Cellulose ether yog ib yam khoom siv tshuaj tseem ceeb uas siv dav hauv cov hmoov av hauv cov haujlwm tsim kho. Nws yog ib hom cellulose derivatives uas tau hloov kho los ntawm cov pab pawg hydroxyl ntawm cov cellulose molecules, suav nrog hydroxypropylmethylcellulose (HPMC), methylcellulose (MC), hydroxyethylcellulose (HEC), thiab lwm yam. Cov cellulose ethers no muaj ntau yam haujlwm thiab cov khoom zoo heev, ua rau lawv muaj txiaj ntsig zoo hauv cov av tsim kho.
(1) Txhim kho kev ua tau zoo ntawm kev tsim kho
1. Txhim kho kev ua haujlwm tau zoo
Cov cellulose ethers ua haujlwm ua cov khoom ua kom tuab thiab cov neeg sawv cev khaws dej hauv cov mortar. Nws tuaj yeem txhim kho qhov viscosity thiab thixotropy ntawm mortar, ua rau nws yooj yim rau kev nthuav dav thiab du, yog li txhim kho qhov yooj yim thiab kev ua haujlwm ntawm kev tsim kho. Tsis tas li ntawd, cellulose ether tuaj yeem tiv thaiv cov mortar los ntawm kev sib cais thaum lub sijhawm tsim kho, ua kom ntseeg tau tias cov mortar sib xws thiab lo zoo dua.
2. Txhim kho qhov adhesion ntawm mortar
Cellulose ether tuaj yeem txhim kho qhov kev sib txuas ntawm cov mortar rau lub substrate. Qhov no tseem ceeb heev rau cov txheej txheem xws li tiling lossis plastering uas xav tau kev sib txuas zoo nrog lub substrate. Cellulose ether tso cai rau cov mortar kom tswj tau qhov kev sib txuas zoo hauv qhov chaw noo noo lossis qhuav, zam cov teeb meem ntawm kev poob thiab tawg los ntawm kev sib txuas tsis txaus.
(2) Txhim kho cov khoom siv lub cev ntawm cov mortar
1. Txhim kho kev khaws dej
Kev khaws dej yog ib qho tseem ceeb ntawm cellulose ether, uas tso cai rau cov mortar kom khaws cov dej noo txaus ua ntej ua kom tawv. Cov yam ntxwv no tuaj yeem tiv thaiv kev ua kom qhuav ntawm cov dej thiab txo cov dej poob hauv cov mortar, yog li txhim kho qhov txaus ntawm cov tshuaj tiv thaiv cement hydration thiab txhawb kev txhim kho ntawm lub zog thiab kev ruaj khov ntawm cov mortar.
2. Ua kom lub zog ntawm cov mortar zoo dua
Los ntawm cov nyhuv khaws dej ntawm cellulose ether, cov cement hauv cov mortar tuaj yeem hydrated tag nrho los tsim cov khoom hydration muaj zog dua. Qhov no pab txhim kho lub zog compressive thiab flexural ntawm cov mortar. Tsis tas li ntawd, cellulose ether kuj tseem tuaj yeem txo cov kab nrib pleb los ntawm kev ntsws ntawm cov mortar thaum lub sijhawm hardening thiab tswj lub zog tag nrho thiab kev ruaj khov ntawm cov mortar.
3. Txhim kho kev tiv thaiv khov-thaw
Cov cellulose ethers ua rau cov mortar ntom ntom dua, ua rau nws tiv taus cov voj voog khov-thaw. Qhov kev tiv thaiv khov-thaw no yog qhov tseem ceeb rau cov mortars siv rau hauv thaj chaw txias, uas tuaj yeem ua rau lub neej ua haujlwm ntawm lub tsev ntev dua thiab txo cov nqi kho.
(3) Txhim kho qhov kev hloov pauv ib puag ncig ntawm kev tsim kho
1. Txuas sijhawm qhib
Cov cellulose ethers tuaj yeem ntev lub sijhawm qhib ntawm cov mortar, uas yog, lub sijhawm uas cov mortar tseem ua haujlwm tau tom qab nws tau tso. Qhov no yog qhov tshwj xeeb tshaj yog rau kev tsim kho hauv qhov kub siab lossis qhov chaw qhuav, txo qhov teeb meem ntawm kev tawv ua ntej lub sijhawm ntawm cov mortar uas cuam tshuam rau qhov zoo ntawm kev tsim kho.
2. Txhim kho qhov tsis kam ntawm sag
Thaum tsim kho rau ntawm cov chaw ntsug, cov mortar feem ntau yuav swb lossis sag. Cellulose ether txhim kho qhov kev ua tau zoo tiv thaiv kev sag ntawm cov mortar los ntawm kev ua kom tuab, xyuas kom meej tias cov mortar tuaj yeem txuas ruaj khov rau ntawm cov chaw ntsug thiab zam kev puas tsuaj ntawm kev tsim kho.
(4) Cov txiaj ntsig ntawm kev lag luam thiab kev lag luam
1. Txhim kho kev siv cov khoom siv
Cellulose ether tuaj yeem txhim kho qhov kev ua haujlwm thiab kev tsim kho zoo ntawm cov mortar, thiab txo cov khoom pov tseg thaum lub sijhawm tsim kho. Qhov no muaj qhov tseem ceeb ntawm kev lag luam rau kev tsim kho loj hauv cov haujlwm tsim kho, uas tuaj yeem txo cov nqi khoom siv thiab txhim kho cov txiaj ntsig kev lag luam ntawm kev tsim kho.
2. Ib puag ncig zoo
Cellulose ethers yog cov khoom siv bio-based thiab muaj kev cuam tshuam tsawg dua rau ib puag ncig thaum lub sijhawm tsim khoom thiab siv. Tsis tas li ntawd, nws tuaj yeem txo cov pa phem thib ob thaum lub sijhawm tsim cov mortar, xws li hmoov av thiab pov tseg, thiab ua tau raws li qhov yuav tsum tau ua ntawm cov tsev ntsuab niaj hnub.
(5) Cov piv txwv tshwj xeeb ntawm daim ntawv thov
1. Cov nplaum rau pobzeb
Hauv cov nplaum rau cov vuas ceramic, qhov ntxiv ntawm cellulose ether tuaj yeem txhim kho qhov ua haujlwm tau zoo, kev khaws dej thiab lub zog sib txuas ntawm cov nplaum, thiab txhim kho cov nyhuv sib txuas thiab kev tsim kho zoo ntawm cov vuas ceramic.
2. Cov tshuaj nplaum phab ntsa
Cellulose ether hauv cov plastering mortar txhim kho kev ua haujlwm thiab kev tiv thaiv kev qaug zog ntawm cov mortar, ua kom ntseeg tau tias qhov du thiab zoo ntawm cov txheej plastering, thiab txo cov qhov tsis zoo ntawm kev tsim kho thiab kev kho.
3. Cov tshuaj nplaum uas nws tus kheej siv tau
Cellulose ether nyob rau hauv cov mortar uas nws tus kheej leveling pab txhim kho qhov fluidity thiab dej tuav ntawm cov mortar, uas tso cai rau nws kom nws level lub av thiab txhim kho qhov tiaj tus thiab kev tsim kho zoo ntawm lub av.
Hauv kev xaus, cellulose ether muaj qhov zoo tseem ceeb hauv kev siv cov hmoov mortar hauv cov haujlwm tsim kho. Nws tsis tsuas yog txhim kho kev ua tau zoo ntawm kev tsim kho thiab cov khoom siv lub cev ntawm mortar, tab sis kuj txhim kho kev hloov pauv ib puag ncig thiab cov txiaj ntsig kev lag luam ntawm kev tsim kho. Kev siv cellulose ether txhim kho qhov zoo thiab kev ruaj khov ntawm cov mortar tsim kho thiab txhawb kev txhim kho kev tsim kho kom ruaj khov. Nrog rau kev nce qib tas mus li ntawm cov thev naus laus zis tsim kho, cellulose ether yuav muaj kev cia siab dav dua hauv mortar thiab dhau los ua cov khoom siv tseem ceeb thiab tseem ceeb rau kev tsim kho niaj hnub.
Lub sijhawm tshaj tawm: Lub Xya Hli-02-2024