Kev siv cov cellulose ethers hauv masonry thiab plastering mortar yog ib qho tseem ceeb hauv kev tsim kho niaj hnub no. Nws tsis tsuas yog txhim kho kev ua haujlwm ntawm kev tsim kho thiab kev sib txuas ntawm cov mortar, tab sis kuj txhim kho nws cov dej tuav, kev ua haujlwm tau zoo thiab cov khoom tiv thaiv kev poob qis, yog li ua rau kev tsim kho zoo dua thiab kev zoo ntawm lub tsev zoo dua.
1. Kev txhais thiab hom cellulose ethers
Cellulose ethers yog ib chav kawm ntawm cov tshuaj tsis-ionic lossis ionic polymer sib xyaw ua los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj. Nws muaj cov dej solubility zoo thiab cov khoom tsim zaj duab xis thiab feem ntau siv rau hauv kev tsim kho, tshuaj, khoom noj, tshuaj txhua hnub thiab lwm yam teb. Hauv kev tsim cov mortar, cov cellulose ethers feem ntau siv yog:
Hydroxypropyl methylcellulose (HPMC)
Methyl hydroxyethyl cellulose (MHEC)
HPMC feem ntau siv rau hauv masonry thiab plastering mortar vim nws khaws dej zoo, thermal stability siab thiab kev ua tau zoo heev.
2. Lub luag haujlwm ntawm cellulose ether hauv masonry mortar
Cov tshuaj khib masonry yog siv los txuas cov khoom siv masonry xws li cib thiab pob zeb. Nws xav kom cov tshuaj khib muaj kev sib txuas zoo thiab khaws dej kom tiv thaiv cov dej noo kom tsis txhob raug cov cib nqus sai thaum lub sijhawm tsim kho, yog li cuam tshuam rau qhov cuam tshuam ntawm kev sib txuas.
Txhim kho kev khaws dej
Cellulose ether muaj peev xwm khaws dej tau zoo thiab tuaj yeem tsim ib daim zaj duab xis zoo hauv cov mortar kom kaw cov dej noo thiab tiv thaiv cov dej noo kom tsis txhob nqus sai dhau thaum lub sijhawm ua masonry. Qhov no pab cov cement kom hydrate tag nrho, yog li txhim kho lub zog thiab kev nplaum ntawm cov mortar.
Txhim kho kev ua tau zoo ntawm kev tsim kho
Tom qab ntxiv cellulose ether, cov masonry mortar yog lubricated ntau dua thiab du, nrog rau kev xav zoo txog kev tsim kho, thiab txo cov teeb meem zoo xws li hollowing thiab tawg.
Txhim kho kev ua haujlwm ntawm kev sib txuas
Kev khaws dej zoo thiab ua kom tuab ua rau cov mortar yooj yim dua los lo rau ntawm qhov chaw ntawm cov cib thiab pob zeb, tsis yooj yim poob, thiab txhim kho kev ua haujlwm ntawm masonry.
3. Lub luag haujlwm ntawm cellulose ether hauv plaster mortar
Cov plaster mortar feem ntau yog siv rau kev sib npaug thiab kho kom zoo nkauj ntawm phab ntsa tsev, thiab muaj cov kev xav tau siab dua rau kev ua haujlwm ntawm kev tsim kho thiab qhov zoo ntawm qhov chaw.
Tswj cov dej noo ntawm cov cement
Hauv cov plaster mortar, cellulose ether tuaj yeem ncua qhov dej poob thiab ua rau cov cement hydration tiav dua, yog li ua rau muaj zog thiab txo cov kab nrib pleb shrinkage.
Tiv thaiv kom tsis txhob sagging thiab txhim kho kev ua tau zoo ntawm kev tsim kho facade
Vim yog qhov ua kom tuab zoo ntawm cellulose ether, nws tuaj yeem tiv thaiv cov plaster mortar los ntawm sagging thaum nws raug tsim rau ntawm qhov chaw ntsug, txhim kho kev ua haujlwm.
Txhim kho kev ua haujlwm tau zoo
Cellulose ether ua rau cov plaster mortar yooj yim dua rau kev du thiab ua tiav, txhim kho kev ua haujlwm ntawm kev tsim kho thiab qhov zoo ntawm qhov chaw, thiab ua rau qhov chaw du thiab mos dua.
Kev tiv thaiv kab nrib pleb zoo dua
Qhov kev txhim kho ntawm kev tuav dej thiab kev ywj pheej pab txhim kho qhov kev tiv thaiv kab nrib pleb ntawm cov txheej plaster thiab txo qhov kev pheej hmoo ntawm kev tawg thiab poob.
4. Cov yam ntxwv cuam tshuam rau kev ua tau zoo ntawm cellulose ether
Qhov kev ua tau zoo ntawm cellulose ether muaj feem cuam tshuam nrog nws cov qauv tshuaj lom neeg, qib kev hloov pauv (DS), viscosity, qhov loj me ntawm cov khoom me me thiab lwm yam. Tshwj xeeb:
Qib ntawm kev hloov pauv:cuam tshuam rau nws cov dej yaj thiab qhov nrawm ntawm kev yaj. Feem ntau, qib ntawm kev hloov pauv ntawm 1.4 thiab 1.9 yog qhov tsim nyog dua rau kev tsim kho.
Qhov nplaum:txiav txim siab nws cov nyhuv tuab hauv cov mortar, thiab qhov ntau ntawm viscosity feem ntau yog 400 ~ 100,000 mPa · s.
Qhov loj ntawm cov khoom me me:cuam tshuam rau nws qhov kev tawg thiab qhov nrawm ntawm kev yaj. Qhov me me ntawm cov khoom me me, qhov sai dua nws yaj.
5. Kev siv tshuaj thiab kev ceev faj
Hauv cov pob zeb masonry thiab plastering mortar, qhov ntxiv ntawm cellulose ether feem ntau yog tswj hwm ntawm 0.1% ~ 0.4% (raws li qhov hnyav ntawm cov cement lossis cov ntaub ntawv cementitious). Thaum siv, yuav tsum tau them sai sai rau:
Sib tov kom sib npaug kom tsis txhob muaj kev sib sau ua ke;
Ua tib zoo saib xyuas qhov kub thiab lub sijhawm ntawm cellulose ether;
Kev ua tau zoo ntawm cellulose ethers ntawm ntau hom thiab viscosity qib yog qhov sib txawv heev, thiab qhov piv zoo tshaj plaws yuav tsum tau txiav txim siab los ntawm kev sim.
Ua ib qho khoom ntxiv nrog kev ua tau zoo heev,cellulose ethertau txhim kho qhov kev ua tau zoo ntawm cov masonry thiab plastering mortar, ua rau kev tsim kho ua haujlwm tau zoo dua thiab zoo dua. Nrog rau kev txhim kho cov ntaub ntawv tsim kho ntsuab, qhov kev thov rau cov cellulose ethers uas zoo rau ib puag ncig thiab ua tau zoo yuav txuas ntxiv mus. Hauv kev siv ua haujlwm, kev xaiv hom thiab qauv ntawm cellulose ether thiab kev tswj hwm nws cov koob tshuaj yog qhov tseem ceeb los xyuas kom meej tias cov mortar ua tau raws li cov qauv.
Lub sijhawm tshaj tawm: Tsib Hlis-09-2025