HydroxyPropyyl methylcellulose tuaj yeem txhim kho cov kev rho tawm tsis kam ntawm cov cement cug.
HydroxyPropyyl methylcellulose yog dej-soluble polymer compound. Nws feem ntau nce qhov sib xws ntawm kev sib xyaw los ntawm kev nce viscosity ntawm cov dej sib tov. Nws tuaj yeem yog yaj hauv dej los ua cov kua apcous. Nws yog hydrophilic polymer-cov ntaub ntawv. Los ntawm kev sim, peb tuaj yeem nrhiav tau tias thaum cov nqi ntawm superplasticizer yuav txo cov kev tshem tawm ntawm cov cemently sib xyaw. Vim li cas cov xwm txheej ntawd yuav tshwm sim? Qhov no yog vim hais tias Naphthalene-raws li cov dej muaj txiaj ntsig zoo ua rau dej reducer yog qhov surfactant. Thaum cov dej reducer yog siv hauv cov xis qab zib, nws yuav raug taw qhia rau saum npoo ntawm cov xis kawm tau ua rau sab qabent hais tawm. Qhov hluav taws xob hluav taws xob no ua rau cov cai xis mas ua cov qauv flocculation ntawm cov qauv hloov, thiab cov dej qhwv hauv cov qauv yog tso tawm, uas yuav ua rau ib feem ntawm cov cement. Nyob rau tib lub sijhawm, nws tau pom tias nrog kev nce ntawm cov ntsiab lus ntawm hydroxyprropylulose, lub dispersion tsis zoo los ua kom zoo dua thiab zoo dua.
Lub zog cov yam ntxwv ntawm cov pob zeb ua:
Nyob rau hauv kev ntsuas choj dav dav hauv lub hauv paus pib engineering, tus qauv tsim ua kom muaj zog yog C25. Raws li kev ntsuas pib, qhov ntau ntawm cov cement yog 400kg, tus nqi ntawm cov dej xis yog 0.42, thiab cov xuab zeb zoo li cas yog 5042, cov xuab zeb zoo li ntawm cov khoom siv hluav taws xob yog li 2542, thiab cov xuab zeb txoj kev ywj pheej yog 0.42, thiab cov xuab zeb txoj kev ywj pheej yog li 2542, thiab cov xuab zeb txoj kev ywj pheej yog 0.42, thiab cov xuab zeb txoj kev hloov pauv dej yog 8% ntawm cov pa taws ua kom haum. Cov pob zeb ua rau saum huab cua muaj lub zog nruab nrab ntawm 42.6MPA rau 28 hnub, thiab under qhov siab ntawm 60mm rau 28 hnub muaj lub zog nruab nrab ntawm 36.4MPA. Lub zog piv ntawm kev sib sau hauv huab cua yog 84.8%, thiab cov nyhuv yog qhov tseem ceeb.
1. Qhov kev sib ntxiv ntawm hydroxypropyl methylculose muaj qhov pom tseeb retarding cuam tshuam rau ntawm lub tshuaj khib. Nrog rau kev nce ntawm cov ntsiab lus ntawm hydroxypropyl fiber ntau, lub sij hawm teeb lub sij hawm ntawm cug cug yog txuas ntxiv. Nyob rau hauv cov ntaub ntawv ntawm tib cov cellulose cov ntsiab lus, neeg nplua nuj tsim underwater yuav siv sijhawm ntev dua cov huab cua. Cov yam ntxwv no tau txais txiaj ntsig rau hauv qab dej ua ke twj tso kua mis.
2. Cov ntsiab lus ntawm hydroxypropy methyl fiber ntau thiab cov dej xav tau txo ua ntej thiab tom qab ntawd nce obviously.
3. Cov xis ntshiab cug cov ceg sib xyaw nrog HPMC muaj cov khoom siv sib txuas zoo thiab yuav luag tsis muaj ntshav.
4. Ntxiv hydroxypropyl methylcellulose underwater tsis-dispersible qhob admixture, kev tswj hwm cov pestage muaj txiaj ntsig zoo rau lub zog. Qhov kev sim ua kom sim qhia tau hais tias lub zog piv ntawm cov khoom siv hauv cov dej ua ke thiab ua vaj tse yog 84.8%, thiab cov nyhuv tseem ceeb.
5. Qhov txuam nrog tus neeg sawv cev dej kom zoo dua qhov teeb meem ntawm kev ua tshuaj khib nyiab ntawm cov tshuaj khib nyiab, tab sis tsis yog cov tshuaj khib nyiab hauv qab no yuav raug txo kom tsawg.
6. Muaj me ntsis sib txawv hauv cov qauv hloov pauv cov hnoos qeev sib xyaw nrog cov tshuaj tsw qab thiab cov qauv ntawm cov cement thiab poured nyob rau hauv huab cua tsis txawv. Cov quav dev tsim nyob rau hauv dej rau 28 hnub yog me ntsis crisp. Qhov laj thawj tseem ceeb yog qhov ntxiv ntawm cellulose tau txo tus poob thiab kev faib rau hauv dej, tab sis nws tseem yuav txo qhov kev sib txuas ntawm pob zeb xas. Hauv txoj haujlwm, hauv qab cov xwm txheej ntawm kev ua kom muaj kev cuam tshuam ntawm cov nyhuv tsis-dispersion hauv qab dej, cov tshuaj ntawm cellulose yuav tsum tau txo kom ntau li ntau tau.
Lub Sijhawm Post: Tsib-26-2023