Cellulose ether (Hydroxypropyl Methylcellulose, HPMC luv luv) yog ib qho tseem ceeb multifunctional tshuaj uas yog dav siv nyob rau hauv lub tsev cov ntaub ntawv, tshwj xeeb tshaj yog nyob rau hauv phab ntsa putty mortar.
1. Thickening nyhuv
Lub luag haujlwm tseem ceeb ntawm HPMC hauv putty mortar yog thickening. Nws tuaj yeem ua kom cov viscosity ntawm mortar thiab txhim kho kev ua haujlwm ntawm mortar. Kev ua haujlwm zoo txhais tau hais tias cov mortar yooj yim dua rau kev sib kis thiab khawb thaum lub sijhawm tsim kho, yog li txhim kho kev tsim kho thiab ua haujlwm zoo. Cov nyhuv thickening tuaj yeem tiv thaiv cov mortar los ntawm sagging ntawm cov phab ntsa ntsug, kom ntseeg tau tias siv cov khoom siv thiab kev tsim kho zoo thaum lub sijhawm tsim kho.
2. Dej tuav nyhuv
Kev tuav dej yog lwm lub luag haujlwm tseem ceeb ntawm HPMC hauv putty mortar. Kev tuav dej yog hais txog cov khoom muaj peev xwm khaws cov dej noo thaum tsim kho. HPMC tuaj yeem txhim kho cov dej khaws cia ntawm mortar thiab txo cov dej poob, yog li ua kom cov cement thiab lwm cov ntaub ntawv cementitious muaj dej txaus rau cov tshuaj tiv thaiv dej thaum lub sijhawm kho. Qhov no yog qhov tseem ceeb tshwj xeeb los tiv thaiv cov teeb meem xws li cov kab nrib pleb thiab hollows los ntawm kev ziab sai heev. Tsis tas li ntawd, kev tuav dej zoo kuj tseem tuaj yeem txuas ntxiv lub sijhawm qhib ntawm mortar, muab sijhawm rau cov neeg ua haujlwm tsim kho ntau dua.
3. Txhim kho kev tsim kho kev ua haujlwm
HPMC tuaj yeem txhim kho kev tsim kho kev ua haujlwm ntawm putty mortar, uas yog qhov tshwj xeeb cuam tshuam hauv cov hauv qab no:
Slipperiness: HPMC txhim kho lubricity ntawm mortar, ua cov cuab yeej siv smoother thaum lub sijhawm ua haujlwm, txo kev tsim kho thiab txhim kho kev tsim kho.
Adhesion: Txhim kho lub zog sib txuas ntawm cov mortar thiab cov khoom siv hauv paus kom tsis txhob mortar poob.
Anti-sag: Txhim kho qhov ruaj khov ntawm mortar ntawm phab ntsa ntsug thiab tiv thaiv mortar los ntawm sagging los yog zawv zawg vim lub ntiajteb txawj nqus.
4. Txhim khu kev ua haujlwm tawg
Vim tias cov dej khaws cia ntawm HPMC, cov tshuaj khib nyiab tuaj yeem tswj tau cov dej noo txaus thaum lub sijhawm kho, ua kom cov dej sib npaug sib npaug, thiab txo cov kev ntxhov siab vim los ntawm qhov qhuav shrinkage, yog li txo qhov tshwm sim ntawm cov kab nrib pleb. Tsis tas li ntawd, HPMC tuaj yeem ua kom cov elastic modulus ntawm mortar, txhim kho nws yooj yim, thiab ntxiv txhim khu kev tiv thaiv tawg.
5. Txhim kho hnav tsis kam
HPMC tuaj yeem txhim kho qhov hnav tsis kam ntawm putty mortar. Cov zaj duab xis tsim nyob rau hauv lub mortar muaj zoo toughness thiab adhesion, ua rau kho mortar nto tougher thiab nrog zoo hnav tsis kam. Qhov no yog qhov tseem ceeb heev rau lub sijhawm ntev thiab kev zoo nkauj ntawm phab ntsa.
6. Txhim kho Frost tsis kam
Nyob rau hauv cov cheeb tsam txias, Frost tsis kam ntawm putty mortar yog ib qho tseem ceeb xav txog. HPMC tuaj yeem txhim kho cov Frost tsis kam ntawm mortar. Los ntawm nce kev ntom ntom sab hauv thiab tawv ntawm lub tshuaj khib, nws tuaj yeem txo cov qauv kev tsim kho los ntawm cov khoom siv khov, yog li txuas ntxiv lub neej ntawm phab ntsa kom zoo nkauj.
7. Txhawb kev sib cais tsis sib xws
Thaum lub sij hawm sib tov txheej txheem ntawm mortar, HPMC pab nyob rau hauv txawm dispersion ntawm lwm cov khoom xyaw. Nws qhov zoo dispersion ua kom cov khoom sib txawv ntawm ntau yam ntawm cov tshuaj khib nyiab thaum lub sij hawm sib tov, yog li txhim kho tag nrho cov kev ua tau zoo thiab kev tsim kho ntawm cov mortar.
8. Txhim khu kev tawg thiab shrinkage kuj
HPMC tuaj yeem txhim kho qhov tawg tsis kam thiab shrinkage tsis kam ntawm putty mortar. Nws cov dej tuav tau zoo thiab cov khoom sib txawv tsis sib xws ua rau cov mortar kom muaj kev ntxhov siab zoo ib yam thaum lub sijhawm kho, txo cov kev ntxhov siab vim los ntawm qhov tsis sib xws kom qhuav thiab kho, yog li txo qhov kev pheej hmoo ntawm cov kab nrib pleb.
Lub luag hauj lwm ntawm cellulose ether HPMC nyob rau hauv phab ntsa putty mortar yog multi-faceted, nrog rau thickening, dej tuav, txhim kho kev tsim kho kev ua tau zoo, txhim kho tawg thiab puas kuj, txhim kho Frost tsis kam, thiab txhawb uniform dispersion. Cov haujlwm no ua ke txhim kho kev tsim kho kev ua haujlwm thiab kev pabcuam lub neej ntawm putty mortar, uas yog qhov tseem ceeb rau kev ua kom cov hniav zoo nkauj thiab kev ruaj ntseg ntawm lub tsev.
Post lub sij hawm: Lub Xya hli ntuj-31-2024