HPMC rau cov khoom siv cement-based mortar

1. Taw qhia rau HPMC

Hydroxypropyl methylcellulose (HPMC) yog non-ionic cellulose ether, uas yog tsim los ntawm ntuj cellulose los ntawm kev hloov tshuaj. HPMC muaj dej solubility zoo, zaj duab xis-forming zog, thickening zog thiab nplaum, yog li nws yog dav siv nyob rau hauv lub tsev cov ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv cement-based mortars.

2. Lub luag haujlwm ntawm HPMC hauv cov cement-based mortar

Thickening nyhuv: HPMC tuaj yeem ua kom qhov sib xws thiab viscosity ntawm cov tshuaj khib thiab txhim kho kev tsim kho. Los ntawm kev ua kom lub cohesion ntawm lub mortar, nws tiv thaiv lub mortar los ntawm ntws thiab txheej thaum lub sij hawm tsim kho.

Cov nyhuv tuav dej: HPMC muaj qhov ua tau zoo ntawm cov dej tuav, uas tuaj yeem tiv thaiv kom tsis txhob poob dej sai hauv cov mortar thiab ncua sij hawm hydration ntawm cov cement, yog li txhim kho lub zog thiab kav ntev ntawm cov mortar. Tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias ib puag ncig, nws cov dej tuav yog qhov tseem ceeb tshwj xeeb.

Txhim kho kev tsim kho: HPMC tuaj yeem ua rau cov mortar muaj kev ua haujlwm zoo thiab lubricity, pab kev tsim kho, thiab txhim kho kev tsim kho. Nyob rau tib lub sijhawm, nws tuaj yeem txo qhov hlwv thiab tawg thaum lub sijhawm tsim kho thiab ua kom muaj kev tsim kho zoo.

Anti-sag: Thaum lub sij hawm siv phab ntsa plastering, HPMC tuaj yeem txhim kho cov tshuaj tiv thaiv ntawm mortar thiab tiv thaiv cov mortar los ntawm zawv zawg rau saum npoo, ua kom kev tsim kho yooj yim dua.

Shrinkage kuj: HPMC tuaj yeem txo qhov qhuav thiab ntub dej ntawm cov tshuaj khib nyiab, txhim kho qhov tawg ntawm cov tshuaj khib nyiab, thiab xyuas kom meej tias qhov chaw ntawm cov mortar txheej tom qab kev tsim kho yog du thiab zoo nkauj.

3. Kev noj tshuaj thiab kev siv ntawm HPMC

Qhov ntau npaum ntawm HPMC hauv cov cement-based mortar feem ntau yog 0.1% txog 0.5%. Cov koob tshuaj tshwj xeeb yuav tsum tau hloov kho raws li hom thiab kev ua tau zoo ntawm cov tshuaj khib nyiab. Thaum siv HPMC, sib tov nrog cov hmoov qhuav ua ntej, ces ntxiv dej thiab do. HPMC muaj solubility zoo thiab tuaj yeem tawg sai sai hauv dej los tsim cov tshuaj sib xyaw colloidal.

4. Kev xaiv thiab khaws cia ntawm HPMC

Kev xaiv: Thaum xaiv HPMC, cov qauv tsim nyog thiab cov lus qhia tshwj xeeb yuav tsum raug xaiv raws li cov kev cai tshwj xeeb ntawm cov mortar. Cov qauv sib txawv ntawm HPMC muaj qhov sib txawv ntawm kev solubility, viscosity, dej tuav, thiab lwm yam, thiab yuav tsum tau xaiv raws li cov kev thov tiag tiag.

Cia: HPMC yuav tsum muab cia rau hauv qhov chaw qhuav, qhov cua, kom deb ntawm cov dej noo thiab kub. Thaum khaws cia, yuav tsum tau them nyiaj tshwj xeeb rau kev sib khi kom tiv thaiv kev sib cuag nrog cov dej noo hauv huab cua, uas yuav cuam tshuam rau nws cov kev ua tau zoo.

5. Daim ntawv thov piv txwv ntawm HPMC hauv cov cement-based mortar

Ceramic pobzeb nplaum: HPMC tuaj yeem ua kom muaj zog sib txuas thiab txhim kho kev tsim kho hauv cov nplais pobzeb nplaum. Nws cov dej tuav tau zoo thiab cov khoom thickening tuaj yeem tiv thaiv cov nplais nplaum los ntawm sagging thiab poob thaum lub sij hawm tsim kho.

Sab nrauv phab ntsa rwb thaiv tsev mortar: HPMC nyob rau sab nrauv phab ntsa rwb thaiv tsev mortar tuaj yeem txhim kho qhov adhesion thiab dej tuav ntawm lub mortar, tiv thaiv cov mortar kom qhuav thiab hollowing tawm thaum lub sij hawm tsim kho thiab tu, thiab txhim kho lub durability thiab stability ntawm sab nrauv phab ntsa rwb thaiv tsev system.

Self-leveling mortar: HPMC nyob rau hauv tus kheej-leveling mortar tuaj yeem txhim kho cov dej ntws thiab kev ua haujlwm ntawm tus kheej ntawm cov mortar, txo cov npuas npuas, thiab xyuas kom meej qhov flatness thiab smoothness ntawm av tom qab kev tsim kho.

6. Lub zeem muag ntawm HPMC hauv cov cement-based mortar

Nrog rau kev txhim kho txuas ntxiv ntawm kev tsim kho kev lag luam, daim ntawv thov ntawm cov khoom siv cement-based mortar tau dhau los ua ntau thiab ntau dua, thiab cov kev xav tau rau nws cov kev ua tau zoo kuj tau nce siab dua. Raws li ib qho tseem ceeb ntxiv, HPMC tuaj yeem txhim kho kev ua haujlwm ntawm mortar thiab ua tau raws li cov kev xav tau ntawm kev tsim kho niaj hnub. Nyob rau hauv lub neej yav tom ntej, nrog rau kev nce qib ntawm technology thiab kev lag luam xav tau, daim ntawv thov kev cia siab ntawm HPMC nyob rau hauv cement-based mortar yuav dav dua.

Daim ntawv thov ntawm HPMC nyob rau hauv cov cement-based mortar tau zoo heev txhim kho kev tsim kho kev ua tau zoo thiab cov nyhuv kawg ntawm cov mortar. Los ntawm kev ntxiv tus nqi tsim nyog ntawm HPMC, kev ua haujlwm tau zoo, kev tuav dej, kev sib txuas thiab kev sib tsoo ntawm cov mortar tuaj yeem txhim kho tau zoo, ua kom muaj kev tsim kho zoo thiab kav ntev. Thaum xaiv thiab siv HPMC, kev sib txuam tsim nyog thiab kev tswj xyuas kev tshawb fawb yuav tsum tau ua raws li cov ntawv thov tshwj xeeb los muab kev ua si tag nrho rau nws qhov kev ua tau zoo tshaj plaws thiab ua tau raws li ntau yam kev xav tau ntawm kev tsim vaj tsev.