HPMC (Hydroxypropyl Methylcellulose)yog ib tug tseem ceeb tshuaj additive lug siv nyob rau hauv pobzeb cement nplaum. Raws li cov dej-soluble polymer, HPMC muaj cov thickening zoo, dej tuav, kev sib txuas thiab cov yeeb yaj kiab tsim cov khoom, ua rau nws yog ib qho tseem ceeb hauv kev tsim kho thiab cov khoom siv hauv tsev.
1. Lub luag haujlwm ntawm HPMC hauv pobzeb cement nplaum
Hauv kev tsim cov pobzeb cement nplaum, HPMC feem ntau ua lub luag haujlwm ntawm thickening, dej tuav thiab txhim kho kev tsim kho. Txij li cov pobzeb nplaum yog cov khoom siv tsis zoo raws li cov cement mortar, cement xav tau dej thaum lub sijhawm kho. Yog tias dej poob sai dhau thaum lub sijhawm kho, cov tshuaj tiv thaiv cement hydration tsis txaus, uas yuav ua rau txo qis kev sib raug zoo thiab txawm tias tawg. Yog li ntawd, cov dej tuav cov nyhuv ntawm HPMC yog qhov tseem ceeb tshwj xeeb. Nws tuaj yeem kaw dej hauv cov nplaum, ua kom cov cement tag nrho, thiab yog li txhim kho lub zog sib txuas.
HPMC muaj cov nyhuv thickening hauv cov nplaum, uas ua rau cov nplaum nplaum zoo dua rau kev tsim kho thaum lub sij hawm tsim kho, tiv thaiv kev sib tsoo thiab sagging, thiab txhim kho kev tsim kho yooj yim. Tsis tas li ntawd, HPMC tuaj yeem kho cov viscosity thiab sib xws ntawm cov nplaum, yog li ua kom nws cov dej ntws zoo thiab ua kom yooj yim rau nws siv hauv cov xwm txheej sib txawv xws li cov phab ntsa thiab cov plag tsev. Cov cuab yeej ua yeeb yaj kiab yog lwm qhov tseem ceeb ntawm HPMC. Nws tuaj yeem tsim cov yeeb yaj kiab hloov pauv ntawm qhov chaw ntawm cov cement adhesives, ua kom lub zog sib txuas, thiab txhim kho qhov tawg ntawm cov nplaum.
2. Qhov tseem ceeb ntawm HPMC
Kev tuav dej: HPMC lub peev xwm tuav dej yog qhov tseem ceeb rau nws siv los ua cov nplaum nplaum. Cov dej tuav tau zoo tuaj yeem tiv thaiv dej los ntawm evaporating sai heev, yog li cov cement mortar tuaj yeem ua kom muaj dej txaus thaum lub sijhawm kho, yog li txhim kho kev sib koom ua ke zoo heev. Rau cov txheej txheej nyias, HPMC tuaj yeem ua kom cov dej sib xws ntawm cov cement thiab tiv thaiv kev tawg los ntawm kev poob dej tsis sib xws.
Cov nyhuv Thickening: Hauv cov nplais cement nplaum, HPMC muaj cov khoom tseem ceeb thickening. Los ntawm kev ntxiv qhov tsim nyog ntawm HPMC, qhov viscosity ntawm cov nplaum tuaj yeem hloov kho kom txhim kho kev ua haujlwm thaum lub sijhawm tsim kho, yog li xyuas kom cov vuas yuav tsis swb tom qab muab tshuaj txhuam. Cov nyhuv thickening no yog qhov tseem ceeb tshwj xeeb thaum lub sij hawm tsim kho phab ntsa, tso cai rau tus neeg tsim khoom kom tswj tau qhov fluidity thiab adhesion ntawm cov nplaum.
Txhim kho kev sib raug zoo: HPMC kuj tuaj yeem txhim kho kev sib koom ua ke hauv cov cement nplaum, tshwj xeeb tshaj yog ntawm cov substrate du. Nws cov khoom ua yeeb yaj kiab tuaj yeem tsim cov yeeb yaj kiab hloov pauv ntawm cov nplaum nplaum, txhim kho cov kav dej thiab dej tsis kam ntawm cov khoom, ua rau cov pobzeb tso kom ruaj ntseg.
Kev tsim kho kev ua haujlwm: Kev sib ntxiv ntawm HPMC tsis tsuas yog txhim kho kev ua haujlwm ntawm cov nplaum, tab sis kuj txo qhov nyuaj ntawm kev tsim kho. HPMC nrog cov viscosity tsim nyog tuaj yeem txhim kho cov nyhuv lubrication ntawm cov nplaum, txo qhov kev tiv thaiv thaum lub sij hawm thov, thiab xyuas kom meej tias cov nplaum tuaj yeem sib npaug ntawm cov substrate. HPMC kuj tseem ruaj khov rau qhov kub thiab txias thiab tsim nyog siv rau ntau lub caij thiab huab cua, yog li hloov mus rau ntau qhov chaw tsim kho.
3. Cov nyhuv ntawmHPMCntawm kev ua haujlwm ntawm cov nplais cement nplaum
Tus nqi ntawm HPMC ntxiv rau cov nplais cement nplaum ncaj qha cuam tshuam rau kev ua haujlwm ntawm cov nplaum, thiab cov nyiaj ntxiv yog feem ntau ntawm 0.1% thiab 0.5%. HPMC tsawg dhau yuav txo cov dej tuav thiab ua kom cov nplaum tsis muaj zog; thaum ntau dhau yuav ua rau cov viscosity ntau dhau thiab cuam tshuam rau kev tsim kho fluidity. Yog li ntawd, nws yog qhov tseem ceeb los xyuas kom meej qhov ua tau zoo ntawm cov nplaum kom tsim nyog kho tus nqi ntawm HPMC ntxiv raws li kev tsim kho sib txawv.
Dej tsis kam thiab huab cua tsis kam: HPMC txhim kho cov dej tsis kam ntawm cov cement nplaum, tso cai rau nws kom muaj zog thiab ruaj khov nyob rau hauv qhov chaw ntub dej lossis dej nplua nuj. Qhov no feature yog tshwj xeeb tshaj yog ib qho tseem ceeb rau tso cov vuas nyob rau hauv qhov chaw ntub dej xws li chav dej thiab chav ua noj. Tsis tas li ntawd, HPMC kuj tseem txhim kho huab cua tsis kam ntawm cov nplaum, ua kom nws hloov mus rau qhov hloov pauv ntawm qhov kub thiab txias thiab zam kev ua haujlwm tsis zoo los ntawm ib puag ncig ib puag ncig.
Kev txuas ntxiv ntawm lub sijhawm qhib: Cov dej khaws cia ntawm HPMC txuas ntxiv lub sijhawm qhib ntawm cov nplais nplaum, tso cai rau cov neeg ua haujlwm tsim kho kom muaj sijhawm txaus los kho qhov chaw ntawm cov vuas thiab txo qhov tshwm sim ntawm kev rov ua haujlwm thaum lub sijhawm tsim kho. Nyob rau tib lub sijhawm, qhov txuas ntxiv ntawm lub sijhawm qhib kuj txhais tau hais tias cov nplaum nplaum tsis yooj yim kom qhuav sai sai thaum tsim tsev nyob rau hauv qhov kub thiab txias, uas yog qhov tsim nyog rau kev ua haujlwm zoo.
Los tiv thaiv sagging: Thaum tsim rau ntawm qhov chaw ntsug, cov nyhuv thickening ntawm HPMC tiv thaiv cov nplaum los ntawm zawv zawg thiab txhim kho kev ua haujlwm zoo. Tshwj xeeb tshaj yog nyob rau hauv kev tso cov vuas loj, cov tshuaj tiv thaiv ntawm HPMC yog qhov ua tau zoo dua qub, kom ntseeg tau tias cov vuas loj tuaj yeem txuas mus rau phab ntsa ua ntej cov nplaum kho.
Raws li ib qho tseem ceeb additive nyob rau hauv pobzeb cement nplaum,HPMCho txhim kho kev tsim kho kev ua tau zoo thiab kev sib koom ua ke ntawm cov nplaum nrog nws cov dej zoo khaws cia, thickening, zaj duab xis-tsim thiab kev sib txuas cov khoom. Kev xaiv tsim nyog thiab kev faib tawm ntawm HPMC ntau npaum li cas tuaj yeem tsis tsuas yog txhim kho ntau yam khoom ntawm lub cev ntawm cov nplaum, tab sis kuj hloov mus rau cov kev xav tau ntawm ntau qhov chaw tsim kho, muab qhov ruaj khov thiab ua tau zoo ntawm cov pobzeb paving rau cov tsev niaj hnub. Nyob rau yav tom ntej, nrog kev nce qib ntawm kev tsim kho thev naus laus zis thiab tib neeg txoj kev nrhiav lub tsev zoo, daim ntawv thov kev cia siab ntawm HPMC yuav dav dua.
Post lub sij hawm: Nov-14-2024