HydroxyPropyyl methylulose (HPMC) yog cov tsis-ionic, dej-soluble polymer muab tau los ntawm ntau yam lag luam, suav nrog cov tshuaj, thiab kev tsim kho. Nyob rau hauv cov ntsiab lus ntawm cement-raws grouting, HPMC ua haujlwm ntau yam tseem ceeb uas txhim kho kev ua tau zoo thiab ua haujlwm ntawm cov grout.
1. Rheology hloov kho
HPMC ntau hloov kho cov rheological yam ntxwv ntawm cov cement-raws guts. Rheology yog hais txog kev coj tus cwj pwm ntws ntawm cov grout sib tov, uas yog qhov tseem ceeb rau cov ntawv thov tswj tau cov grout sib xws thiab workability. Los ntawm kev ntxiv hpmc, lub viscosity ntawm cov grout tuaj yeem hloov kho, tso cai rau kev nqus nqus thiab yooj yim. Qhov no yog qhov tshwj xeeb tshaj yog rau grouts siv nyob rau hauv cov chaw uas nyuaj rau kev nkag tau lossis xav tau cov tswv yim tshwj xeeb.
Viscosity li: HPMC nce viscosity ntawm cov grocosity ntawm cov groundcosity ntawm cov groundcosity, tiv thaiv kev cais tawm ntawm cov cheebtsam thiab ua kom muaj kev sib xyaw ua ke. Cov cuab yeej no tau txais txiaj ntsig zoo rau kev tswj cov homogeneity ntawm cov grout thaum lub ntawv thov.
Thixotropy: Lub thixotropic xwm ntawm HPMC-hloov Grouts txhais tau tias lawv tuaj yeem ua tsawg dua viscous nyob rau hauv shear kev nyuaj siab (piv txwv li kev sib xyaw ua ke thaum cov kev ntxhov siab raug tshem tawm. Tus cwj pwm no yuav pab tswj cov duab thiab kev ruaj khov ntawm cov grout tom qab chaw.
2. Dej ceev ceev
Ib qho ntawm cov luag haujlwm tseem ceeb tshaj plaws ntawm HPMC hauv cov cement-raws li gutsws yog nws lub peev xwm los txhim kho cov dej khaws cia. Mash hydration, cov txheej txheem tshuaj uas muab cement nws lub zog, yuav tsum tau muaj dej txaus. HPMC pab hauv cov dej hauv cov dej hauv cov grout sib tov, uas ua rau ntau cov txiaj ntsig:
Txhim kho cov dej dej: los ntawm kev khaws cia dej, HPMC kom tau tias ntau cov dej muaj rau cov txheej txheem hydration, ua rau muaj kev txhim kho xis mas zoo dua thiab muaj zog kev txhim kho.
Txo los ntshav thiab cais cov dej rov qab pab nyob rau hauv kev tiv thaiv dej (sib cais ntawm cov khoom siv) thiab sib cais ntawm cov grout, ua kom muaj kev sib xyaw ua ke thiab ruaj khov.
3. Kev ua haujlwm thiab daim ntawv thov ua tau zoo
HPMC txhim kho kev ua haujlwm ntawm cov txiv maas-raws li guts, ua rau lawv yooj yim dua, twj tso kua mis, thiab thov. Qhov no yog qhov tshwj xeeb tshaj plaws hauv kev tsim txom qhov chaw uas ua tau zoo ntawm daim ntawv thov tuaj yeem cuam tshuam cov sijhawm ua haujlwm tag nrho thiab kev ua tau zoo.
Yooj yim ntawm kev sib xyaw: HPMC-Hloov Grouts yog qhov yooj yim dua los sib tov, ua rau muaj cov khoom sib xyaw ntau homogogeneous yam tsis muaj clumps lossis tsis sib xws faib khoom.
Tso tshuaj tau zoo: Cov kev txhim kho viscosity thiab thixotropic cov khoom lag luam smoother cocks los ntawm hoses thiab kav dej, txo qhov kev pheej hmoo ntawm kev thaiv thiab khoom hnav.
Daim ntawv thov tswj: Enhancored workamility tso cai rau kev tswj tau zoo dua thaum daim ntawv thov, ua kom tiav cov grout fows thiab cov kab ke kom tiav thiab ua kom zoo rau lub substrate.
4. Adhesion thiab Tsevneeg
HPMC txhim kho cov nplaum ntawm cov nplaum ntawm cov cement-raws guts. Qhov no yog qhov tseem ceeb rau kom ntseeg tau tias cov kev cog lus grout zoo rau cov chaw nws tau thov rau, txawm hais tias nws yuav nyob rau hauv cov txheej txheem kev txhim kho, anchoring, lossis cov vuas vuas teeb tsa.
Ua kom muaj zog ntxiv dag zog: ntxiv rau HPMC txhim kho cov khoom nplaum ntawm cov grout, uas ua rau muaj zog sib raug zoo ntawm cov grout thiab substrate.
Enhanced durability: txhim kho cov nplaum uas ua rau muaj kev tsim kho txhua yam thiab ntev ntawm kev tsim kho, raws li cov grout yog tsis tshua muaj kev cuam tshuam lossis degrade dhau sijhawm.
5. Tawg tsis taus thiab ruaj khov
Lub koom haum ntawm HPMC hauv cov txiv maas raws li cov khoom noj kuj tseem ua tau cov khoom siv tiv thaiv kom tawg thiab txhim kho nws lub sijhawm ntev. Qhov no ua tiav los ntawm cov txheej txheem hauv qab no:
Shrinkage txo: HPMC pab rau txo cov shrinkage ntawm grout raws li nws kho. Shrinkage yog ib qho laj thawj ntawm cov khoom tawg hauv cov khoom siv casent, thiab los ntawm kev txo qis nws, HPMC ua rau muaj kev ncaj ncees ntawm cov qauv.
Kev Txhim Kho Kev Yooj Yim: Cov polymeric ntawm HPMC uas muaj kev hloov zuj zus mus rau cov grout, cia nws kom zoo dua ua kom muaj cov cua sov thiab tshuab ntxhov siab yam tsis muaj kev tawg.
6. Ib puag ncig thiab nyiaj txiag pab nyiaj
Siv hpmc hauv cov paj ntaub ntawv cement-raws li tseem tuaj yeem muab cov txiaj ntsig ib puag ncig thiab kev lag luam zoo. Txhim kho kev ua haujlwm ua haujlwm thiab txo cov khib nyiab ua rau ntau cov ntaub ntawv thiab kev ua haujlwm.
Cov khoom siv tau zoo: Cov khoom txuag tau muab los ntawm HPMC txhais tau tias cov khoom tsawg yuav xav tau kom ua tiav qhov kev xav tau, txo cov khoom siv tag nrho.
Kev txo qis thiab kev txij nkawm: kev txhim kho durabilation thiab kev ua tau zoo ntawm HPMC-hloov cov grouts ua rau kev kho dua tshiab thiab txij nkawm dhau lub neej ntawm cov qauv ntawm cov qauv, uas ua rau kev txuag nyiaj ntev.
Qhov sib ntxiv ntawm hydroxypropyl methylcellose (HPMC) rau cov txiv maas-raws li gutscing plays ib tug multifaceted lub luag haujlwm hauv kev txhim kho lawv cov kev ua tau zoo thiab ua haujlwm. Los ntawm kev kho cov khoom siv hluav taws xob, txhim kho cov dej ua haujlwm, ua kom muaj zog ntxiv thiab ua kom muaj zog ntxiv thiab ua kom muaj zog ua kom tau raws li qhov xav tau ntawm cov haujlwm tsim kho niaj hnub no. Ntxiv mus, cov txiaj ntsig ib puag ncig thiab nyiaj txiag hauv qab qhov tseem ceeb ntawm HPMC ua tus muaj txiaj ntsig ntxiv hauv kev tsim kho. Raws li cov kev tsim kho cov tswv yim thiab cov khoom siv txuas ntxiv mus evolve, lub luag hauj lwm ntawm kev ua kom zoo nkauj kom ua tiav kom ua tiav cov txiaj ntsig zoo, ruaj khov, thiab cov txiaj ntsig zoo thiab ua kom tau zoo.
Lub Sijhawm Post: Feb-18-2025