Self-leveling mortar tuaj yeem tso siab rau nws tus kheej qhov hnyav los tsim lub tiaj tus, du thiab muaj zog lub hauv paus ntawm lub substrate rau nteg lossis khi lwm yam ntaub ntawv. Nyob rau tib lub sijhawm, nws tuaj yeem nqa cov khoom loj thiab siv tau zoo. Yog li ntawd, lub siab 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 dej zoo, tab sis qhov fluidity ntawm cov cement paste feem ntau tsuas yog 10-12cm; ntawmcellulose ethers, hydroxypropyl methylcellulose (HPMC) 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 qhov kev ua tau zoo ntawm cov mortar, 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. Mobility
Hydroxypropyl methylcellulose (HPMC)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 ib txwm muaj ntawm cov mortar, fluidity ntawm mortar tuaj yeem hloov kho los ntawm kev hloov pauv tus nqi ntawm HPMC. Txawm li cas los xij, yog tias qhov ntau npaum li cas siab dhau lawm, qhov fluidity ntawm mortar yuav raug txo, yog li qhov ntau npaum li cas ntawm HPMC yuav tsum tau tswj nyob rau hauv ntau yam tsim nyog.
2. Kev tuav dej
Cov dej tuav ntawm mortar yog qhov ntsuas tseem ceeb los 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 HPMC 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 nce ntawm HPMC cov ntsiab lus. Kev tuav dej ntawm 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, cov viscosity ntawm hydroxypropyl methylcellulose kuj muaj kev cuam tshuam zoo rau cov dej tuav ntawm mortar. Qhov siab dua qhov viscosity, qhov dej tuav tau zoo dua. Feem ntau, cov khoom uas muaj viscosity ntawm li 400mpa.s feem ntau yog siv rau 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
HPMC muaj qee yam cuam tshuam rau ntawm mortar. Nrog rau qhov nce ntawm qhov ntau npaum li cas, lub sijhawm teeb tsa ntawm lub mortar yog ncua ntev. Cov nyhuv retarding ntawm HPMC ntawm cov cement paste feem ntau yog nyob ntawm qhov kev hloov pauv ntawm pawg alkyl, thiab tsis 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 ntawm HPMC cov ntsiab lus, qhov pom tseeb dua cov nyhuv ntawm cov txheej txheem zaj duab xis 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 ntsuas tseem ceeb rau kev kho cov nyhuv ntawm cov cement-based cementitious cov ntaub ntawv ntawm qhov sib tov. Lub zog compressive thiab flexural zog ntawm mortar yuav txo nrog qhov nce ntawm HPMC cov ntsiab lus.
5. Bond zog
HPMC muaj kev cuam tshuam zoo rau kev sib koom ua ke ntawm mortar.HPMCtsim ib zaj duab xis polymer nrog cov nyhuv sealing ntawm cov kua theem system thiab cov cement hydration hais, uas txhawb dej ntau hauv cov yeeb yaj kiab polymer sab nraum cov cement hais, uas yog qhov tsim nyog rau kev ua tiav cov dej ntawm cov cement, yog li txhim kho cov slurry zoo. Hardened bond zog. Nyob rau tib lub sijhawm, ntxiv qhov tsim nyog ntawm HPMC txhim kho cov yas thiab yooj yim ntawm cov tshuaj khib nyiab, txo qhov kev sib tw ntawm kev hloov chaw ntawm cov mortar thiab substrate interface, thiab txo cov zawv zawg muaj peev xwm ntawm kev sib tshuam. Rau qee qhov, qhov kev sib txuas ntawm cov tshuaj khib thiab cov substrate tau txhim kho. Tsis tas li ntawd, vim muaj HPMC nyob rau hauv cov cement paste, ib qho tshwj xeeb kev hloov pauv cheeb tsam thiab txheej txheej txheej tau tsim los ntawm cov khoom khib nyiab thiab cov khoom siv dej. Cov txheej txheem interface no ua rau thaj chaw hloov pauv hloov pauv tau yooj yim dua thiab tsis nruj. Yog li ntawd, mortar muaj kev sib raug zoo zog.
Lub sij hawm xa tuaj: Plaub Hlis-25-2024