1. Ntxiv methylcellulose rau cov cement tuaj yeem muaj kev cuam tshuam loj rau nws cov khoom siv kho tshuab. Methylcellulose yog ib qho cellulose derivative uas feem ntau siv los ua cov thickener, stabilizer, thiab dej-retaining tus neeg sawv cev hauv ntau yam lag luam, suav nrog kev tsim kho. Thaum ntxiv rau cov cementitious sib tov, methylcellulose cuam tshuam rau ntau yam khoom tseem ceeb xws li lub zog, kev ua haujlwm, kev teeb tsa lub sijhawm thiab kav ntev.
2. Ib lub luag haujlwm tseem ceeb ntawm methylcellulose admixture yog nws cov txiaj ntsig ntawm kev ua haujlwm ntawm cov cement sib tov. Methylcellulose ua raws li cov dej khaws cia, uas txhais tau tias nws pab tiv thaiv cov dej hauv qhov sib tov los ntawm evaporating. Qhov no nyob rau hauv lem txhim khu kev ua hauj lwm ntawm cov cement, ua kom nws yooj yim rau sib tov, qhov chaw thiab tiav. Kev txhim kho kev ua haujlwm tau zoo tshwj xeeb hauv kev tsim cov ntawv thov uas qhov kev tso kawm thiab kev txiav kom zoo yog qhov tseem ceeb rau kev ua tiav qhov kev xav tau ntawm cov qauv kev ntseeg siab thiab kev zoo nkauj.
3. Qhov sib ntxiv ntawm methylcellulose kuj tseem cuam tshuam rau lub sijhawm teem ntawm cov cement. Lub sijhawm teem sijhawm yog lub sijhawm nws siv rau cov cement kom tawv thiab txhim kho nws lub zog thawj zaug. Methylcellulose tuaj yeem txuas ntxiv lub sijhawm teeb tsa, tso cai rau kev hloov pauv ntau dua hauv kev thov thiab hloov kho thaum tsim kho. Qhov no yog qhov muaj txiaj ntsig tshwj xeeb yog qhov yuav tsum tau teem sijhawm ntev dua, xws li ntawm kev tsim kho loj lossis hauv huab cua kub qhov chaw teeb tsa sai tuaj yeem tsim teeb meem.
4. Methylcellulose pab txhim kho lub zog compressive ntawm cov cement. Compressive zog yog cov cuab yeej tseem ceeb uas ntsuas cov khoom muaj peev xwm tiv taus axial loads yam tsis muaj kev sib tsoo. Cov kev tshawb fawb tau pom tias ntxiv methylcellulose tuaj yeem txhim kho lub zog compressive ntawm cov ntaub ntawv cement. Qhov kev txhim kho no yog los ntawm kev txhim kho cov cement particle dispersion thiab txo cov voids hauv cov qauv.
5. Ntxiv rau lub zog compressive, qhov sib ntxiv ntawm methylcellulose kuj tseem muaj qhov cuam tshuam zoo rau lub zog flexural ntawm cov cement. Flexural zog yog qhov tseem ceeb hauv kev siv cov ntaub ntawv uas raug khoov lossis tensile quab yuam. Methylcellulose pab ua kom muaj kev sib faib ntau dua ntawm cov khoom thiab ntxiv dag zog rau cov cementitious matrix, yog li ua kom muaj zog flexural.
6. Lub durability ntawm cov ntaub ntawv cement yog lwm qhov cuam tshuam los ntawm kev sib ntxiv ntawm methylcellulose. Durability muaj xws li tsis kam mus rau ntau yam ib puag ncig, xws li khov-thaw cycles, tshuaj tua kab mob, thiab hnav. Methylcellulose tuaj yeem txhim kho qhov ua haujlwm ntev ntawm cov cement los ntawm kev txhim kho tag nrho cov microstructure thiab txo cov permeability ntawm cov khoom, yog li txo qhov ingress ntawm cov khoom tsis zoo.
7. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov ua tau zoo ntawm methylcellulose ua cov cement admixture yog nyob ntawm ntau yam, nrog rau hom thiab tus nqi ntawm methylcellulose, cov cement formulation, thiab daim ntawv thov. Yog li ntawd, ua tib zoo xav thiab sim yuav tsum tau ua kom zoo dua qhov ntau npaum thiab xyuas kom muaj kev sib raug zoo nrog lwm cov khoom ntawm cov cement sib tov.
Qhov sib ntxiv ntawm methylcellulose rau cov cement tuaj yeem muaj ntau yam txiaj ntsig ntawm nws cov khoom siv kho tshuab, suav nrog kev ua haujlwm tau zoo, nce lub sijhawm teem, txhim kho compressive thiab flexural zog, thiab ua kom muaj zog ntxiv. Cov kev txhim kho no ua rau methylcellulose muaj txiaj ntsig zoo hauv kev tsim kho kev lag luam, muab cov engineers thiab cov neeg tsim kho kom yooj yim dua thiab tswj cov khoom ntawm cov khoom cementitious.
Post lub sij hawm: Jan-18-2024