Hydroxypropyl methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, tshwj xeeb tshaj yog hauv kev tsim cov ntaub ntawv cement. Nws lub luag haujlwm tseem ceeb suav nrog kev txhim kho cov dej khaws cia, ua kom tuab thiab cov khoom siv hauv kev tsim kho thiab txhim kho cov khoom siv kho tshuab ntawm cov ntaub ntawv.
1. Kev txhim kho kev ua haujlwm ntawm kev khaws dej
HPMC muaj cov yam ntxwv zoo heev rau kev khaws dej. Hauv cov ntaub ntawv ua los ntawm cement, kev poob dej ua ntej lub sijhawm tuaj yeem cuam tshuam rau qhov kev ua kom cov cement noo, ua rau lub zog tsis txaus, tawg, thiab lwm yam teeb meem zoo. HPMC tuaj yeem tiv thaiv kev ntws tawm ntawm cov dej noo los ntawm kev tsim cov zaj duab xis polymer ntom ntom hauv cov ntaub ntawv, yog li ua kom lub sijhawm ua kom cov cement noo ntev dua. Qhov kev ua tau zoo ntawm kev khaws dej no yog qhov tseem ceeb tshwj xeeb hauv qhov kub thiab txias lossis qhov chaw qhuav, thiab tuaj yeem txhim kho qhov kev tsim kho thiab kev saib xyuas zoo ntawm cov mortar, concrete thiab lwm yam ntaub ntawv.
2. Txhim kho kev tsim kho thiab kev ua haujlwm tau zoo
HPMC yog ib qho khoom ua kom tuab zoo. Ntxiv me ntsis HPMC rau cov khoom siv cement tuaj yeem ua rau cov khoom siv viscosity ntau ntxiv. Kev ua kom tuab pab tiv thaiv cov slurry los ntawm delaminating, sagging lossis los ntshav thaum siv, thaum ua rau cov khoom yooj yim nthuav thiab tiaj tus. Tsis tas li ntawd, HPMC muab cov khoom siv lo rau zoo, txhim kho qhov lo ntawm cov mortar rau ntawm cov khoom siv hauv paus, thiab txo cov khoom pov tseg thaum lub sijhawm tsim kho thiab kho tom qab.
3. Kev txhim kho ntawm kev tiv thaiv kab nrib pleb
Cov ntaub ntawv ua los ntawm cement feem ntau yuav tawg vim yog dej ua pa thiab qhov ntim me me thaum lub sijhawm ua kom tawv. Cov yam ntxwv khaws dej ntawm HPMC tuaj yeem ua rau cov khoom siv yas ntev dua thiab txo qhov kev pheej hmoo ntawm cov kab nrib pleb me me. Tsis tas li ntawd, HPMC ua rau muaj kev ntxhov siab sab hauv los ntawm kev ua kom lub zog sib txuas thiab kev ywj pheej ntawm cov ntaub ntawv, txo qhov tshwm sim ntawm cov kab nrib pleb. Qhov no yog qhov tseem ceeb tshaj plaws rau cov mortars nyias nyias thiab cov ntaub ntawv hauv pem teb uas nws tus kheej.
4. Txhim kho kev ruaj khov thiab kev tiv thaiv khov-thaw
HPMCtuaj yeem txhim kho qhov ceev ntawm cov ntaub ntawv cement thiab txo qhov porosity, yog li txhim kho cov khoom siv impermeability thiab tshuaj corrosion tsis kam. Hauv qhov chaw txias, qhov khov-thaw tsis kam ntawm cov ntaub ntawv yog ncaj qha cuam tshuam rau lawv lub neej kev pabcuam. HPMC qeeb qeeb qhov kev puas tsuaj ntawm cov ntaub ntawv cement thaum lub sijhawm khov-thaw thiab txhim kho lawv lub zog los ntawm kev khaws dej thiab txhim kho lub zog sib txuas.
5. Txhim kho cov khoom siv kho tshuab
Txawm hais tias lub luag haujlwm tseem ceeb ntawm HPMC tsis yog los ua kom lub zog ncaj qha, nws tsis ncaj qha txhim kho cov khoom siv kho tshuab ntawm cov khoom siv cement. Los ntawm kev ua kom zoo dua qhov khaws dej thiab kev ua haujlwm tau zoo, HPMC ua rau cov cement hydrates ntau dua thiab tsim cov qauv khoom hydration denser, yog li txhim kho cov khoom siv lub zog compressive thiab flexural zog. Tsis tas li ntawd, kev ua haujlwm zoo thiab cov khoom sib txuas interfacial pab txo cov teeb meem kev tsim kho, yog li tag nrho txhim kho kev ua haujlwm ntawm cov khoom siv.
6. Cov piv txwv ntawm daim ntawv thov
HPMC siv dav hauv cov masonry mortar, plastering mortar, self-leveling mortar, vuas nplaum thiab lwm yam khoom hauv cov haujlwm tsim kho. Piv txwv li, ntxiv HPMC rau cov vuas nplaum ceramic tuaj yeem txhim kho lub zog sib txuas thiab lub sijhawm qhib kev tsim kho; ntxiv HPMC rau plastering mortar tuaj yeem txo qhov los ntshav thiab sagging, thiab txhim kho cov nyhuv plastering thiab kev tiv thaiv tawg.
Hydroxypropyl methylcellulosetuaj yeem txhim kho kev ua tau zoo ntawm cov ntaub ntawv ua los ntawm cement hauv ntau yam. Nws cov dej tuav, tuab, tiv taus tawg thiab cov khoom ruaj khov tau txhim kho qhov zoo ntawm kev tsim kho thiab kev ua tau zoo ntawm cov ntaub ntawv ua los ntawm cement. Qhov no tsis yog tsuas yog pab txhim kho qhov zoo ntawm qhov project, tab sis kuj txo cov nqi tsim kho thiab kev saib xyuas. Yav tom ntej, nrog rau kev txhim kho cov thev naus laus zis ntawm cov ntaub ntawv tsim kho, cov kev cia siab ntawm daim ntawv thov ntawm HPMC yuav dav dua.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-21-2024