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Dab tsi yog cov kev xaiv ntawm qhuav mix mortar additive cellulose?

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Ib qho ntawm qhov sib txawv loj tshaj plaws ntawm cov khoom sib xyaw qhuav thiab cov tshuaj khib nyiab ib txwm yog kev hloov kho ntawm cov khoom sib xyaw qhuav nrog ib qho me me ntawm cov tshuaj ntxiv.Ntxiv ib qho ntxiv rau cov khib nyiab qhuav yog hu ua kev hloov kho thawj zaug, thiab ntxiv ob lossis ntau qhov ntxiv yog qhov hloov kho thib ob.Qhov zoo ntawm cov hmoov qhuav mortar yog nyob ntawm qhov raug xaiv ntawm cov khoom xyaw thiab kev sib koom tes ntawm ntau yam khoom xyaw.Vim tias cov tshuaj additives kim dua thiab muaj kev cuam tshuam ntau dua rau kev ua haujlwm ntawm cov tshuaj khib nyiab qhuav.Yog li ntawd, thaum xaiv additives, tus nqi ntawm additives yuav tsum tau muab qhov tseem ceeb tshaj plaws.Hauv qab no yog cov lus qhia luv luv rau kev xaiv cov tshuaj ntxiv cellulose ether.

 

Dab tsi yog cov kev xaiv ntawm qhuav mix mortar additive cellulose?

 

Cellulose ether, tseem hu ua rheology modifier, yog ib qho khoom siv los kho cov khoom rheological ntawm cov tshuaj khib nyiab tshiab thiab siv yuav luag txhua hom mortar.Cov khoom hauv qab no yuav tsum tau txiav txim siab thaum xaiv nws ntau thiab ntxiv tus nqi:
(1) Kev tuav dej ntawm qhov kub sib txawv;
(2) Thickening nyhuv, viscosity;
(3) Kev sib raug zoo ntawm qhov sib xws thiab qhov kub thiab txias, thiab kev cuam tshuam ntawm kev sib xws ntawm cov electrolyte;
(4) Daim ntawv thiab qib ntawm etherification;
(5) Kev txhim kho ntawm thixotropy thiab qhov chaw muaj peev xwm ntawm mortar (qhov no yog qhov tsim nyog rau mortar pleev xim rau ntawm qhov chaw ntsug);
(6) Dissolution tus nqi, tej yam kev mob thiab tiav ntawm dissolution.
Ntxiv nrog rau kev ntxiv cellulose ether (xws li methyl cellulose ether) rau cov hmoov qhuav mortar, polyvinyl acetate kuj tuaj yeem ntxiv, uas yog, hloov kho theem nrab.Inorganic binders (cement, gypsum) nyob rau hauv mortar tuaj yeem ua kom muaj zog compressive, tab sis tsis tshua muaj zog tensile thiab flexural zog.Polyvinyl acetate tsim ib zaj duab xis elastic nyob rau hauv cov cement pob zeb pores, kom cov mortar muaj peev xwm tiv taus siab deformation loads thiab txhim kho hnav tsis kam.Kev xyaum tau ua pov thawj tias qhov sib txawv ntawm methyl cellulose ether thiab polyvinyl acetate rau hauv mortar qhuav tuaj yeem npaj cov txheej nyias nyias smeared slab bonding mortar, plastering mortar, hniav plastering mortar, thiab masonry mortar rau huab cua-entrained qhob blocks thiab self-leveling mortar rau pouring. hauv pem teb, thiab lwm yam. Kev sib xyaw ntawm ob tuaj yeem tsis tsuas yog txhim kho qhov zoo ntawm mortar, tab sis kuj zoo heev txhim kho kev tsim kho efficiency.
Hauv kev siv tswv yim, txhawm rau txhim kho qhov kev ua tau zoo, yuav tsum muaj ntau yam khoom sib xyaw.Muaj qhov pom kev sib piv ntawm cov additives.Ntev npaum li qhov ntau npaum li cas thiab qhov sib piv yog qhov tsim nyog, lawv tuaj yeem txhim kho kev ua haujlwm ntawm cov tshuaj khib los ntawm ntau sab.Txawm li cas los xij, thaum lawv siv ib leeg, qhov kev hloov pauv ntawm cov tshuaj khib nyiab yog txwv, thiab qee zaum txawm tias cov teebmeem tsis zoo, xws li kev sib xyaw ntawm cov cellulose, ua rau kom muaj kev sib koom ua ke ntawm mortar thiab txo cov degree ntawm delamination, tab sis tib lub sij hawm, qhov sib xyaw ntawm cov tshuaj khib nyiab tuaj yeem ua rau muaj kev cuam tshuam loj heev. Kev siv dej ntawm cov tshuaj khib nyiab tau nce siab heev thiab cov mortar yog khaws cia rau hauv cov slurry sab hauv, uas ua rau muaj kev txo qis hauv compressive zog;Thaum tus neeg saib xyuas huab cua tau ntxiv, txawm hais tias qhov stratification ntawm lub mortar tuaj yeem txo qis heev thiab kev siv dej kuj tuaj yeem txo qis, lub zog compressive ntawm cov tshuaj khib yuav txo qis vim muaj cua npuas ntau.Txhawm rau kom ua tiav qhov kev ua tau zoo ntawm cov cement mortar thiab tsis txhob raug mob rau lwm yam khoom ntawm lub mortar, qhov sib xws, txheej thiab lub zog ntawm cov masonry mortar tuaj yeem ua tau raws li cov kev cai engineering thiab cov kev qhia tshwj xeeb.Nws yog ib qho tsim nyog yuav tsum tau ua kom tiav kev ntsuas, txhim kho thiab siv cov khoom sib xyaw ua ke los ntawm cov kev xav ntawm kev txo dej, kev txhim kho viscosity, dej tuav thiab thickening, thiab huab cua-entraining plasticization rau cement thiab kev tiv thaiv ib puag ncig.

 


Lub sij hawm xa tuaj: Mar-31-2022
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