Hydroxypropyl methyl cellulose nyob rau hauv qhuav mortar, cellulose ether ntxiv yog tsawg heev, tab sis tuaj yeem txhim kho kev ua haujlwm ntawm cov khib nyiab ntub dej, mortar kev ua tau zoo yog ib qho ntawm cov khoom siv tseem ceeb. Tam sim no, hydroxypropyl methyl cellulose siv nyob rau hauv qhuav mortar cellulose ether yog tsuas yog hydroxypropyl methyl cellulose ether (HPMC). Hydroxypropyl methyl cellulose nyob rau hauv qhuav mortar HPMC feem ntau plays lub luag hauj lwm nyob rau hauv dej tuav, thickening, txhim kho kev ua tau zoo ntawm kev tsim kho. Hydroxypropyl methylcellulose HPMC tsis koom nrog cov tshuaj tiv thaiv tshuaj, tsuas yog ua lub luag haujlwm pabcuam. Putty hmoov ntxiv dej, rau ntawm phab ntsa, yog tshuaj lom neeg cov tshuaj tiv thaiv, vim hais tias muaj cov tiam ntawm cov khoom tshiab, putty hmoov rau ntawm phab ntsa los ntawm phab ntsa, hauv av rau hauv hmoov, thiab ces siv, nws tsis yog lawm, vim tau tsim ib tug cov khoom siv tshiab (calcium carbonate). Cov khoom tseem ceeb ntawm grey calcium hmoov yog: Ca (OH) 2, CaO thiab ib qho me me ntawm CaCO3 sib tov, CaO + H2O = Ca (OH) 2 - Ca (OH) 2 + CO2 = CaCO3↓ + H2O calcium tshauv hauv dej thiab huab cua nyob rau hauv qhov kev txiav txim ntawm CO2, tsim cov calcium carbonate, thiab HPMC tsuas yog dej tuav, pab calcium tshauv cov tshuaj tiv thaiv zoo dua, nws tus kheej tsis koom nrog cov tshuaj tiv thaiv.
Kev ua tau zoo ntawm hydroxypropyl methyl cellulose tuaj yeem ua kom zoo sib xws thiab cuam tshuam zoo hauv cov khoom siv cement mortar thiab plaster, thiab pob tag nrho cov khoom siv, thiab tsim ib txheej ntawm wetting zaj duab xis, cov dej noo nyob rau hauv lub hauv paus rau lub sij hawm ntev maj mam tso tawm, thiab inorganic cementitious khoom hydration tshuaj tiv thaiv. , yog li txhawm rau xyuas kom meej lub zog ntawm daim ntawv cog lus thiab compressive zog ntawm cov ntaub ntawv. Yog li ntawd, nyob rau lub caij ntuj sov kev tsim kho, kom ua tiav cov nyhuv tuav dej, yuav tsum tau ntxiv cov khoom zoo HPMC raws li cov qauv, txwv tsis pub, yuav qhuav sai heev thiab tshwm sim los ntawm dej tsis txaus, txo lub zog, tawg, khoob. nruas thiab poob tawm thiab lwm yam teeb meem zoo, tab sis kuj ua rau kom cov neeg ua haujlwm nyuaj tsim kho. Raws li qhov kub thiab txias, cov dej ntxiv los ntawm HPMC tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Post lub sij hawm: Sep-16-2022