HydroxyPropyyl methylulose (HPMC) yog cov dej tsis-ionic-soluble polymer compound, tshwj xeeb tshaj yog nyob rau hauv kev hloov kho cov khoom siv cement-raws. HPMC muaj cov nplaum zoo, kev ua yeeb yaj kiab, zaj duab xis, yog li nws yog cov khoom xyaw, yog li ntawd, tus nqi ntawm kev siv thiab cov cai siv.
1. Cov yam ntxwv yooj yim thiab cov haujlwm ntawm HPMC
Raws li kev ntxiv rau Maas, HPMC tseem cuam tshuam rau kev ua tau zoo ntawm cov cement los ntawm cov txheej txheem hauv qab no:
Dej khaws cia: HPMC tuaj yeem ncua kev ncua cov dej evasas, yog li tsis txhob tawg thaum ntxov tawg los ntawm kev loj hlob ntawm cov dej.
Thickening nyhuv: HPMC muaj cov nyhuv tuab, uas tuaj yeem ua rau cov cement muab cov txheej txheem kev tsim kho dua tshiab thaum lub cuab yeej tsim kho.
Txhim kho covhiology: HPMC tuaj yeem hloov kho cov khoom sib dhos ntawm cov ntxhib muab tshuaj thiab ua kom zoo dua qub thiab zam kev tsis sib xws thaum kev tsim kho.
Anti-teeb tsa cov cuab yeej: Vim yog cov qauv molecular ntawm HPMC, nws pab txhawm rau txhim kho qhov chaw ruaj khov ntawm cov nplais thiab tiv thaiv sedimentation ntawm cov nqaij ntsuab slurry.
2. Cov nyhuv ntawm HPMC ntawm ntau hom Maas
(1) Cov Portland Mement (OPC)
Cov Portland xis mas yog qhov feem ntau siv hom xis mas. Lub luag haujlwm ntawm HPMC hauv nws yog qhov tseem ceeb ntawm cov hauv qab no:
Txhim kho cov haujlwm ua haujlwm: Thaum siv OPC, qee qhov nyiaj ntawm cov dej feem ntau ntxiv. HPMC tuaj yeem txhim kho nws cov khoom siv hluav taws xob thiab qhov ruaj khov ntawm cov slurry los ntawm cov cement slurry los yog ziab nrawm dhau thaum kev tsim kho.
Kev ncua sijhawm ua haujlwm lub sijhawm: HPMC tuaj yeem ncua sijhawm lub sijhawm hloov lub sijhawm ntawm xis mas thiab tiv thaiv cov cement ntawm qhov chaw ntxov. Nws yog qhov tshwj xeeb rau kev tsim kho loj lossis qhov chaw siab.
Kev Txhim Kho Cov Dej Tuav Tseg: HPMC txhim kho cov hmoov av maj mam dhau los thaum lub sij hawm kho kom nrawm, yog txhim kho lub zog kev txhim kho ntawm cov cement.
(2) High-alumina Maas
Vim yog qhov sib cais ntawm cov zaub mov cais tawm hauv nws cov tshuaj lom neeg muaj kuab lom, qoob loo ntau muaj lub zog nrawm dua tom qab ua kom tawv nqaij tawv. Txawm li cas los xij, vim muaj dej kub siab ntawm high-alumina xisas, kab nrib pleb thiab lwm yam teeb meem feem ntau tshwm sim thaum kev tsim kho. Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho nws cov khoom hauv qab no:
Kev rho tawm cov tshuaj tiv thaiv dej: HPMC tuaj yeem ncua cov tshuaj tsw qab ntawm cov cement, tshwj xeeb tshaj yog nyob rau hauv thaum ntxov ntawm high-alument, txo nws cov dej ua kom sov thiab tiv thaiv cov kab nrib pleb.
Txhim kho cov fluidity: cov cement muab tshuaj ntsuab ntawm high-alumina xis mas muaj fluidity tsis zoo. HPMC pab txhawm rau txhim kho fluidity thiab cov ris tsho sib txawv thaum lub sijhawm kev tsim kho los ntawm kev nce viscosity thiab txhim kho kev ruaj ntseg ntawm cov tshuaj txhuam.
Kev Txhim Kho Kev Tiv Thaiv Tsis kam: Cov dej khaws cia ntawm HPMC txhim kho kev kho tus mob ntawm high-alument thiab zam kev tawg tshwm sim los ntawm ntau dhau ntawm evaporation dej.
(3) Maas dawb
Dawb txoj cai xis mas siv nyob rau hauv vaj tse zoo nkauj thiab cov tsev ua haujlwm tshwj xeeb. Qhov cuam tshuam tseem ceeb ntawm HPMC hauv dawb xis mas yog:
Kev txhim kho cov nplaum thiab dej tsis kam: HPMC tuaj yeem nce lub zog adhesion ntawm dawb xis mas, tshwj xeeb hauv ib puag ncig huab cua. Dawb txoj kev ntseeg yog feem ntau yog siv nyob rau sab nrauv txheej phab ntsa thiab cov khoom siv dai kom zoo nkauj. Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho nws cov dej tsis kam thiab huab cua tsis kam.
Txhim kho cov fluolity thiab kev tsim kho cov kev ua tau zoo: dawb ntshiab yuav tsum muaj kev kub ntxhov thiab kev sib txuam ua kom siab zoo thaum kev tsim kho. HPMC tuaj yeem txhim kho kev sib txawv ntawm cov slurrine, zam qhov tsis sib xws ntawm cov xis dawb thaum tsim, thiab ua kom lub tiaj yam ntawm txheej.
(4) Kev npau taws sai
Kev nrawm nrawm yog txoj kev siv nyiaj ntau heev thiab yog qhov tsim nyog rau cov haujlwm uas xav tau kev tsim kho sai. Daim ntawv thov ntawm HPMC nyob rau hauv sai-ua kom tawv dawb yog qhov yooj yim pom hauv:
Kev ncua sij hawm teeb tsa: Kev noj qab haus huv sai sai ntawm kev ua kom lub sijhawm ua kom tiav thaum lub sijhawm ua ntej lub sijhawm xis mas, kom muaj kev tsim kho kom tiav rau hauv lub sijhawm luv luv.
Kho tus nqi ntawm hydration: HPMC tuaj yeem hloov kho tus nqi ntawm cov txiv xis thiab cov khoom sib txawv ntawm cov cement, ua rau nws muaj peev xwm hloov kho tau.
Txhim kho cov kev tswj hwm ntawm lub sijhawm tsim kev tsim kho: Kev siv HPMC tuaj yeem txuas ntxiv lub sijhawm qhib kev tsim kho, muab sijhawm rau cov neeg siv khoom siv ntxiv los hloov kho thiab tsim kho.
(5) Cov Txiv Neej Thaum Tshav Kub Ntxoo
Tsawg-kub xis mas siv nyob rau hauv loj-ntim Qhob cov phiaj xwm los txo cov cua sov tso tawm thaum tso pa taws. Lub luag haujlwm ntawm HPMC hauv cov txiv xis qis-kub muaj xws li:
Txo cov dej ua kom sov: qis-sov xis mas siv hauv cov xwm txheej uas cov cua sov uas ua kom cua sov. HPMC tuaj yeem tswj lub fluidity ntawm cov ntxhib muab tshuaj txhuam thiab txo cov kev sib txuam ntawm thaum ntxov hydration tshav kub, yog li kev zam lub tiam kev kub sib tsoo.
Kev txhim kho cov dej tuav tseg ntawm Maas: Txij li thaum muaj cov cement muaj peev xwm ua kom cov Maas muab tso tawm noo noo thiab txhawb txoj kev loj hlob ntawm Maas.
3. Kev ceev faj hauv kev siv HPMC
Txawm hais tias HPMC ua haujlwm tau zoo nyob rau hauv Maas, nws siv tseem yuav xav txog qhov hauv qab no:
Kev tswj ntau tshuaj tswj: tus nqi HPMC ntxiv yuav tsum tau ua kom zoo raws li hom Maas thiab cov kev xav tau tiag tiag. Yog tias muaj ntau ntxiv, nws yuav cuam tshuam rau lub zog thiab qhov ua kom tawv nqaij tawv; Yog tias muaj tsawg dua, nws qhov kev ua tau zoo yuav tsis yog exerted.
Compatibility nrog lwm Admixtures: HPMC tuaj yeem cuam tshuam nrog kev hloov kho dej (xws li cov dej ntws, thiab lwm yam), yog li ntawd yog cov qauv ua kom zoo dua.
Kev Cia Cov neeg muaj cai ntawm Maas: kev ua haujlwm ntawm HPMC hauv kev hloov pauv tau cuam tshuam los ntawm kev khaws cia ntawm cov xis mas. Yog li ntawd, hauv kev tsim kho tiag tiag, saib xyuas yuav tsum tau them rau qhov chaw khaws cia ntawm cov cement tsis ua tiav kev ua tiav ntxov.
Raws li Maas Additive, HPMC ua si lub luag haujlwm tseem ceeb hauv ntau hom Maas. Nws tuaj yeem txhim kho kev tsim kho kev tsim kho thiab kev ua kom zoo tshaj plaws los ntawm kev txhim kho lub fluasy ntawm xis mas, ncua sij hawm teem sijhawm. Raws li cov yam ntxwv ntawm cov kev hloov pauv sib txawv ntau yam, cov kev xaiv tsim nyog ntawm HPMC tuaj yeem ua kom tiav cov cement thiab ua tau raws li kev siv hloov tshiab.
Lub sijhawm Post: Feb-15-2025