Cov tshuaj nplaum uas nws tus kheej siv tau nws qhov hnyav los ua lub hauv paus tiaj tus, du thiab muaj zog rau ntawm cov khoom siv rau kev tso lossis sib txuas lwm yam khoom, thiab tib lub sijhawm nws tuaj yeem ua tiav kev tsim kho loj thiab ua haujlwm tau zoo. Yog li ntawd, qhov dej ntws zoo yog ib qho tseem ceeb heev ntawm cov tshuaj nplaum uas nws tus kheej siv. Tsis tas li ntawd, nws yuav tsum muaj qee qhov kev tuav dej thiab lub zog sib txuas, tsis muaj qhov tshwm sim ntawm kev sib cais dej, thiab muaj cov yam ntxwv ntawm kev rwb thaiv tsev kub thiab qhov kub qis.
Feem ntau, cov tshuaj mortar uas nws tus kheej leveling xav tau qhov fluidity zoo, tab sis qhov fluidity ntawm cov cement paste feem ntau tsuas yog 10-12cm xwb; cellulose ether yog ib qho khoom ntxiv tseem ceeb ntawm cov tshuaj mortar uas twb sib xyaw lawm, txawm hais tias qhov ntxiv tsawg heev, nws tuaj yeem txhim kho qhov kev ua tau zoo ntawm Mortar, nws tuaj yeem txhim kho qhov sib xws, kev ua haujlwm, kev sib txuas thiab kev ua haujlwm ntawm cov tshuaj mortar.
1: Kev ua kua ntawm cov tshuaj khib
Cellulose ether muaj feem cuam tshuam tseem ceeb rau kev khaws dej, kev sib xws thiab kev ua haujlwm ntawm cov tshuaj mortar uas nws tus kheej ua. Tshwj xeeb tshaj yog raws li cov tshuaj mortar uas nws tus kheej ua, kev ntws yog ib qho ntawm cov cim tseem ceeb rau kev ntsuam xyuas kev ua haujlwm ntawm nws tus kheej ua. Raws li lub hauv paus ntawm kev ua kom muaj cov khoom sib xyaw zoo li qub, kev ntws ntawm cov tshuaj mortar tuaj yeem hloov kho los ntawm kev hloov pauv qhov ntau ntawm cellulose ether. Txawm li cas los xij, yog tias qhov koob tshuaj ntau dhau, qhov kev ntws ntawm cov tshuaj mortar yuav raug txo qis, yog li qhov koob tshuaj ntawm cellulose ether yuav tsum tau tswj hwm hauv qhov ntau thiab tsawg tsim nyog.
2: Kev khaws dej ntawm cov av nplaum
Qhov kev khaws dej ntawm cov mortar yog ib qho tseem ceeb uas ntsuas qhov ruaj khov ntawm cov khoom sab hauv ntawm cov cement mortar tshiab. Yuav kom ua tiav qhov kev ua kom cov dej ntawm cov khoom gel, ib qho cellulose ether tsim nyog tuaj yeem tswj cov dej noo hauv cov mortar ntev. Feem ntau hais lus, qhov ceev ntawm cov slurry khaws dej nce ntxiv nrog rau qhov nce ntawm cov cellulose ether cov ntsiab lus. Qhov cuam tshuam ntawm kev khaws dej ntawm cellulose ether tuaj yeem tiv thaiv cov substrate los ntawm kev nqus dej ntau dhau sai dhau, thiab cuam tshuam kev ua kom dej evaporation, yog li xyuas kom meej tias qhov chaw slurry muab dej txaus rau cement hydration. Tsis tas li ntawd, qhov viscosity ntawm cellulose ether kuj muaj kev cuam tshuam loj rau qhov kev khaws dej ntawm mortar. Qhov siab dua qhov viscosity, qhov zoo dua qhov kev khaws dej. Feem ntau, cellulose ether nrog viscosity ntawm 400mpa.s feem ntau yog siv rau hauv cov mortar tus kheej, uas tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov mortar thiab ua kom cov mortar compactness.
3: Lub sijhawm teeb tsa mortar
Cellulose ether muaj qee yam kev cuam tshuam rau cov mortar. Nrog rau kev nce ntxiv ntawm cov ntsiab lus ntawm cellulose ether, lub sijhawm teeb tsa ntawm cov mortar ntev dua. Qhov cuam tshuam ntawm cellulose ether ntawm cov cement paste feem ntau nyob ntawm qib ntawm kev hloov pauv ntawm pawg alkyl, thiab tsis muaj feem cuam tshuam nrog nws qhov hnyav molecular. Qhov me dua qib ntawm kev hloov pauv alkyl, qhov loj dua cov ntsiab lus hydroxyl, thiab qhov pom tseeb ntau dua qhov cuam tshuam qeeb. Thiab qhov siab dua cov ntsiab lus ntawm cellulose ether, qhov pom tseeb ntau dua qhov cuam tshuam qeeb ntawm cov txheej zaj duab xis ntawm kev sib xyaw ua ke ntawm cov dej noo thaum ntxov ntawm cement, yog li qhov cuam tshuam qeeb kuj pom tseeb ntau dua.
4: Lub zog compressive ntawm mortar thiab lub zog flexural
Feem ntau, lub zog yog ib qho ntawm cov ntsuas tseem ceeb rau kev kho cov nyhuv ntawm cov cement-based cementitious ntawm cov sib tov. Thaum cov ntsiab lus ntawm cellulose ether nce, lub zog compressive thiab lub zog flexural ntawm mortar yuav txo qis.
5: Lub zog sib txuas ntawm cov mortar
Cellulose ether muaj feem cuam tshuam loj heev rau kev ua haujlwm ntawm cov mortar. Cellulose ether tsim cov zaj duab xis polymer nrog cov nyhuv sealing ntawm cov cement hydration particles hauv cov kua theem system, uas txhawb kom muaj dej ntau dua hauv cov zaj duab xis polymer sab nraum cov cement particles, uas yog qhov zoo rau kev ua kom tiav ntawm cov cement hydration, yog li txhim kho lub zog ntawm cov nplaum tom qab hardening. Tib lub sijhawm, ib qho nyiaj tsim nyog ntawm cellulose ether txhim kho qhov plasticity thiab kev ywj pheej ntawm cov mortar, txo qhov rigidity ntawm thaj chaw hloov pauv ntawm cov mortar thiab lub substrate interface, thiab txo qhov muaj peev xwm swb ntawm cov interfaces. Mus rau qee qhov, qhov kev sib txuas ntawm cov mortar thiab lub substrate yog txhim kho. Tsis tas li ntawd, vim muaj cellulose ether hauv cov cement paste, ib qho tshwj xeeb interface hloov pauv cheeb tsam thiab interface txheej yog tsim ntawm cov mortar particles thiab cov khoom hydration. Cov interface txheej no ua rau interface hloov pauv cheeb tsam ntau dua thiab tsawg dua rigid, yog li ntawd cov mortar muaj lub zog sib txuas zoo.
Lub sijhawm tshaj tawm: Lub Ob Hlis-03-2023