Cellulose ethers yog ib hom dej-soluble polymer compound tsim tom qab kev hloov tshuaj ntawm cellulose.Lawv tau siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog thaum siv hauv mortar nrog cov teebmeem tseem ceeb.
Cov yam ntxwv tseem ceeb ntawm cellulose ethers
Cellulose ethers yog ib hom polymer uas tau los ntawm kev kho tshuaj ntawm ntuj cellulose.Feem ntau cov cellulose ethers muaj xws li hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), carboxymethylcellulose (CMC) thiab lwm yam. Lawv muaj peev xwm solubility zoo thiab thickening, thiab muaj peev xwm tsim ib tug uniform thiab ruaj khov colloidal daws nyob rau hauv dej.Cov khoom no ua rau cellulose ethers dav siv hauv cov khoom siv hauv tsev.
Cov khoom tseem ceeb ntawm cellulose ethers muaj xws li:
Thickening: tuaj yeem nce viscosity ntawm cov kua tshuab.
Kev tuav dej: Nws muaj peev xwm khaws dej tau zoo heev thiab tuaj yeem ua kom tsis txhob poob dej thaum lub sijhawm tsim kho.
Film-forming zog: Nws tuaj yeem tsim cov yeeb yaj kiab zoo ib yam ntawm cov khoom siv los tiv thaiv thiab txhim kho nws.
Lubricity: Txhim kho kev tsim kho ntawm mortar, ua kom yooj yim rau kev thov thiab zoo li.
Lub luag haujlwm tseem ceeb ntawm cellulose ether hauv mortar
Lub luag haujlwm ntawm cellulose ether nyob rau hauv mortar yog feem ntau xav txog hauv cov hauv qab no:
1. Txhim kho dej tuav
Mortar yog qhov ua rau muaj zog poob thiab tawg teeb meem vim dej poob thaum tsim kho.Cellulose ether muaj cov dej tuav tau zoo thiab tuaj yeem tsim cov qauv sib txuas hauv cov mortar txhawm rau txhawm rau ya raws thiab txo cov dej evaporation thiab poob, yog li txhim kho cov dej tuav ntawm cov tshuaj khib.Qhov no tsis tsuas yog ncua sij hawm qhib lub mortar, tab sis kuj xyuas kom meej tias lub mortar yog tag nrho hydrated thaum lub sij hawm hardening txheej txheem, txhim khu nws lub zog thiab durability.
2. Txhim kho kev tsim kho kev ua haujlwm
Lub lubricating nyhuv ntawm cellulose ether ua rau lub mortar smoother thaum lub sij hawm tsim kho, yooj yim mus thov thiab kis, thiab txhim kho kev tsim kho efficiency.Nyob rau tib lub sijhawm, cov cuab yeej thickening ntawm cellulose ether ua rau cov mortar muaj thixotropy zoo, uas yog, nws yuav thinner thaum raug shear quab yuam thiab rov qab mus rau nws cov viscosity qub tom qab lub shear quab yuam ploj.Cov yam ntxwv no ua rau cov mortar tsis tshua muaj sag thaum lub sij hawm tsim kho thiab tuav ib qho kev tsim kho zoo.
3. Ua kom cov adhesion ntawm mortar
Cellulose ether tuaj yeem tsim cov qauv sib xws hauv cov tshuaj khib nyiab, ua kom cov nplaum nplaum ntawm cov tshuaj khib nyiab, thiab txhim kho nws cov adhesion rau substrate.Qhov no tuaj yeem tiv thaiv cov mortar los ntawm kev sib cais los ntawm cov khoom siv thaum lub sij hawm hardening txheej txheem thiab txo qhov tshwm sim ntawm cov teeb meem zoo xws li hollowing thiab ntog tawm.
4. Txhim kho kev tawg tsis kam
Cov cuab yeej ua yeeb yaj kiab ntawm cellulose ether tso cai rau lub mortar los ua ib zaj duab xis nyias ntawm qhov chaw thaum lub sij hawm hardening txheej txheem, uas plays lub luag hauj lwm tiv thaiv thiab txo qhov cuam tshuam ntawm sab nraud ib puag ncig ntawm lub mortar.Nyob rau tib lub sijhawm, cov dej tuav thiab cov khoom thickening kuj tuaj yeem txo cov kab nrib pleb uas tshwm sim los ntawm cov dej poob hauv cov tshuaj khib nyiab thiab txhim kho nws cov kev sib tsoo.
Cov teebmeem tshwj xeeb ntawm cellulose ethers ntawm mortar zog
Qhov tshwj xeeb cuam tshuam ntawm cellulose ether ntawm kev ua haujlwm ntawm mortar tuaj yeem txheeb xyuas kom meej los ntawm cov hauv qab no:
1. Ua haujlwm tau
Mortar ntxiv nrog cellulose ether ua tau zoo dua ntawm kev ua haujlwm.Nws cov dej tuav tau zoo thiab lubricity ua rau cov mortar smoother thaum tsim kho, yooj yim rau kev khiav lag luam, thiab tsis yooj yim rau kev tsim kho.Nyob rau tib lub sijhawm, cov nyhuv thickening ntawm cellulose ether tuaj yeem txhim kho cov thixotropy ntawm mortar, kom cov mortar tuaj yeem tswj nws cov duab zoo thaum tsim kho thiab tsis yooj yim rau sag thiab sag.
2. Lub zog
Cov dej tuav ntawm cellulose ether ua rau cov mortar kom muaj dej txaus thaum lub sij hawm hardening txheej txheem, txhawb cov hydration cov tshuaj tiv thaiv ntawm cement, thiab ua ib tug nruj dua hydration khoom qauv, yog li txhim kho lub zog ntawm lub mortar.Tsis tas li ntawd, kev faib tawm thiab kev sib txuas ntawm cov cellulose ether tuaj yeem ua rau cov qauv sab hauv ntawm cov mortar ruaj khov, txo qhov tshwm sim ntawm micro-cracks, thiab txhim kho tag nrho lub zog.
3. Durability
Vim tias cellulose ether tuaj yeem tswj tau cov dej noo hauv cov tshuaj khib nyiab, cov tshuaj khib nyiab tuaj yeem tsim cov qauv zoo sib xws thaum lub sij hawm hardening txheej txheem, txo qhov tshwm sim ntawm shrinkage tawg, yog li txhim kho lub durability ntawm mortar.Cov yeeb yaj kiab tsim los ntawm cellulose ether kuj tuaj yeem tiv thaiv cov tshuaj khib nyiab rau qee qhov, txo qhov kev yaig ntawm cov tshuaj khib los ntawm ib puag ncig sab nraud, thiab txhim kho nws cov kav ntev.
4. Dej tuav thiab tawg tsis kam
Cellulose ether tuaj yeem txhim kho cov dej khaws cia ntawm mortar, tso cai rau cov mortar kom muaj dej txaus thaum lub sij hawm hardening txheej txheem thiab txo qhov tshwm sim ntawm shrinkage tawg.Tsis tas li ntawd, zaj duab xis-tsim cov cuab yeej ntawm cellulose ether tso cai rau lub mortar los ua ib qho kev tiv thaiv zaj duab xis rau ntawm qhov chaw, txo cov kev cuam tshuam ntawm sab nraud ib puag ncig ntawm lub mortar thiab txhim kho nws cov kab nrib pleb.
Kev siv cellulose ether hauv mortar muaj qhov cuam tshuam loj heev.Nws cov dej tuav tau zoo heev, thickening, zaj duab xis-tsim thiab lubricity tau txhim kho qhov kev tsim kho, lub zog, durability thiab lwm yam ntawm cov mortar.Yog li ntawd, cellulose ether, raws li ib qho tseem ceeb additive, tau dav siv nyob rau hauv niaj hnub tsev cov ntaub ntawv thiab tau dhau los ua ib qho tseem ceeb txhais tau tias los txhim kho kev ua tau zoo ntawm mortar.
Post lub sij hawm: Lub Xya hli ntuj-12-2024