Self-leveling mortar tuaj yeem tso siab rau nws tus kheej qhov hnyav los tsim lub hauv paus tiaj tus, du thiab muaj zog ntawm lub substrate rau nteg lossis khi lwm cov ntaub ntawv, thiab tib lub sijhawm nws tuaj yeem nqa tawm qhov loj thiab siv tau zoo. Yog li ntawd, high fluidity yog ib qho tseem ceeb heev ntawm tus kheej-leveling mortar. Tsis tas li ntawd, nws yuav tsum muaj qee yam dej tuav thiab kev sib txuas ntawm lub zog, tsis muaj dej sib cais, thiab muaj cov yam ntxwv ntawm kev rwb thaiv tsev kub thiab kub tsis tshua muaj siab.
Feem ntau, tus kheej-leveling mortar yuav tsum muaj fluidity zoo, tab sis qhov fluidity ntawm cov cement paste feem ntau tsuas yog 10-300px; cellulose ether yog ib qho tseem ceeb ntawm cov khoom sib xyaw ua ke, txawm hais tias qhov sib ntxiv yog tsawg heev, nws tuaj yeem txhim kho Mortar kev ua tau zoo, nws tuaj yeem txhim kho qhov sib xws, kev ua haujlwm, kev sib koom ua ke thiab kev tuav dej ntawm cov mortar. Nws plays lub luag hauj lwm tseem ceeb heev nyob rau hauv lub teb ntawm npaj-mixed mortar.
1. Fluidity: Cellulose ether muaj ib qho tseem ceeb ntawm kev tuav dej, sib xws thiab kev tsim kho ntawm tus kheej-leveling mortar. Tshwj xeeb tshaj yog raws li tus kheej-leveling mortar, fluidity yog ib qho ntawm cov cim tseem ceeb rau kev ntsuas tus kheej-leveling kev ua tau zoo. Nyob rau hauv qhov kev pom zoo ntawm kev ua kom ntseeg tau qhov qub muaj pes tsawg leeg ntawm mortar, lub fluidity ntawm mortar tuaj yeem hloov kho los ntawm kev hloov cov cellulose ether. Txawm li cas los xij, yog tias tus nqi siab dhau lawm, qhov fluidity ntawm mortar yuav raug txo, yog li tus nqi ntawm cellulose ether HPMC yuav tsum tau tswj nyob rau hauv qhov tsim nyog.
2. Kev tuav dej: Cov dej tuav ntawm mortar yog ib qho tseem ceeb rau kev ntsuas qhov ruaj khov ntawm cov khoom siv sab hauv ntawm cov cement mortar tshiab. Txhawm rau kom ua tiav cov dej ntws tawm ntawm cov khoom siv gel, tus nqi tsim nyog ntawm cellulose ether tuaj yeem tswj cov dej noo hauv mortar rau lub sijhawm ntev. Feem ntau hais lus, cov dej tuav tus nqi ntawm slurry nce nrog qhov nce ntawm cellulose ether cov ntsiab lus. Cov dej tuav cov nyhuv ntawm cellulose ether HPMC tuaj yeem tiv thaiv lub substrate los ntawm absorbing dej ntau dhau sai heev, thiab cuam tshuam cov evaporation ntawm cov dej, thiaj li xyuas kom meej tias cov slurry ib puag ncig muab dej txaus rau cement hydration. Tsis tas li ntawd, viscosity ntawm cellulose ether kuj muaj txiaj ntsig zoo rau cov dej khaws cia ntawm mortar. Qhov siab dua qhov viscosity, qhov dej tuav tau zoo dua. Feem ntau, cellulose ether HPMC nrog viscosity ntawm 400mpa.s feem ntau yog siv rau hauv tus kheej-leveling mortar, uas tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov mortar thiab ua rau kom cov mortar compactness.
3. Teem sijhawm sijhawm: Cellulose ether muaj qee yam cuam tshuam rau cov tshuaj khib nyiab. Nrog rau qhov nce ntawm cov ntsiab lus ntawm cellulose ether, lub sij hawm teem sij hawm ntawm mortar prolongs. Cov nyhuv retarding ntawm cellulose ether HPMC ntawm cov cement paste feem ntau yog nyob ntawm qhov kev hloov pauv ntawm pawg alkyl, thiab muaj kev sib raug zoo nrog nws qhov hnyav molecular. Qhov me me ntawm qhov kev hloov pauv ntawm alkyl, qhov loj dua cov ntsiab lus hydroxyl, thiab qhov pom tseeb dua cov nyhuv retarding. Thiab qhov siab dua cov ntsiab lus ntawm cellulose ether, qhov pom tseeb dua qhov cuam tshuam ntawm cov zaj duab xis complex ntawm cov dej thaum ntxov ntawm cov cement, yog li cov nyhuv retarding kuj pom tseeb dua.
4. Flexural zog thiab compressive zog: Feem ntau, lub zog yog ib qho ntawm cov kev ntsuam xyuas tseem ceeb rau kev kho cov nyhuv ntawm cov cement-based cementitious cov ntaub ntawv ntawm cov khoom sib tov. Lub zog compressive thiab flexural zog ntawm mortar yuav txo nrog qhov nce ntawm cellulose ether HPMC cov ntsiab lus.
5. Bonding zog: cellulose ether HPMC muaj kev cuam tshuam zoo rau kev sib koom ua ke ntawm mortar. Cellulose ether tsim ib zaj duab xis polymer nrog cov nyhuv sealing ntawm cov cement hydration hais nyob rau hauv cov kua theem system, uas txhawb nqa dej ntau nyob rau hauv lub polymer zaj duab xis sab nraum cov cement hais, uas yog conducive mus rau lub tiav hydration ntawm cov cement, yog li txhim kho daim ntawv cog lus. lub zog ntawm paste tom qab hardening. Nyob rau tib lub sijhawm, tus nqi tsim nyog ntawm cellulose ether txhim kho cov yas thiab yooj yim ntawm cov tshuaj khib nyiab, txo qhov rigidity ntawm txoj kev hloov chaw ntawm cov mortar thiab substrate interface, thiab txo cov zawv zawg muaj peev xwm ntawm cov interfaces. Rau qee qhov, qhov kev sib txuas ntawm cov tshuaj khib thiab cov substrate tau txhim kho. Tsis tas li ntawd, vim muaj cov cellulose ether nyob rau hauv cov cement paste, ib qho kev hloov pauv tshwj xeeb hauv cheeb tsam thiab cov txheej txheem cuam tshuam tau tsim los ntawm cov khoom khib nyiab thiab cov khoom siv dej. Cov txheej txheem txheej txheej no ua rau thaj chaw hloov pauv hloov pauv tau yooj yim dua thiab tsis tshua muaj zog, yog li , kom cov mortar muaj lub zog ruaj khov.
Post lub sij hawm: Feb-27-2023