HPMC Rau Concrete Admixture

Hydroxypropyl Methylcellulose (HPMC) yog cov khoom siv dav siv hauv cov khoom sib xyaw ua ke vim nws cov khoom siv rheological, dej tuav lub peev xwm, thiab muaj peev xwm txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm cov pob zeb sib xyaw. Nov yog yuav ua li cas HPMC siv hauv cov khoom sib xyaw ua ke:

1. Kev tuav dej: HPMC muaj cov khoom tuav dej zoo, txhais tau tias nws tuaj yeem tuav dej hauv cov pob zeb sib tov. Qhov no yuav pab tiv thaiv kom tsis txhob poob dej sai, tshwj xeeb tshaj yog nyob rau hauv kub los yog cua txias, tso cai rau kom zoo dua hydration ntawm cement hais thiab txhim kho lub zog thiab durability ntawm cov pob zeb.
2. Kev Txhim Kho Kev Ua Haujlwm: HPMC ua raws li kev hloov kho rheology, txhim kho kev ua haujlwm thiab sib xws ntawm cov pob zeb sib xyaw. Nws pab txo cov viscosity ntawm qhov sib tov, ua kom yooj yim rau cov twj tso kua mis, qhov chaw, thiab ua tiav. Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau tus kheej-leveling pob zeb, pob zeb siv, thiab cov ntawv thov uas xav tau kev ua haujlwm siab.
3. Txhim kho Cohesion thiab Adhesion: HPMC txhim kho cov cohesion thiab adhesion zog ntawm cov pob zeb, ua rau kev sib raug zoo ntawm cov khoom thiab txhim kho cov khoom ntawm cov pob zeb tawv tawv. Qhov no ua rau txo qis kev sib cais thiab los ntshav, nrog rau kev txhim kho saum npoo thiab zoo li qub.
4. Tswj Lub Sijhawm Teeb Meem: Los ntawm kev tswj cov dej ntawm cov cement, HPMC tuaj yeem pab kho lub sijhawm teem sijhawm ntawm cov pob zeb sib xyaw. Qhov no yog qhov tseem ceeb hauv cov xwm txheej uas yuav tsum tau ncua sij hawm los yog ncua sij hawm ua hauj lwm, tso cai rau kev tswj kom zoo dua qhov kev tso kawm thiab ua tiav ntawm cov pob zeb.
5. Kev sib raug zoo nrog lwm cov khoom sib xyaw: HPMC yog sib xws nrog ntau yam ntawm lwm cov khoom sib xyaw ua ke, suav nrog cov neeg ua haujlwm cua nkag, cov yas, cov khoom siv superplasticizers, thiab cov txheej txheem retarders. Nws tuaj yeem siv ua ke nrog cov tshuaj ntxiv no kom ua tiav cov kev xav tau tshwj xeeb thiab kho cov khoom ntawm cov pob zeb kom tau raws li qhov xav tau ntawm qhov project.
6. Kev Siv thiab Daim Ntawv Thov: Qhov ntau npaum li cas ntawm HPMC hauv cov khoom sib xyaw ua ke feem ntau yog li ntawm 0.1% mus rau 0.5% los ntawm qhov hnyav ntawm cov ntaub ntawv cementitious, nyob ntawm seb qhov kev ua tau zoo thiab cov kev xav tau ntawm cov pob zeb sib xyaw. Nws feem ntau yog ntxiv rau cov pob zeb sib tov thaum lub sij hawm sib tov, xws li cov hmoov qhuav los yog ua cov tshuaj tov ua ntej.

HPMC yog ib qho tshuaj ntxiv uas muaj ntau yam txiaj ntsig hauv cov khoom sib xyaw ua ke, suav nrog kev txhim kho kev ua haujlwm, dej tuav, cohesion, adhesion, thiab tswj lub sijhawm. Nws txoj kev siv tuaj yeem ua rau kev tsim cov pob zeb zoo sib xyaw nrog kev ua tau zoo thiab ua haujlwm ntev.