HydroxyPropyyl Methylcellulose (HPMC)yog ib qho tshuaj tsw qab organic rau hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov neeg muaj tsib, tsho me, cov tshuaj nplaum, cov tshuaj nplaum, cov khoom lag luam. Lub luag haujlwm tseem ceeb ntawm HPMC admixture yog los txhim kho kev tsim kho ntawm cug, txhim kho cov dej khaws cia thiab txuas lub sijhawm qhib. Raws li qhov kev thov rau cov ntaub ntawv ua haujlwm siab hauv kev tsim kho kev tsim kho txuas ntxiv, daim ntawv thov HPMC tau txais kev saib xyuas dav dav.
1. Cov khoom yooj yim ntawm HPMC
HPMC yog cov dej-soluble cellulose ether nrog cov dej zoo, adhesion thiab thickenion cov khoom. Nws tuaj yeem txhim kho cov dej tshem tawm, txuas lub sijhawm qhib, thiab txhim kho cov sag tiv thaiv thiab txhim kho ntawm collple. Cov khoom zoo tshaj plaws ua HPMC ib qho ntawm cov khoom admixtures hauv tshuaj khib thiab lwm yam khoom siv hauv tsev.
2. Kom huv cov txheej txheem ntawm cug
Cov txheej txheem ziab khaub ncaws ntawm lub tshuaj khib feem ntau suav nrog ob qhov chaw: evaporation ntawm dej thiab xis mas dej ntawm cov dej cawv. Maslim dej yog thawj lub tshuab Lub noo noo nyob rau hauv lub cement cug yuav tsum tau maj mam maj mam muab tua los ntawm kev ua tau zoo, durability thiab tom qab cov khoom tiav tom qab kev tsim kho.
3. Cov nyhuv ntawm HPMC ntawm kev tshuaj khib kev khib kom qhuav
Tus cuam tshuam ntawm kev txhawj xeeb ®
(1) Txhim kho cov dej txuag thiab qeeb qeeb kom qhuav
HPMC muaj cov khoom siv dej thiab dej kom muaj zog. Nws tuaj yeem tsim zaj duab xis hauv lub tshuaj khib nyiab kom txo cov dej evaporation sai sai. Qhov zoo dua cov dej tuav ntawm lub tshuaj khib, qeeb qeeb nws dries vim tias cov dej yog khaws cia rau hauv cutp rau lub sijhawm ntev dua. Yog li ntawd, tom qab ntxiv hpmc, txheej txheem evaporation ntawm cov dej hauv cug cug yuav txwv rau qee yam, uas ua rau lub sijhawm ziab khaub ncaws ntev.
Txawm hais tias maj mam poob ntawm cov dej cua sov tuaj yeem ncua sijhawm ntawm cov txheej txheem tsim kho, raws li nws tuaj yeem ua kom cov txheej txheem ua kom ntub dej thiab tshuaj khib tawg thiab ua kom tau zoo.
(2) hloov kho cov txheej txheem cement
Lub luag haujlwm ntawm HPMC hauv ceelent cug tsis txwv los txhim kho cov dej rov qab. Nws tseem tuaj yeem tswj cov txheej txheem hydration ntawm cov cement. Los ntawm kev hloov pauv rheb cug, hpmc tuaj yeem cuam tshuam rau kev sib cuag ntawm Caas hais thiab noo, yog cuam tshuam rau cov kev ua kas ntawm cov cement. Muaj qee kis, kev sib ntxiv ntawm kev ntxhov siab ® me ntsis kev ncua cov txheej txheem hydration ntawm cov cement, ua rau lub tshuaj khib los kho cov neeg qeeb qeeb. Cov nyhuv no feem ntau yog ua tiav los ntawm kev kho cov Maas particle loj faib thiab cov kev sib cuag ntawm Caas hais, yog li cuam tshuam rau kev ziab nrawm.
(3) hloov kho rau ib puag ncig cov av noo
HPMC tuaj yeem txhim kho cov evaporation resistrance cug cug, ua lub tshuaj khib ntau yoog kom muaj cov av noo. Nyob rau hauv ib puag ncig qhuav, dej ua kom ruaj khov ntawm HPMC yog qhov tseem ceeb tshaj plaws. Nws tuaj yeem ncua kev poob ntawm cov dej noo thiab txo cov kab nrib pleb los ntawm kev ziab ntau dhau. Qhov no yog qhov tseem ceeb tshwj xeeb hauv qhov chaw kub lossis qhuav. Yog li ntawd, HPMC tsis yog kho cov dej evaporation tus nqi, tab sis kuj txhim kho qhov yoog raws li lub colle rau sab nraud ib puag ncig, tsis ncaj rau kev ziab lub sijhawm kom qhuav.
4. Qhov xwm txheej cuam tshuam rau kev ziab nrawm
Ntxiv nrog rau kev sib ntxiv ntawm HPMC admixture, kev ziab ceev ntawm cug kuj tseem cuam tshuam los ntawm ntau lwm yam, suav nrog:
Tshuaj khib sib xyaw: cov piv ntawm cov cement rau dej thiab cov kev sib piv ntawm cov neeg noo noo yuav cuam tshuam rau cov ntsiab lus noo ntawm lub tshuaj khib thiab yog li lub ziab nrawm.
Cov xwm txheej ib puag ncig: kub thiab cua cov xwm txheej yog qhov tseem ceeb uas cuam tshuam rau kev ziab cov tshuaj khib. Nyob rau hauv ib puag ncig ntawm kev kub siab thiab cov av noo, dej evaporates sai dua, thiab vice versa.
Tshuaj khib tuab: Cov tuab ntawm cult hlau ncaj qha cuam tshuam nws cov txheej txheem ziab. Thicker screeds feem ntau siv sijhawm ntev dua kom qhuav.
5. Cov ntaub ntawv thov kev txiav txim siab
Hauv kev siv cov kev siv, cov kws ua haujlwm tsim kho thiab cov neeg ua haujlwm tsim khoom feem ntau yuav tsum tau sib npaug ntawm kev tshuaj khib nyiab nrog lub zog ua haujlwm ntawm kev tsim kho. Raws li admixture, HPMC tuaj yeem ncua kev ziab nrawm, tab sis cov yeeb yam no muaj txiaj ntsig zoo nyob rau hauv cov chaw ua haujlwm tsim kho. Piv txwv li, hauv qhov ntsuas kub, huab cua qhuav kom tiv thaiv cov chaw qhuav thiab tawg, ua kom lub sijhawm qhib ntawm lub tshuaj khib thaum kev tsim kho.
Txawm li cas los xij, hauv qee kis tshwj xeeb, xws li cov haujlwm uas yuav tsum tau ziab kom qhuav ntawm cug khw, nws yuav tsim nyog los tswj cov nyiaj ntawmHPMCNtxiv lossis xaiv cov mis uas tsis muaj HPMC kom nrawm nrawm rau cov txheej txheem ziab.
Raws li lub tshuaj txig admixture, ntxhov siab HPMC tuaj yeem txhim kho cov dej cultion ntawm culture ntawm culture ntawm culture ntawm culture ntawm lub sijhawm qhib, thiab tsis ncaj qha rau kev ziab cov tshuaj khib. Tom qab ntxiv HPMC, qhov ziab nrawm ntawm colle feem ntau qeeb qeeb, uas muaj qhov cuam tshuam zoo rau kev zam cov teeb meem xws li kev sib tsoo qhuav thaum kev tsim kho. Txawm li cas los xij, kev hloov pauv hauv kev ziab nrawm kuj cuam tshuam los ntawm ntau yam xws li tshuaj khib piv thiab ib puag ncig. Yog li ntawd, hauv cov ntawv thov siv, tus nqi HPMC yuav tsum raug xaiv los ntawm cov mob tshwj xeeb kom ua tiav cov nyhuv zoo tshaj plaws.
Lub Sijhawm Post: Jan-10-2025