Cov nyhuv ntawm methyl hydroxyethyl cellulose (MHEC) rau ntawm cov mortar

Methyl hydroxyethyl cellulose (MHEC)yog ib qho cellulose ether uas tsis yog ionic siv dav hauv kev tsim cov mortar. Vim nws ua kom tuab zoo, khaws dej tau zoo, ua haujlwm tau zoo thiab sib xws, MHEC tau dhau los ua ib qho ntawm cov khoom ntxiv tseem ceeb hauv cov mortar qhuav, tshwj xeeb tshaj yog hauv cov nplaum pobzeb, plaster mortar, floor mortar, self-leveling mortar thiab lwm yam khoom.

1. Mechanism ntawm kev txiav txim ntawm MHEC hauv mortar

MHEC, ua ib yam khoom siv polymer uas yaj tau hauv dej, tuaj yeem tsim cov kua dej uas sib xyaw ua ke lossis colloid hauv cov mortar. Thaum nws raug ntxiv rau hauv cov mortar qhuav thiab kov dej, MHEC sai sai hydrates thiab yaj, yog li cuam tshuam rau cov khoom rheological ntawm cov mortar, cov txheej txheem cement hydration, kev khaws dej thiab cov khoom sib txuas. Nws cov txheej txheem tseem ceeb ntawm kev ua haujlwm suav nrog cov ntsiab lus hauv qab no:

Cov nyhuv ua kom tuab: MHEC tsim cov kua nplaum siab tom qab yaj hauv dej, uas tuaj yeem ua rau kom cov nplaum ntawm lub cev mortar ntau ntxiv, yog li ua kom zoo dua qhov kev xav ntawm kev tsim kho thiab cov khoom tiv thaiv kev sagging;

Cov nyhuv ntawm kev khaws dej: MHEC muaj peev xwm khaws dej zoo heev, uas tuaj yeem txo qhov poob ntawm cov dej sib tov, xyuas kom meej tias cov cement, gypsum thiab lwm yam khoom siv cementitious tau txais dej tag nrho, thiab txhim kho kev txhim kho lub zog;

Kev txhim kho kev ua haujlwm ntawm lubrication thiab kev tsim kho: Cov cellulose ether molecules muab qee qhov kev nplua nuj hauv lub cev mortar, uas yog qhov zoo rau kev siv thiab kis ntawm mortar thiab txhim kho kev ua haujlwm ntawm kev tsim kho;

Cov nyhuv ntawm kev ruaj khov ntawm cov npuas: MHEC tuaj yeem ruaj khov qee cov npuas thaum lub sijhawm sib tov, thiab cov microbubbles tsim nyog tuaj yeem txhim kho kev ua haujlwm thiab kev khaws dej ntawm cov mortar;

Kev coagulation qeeb: MHEC muaj qee qhov cuam tshuam rau kev ua kom cov cement hydration, uas pab ua kom lub sijhawm ua haujlwm ntev dua.

2. Kev txhim kho tshwj xeeb ntawm kev ua haujlwm ntawm cov mortar los ntawm MHEC

2.1. Kev ua tau zoo dua ntawm kev tsim kho

Kev ua tau zoo ntawm kev tsim cov mortar yog ib qho cim tseem ceeb los ntsuas nws qhov yooj yim siv. MHEC txhim kho qhov kev nplaum thiab lubricity ntawm cov mortar ntub, ua rau nws yooj yim dua rau kev tsim. Tshwj xeeb tshaj yog nyob rau hauv cov nplaum pobzeb thiab plaster mortar, nws tuaj yeem txo qhov sagging thiab txhim kho qhov sib xws ntawm kev siv.

2.2. Kev ua haujlwm zoo dua qub ntawm kev khaws dej

Kev khaws dej yog ib qho ntawm cov yam ntxwv tseem ceeb ntawm MHEC. Hauv cov khoom siv uas muaj qhov dej (xws li cib thiab pob zeb ua vaj tse) lossis cov chaw qhuav uas kub heev, dej yooj yim nqus lossis ua pa sai sai, cuam tshuam rau cov tshuaj tiv thaiv cement. MHEC ua kom cov dej noo noo los ntawm kev tsim cov zaj duab xis dej, txo cov dej ntws thiab cov dej ntsws, thiab txhim kho lub zog thiab kev nplaum ntawm cov mortar.

2.3. Kev sib txuas zoo dua

MHEC txhim kho qhov sib npaug thiab cov dej noo ntawm cov mortar, tsim kom muaj cov qauv sib txuas ruaj khov dua ntawm mortar thiab substrate thiab cov khoom siv saum npoo (xws li cov vuas), uas pab txhim kho lub zog sib txuas. Tshwj xeeb tshaj yog nyob rau hauv cov nplaum vuas ua haujlwm siab, MHEC tuaj yeem ua haujlwm sib koom tes nrog cov polymer emulsions (xws li cov hmoov latex redispersible).

2.4. Txhim kho kev ua haujlwm tiv thaiv kev sagging

Thaum lub sijhawm tsim kho lub ntsej muag, cov pob zeb mortar feem ntau yuav poob vim yog lub ntiajteb txawj nqus, uas cuam tshuam rau kev tswj qhov tuab thiab kev zoo nkauj. MHEC muab kev ua tau zoo heev los tiv thaiv kev poob qis, uas tso cai rau cov pob zeb mortar kom khaws nws cov duab ntawm phab ntsa, uas yog qhov tseem ceeb tshwj xeeb rau cov vuas loj thiab cov txheej tuab.

2.5. Txhim kho kev ruaj khov ntawm kev khaws cia thiab kev ua kom cov hmoov qhuav zoo

MHEC zoo muaj cov hmoov qhuav zoo thiab sib xyaw ua ke, tsis yooj yim rau agglomerate, thiab zoo rau kev tsim cov tshuaj ruaj khov thiab khaws cia cov khoom siv mortar mus sij hawm ntev.

3. Cov yam ntxwv ntawm kev siv MHEC hauv cov txheej txheem sib txawv ntawm cov mortar

Cov nplaum pobzeb

MHEC txhim kho kev ua tau zoo ntawm kev tsim kho, kev tiv thaiv kev plam thiab lub sijhawm qhib, thiab txhim kho kev lo rau cov vuas.

Cov Pob Zeb Plaster

Txhim kho qhov du ntawm kev khawb, txhim kho kev khaws dej, thiab tiv thaiv hmoov thiab tawg.

Cov av nplaum hauv pem teb

Txhim kho qhov fluidity thiab kev ua tau zoo ntawm tus kheej kom ntseeg tau tias cov tuab sib npaug.

Cov Mortar Uas Ua Rau Nws Tus Kheej Zoo Li Qub

Tswj kev fluidity, tiv thaiv kev sib cais, thiab xyuas kom meej qhov chaw tiaj tus.

Cov Tshuaj Mortar Thermal Insulating

Hauv cov txheej txheem rwb thaiv tsev uas tsis hnyav, MHEC ua kom muaj kev faib tawm ntawm cov slurry sib npaug, txhim kho kev sib txuas thiab kev khaws dej.

4. Cov kev ceev faj rau kev siv

Kev tswj tus nqi ntxiv: Tus nqi ntxiv ntawm MHEC feem ntau yog 0.2% ~ 0.5%, uas yuav tsum tau hloov kho raws li cov qauv thiab cov kev cai tsim kho;

Cov kev cai ntawm kev tawg: Yuav kom muab kev ua si tag nrho rau nws qhov kev ua tau zoo, MHEC yuav tsum tau tawg kom sib npaug thaum lub sijhawm sib tov;

Kev Sib Xws Nrog Lwm Cov Tshuaj Ntxiv: Yuav tsum tau ceev faj txog kev sib koom tes ntawm MHEC nrog cov hmoov latex, retarder, defoamer thiab lwm yam tshuaj ntxiv kom tsis txhob muaj kev cuam tshuam sib xws.

Methyl hydroxyethyl cellulose, ua ib qho cellulose ether nrog kev ua tau zoo tshaj plaws, qhia txog qhov muaj txiaj ntsig zoo heev hauv lub cev mortar. Nws tsis tsuas yog txhim kho kev ua tau zoo ntawm kev tsim kho, kev ruaj khov ntawm lub cev thiab lub zog kawg ntawm cov mortar, tab sis kuj ua lub luag haujlwm tseem ceeb hauv kev txhawb nqa kev lag luam thiab kev ntsuab ntawm cov khoom siv mortar qhuav. Thaum cov ntaub ntawv tsim kho txhim kho mus rau kev ua tau zoo thiab kev tiv thaiv ib puag ncig,daim ntawv thov ntawm MHEC yuav dav dua thiab tob dua.