nquag sagging thaum lub sij hawm tsim kho, cuam tshuam qhov zoo thiab efficiency ntawm qhov project. Qhov sib ntxiv ntawm HPMC tuaj yeem muab cov mortar zoo tshaj plaws los tiv thaiv sagging, txhim kho thixotropy ntawm mortar, thiab ua rau nws nyuaj rau swb thaum lub façade tsim. Nyob rau tib lub sijhawm, HPMC tuaj yeem ua rau cov mortar muaj kev ua haujlwm zoo thiab lubricity, txhim khu kev ua haujlwm du, txo qhov nyuaj ntawm kev tsim kho, thiab txhim kho kev tsim kho.
Txhim khu lub shrinkage thiab tawg tsis kam ntawm mortar
Cement-based mortar yog qhov ua rau shrinkage tawg thaum lub sij hawm ziab, uas ua rau txo cov kav ntev. HPMC zoo txo qhov kev pheej hmoo ntawm shrinkage cracking los ntawm kev txhim kho cov cohesion thiab elasticity ntawm mortar. Tsis tas li ntawd, HPMC tuaj yeem ncua lub sijhawm hydration cov tshuaj tiv thaiv hauv mortar, ua kom cov cement hydration ntau txaus, yog li ua kom qeeb ntawm cov tshuaj khib nyiab thiab txhim kho qhov tawg tsis kam ntawm mortar.
3. Kev siv thaj chaw ntawm HPMC
Ordinary plaster mortar
Nyob rau hauv lub plaster mortar zoo tib yam, HPMC tuaj yeem txhim kho kev sib koom ua ke thiab kev tuav dej ntawm cov tshuaj khib nyiab, xyuas kom meej tias qhov kev tsim kho nto zoo ib yam thiab du, thiab txo qhov tshwm sim ntawm cov kab nrib pleb. Lub thixotropy ntawm HPMC tuaj yeem ua rau kom yooj yim ntawm kev ua haujlwm thaum lub sij hawm plastering, kom cov mortar tuaj yeem kho tau sai thiab tsim tom qab siv, thiab tuav cov nyhuv zoo.
Cov nplaum nplaum
HPMCyog dav siv nyob rau hauv cov pobzeb nplaum, thiab nws cov kev sib txuas zoo zog thiab cov khoom tiv thaiv plam tuaj yeem txhawb nqa cov vuas pasting. Nyob rau tib lub sijhawm, HPMC tuaj yeem ua kom cov ductility thiab dej tuav ntawm cov nplais nplaum, ua rau kev tsim kho kom ruaj khov thiab kav ntev. Tshwj xeeb hauv kev tsim cov pobzeb loj, HPMC tuaj yeem pab cov neeg ua haujlwm tsim kho kom raug thiab kho.
Self-leveling cement mortar
Self-leveling mortar yog tus kheej-leveling, ceev-forming khoom siv rau pem teb leveling. HPMC plays lub luag hauj lwm nyob rau hauv thickening thiab dej tuav, ua tus kheej-leveling cement slurry ruaj khov. HPMC kuj tseem tuaj yeem txhim kho qhov fluidity thiab dispersibility ntawm tus kheej-leveling mortar, yog li zam qhov tshwm sim ntawm sedimentation.
Dry-mixed mortar thiab putty hmoov
Hauv cov hmoov sib xyaw qhuav thiab cov hmoov sib tov, HPMC txhim kho qhov tiaj tus thiab qhov chaw zoo ntawm qhov chaw tsim kho los ntawm kev tuav dej thiab ua kom adhesion, thaum tiv thaiv kom qhuav thiab tawg. Hauv cov hmoov putty, HPMC tsis tsuas yog muab cov nyhuv du, tab sis kuj ua kom lub ntsej muag tom qab kev tsim kho tsis yooj yim tawg, txhim kho qhov ua tiav thiab kev pab cuam lub neej.
4. Kev ceev faj rau kev siv HPMC hauv cov khoom siv cement-based mortar
Kev tswj noj tshuaj
Tus nqi ntawm HPMC ntxiv muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm cov tshuaj khib nyiab. Kev sib ntxiv ntau dhau yuav ua rau cov mortar tuab heev, ua haujlwm nyuaj, thiab ua kom tawv nqaij los yog txo lub zog ntawm qhov chaw tom qab ziab. Yog li ntawd, tus nqi ntawm HPMC yuav tsum tau tswj nruj me ntsis thaum npaj cov mortar. Qhov feem ntau pom zoo ntxiv yog 0.1% -0.3% ntawm qhov hnyav ntawm cov cement.
Compatibility nrog lwm yam additives
Hauv cov ntaub ntawv cement-based, HPMC tuaj yeem cuam tshuam nrog lwm cov khoom siv ntxiv xws li cov dej txo qis, cov khoom siv cua nkag, thiab cov tshuaj tiv thaiv. Kev sib raug zoo ntawm HPMC nrog rau lwm cov khoom sib xyaw yuav tsum tau txiav txim siab thaum tsim cov qauv, thiab cov qauv yuav tsum tau ua kom zoo dua los ntawm kev sim ua kom zoo tshaj plaws.
Txoj kev dispersion thiab dissolution
HPMC yuav tsum sib npaug sib npaug thaum siv kom tsis txhob muaj kev sib xyaw ua ke uas cuam tshuam rau kev ua haujlwm ntawm mortar. HPMC feem ntau tuaj yeem muab ntxiv thaum lub sijhawm sib tov kom yaj nws tusyees hauv dej, thiaj li muab kev ua si tag nrho rau nws lub luag haujlwm.
HPMC yog dav siv nyob rau hauv cement-raws li cov ntaub ntawv hauv tsev mortar, thiab nws plays lub luag hauj lwm irreplaceable nyob rau hauv kev txhim kho thickening, dej tuav thiab anti-cracking, thiab txhim kho kev tsim kho kev ua tau zoo. Nrog rau kev tsim cov khoom siv thev naus laus zis thiab kev xav tau ntau ntxiv rau kev tiv thaiv ib puag ncig thiab kev txuag hluav taws xob, daim ntawv thov ntawm HPMC tseem nthuav dav thiab txhim kho. Los ntawm kev tshawb fawb tswj ntawm daim ntawv thov txoj kev thiab ntau npaum li cas ntawm HPMC, kev tsim kho cov nyhuv thiab durability ntawm cement-based cov ntaub ntawv tuaj yeem txhim kho kom zoo dua qub, txhawb kev txhim kho thiab kev loj hlob ntawm kev tsim kho kev lag luam.
Post lub sij hawm: Nov-11-2024