Hydroxypropyl methylcellulose (HPMC)yog cov organic polymer tshuaj siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv mortars, coatings, adhesives thiab lwm yam khoom. Lub luag haujlwm tseem ceeb ntawm HPMC admixture yog txhawm rau txhim kho kev tsim kho ntawm mortar, txhim kho dej tuav thiab txuas ntxiv lub sijhawm qhib. Raws li qhov kev thov rau cov ntaub ntawv muaj txiaj ntsig zoo hauv kev tsim kho kev lag luam tseem nce ntxiv, daim ntawv thov ntawm HPMC tau txais kev saib xyuas dav.
1. Cov khoom tseem ceeb ntawm HPMC
HPMC yog cov dej-soluble cellulose ether nrog dej zoo, adhesion thiab thickening zog. Nws tuaj yeem txhim kho cov dej tuav ntawm mortar, txuas ntxiv lub sijhawm qhib, thiab txhim kho lub sag kuj thiab kev tsim kho ntawm mortar. Cov khoom zoo heev no ua rau HPMC yog ib qho ntawm cov khoom sib xyaw hauv mortar thiab lwm yam khoom siv hauv tsev.
2. Cov txheej txheem ziab ntawm mortar
Cov txheej txheem ziab ntawm mortar feem ntau suav nrog ob ntu: evaporation ntawm dej thiab cement hydration cov tshuaj tiv thaiv. Cement hydration yog lub hauv paus txheej txheem rau mortar curing, tab sis evaporation ntawm dej thaum ziab kuj plays lub luag haujlwm tseem ceeb. Cov dej noo hauv cov cement mortar yuav tsum tau maj mam tshem tawm los ntawm cov txheej txheem evaporation, thiab qhov ceev ntawm cov txheej txheem no ncaj qha cuam tshuam rau qhov zoo, durability thiab kev tsim kho tom ntej ntawm cov khoom tiav tom qab kev tsim kho.
3. Cov nyhuv ntawm HPMC rau mortar kom qhuav ceev
Kev cuam tshuam ntawm AnxinCel®HPMC admixture ntawm kev ziab ceev ntawm mortar feem ntau yog tshwm sim hauv ob yam: dej tuav thiab tswj dej evaporation.
(1) Txhim kho dej tuav thiab ua kom qhuav nrawm nrawm
HPMC muaj zog hydration thiab dej tuav cov khoom. Nws tuaj yeem tsim cov yeeb yaj kiab hydration hauv mortar kom txo cov evaporation sai ntawm cov dej. Qhov zoo dua cov dej tuav ntawm lub mortar, qhov qeeb qeeb nws dries vim tias cov dej khaws cia rau hauv lub mortar ntev dua. Yog li ntawd, tom qab ntxiv HPMC, cov txheej txheem evaporation ntawm cov dej hauv mortar yuav raug cuam tshuam rau qee yam, ua rau lub sijhawm ziab kom ntev.
Txawm hais tias qeeb ntawm cov dej evaporation tuaj yeem ua rau lub sijhawm ziab ntawm cov mortar, qhov kev ua kom qhuav qeeb no tau txais txiaj ntsig zoo, tshwj xeeb tshaj yog thaum lub sij hawm tsim kho, vim nws tuaj yeem tiv thaiv cov teeb meem xws li deg dryness thiab mortar cracking thiab xyuas kom muaj kev tsim kho zoo.
(2) Kev kho cov txheej txheem cement hydration
Lub luag haujlwm ntawm HPMC hauv cov cement mortar tsis txwv rau kev txhim kho dej tuav. Nws tseem tuaj yeem tswj cov txheej txheem hydration ntawm cov cement. Los ntawm kev hloov cov rheology ntawm mortar, HPMC tuaj yeem cuam tshuam qhov kev sib cuag ntawm cov cement hais thiab ya raws, yog li cuam tshuam rau hydration tus nqi ntawm cov cement. Qee zaum, qhov sib ntxiv ntawm AnxinCel®HPMC tuaj yeem ncua sijhawm me ntsis ntawm cov txheej txheem dej ntawm cov cement, ua rau cov tshuaj khib kom kho tau qeeb. Cov nyhuv no feem ntau yog ua tiav los ntawm kev kho cov cement particle loj tis thiab kev sib cuag ntawm cov cement hais, yog li cuam tshuam rau qhov ziab ceev.
(3) Adaptability rau ib puag ncig humidity
HPMC tuaj yeem txhim kho cov evaporation tsis kam ntawm mortar, ua rau cov mortar hloov mus rau ib puag ncig cov av noo. Nyob rau hauv ib puag ncig qhuav, cov dej khaws cia ntawm HPMC yog qhov tseem ceeb. Nws tuaj yeem ncua qhov poob ntawm qhov chaw noo noo thiab txo cov kab nrib pleb uas tshwm sim los ntawm kev ziab ntau dhau. Qhov no tseem ceeb tshwj xeeb tshaj yog nyob rau hauv qhov chaw kub lossis qhuav. Yog li ntawd, HPMC tsis tsuas yog kho cov dej evaporation tus nqi, tab sis kuj txhim khu kev hloov ntawm cov mortar rau sab nraud ib puag ncig, indirectly ncua lub sij hawm kom qhuav.
4. Yam cuam tshuam rau kev ziab kom ceev
Ntxiv rau qhov sib ntxiv ntawm HPMC admixture, qhov ziab ceev ntawm mortar kuj cuam tshuam los ntawm ntau lwm yam, suav nrog:
Mortar ratio: Qhov piv ntawm cov cement rau dej thiab qhov sib piv ntawm cov nplua aggregate rau coarse aggregate yuav cuam tshuam rau cov dej noo ntawm cov mortar thiab yog li ziab ceev.
Ib puag ncig tej yam kev mob: Kub, av noo thiab huab cua ncig tej yam kev mob yog ib yam tseem ceeb uas cuam tshuam rau lub ziab ceev ntawm mortar. Nyob rau hauv ib qho chaw ntawm qhov kub thiab txias, dej evaporates sai, thiab vice versa.
Mortar thickness: Lub thickness ntawm mortar ncaj qha cuam tshuam nws cov txheej txheem ziab. Thicker screeds feem ntau siv sij hawm ntev dua kom qhuav tag.
5. Kev xav txog kev siv tswv yim
Hauv kev siv tswv yim, cov kws tsim kho kev tsim kho thiab cov neeg ua haujlwm tsim kho feem ntau yuav tsum sib npaug ntawm qhov ziab nrawm ntawm cov mortar nrog kev ua haujlwm ntawm kev tsim kho. Raws li kev sib xyaw ua ke, HPMC tuaj yeem ncua sijhawm kom qhuav sai, tab sis qhov no yog qhov muaj txiaj ntsig zoo nyob rau hauv ib puag ncig uas yuav tsum tau tswj xyuas lub sijhawm tsim kho. Piv txwv li, nyob rau hauv high-temperature, huab cua-drying ib puag ncig, HPMC tuaj yeem tiv thaiv qhov chaw qhuav thiab tawg, ua kom muaj kev ua haujlwm zoo dua thiab ntev dua lub sijhawm qhib ntawm lub mortar thaum tsim kho.
Txawm li cas los xij, hauv qee qhov tshwj xeeb, xws li cov haujlwm uas yuav tsum tau ua kom qhuav sai ntawm cov tshuaj khib nyiab, nws yuav tsim nyog los tswj tus nqi ntawm cov tshuaj khib nyiab.HPMCntxiv lossis xaiv cov qauv uas tsis muaj HPMC kom ceev cov txheej txheem ziab.
Raws li cov tshuaj khib nyiab, AnxinCel® HPMC tuaj yeem txhim kho cov dej tuav ntawm mortar, txuas ntxiv lub sijhawm qhib, thiab cuam tshuam ncaj qha rau kev ziab ceev ntawm mortar. Tom qab ntxiv HPMC, qhov ziab ceev ntawm mortar feem ntau qeeb, uas muaj txiaj ntsig zoo rau kev zam kom tsis txhob muaj teeb meem xws li qhuav tawg thaum lub sij hawm tsim kho. Txawm li cas los xij, kev hloov pauv hauv kev ziab kom qhuav kuj cuam tshuam los ntawm ntau yam xws li mortar piv thiab ib puag ncig. Yog li ntawd, nyob rau hauv cov ntaub ntawv siv tau, tus nqi ntawm HPMC yuav tsum raug xaiv raws li cov xwm txheej tshwj xeeb kom ua tiav cov txiaj ntsig zoo tshaj plaws.
Post lub sij hawm: Jan-10-2025