Redispersible looj hmoov (RDP) yog ib qho tseem ceeb ntxiv rau kev sib nphu tus kheej. Nws lub ntsiab tivthaiv yog ib qho hmoov nplej ua los ntawm polymer emulsion los ntawm kev ua tshuaj tsuag. RDP tuaj yeem raug hluav taws xob rau hauv dej los tsim cov emulsion, muab cov tshuaj khib cov khoom zoo. Cov tshuaj xyuas hauv qab no qhov kev cuam tshuam ntawm RDP ntawm kev sib khib tus kheej los ntawm plaub yam: kev ua haujlwm, thev naus laus zis thiab kev ua kom txaus ntshai thiab shrinkage.
1. Txhim Kho Kev Ua Haujlwm
RDP tuaj yeem txhim kho cov kua dej thiab lubricity ntawm kev tshuaj twm kaum tus kheej. Nws cov kev ua si sab nraud tuaj yeem txo qhov kev sib txhuam ntawm lub tshuaj khib nyiab ntawm lub tshuaj khib nyiab, ua kom cov slurry haus ntau dua thiab muaj zog rau kev tsim kho cov haujlwm. Ib qho ntxiv, RDP tuaj yeem nce lub thixotrotropy ntawm lub tshuaj khib, ua kom nws yooj yim kom sib kis thiab ua kom nrawm dua uas cov kev tsim kho kom du thiab tsis muaj kev sib cais.
2. Txhim kho ntawm cov khoom siv me txhua yam
RDP tuaj yeem txhim kho lub zog yooj yooj yim thiab txoj kev ua lub zog ntawm kev sib nphuv tus kheej. Qhov no yog vim tias cov yeeb yaj kiab polymer tsim los ntawm RDP thaum lub sijhawm ua haujlwm ntawm cov tub ntxhais-kiv cua, thiab txhim kho cov khoom tawg tsis kam. Tshwj xeeb tshaj yog nyob rau hauv cov dab neeg khoov, tus yam ntxwv tsis zoo ntawm cov yeeb yaj kiab polymer pab rau kev daws teeb meem kev nyuaj siab, yog li kev txhim kho lub zog yooj yim.
3. Kev txhim kho ntawm kev ua haujlwm durability
RDP tuaj yeem txhim kho lub durability ntawm tus kheej txoj kev npaws txoj kab sib xyaw, uas qhia zoo khov-thaws tsis kam, dej tsis kam thiab alkali tsis kam. Cov yeeb yaj kiab polymer tsim los ntawm RDP muaj dej tsawg vapoy permeability thiab zoo heev tiv thaiv kev ua haujlwm ntawm lub cev cug. Ntxiv rau, RDP kuj tuaj yeem txo cov feem pua carbonancation thiab txhim kho cov khoom ruaj khov rau hauv kev siv ntev ntev.
4. Kev ua kom zoo ntawm shrinkage kev ua tau zoo
Tshuaj khib inevitably shrinks thaum lub sij hawm ua kom tawv nqaij tawv, uas tuaj yeem ua rau cov kab nrib pleb. RDP tuaj yeem daws qhov teeb meem no los ntawm ob lub tshuab:
Cov yeeb yaj kiab polymer ua ib cov qauv network hloov pauv, uas tuaj yeem faib cov txheej txheem kev ntxhov siab ntawm kev ntxhov siab sab hauv los ntawm qhuav shrinkage;
RDP tuaj yeem ua rau cov khoom siv dej ua haujlwm hauv microstructure thiab qeeb ntawm evaporation tus nqi, yog li txo qhov tshwm sim ntawm shrinkage cracks.
Kev ceev faj thiab tsim nyog siv
Txawm hais tias RDP tuaj yeem txhim kho kev ua tau zoo ntawm kev coj ua tus kheej, nws cov tshuaj tswj tau kom tsim nyog. Ntau dhau lawm ntxiv yuav ua rau muaj cov nqi nce thiab cuam tshuam lub zog thaum ntxov; Pheej ntxiv tsis txaus yuav ua rau nws nyuaj ua kom tau qhov kev xav tau kev ua tau zoo. Tsis tas li ntawd, ntau hom khoom siv RDP (xws li cov khoom lag luam raws li ethylene vinyl acetate copolymer lossis acrylate) muaj qhov sib txawv ntawm kev ua tau zoo, thiab hom kev xav tau tsim nyog.
Raws li cov multifunctional polymer additive, RDP ua si lub luag haujlwm tseem ceeb hauv kev txhim kho fluidity, thev naus laus zis thiab tawg ntawm kev sib nphoo ntawm tus kheej. Los ntawm kev tshawb fawb txog kev tshawb fawb thiab tsim nyog cov qauv tsim, RDP tuaj yeem txhim kho cov kev ua tau zoo ntawm tus kheej colled lev kom tau raws li cov haujlwm sib txawv.
Lub sijhawm Post: Feb-15-2025