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 ntawm cov tshuaj ntxiv. Ntxiv ib hom tshuaj ntxiv rau cov tshuaj khib qhuav hu ua kev hloov kho thawj zaug, ntxiv ob lossis ntau yam tshuaj ntxiv yog kev hloov kho thib ob. Qhov zoo ntawm cov tshuaj khib qhuav nyob ntawm kev xaiv cov khoom kom raug thiab kev sib koom tes thiab kev sib phim ntawm ntau yam khoom. Cov tshuaj ntxiv kim heev thiab muaj kev cuam tshuam loj rau cov khoom ntawm cov tshuaj khib qhuav. Yog li ntawd, thaum xaiv cov tshuaj ntxiv, qhov ntau ntawm cov tshuaj ntxiv yuav tsum yog thawj qhov chaw. Cov hauv qab no yog kev qhia luv luv txog kev xaiv cov tshuaj ntxiv cellulose ether.
Cellulose ether tseem hu ua rheological modifier ib hom admixture siv los kho cov rheological zog ntawm cov mortar sib xyaw tshiab, yuav luag siv rau txhua hom mortar. Cov yam ntxwv hauv qab no yuav tsum tau coj mus rau hauv tus account thaum xaiv ntau yam thiab qhov ntau ntxiv:
(1) Kev khaws dej ntawm qhov kub sib txawv;
(2) 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 thixotropy thiab qhov muaj peev xwm ntawm cov mortar (uas yog qhov tsim nyog rau cov mortar coated rau ntawm qhov chaw ntsug);
(6) Tus nqi yaj, qhov xwm txheej thiab kev yaj tiav.
Ntxiv rau kev ntxiv cellulose ether rau hauv cov mortar qhuav (xws li methyl cellulose ether), kuj tseem tuaj yeem ntxiv vinyl polyvinyl acid ester, uas yog, kev hloov kho thib ob. Cov inorganic binder hauv mortar (cement, gypsum) tuaj yeem lav qhov muaj zog compressive siab, tab sis muaj me ntsis cuam tshuam rau lub zog tensile thiab lub zog khoov. Vinyl polyvinyl ester tsim cov zaj duab xis elastic hauv cov pob zeb cement, ua rau mortar tuaj yeem dais qhov hnyav deformation siab, txhim kho kev hnav tsis kam. Nws tau raug pov thawj los ntawm kev xyaum tias los ntawm kev ntxiv ntau yam ntawm methyl cellulose ether thiab vinyl polyvinyl ester rau hauv cov mortar qhuav, txheej txheej nyias nyias phaj bonding mortar, plastering mortar, decorative plastering mortar, aerated concrete block masonry mortar thiab self-leveling mortar ntawm pouring pem teb tuaj yeem npaj tau. Kev sib tov ob qho tsis tsuas yog tuaj yeem txhim kho qhov zoo ntawm mortar, tab sis kuj txhim kho qhov kev tsim kho zoo heev.
Hauv kev siv tiag tiag, txhawm rau txhim kho kev ua tau zoo, nws yog qhov tsim nyog siv ntau yam khoom sib xyaw. Qhov sib phim zoo tshaj plaws ntawm qhov sib piv ntawm cov khoom ntxiv, qhov ntau thiab tsawg, qhov sib piv, tuaj yeem muaj qee qhov cuam tshuam los txhim kho kev ua tau zoo ntawm cov mortar, tab sis nws cov teebmeem hloov pauv ntawm cov mortar thaum siv ib leeg yog txwv, qee zaum txawm tias muaj qhov tsis zoo, xws li cov fiber doped ib leeg, ua rau cov mortar lo rau ntau dua, txo qib ntawm stratification tib lub sijhawm. Txawm li cas los xij, kev siv dej ntawm cov mortar tau nce ntxiv thiab khaws cia rau hauv cov slurry, uas ua rau lub zog compressive txo qis. Thaum ntxiv cov neeg sawv cev rau huab cua, qib delamination ntawm mortar thiab kev siv dej tuaj yeem txo qis heev, tab sis lub zog compressive ntawm mortar yuav txo qis vim muaj ntau npuas. Txhim kho cov tshuaj masonry rau qhov ua tau zoo tshaj plaws, thaum tsis txhob ua rau puas tsuaj rau lwm yam khoom, lub zog ntawm cov tshuaj masonry sib xws, qib ntawm stratification thiab ua tau raws li qhov yuav tsum tau ua engineering thiab cov cai ntawm cov lus qhia tshwj xeeb, tib lub sijhawm, tsis txhob siv cov kua qaub putty, txuag cov cement, kev tiv thaiv ib puag ncig, thiab lwm yam, los ntawm kev txo dej, viscosity, dej thickening thiab cua-entraining plasticizing pom, Nws yog qhov tsim nyog los ua cov kev ntsuas kom dav los tsim thiab siv cov tshuaj sib xyaw.
Lub sijhawm tshaj tawm: Plaub Hlis-29-2022