Qhuav mix mortar yog dav siv nyob rau hauv kev tsim kho tej yaam num vim nws yooj yim thiab npaum applicability. Nws muaj kev sib xyaw ua ke ntawm cov cement, xuab zeb, thiab lwm yam khoom siv ntxiv, xws li cellulose ether, uas ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ua tau zoo ntawm cov mortar. Tshwj xeeb, cellulose ether, tseem hu ua Hydroxypropyl Methyl Cellulose (HPMC), yog ua haujlwm los txhim kho cov dej tuav lub peev xwm ntawm cov khoom sib xyaw qhuav, yog li txhim kho nws qhov sib xws thiab kev ua haujlwm.
Dej yog qhov tseem ceeb hauv cov txheej txheem hydration ntawm cov cement, qhov twg nws hnov mob nrog cov cement hais los ua ib qho kev sib cog lus ruaj khov uas thaum kawg ua rau cov mortar. Txawm li cas los xij, cov dej evaporation ntau dhau thaum lub sijhawm ziab lossis teeb tsa tuaj yeem ua rau muaj teeb meem xws li tawg, shrinkage, thiab txo lub zog. Qhov no yog qhov uas cellulose ether los ua si. Los ntawm kev sib koom ua ke ntawm cellulose ether rau hauv cov khoom sib xyaw qhuav, cov dej khaws cia muaj peev xwm txhim kho tau zoo, txo cov kev cuam tshuam tsis zoo ntawm cov dej evaporation sai.
Nyob rau hauv qhuav sib tov mortar, cellulose ether ua raws li ib tug dej tuav tus neeg sawv cev, uas tso cai rau ntev hydration ntawm cement hais. Cov txheej txheem hydration txuas ntxiv no ua kom cov mortar muaj sijhawm txaus los tsim kom muaj lub zog zoo thiab ua haujlwm ntev. Cov cellulose ether molecules tsim ib txheej tiv thaiv nyob ib ncig ntawm cov cement hais, txo cov dej evaporation tus nqi thiab ua kom muaj dej txaus rau hydration. Yog li ntawd, cov tshuaj khib nyiab tau zoo dua qub, ua kom yooj yim rau kev sib kis, pwm, thiab cov duab thaum siv.
Tsis tas li ntawd, cellulose ether txhim khu kev ua haujlwm ntawm cov khoom sib xyaw qhuav. Nws ua raws li cov roj nplua nyeem, txo cov kev sib txhuam ntawm cov khoom siv tshuaj khib thiab ua kom cov ntawv thov smoother. Qhov kev txhim kho kev ua haujlwm no tsis yog tsuas yog ua kom muaj txiaj ntsig zoo xwb tab sis kuj tseem txhim kho qhov zoo ntawm kev tsim kho tiav. Kev siv cov cellulose ether nyob rau hauv qhuav sib xyaw mortar kuj txo qhov kev pheej hmoo ntawm kev sib cais, qhov twg cov khoom siv sib cais thaum thauj los yog siv. Qhov no ua kom muaj qhov sib xyaw ua ke thiab ua haujlwm zoo ib yam ntawm cov tshuaj khib.
Tsis tas li ntawd, cellulose ether dej tuav tau pab tswj cov txheej txheem kho ntawm cov tshuaj khib. Kev kho kom zoo yog qhov tseem ceeb kom ua tiav qhov xav tau kawg lub zog thiab kav ntev ntawm cov khoom siv. Lub sijhawm ntev hydration muab los ntawm cellulose ether kom ntseeg tau tias cov tshuaj mortar kho tusyees thiab huv si, tshem tawm cov pob txha tsis muaj zog thiab txhim kho kev ua haujlwm ntev.
Nws yog ib nqi sau cia hais tias lub luag hauj lwm ntawm cellulose ether nyob rau hauv qhuav mix mortar tsis yog tas rau dej tuav ib leeg. Qhov no ntau yam additive muaj lwm yam zoo, xws li txhim kho adhesion, txo kev tawg, thiab muaj zog tiv taus huab cua thiab tshuaj. Yog li ntawd, nws yog suav hais tias yog ib qho tseem ceeb nyob rau hauv lub formulation ntawm high-zoo qhuav mix mortars.
Hauv kev xaus, cellulose ether dej khaws cia ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm cov tshuaj khib nyiab qhuav. Nws txhim kho cov dej txaus rau cov cement hydration, txhim kho cov tshuaj khib nyiab sib xws, ua haujlwm tau zoo, thiab tag nrho cov khoom siv tsim kho kom zoo. Kev koom ua ke ntawm cellulose ether ua kom lub sijhawm ntev dej, txo cov dej evaporation, thiab pab tswj cov txheej txheem kho. Raws li qhov tshwm sim, qhuav sib xyaw mortar nrog cellulose ether muaj kev ua tau zoo, ua haujlwm ntev, thiab kev ua haujlwm zoo hauv kev tsim kho.
Post lub sij hawm: Nov-29-2023