Tau ntau pua xyoo, cov pob zeb masonry thiab plaster mortars tau siv los tsim cov qauv zoo nkauj thiab ruaj khov. Cov pob zeb no yog ua los ntawm kev sib xyaw ntawm cov cement, xuab zeb, dej thiab lwm yam khoom ntxiv. Hydroxypropyl methylcellulose (HPMC) yog ib qho khoom ntxiv zoo li no.
HPMC, tseem hu ua hypromellose, yog ib qho cellulose ether hloov kho uas tau los ntawm cov ntoo pulp thiab paj rwb fibers. Nws yog ib qho khoom xyaw siv tau ntau yam hauv ntau yam lag luam, suav nrog kev tsim kho, tshuaj, khoom noj thiab cov khoom siv tu tus kheej. Hauv kev tsim kho, HPMC yog siv los ua cov khoom ua kom tuab, cov khoom sib txuas, cov neeg sawv cev khaws dej thiab cov khoom hloov pauv rheology hauv cov qauv mortar.
Lub luag haujlwm ntawm HPMC hauv masonry plastering mortar
1. Kev tswj xyuas kom sib xws
Qhov sib xws ntawm cov mortar yog qhov tseem ceeb rau kev siv thiab kev sib txuas kom zoo. HPMC yog siv los tswj qhov sib xws ntawm cov masonry thiab plaster mortars. Nws ua haujlwm ua ib qho thickener, tiv thaiv cov mortar kom tsis txhob ua kua dhau lossis tuab dhau, ua rau kev siv du.
2. Kev khaws dej
Dej yog qhov tseem ceeb heev rau cov txheej txheem hydration ntawm cement, uas yog ib qho tseem ceeb ntawm masonry thiab plastering mortars. Txawm li cas los xij, dej ntau dhau tuaj yeem ua rau shrinkage thiab tawg. HPMC pab khaws cov dej noo hauv cov mortar, ua rau cov cement hydration zoo thaum txo cov dej poob los ntawm kev ua pa. Qhov no ua rau muaj kev ua haujlwm zoo dua, kev nplaum zoo dua thiab lub zog ntxiv.
3. Teem sijhawm
Lub sijhawm teeb tsa ntawm cov mortar cuam tshuam rau qhov ruaj khov thiab kev nplaum ntawm cov qauv kawg. HPMC tuaj yeem siv los tswj lub sijhawm teeb tsa ntawm masonry thiab plastering mortars. Nws ua haujlwm ua tus retarder, qeeb cov txheej txheem hydration ntawm cement. Qhov no ua rau lub sijhawm ua haujlwm ntev dua thiab kev ua tau zoo dua.
4. Lub zog nplaum
Lub zog sib txuas ntawm cov mortars yog qhov tseem ceeb rau qhov ruaj khov ntawm cov qauv masonry thiab plaster. HPMC ua rau lub zog sib txuas ntawm mortar thiab substrate los ntawm kev muab kev sib txuas zoo dua thiab kev ua haujlwm zoo dua. Qhov no ua rau cov qauv muaj zog dua thiab ruaj khov dua.
Cov txiaj ntsig ntawm HPMC hauv masonry thiab plastering mortars
1. Txhim kho kev ua haujlwm tau zoo
HPMC pab txhim kho kev ua haujlwm ntawm cov masonry thiab plastering mortars. Cov yam ntxwv ntawm HPMC ua rau tuab thiab khaws dej ua rau kev siv mortar du thiab yooj yim dua. Qhov no ua rau kev ua haujlwm zoo dua thiab ceev ntawm kev tsim kho.
2. Txo qhov ntsws thiab tawg
Qhov ntsws thiab tawg yog cov teeb meem uas tshwm sim nrog cov masonry thiab plaster mortars ib txwm muaj. Cov yam ntxwv ntawm HPMC uas khaws dej kom txo qhov evaporation thiab tiv thaiv kom tsis txhob ntsws thiab tawg. Qhov no ua rau cov qauv ruaj khov dua thiab siv tau ntev dua.
3. Txhim kho kev ruaj khov
Qhov ntxiv ntawm HPMC rau hauv cov masonry thiab plastering mortars ua rau lub zog ntawm qhov kawg zoo dua. HPMC tau txhim kho lub zog sib txuas, kev ua haujlwm tau zoo thiab kev khaws dej, ua rau lub cev muaj zog dua thiab kav ntev dua.
4. Kev ua tau zoo ntawm tus nqi siab
HPMC yog ib qho tshuaj ntxiv uas pheej yig thiab muaj ntau yam txiaj ntsig zoo rau kev siv rau hauv kev tsim cov pob zeb masonry thiab plastering mortar. Nws cov yam ntxwv txo qhov kev pheej hmoo ntawm cov teeb meem xws li kev ntsws thiab kev tawg, yog li txo cov nqi kho kom zoo thoob plaws lub neej ntawm cov qauv.
xaus lus
HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo thiab kev ua tau zoo ntawm cov masonry thiab plastering mortars. Nws txoj kev tswj hwm kev sib xws, kev khaws dej, kev tswj lub sijhawm teeb tsa thiab cov khoom sib txuas muaj zog muab ntau yam txiaj ntsig rau kev lag luam kev tsim kho. Kev siv HPMC ua rau muaj kev ua haujlwm zoo dua, txo qis kev ntsws thiab tawg, txhim kho kev ruaj khov thiab kev tsim kho pheej yig. Kev koom ua ke ntawm HPMC rau hauv masonry thiab render mortars yog ib kauj ruam zoo rau kev ua haujlwm zoo dua, ruaj khov thiab ruaj khov.
Lub sijhawm tshaj tawm: Lub Kaum Hli-08-2023