Ib qho ntawm qhov sib txawv loj tshaj plaws ntawm cov tshuaj khib qhuav thiab cov tshuaj khib ib txwm muaj yog tias cov tshuaj khib qhuav raug hloov kho nrog me ntsis cov tshuaj ntxiv. Ntxiv ib qho ntxiv rau cov tshuaj khib hmoov qhuav hu ua kev hloov kho thawj zaug, ntxiv ob lossis ntau cov tshuaj ntxiv hu ua kev hloov kho thib ob. Qhov zoo ntawm cov tshuaj khib hmoov qhuav nyob ntawm kev xaiv cov khoom kom raug thiab kev sib koom tes thiab kev sib phim ntawm ntau yam khoom. Vim tias cov tshuaj ntxiv kim dua, thiab muaj kev cuam tshuam ntau dua rau kev ua haujlwm ntawm cov tshuaj khib hmoov qhuav. Yog li ntawd, thaum xaiv cov tshuaj ntxiv, qhov ntau ntawm cov tshuaj ntxiv yuav tsum tau muab qhov tseem ceeb tshaj plaws. Cov hauv qab no yog kev qhia luv luv txog txoj kev xaiv cov tshuaj ntxiv cellulose ether.
Cellulose ether tseem hu ua rheology modifier, ib qho admixture siv los kho cov rheological zog ntawm cov mortar sib xyaw tshiab, thiab siv rau hauv yuav luag txhua hom mortar. Cov yam ntxwv hauv qab no yuav tsum tau xav txog thaum xaiv nws ntau yam thiab dosage:
(1) Kev khaws dej ntawm qhov kub sib txawv;
(2) Cov nyhuv tuab, viscosity;
(3) Kev sib raug zoo ntawm qhov sib xws thiab qhov kub, thiab qhov cuam tshuam rau qhov sib xws thaum muaj electrolyte;
(4) Daim ntawv thiab qib ntawm etherification;
(5) Kev txhim kho ntawm cov mortar thixotropy thiab qhov muaj peev xwm tso (qhov no yog qhov tsim nyog rau cov mortar pleev xim rau ntawm cov chaw ntsug);
(6) Qhov ceev ntawm kev yaj, tej yam kev mob thiab kev ua tiav ntawm kev yaj.
Ntxiv rau kev ntxiv cellulose ether (xws li methyl cellulose ether) rau hauv cov hmoov qhuav mortar, polyvinyl acid vinyl ester kuj tseem tuaj yeem ntxiv, uas yog, kev hloov kho thib ob. Cov inorganic binders (cement, gypsum) hauv mortar tuaj yeem ua kom muaj zog compressive siab, tab sis muaj me ntsis cuam tshuam rau lub zog tensile thiab lub zog flexural. Polyvinyl acetate tsim ib zaj duab xis elastic hauv cov qhov ntawm cov pob zeb cement, ua rau cov mortar tuaj yeem tiv taus cov khoom deformation siab thiab txhim kho kev hnav tsis kam. Kev xyaum tau ua pov thawj tias kev ntxiv ntau yam ntawm methyl cellulose ether thiab polyvinyl acid vinyl ester rau hauv cov hmoov qhuav mortar tuaj yeem npaj cov phaj sib txuas mortar nyias txheej, plastering mortar, decorative painting mortar, thiab masonry mortar rau aerated concrete blocks Thiab self-leveling mortar rau pouring pem teb, thiab lwm yam. Kev sib tov ob qho tsis tsuas yog tuaj yeem txhim kho qhov zoo ntawm cov mortar, tab sis kuj txhim kho kev tsim kho zoo heev.
Hauv kev siv tiag tiag, txhawm rau txhim kho kev ua tau zoo tag nrho, nws yog qhov tsim nyog siv ntau yam khoom ntxiv ua ke. Muaj qhov sib piv zoo tshaj plaws ntawm cov khoom ntxiv. Tsuav yog qhov ntau thiab tsawg thiab qhov sib piv tsim nyog, lawv tuaj yeem txhim kho kev ua tau zoo ntawm cov mortar los ntawm ntau yam. Txawm li cas los xij, thaum siv ib leeg, qhov kev hloov pauv ntawm cov mortar yog txwv, thiab qee zaum txawm tias cov teebmeem tsis zoo, xws li ntxiv cellulose ib leeg, thaum ua kom cov mortar sib koom ua ke thiab txo qhov degree ntawm delamination, ua rau cov mortar siv dej ntau ntxiv thiab khaws cia rau hauv cov slurry, uas ua rau lub zog compressive txo qis; Thaum sib xyaw nrog cov neeg sawv cev cua-entraining, txawm hais tias qib ntawm stratification ntawm cov mortar tuaj yeem txo qis heev, thiab kev siv dej kuj txo qis heev, tab sis lub zog compressive ntawm cov mortar yuav txo qis vim muaj ntau cov pa npuas. Txhawm rau txhim kho kev ua tau zoo ntawm cov mortar masonry kom zoo tshaj plaws, thiab tib lub sijhawm zam kev puas tsuaj rau lwm yam khoom ntawm cov mortar, qhov sib xws, txheej thiab lub zog ntawm cov mortar masonry yuav tsum ua tau raws li qhov yuav tsum tau ua ntawm qhov project thiab cov lus qhia txog kev siv tshuab. Tib lub sijhawm, tsis muaj cov kua qaub ntsuab siv, txuag rau cov cement, kev tiv thaiv ib puag ncig, thiab lwm yam, nws yog qhov tsim nyog los ua cov kev ntsuas dav dav, tsim thiab siv cov khoom sib xyaw ua ke los ntawm kev pom ntawm kev txo dej, nce viscosity, khaws dej thiab thickening, thiab cua-entraining plasticization.
Lub sijhawm tshaj tawm: Tsib Hlis-08-2023