Taw qhia rau HPMC thiab MHEC:
HPMC thiab MHEC yog cov cellulose ethers uas feem ntau siv rau hauv cov ntaub ntawv siv hauv kev tsim kho, suav nrog cov mortars qhuav. Cov polymers no yog los ntawm cellulose, ib qho polymer ntuj uas pom muaj nyob rau hauv cov phab ntsa cell ntawm cov nroj tsuag. Thaum ntxiv rau cov mortars qhuav, HPMC thiab MHEC ua haujlwm ua cov khoom ua kom tuab, cov neeg sawv cev khaws dej, cov khoom khi, thiab txhim kho kev ua haujlwm thiab cov khoom sib txuas.
1. Kev khaws dej:
HPMC thiab MHEC yog cov polymers hydrophilic, txhais tau tias lawv muaj kev sib raug zoo nrog dej. Thaum muab tso rau hauv cov mortars qhuav, lawv tsim ib daim nyias nyias rau ntawm qhov chaw ntawm cov cement, tiv thaiv kev ua kom dej qhuav sai thaum lub sijhawm kho. Qhov kev ua kom noo noo ntev no ua rau lub zog ntawm cov mortar loj hlob, txo qhov kev pheej hmoo ntawm kev tawg thiab ua kom ntseeg tau tias qhov chaw teeb tsa raug.
2. Txhim kho kev ua haujlwm tau zoo:
HPMC thiab MHEC txhim kho qhov ua haujlwm tau ntawm cov mortar sib tov qhuav los ntawm kev muab lubrication. Lawv ua haujlwm ua plasticizers, txo qhov sib txhuam ntawm cov khoom me me thiab ua rau cov mortar yooj yim dua rau kev sib tov, nthuav dav thiab ua tiav. Qhov kev ua haujlwm tau zoo dua no ua rau muaj kev sib xws zoo dua thiab sib xws ntawm cov txheej mortar siv.
3. Nce sijhawm qhib:
Lub sijhawm qhib yog lub sijhawm uas cov mortar tseem siv tau tom qab sib tov. HPMC thiab MHEC txuas ntxiv lub sijhawm qhib ntawm cov mortar sib tov qhuav los ntawm kev qeeb qeeb ntawm cov dej evaporation. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv cov haujlwm loj dua uas xav tau lub sijhawm ua haujlwm ntev, xws li cov vuas vov lossis plaster daim ntawv thov.
4. Txhim kho kev nplaum:
Qhov muaj HPMC thiab MHEC nyob rau hauv cov mortars qhuav ua rau muaj kev sib txuas zoo dua rau ntau yam substrates suav nrog cov pob zeb ua vaj tse, masonry thiab cov vuas ceramic. Cov polymers no tsim kev sib koom ua ke ntawm cov mortar thiab substrate, txhim kho qhov ruaj khov thiab kev ua tau zoo ntawm cov khoom siv. Tsis tas li ntawd, lawv txo qhov kev pheej hmoo ntawm kev tawg thiab kev sib cais dhau sijhawm.
5. Tiv thaiv kev tawg:
Kev tawg yog ib qho teeb meem uas tshwm sim nrog cov mortar, tshwj xeeb tshaj yog thaum lub sijhawm ziab thiab kho. HPMC thiab MHEC pab txo qhov teeb meem no los ntawm kev txhim kho kev sib koom ua ke thiab kev ywj pheej ntawm cov mortar matrix. Los ntawm kev txo qis kev ntsws thiab tswj cov txheej txheem hydration, cov polymers no pab txhim kho qhov kev tiv thaiv tawg tag nrho ntawm cov mortar tiav, ua rau muaj cov qauv ntev dua.
6. Kev siv tau ntau yam:
HPMC thiab MHEC yog cov khoom siv ntxiv uas siv tau ntau yam hauv ntau hom mortar sib xyaw qhuav. Txawm yog masonry mortars, vuas vov nplaum, cov tshuaj sib xyaw ua ke lossis cov mortar kho, cov polymers no muab kev ua tau zoo thiab sib xws nrog lwm cov khoom xyaw. Qhov kev hloov pauv no ua rau cov txheej txheem tsim khoom yooj yim dua thiab tso cai rau kev tsim cov kev daws teeb meem mortar rau cov ntawv thov tshwj xeeb.
7. Cov txiaj ntsig ib puag ncig:
HPMC thiab MHEC yog cov khoom siv ntxiv uas zoo rau ib puag ncig uas tau los ntawm cov peev txheej rov ua dua tshiab. Lawv siv rau hauv cov mortars qhuav pab txo kev siv cov peev txheej ntuj thiab txo cov khib nyiab, yog li txhawb kev txhim kho kom ruaj khov. Tsis tas li ntawd, lawv cov biodegradability ua kom muaj kev cuam tshuam tsawg kawg nkaus rau ib puag ncig thaum kawg ntawm lub voj voog lub neej ntawm mortar.
HPMC thiab MHEC muaj ntau yam zoo thiab tseem ceeb hauv cov khoom siv mortar qhuav. Txij li kev txhim kho kev ua haujlwm thiab kev nplaum mus rau kev txhim kho kev tiv thaiv kab nrib pleb thiab kev ruaj khov, cov cellulose ethers no ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo thiab lub neej ntev ntawm cov mortars hauv kev siv hauv kev tsim kho. Raws li cov khoom ntxiv uas ruaj khov thiab siv tau ntau yam, HPMC thiab MHEC tseem yog thawj qhov kev xaiv rau cov tuam txhab tsim khoom uas tab tom nrhiav kev ua kom zoo dua ntawm lawv cov qauv mortar thaum txo qis kev cuam tshuam rau ib puag ncig.
Lub sijhawm tshaj tawm: Lub Ob Hlis-27-2024