HPMC (Hydroxypropyl Methylcellulose) siv nyob rau hauv qhuav-siv mortar yog ib qho tseem ceeb chemical additive, feem ntau yog siv los ua thickener, dej-retaining agent thiab film-forming agent. HPMC yog non-ionic cellulose ether ua los ntawm ntuj cellulose los ntawm kev hloov tshuaj. Nws yog dav siv nyob rau hauv cov ntaub ntawv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv qhuav-mix mortar.
1. Cov khoom tseem ceeb ntawm HPMC
HPMC yog ib qho polymer compound nyob rau hauv daim ntawv ntawm dawb los yog off-dawb hmoov, nrog rau cov yam ntxwv ntawm non-toxicity, odorlessness thiab zoo solubility. Nws tuaj yeem yaj hauv dej txias los tsim cov pob tshab lossis me ntsis milky viscous tov, thiab muaj kev ruaj ntseg zoo thiab adhesion. HPMC muaj cov khoom tsis-ionic, yog li nws tuaj yeem hloov mus rau ntau yam xov xwm, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig alkaline. Nws tseem tuaj yeem tswj hwm nws txoj haujlwm thiab tsis ua rau muaj tshuaj lom neeg.
Cov yam ntxwv tseem ceeb ntawm HPMC suav nrog:
Kev tuav dej: Nws tuaj yeem khaws cov dej noo hauv cov khoom, ua kom lub sijhawm ziab, thiab txhim kho qhov yooj yim ntawm kev tsim kho.
Thickening nyhuv: Los ntawm kev ua kom cov viscosity ntawm cov tshuaj khib, nws cov kev tsim kho yog txhim kho kom tsis txhob sagging thiab ntws.
Cov nyhuv lubricating: Txhim kho qhov ua haujlwm ntawm cov khoom siv thiab ua kom cov mortar smoother thaum lub sij hawm tsim kho.
Cov cuab yeej ua yeeb yaj kiab: Thaum lub sij hawm ziab ntawm cov mortar, ib qho yeeb yaj kiab tuaj yeem tsim, uas pab txhim kho lub zog ntawm cov khoom.
2. Lub luag haujlwm ntawm HPMC hauv cov tshuaj khib nyiab qhuav
Nyob rau hauv kev tsim kho tej yaam num, qhuav-mixed mortar (tseem hu ua premixed mortar) yog ib tug qhuav hmoov cov ntaub ntawv uas yog precisely formulated nyob rau hauv lub Hoobkas. Thaum lub sij hawm tsim kho, nws tsuas yog yuav tsum tau tov nrog dej ntawm qhov chaw. HPMC feem ntau ntxiv los txhim kho nws txoj kev tsim kho, txuas ntxiv lub sijhawm ua haujlwm thiab txhim kho qhov zoo ntawm cov khoom kawg. Tshwj xeeb, lub luag haujlwm ntawm HPMC hauv cov tshuaj khib nyiab qhuav suav nrog cov ntsiab lus hauv qab no:
Txhim kho kev tuav dej
Nyob rau hauv mortar, kev sib faib thiab khaws cia cov dej yog tus yuam sij kom ntseeg tau tias nws lub zog, kev sib raug zoo thiab kev ua haujlwm. Raws li tus neeg sawv cev tuav dej, HPMC tuaj yeem kaw cov dej hauv mortar thiab txo tus nqi ntawm cov dej. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov ntaub ntawv xws li cov cement thiab gypsum uas yuav tsum tau muaj kev cuam tshuam hydration. Yog tias cov dej poob sai dhau lawm, cov khoom siv yuav tsis tuaj yeem ua kom tiav cov tshuaj tiv thaiv hydration, ua rau txo qis zog lossis tawg. Tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, qhuav los yog absorbent puag puag, cov dej tuav nyhuv ntawm HPMC tuaj yeem txhim kho kev tsim kho thiab ua tiav cov khoom zoo ntawm cov mortar.
Txhim kho kev tsim kho kev ua haujlwm
Kev ua haujlwm ntawm cov mortar ncaj qha cuam tshuam qhov yooj yim ntawm kev ua haujlwm thaum lub sijhawm tsim kho. HPMC txhim kho cov viscosity thiab lubricity ntawm mortar, ua kom yooj yim rau kev khiav lag luam thaum lub sij hawm tsim kho. Txawm hais tias nws yog khawb, kis lossis txau, mortar uas muaj HPMC tuaj yeem ua tau zoo dua thiab sib npaug ntawm qhov chaw tsim kho, yog li txhim kho kev tsim kho thiab txo cov khoom pov tseg.
Txhim kho adhesion thiab anti-sagging zog
Cov nyhuv thickening ntawm HPMC tso cai rau lub mortar kom ruaj khov thaum lub sij hawm facade tsim thiab tsis nquag sagging los yog zawv zawg. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog rau daim ntawv thov scenarios xws li pobzeb sib txuas mortar, sab hauv thiab sab nrauv phab ntsa plastering mortar. Tshwj xeeb tshaj yog thaum tsim ib txheej mortar tuab, qhov kev ua tau zoo ntawm HPMC tuaj yeem ua kom muaj kev ruaj ntseg ntawm cov mortar thiab zam qhov teeb meem ntawm mortar txheej shedding vim qhov hnyav tuag ntau dhau.
Txuas lub sijhawm qhib
Hauv kev tsim kho tiag tiag, lub sijhawm qhib (piv txwv li, lub sijhawm ua haujlwm) ntawm mortar yog qhov tseem ceeb los xyuas kom meej qhov zoo ntawm kev tsim kho. Tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej loj ntawm kev tsim kho, yog tias lub mortar dries sai heev, nws yuav nyuaj rau cov neeg ua haujlwm tsim kho kom tiav tag nrho cov haujlwm, uas ua rau qhov tsis zoo ntawm qhov chaw. HPMC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm mortar, kom ntseeg tau tias cov neeg ua haujlwm tsim kho muaj sijhawm txaus los kho thiab ua haujlwm.
3. Qhov zoo ntawm kev siv HPMC
Dav adaptability
HPMC tuaj yeem siv dav hauv ntau hom kev sib xyaw qhuav mortars, xws li masonry mortar, plastering mortar, tile adhesive, self-leveling mortar, thiab lwm yam. stabilizing lub luag hauj lwm.
Tsawg ntxiv, ua haujlwm siab
Tus nqi ntawm HPMC feem ntau yog me me (li 0.1% -0.5% ntawm tag nrho cov hmoov qhuav), tab sis nws cov txiaj ntsig kev txhim kho yog qhov tseem ceeb heev. Qhov no txhais tau hais tias kev tsim kho kev ua tau zoo thiab qhov zoo ntawm mortar tuaj yeem txhim kho tau zoo yam tsis muaj nqi nce ntxiv.
Ib puag ncig tus phooj ywg thiab tsis muaj tshuaj lom
HPMC nws tus kheej tsis muaj tshuaj lom, tsis muaj ntxhiab, thiab tsis ua phem rau ib puag ncig. Nrog rau kev txhim kho ntawm ib puag ncig kev paub, qhov kev thov rau cov khoom siv vaj tsev ntsuab txuas ntxiv mus ntxiv. HPMC, raws li kev nyab xeeb thiab ib puag ncig tus phooj ywg chemical additive, ua tau raws li ib puag ncig cov qauv ntawm cov khoom siv niaj hnub no.
4. Ceev faj rau kev siv
Txawm hais tias HPMC ua lub luag haujlwm tseem ceeb hauv cov tshuaj khib nyiab qhuav, cov ntsiab lus hauv qab no yuav tsum raug sau tseg thaum siv:
Solubility tswj: HPMC yuav tsum tau maj mam ntxiv rau hauv dej thaum lub sij hawm stirring kom tsis txhob agglomeration vim tsis sib haum, uas cuam tshuam rau cov nyhuv kawg ntawm lub mortar.
Kev cuam tshuam ntawm qhov kub thiab txias: Lub solubility ntawm HPMC tuaj yeem cuam tshuam los ntawm qhov kub thiab txias. Cov dej kub dhau los yog qis dhau yuav ua rau muaj kev hloov pauv ntawm qhov sib cais, yog li cuam tshuam rau lub sijhawm tsim kho thiab cov nyhuv ntawm cov mortar.
Kev sib xyaw nrog lwm cov tshuaj ntxiv: HPMC feem ntau yog siv nrog lwm cov tshuaj ntxiv, xws li cov dej txo qis, cov khoom siv cua nkag, thiab lwm yam. Thaum tsim cov qauv, yuav tsum tau them nyiaj rau kev sib nrig sib cuam tshuam ntawm cov khoom kom tsis txhob muaj kev phiv tshuaj.
Daim ntawv thov ntawm HPMC nyob rau hauv qhuav-mixed mortar muaj qhov zoo tseem ceeb. Nws tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov mortar los ntawm kev txhim kho cov dej tuav, txhim kho kev tsim kho, thiab txhim kho adhesion. Nrog rau kev txhim kho kev tsim kho kom zoo thiab cov kev xav tau zoo hauv kev tsim kho kev lag luam, HPMC, uas yog ib qho tseem ceeb ntawm cov tshuaj ntxiv, yuav ua lub luag haujlwm tseem ceeb hauv cov tshuaj khib nyiab qhuav.
Post lub sij hawm: Oct-09-2024