HPMC (Hydroxypropyl Methyl Cellulose) yog ib qho khoom siv ntxiv rau hauv cov cement mortar. Nws yog ib qho non-ionic cellulose ether tau los ntawm kev kho cellulose nrog methyl chloride thiab propylene oxide. HPMC yog siv dav hauv kev lag luam kev tsim kho vim nws cov khoom zoo heev rau kev khaws dej, ua ib qho thickener thiab binder, thiab los txhim kho kev ua haujlwm thiab lub zog ntawm cement mortar. Hauv tsab xov xwm no, peb yuav tham txog cov txheej txheem ntawm kev ua haujlwm ntawm cellulose ethers hauv cement mortar.
kev khaws dej
HPMC muaj cov khoom zoo heev uas khaws dej tau zoo thiab tuaj yeem tswj cov dej hauv cov cement mortar thaum lub sijhawm teeb tsa. Kev ua haujlwm khaws dej ntawm HPMC pab txhawb cov txheej txheem hydration ntawm cement thiab qeeb cov txheej txheem ziab, yog li txhim kho lub zog ntawm cement mortar. Nws pab txo qhov shrinkage, tiv thaiv kev tawg thiab txhim kho kev sib txuas. Thaum ntxiv HPMC rau hauv cement mortar, nws tsim ib txheej tiv thaiv nyob ib puag ncig cov khoom hydration, qeeb qeeb ntawm kev evaporation ntawm dej hauv mortar.
Txhim kho kev ua haujlwm tau zoo
HPMC txhim kho qhov ua haujlwm tau ntawm cov cement mortars los ntawm kev ua haujlwm ua cov khoom ua kom tuab thiab cov khoom sib txuas. Thaum sib xyaw nrog dej, HPMC tsim cov tshuaj zoo li gel uas ua rau cov viscosity ntawm cov khoom sib tov nce ntxiv. Cov tshuaj zoo li gel no pab ua kom cov cement mortar nyob hauv qhov chaw thiab tsis khiav tawm ntawm cov pob qij txha thiab cov kab nrib pleb. Qhov ua haujlwm tau zoo dua ntawm cov cement mortar kuj pab txo cov nqi tag nrho ntawm qhov project vim nws tshem tawm qhov xav tau kev hloov kho ntau zaus. Ntxiv mus, nws tuaj yeem siv tau sai dua thiab yooj yim dua, ua rau kev tsim kho ceev dua.
ua kom muaj zog ntxiv
Lwm qhov txiaj ntsig tseem ceeb ntawm kev siv HPMC hauv cov cement mortar yog tias nws ua rau lub zog ntawm cov mortar nce ntxiv. HPMC pab kom cov cement sib kis sib npaug, ua rau muaj kev sib txuas zoo dua thiab txhim khu kev qha rau cov substrate. Cov khoom zoo dua ntawm HPMC pab txhawb kev kho cov cement mortar, yog li ua rau nws lub zog nce ntxiv. Cov dej hauv cov mortar muab cov dej rau cov cement thiab qhov muaj HPMC pab txhawb kev khaws cov dej, yog li txhim kho cov txheej txheem kho.
txo qhov ntsws
Qhov kev ntswj yog ib qho teeb meem uas tshwm sim ntau hauv cov cement mortar vim yog dej ua pa. Kev ntswj tuaj yeem ua rau tawg, uas tuaj yeem cuam tshuam rau lub zog thiab kev ruaj khov ntawm cov qauv. Txawm li cas los xij, HPMC pab txo qhov kev ntswj ntawm cov cement mortar los ntawm kev khaws cov dej noo thiab qeeb qeeb evaporation. Qhov no txo qhov kev pheej hmoo ntawm kev tawg, ua rau cov qauv muaj zog dua, ruaj khov dua.
txhim kho kev sib txuas
Thaum kawg, HPMC pab txhim kho lub zog sib txuas ntawm cov cement mortar. HPMC ua haujlwm ua tus khi uas pab tuav cov mortar ua ke. Nws kuj pab tsim kom muaj kev sib txuas zoo ntawm cov mortar thiab cov substrate. Lub peev xwm sib txuas ntawm cov cement mortar tau zoo dua, thiab cov qauv muaj zog dua thiab ruaj khov dua, uas tuaj yeem tiv taus lub zog sab nraud.
xaus lus
Xaus lus, HPMC yog ib qho khoom siv ntxiv rau hauv cov cement mortar vim nws khaws dej, ua haujlwm tau zoo, muaj zog, txo qhov ntsws thiab txhim kho kev sib koom ua ke. Lub tshuab ua haujlwm ntawm cellulose ethers hauv cement mortar yog raws li kev khaws dej zoo dua, pab txhawb rau hauv cov txheej txheem kho, muab kev sib kis ntawm cov cement, txhim kho kev ua haujlwm tau zoo, txo qhov ntsws thiab txhim kho kev sib txuas. Kev siv HPMC zoo hauv cov cement mortars tuaj yeem ua rau muaj cov qauv muaj zog dua, ruaj khov dua thiab txhim khu kev qha dua, uas yog qhov tseem ceeb rau txhua qhov project tsim kho. Nrog kev siv HPMC kom raug, cov project tsim kho tuaj yeem ua tiav sai dua, ua haujlwm tau zoo dua thiab zoo dua.
Lub sijhawm tshaj tawm: Lub Xya Hli-27-2023