HydroxyPropyyl methylcellulose (HPMC)yog cellulose tseem ceeb ether compound siv dav dav hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cement-raws li cov ntaub ntawv cortars, cov khoom siv gypsum-raws li cov ntaub ntawv thiab txheej txheem. HPMC ua si lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom cug cug, suav nrog kev txhim kho nws cov khoom tsis muaj dej.
1. Txhim kho cov dej ceev ceev ntawm cug
Ib qho ntawm cov muaj txiaj ntsig tshaj plaws ntawm HPMC yog nws lub peev xwm ua haujlwm tau zoo. Ntxiv HPMC rau tshuaj khib tau tuaj yeem txo qis tus nqi ntawm cov dej poob hauv lub tshuaj khib. Cov kev ua tau zoo yog:
Txuas ntxiv lub cegent dej sawv sawv ntsug lub sijhawm: HPMC tuaj yeem tswj cov av noo thiab ua kom pom tseeb tias cov Maas yaum cov dej kom muaj cov khoom siv dej Denser.
Tiv thaiv kev tsim ntawm cov nrib pleb: dej sai sai yuav ua rau lub cug ua paug kom ntsws thiab pib ua kom muaj cov khoom waterproofing.HPMCtuaj yeem qeeb tus nqi ntawm cov dej poob thiab txo cov kab nrib pleb tshwm sim los ntawm qhuav shrinkage.
Kev txhim kho hauv dej tswj kev ua tau ua rau cov qauv sab hauv ntawm lub porosetability, thiab cuam tshuam ntau dua cov imposity ntawm lub cug, yog li tau txhim kho nws qhov kev ua haujlwm tsis zoo.
2. Txhim kho qhov ua haujlwm ntawm cug
Tus yam ntxwv viscosity ntawm HPMC txhim kho lub rheological cov yam ntxwv ntawm lub tshuaj khib, yog li kev txhim kho nws cov haujlwm:
Txo los ntshav: HPMC tuaj yeem faib dej tusyees, pub dej yuav tsum tau faib rau hauv lub tshuaj khib thiab txo qhov sib cais los ntawm dej sib cais.
Txhim kho cov nplaum ntawm cov nplaum: HPMC txhim kho txoj kev colle thiab cov khoom siv hluav taws xob kom pom zoo los ntawm cov kev sib xyaw ntawm cov khoom siv hauv paus thiab cug. Cov.
Kev txhim kho ntawm kev ua haujlwm zoo cuam tshuam rau cov khoom siv dej tsis muaj txiaj ntsig ntawm cug. Tshuaj khib nyiab thiab cov hlau tuab npog txheej tuaj yeem tiv thaiv ya raws noo noo kev hlav.
3. Ua ib zaj yeeb yaj kiab saum npoo av
HPMC muaj cov khoom siv ua yeeb yaj kiab thiab tuaj yeem tsim cov yeeb yaj kiab nyias thiab tuab thiab siv cov yeeb yaj kiab ntawm lub cug tshuaj khib:
Txo cov dej evap ntawm: Tom qab kev tsim kho tiav, HPMC yuav ua ib zaj yeeb yaj kiab tiv thaiv nyob rau saum npoo ntawm cov dej khov ntawm cov chaw sib tov ntawm sab nraud ntawm cov chaw sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud ntawm sab nraud.
Thaiv ya raws: Cov txheej HPMC tom qab kev tsim duab yeeb yaj kiab muaj qee cov teeb meem los tiv thaiv kev tiv thaiv sab nraud ntawm cov tshuaj cug.
Qhov kev tiv thaiv saum npoo no muab kev tiv thaiv ntxiv rau cov khoom waterproofing ntawm lub cug.
4. Txo cov porosity ntawm cug
HPMC tuaj yeem txhim kho microstructure ntawm cug cug. Nws cov tshuab ntawm kev ua yog raws li hauv qab no:
Sau cov nyhuv: hpmc molecules tuaj yeem nkag mus rau hauv lub micrroporous nyob rau hauv lub tshuaj khib thiab ib feem sau cov pores, yog li txo cov dej noo.
Txhim khu cov khoom siv hauv cov dej noo: Los ntawm cov dej khaws cia, hpmc txhim kho cov khoom sib txawv thiab kev sib txuas ntawm cov xis nyob ntawm cov kab cug.
Kev txo cov tshuaj khib portosity tsis tsuas yog ua kom muaj kev ua dej pheeb suab, tab sis kuj tseem txhim kho lub zog ntawm lub cug.
5. Txhim Kho Ntshiab Ua Ntej thiab Lub Neej
Kev nkag mus rau dej yuav ua rau lub cug ua paug kom raug puas vim yog te ncu hauv cov chaw kub tsawg. Cov nyhuv dej tawm ntawm HPMC tuaj yeem txo qhov kev nkag mus rau qhov dej thiab txo qhov kev puas tsuaj rau kev siv tshuaj khib nyiab los ntawm khov-thaw cycles:
Tiv thaiv noo noo kev khaws cia: Txo kom noo noo khaws cia hauv cov tshuaj khib thiab txo cov nplooj tele kub nyhuv.
Txuas lub neej zoo lub neej: los ntawm kev txo dej nres thiab khov-thau kev puas tsuaj, HPMC nce lub sijhawm ua haujlwm ntev ntawm kev sib sau.
HPMC txhim kho cov dej pheeb suab ntawm college cultion: txhim kho cov dej ua haujlwm, ua kom muaj zog ua haujlwm, ua kom pom cov yeeb yaj kiab thiab txhim kho Frost tsis kam. Cov nyhuv synergistic ntawm cov khoom no ua rau lub cug ua kom pom cov txiaj ntsig waterproof zoo dua hauv kev siv. Txawm hais tias nyob rau hauv waterproofing mortars, tus kheej txoj kev ploj kev quaj ntsuag lossis pobzeb nplaum, HPMC ua si lub luag haujlwm tseem ceeb.
Hauv kev siv cov kev siv, tus nqi HPMC ntxiv kom ntseeg tau tias nws tsis tuaj yeem siv qhov sib npaug ntawm lwm cov txuj ci ua haujlwm ntawm lub tshuaj khib. Los ntawm kev siv hluav taws xob HPMC, kev ua haujlwm tsis muaj dej ntawm cov ntaub ntawv tsim tsev tuaj yeem hloov kho tau zoo thiab muaj peev xwm txhim khu kev qha zoo tuaj yeem muab rau cov haujlwm tsim kho.
Lub Sijhawm Post: NOV-23-2024