Hydroxypropyl methyl cellulose
Teem sijhawm kuaj
Kev teeb tsa lub sij hawm ntawm cov pob zeb yog feem ntau cuam tshuam nrog lub sijhawm teem ntawm cov cement, qhov sib xyaw ua ke tsis loj, yog li lub sijhawm teeb tsa ntawm mortar tuaj yeem siv rau qhov chaw ntawm kev kawm ntawm HPMC rau underwater non-dispersion qhob teeb lub sij hawm, kev cuam tshuam ntawm kev sib tov vim lub sij hawm teem los ntawm dej-cement ratio ntawm mortar, cement xuab zeb ratio, thiaj li yuav soj ntsuam HPMC lub sij hawm ntawm cov cement thiab cov dej sib piv ntawm cov cement mortar ratio. yuav tsum tau kho.
HPMC yog macromolecule linear qauv, nrog hydroxyl pab pawg neeg ua haujlwm, uas tuaj yeem tsim hydrogen bonds nrog cov dej sib xyaw molecules thiab ua kom cov viscosity ntawm cov dej sib tov. HPMC ntev molecular chains yuav nyiam ib leeg, kom HPMC molecules intertwine nrog ib leeg los tsim ib tug network qauv, cov cement, sib tov dej qhwv. Vim tias HPMC tsim cov qauv sib txuas zoo ib yam li cov yeeb yaj kiab nyias thiab cov nyhuv qhwv ntawm cov cement, nws yuav tiv thaiv kom tsis txhob ya raws ntawm cov mortar, cuam tshuam los yog qeeb cov dej ntawm cov cement.
Kev ntsuam xyuas dej
Qhov tshwm sim ntawm cov dej los ntshav ntawm cov mortar zoo ib yam li cov pob zeb, uas yuav ua rau muaj kev sib haum xeeb loj, ua rau cov dej-cement piv ntawm cov txheej txheem saum toj kawg nkaus ntawm slurry, thiab ua rau cov txheej saum toj kawg nkaus ntawm cov slurry muaj cov yas zoo heev los yog tawg thaum ntxov, thiab lub zog ntawm txheej txheej slurry kuj tsis muaj zog. Los ntawm kev sim, nws tuaj yeem pom tau tias thaum qhov sib tov yog siab dua 0.5%, tsis muaj qhov tshwm sim ntawm cov dej ntws tawm. Qhov no yog vim thaumHPMCyog tov rau hauv mortar, HPMC muaj zaj duab xis tsim thiab network qauv, nrog rau cov adsorption ntawm hydroxyl ntawm cov saw ntev ntawm macromolecules, thiaj li hais tias cov cement nyob rau hauv mortar thiab sib tov dej daim ntawv flocculation, los xyuas kom meej cov qauv ruaj khov ntawm mortar lub cev. Tom qab ntxiv HPMC hauv mortar dua, ntau cov npuas me me ywj siab yuav raug tsim. Cov npuas no yuav muab sib npaug sib npaug hauv cov tshuaj khib nyiab thiab cuam tshuam qhov kev tso tawm ntawm cov aggregate. HPMC cov kev ua tau zoo ntawm cov cement raws li cov ntaub ntawv muaj kev cuam tshuam zoo, feem ntau siv los npaj xws li mortar qhuav, polymer mortar thiab lwm yam tshiab cement raws li cov ntaub ntawv sib xyaw, kom nws muaj dej tuav zoo, plasticity.
Post lub sij hawm: Apr-26-2024