Methyl Hydroxyethyl Cellulose (MHEC) yog cov thickener thiab nplaum feem ntau siv hauv cov khoom siv hauv tsev. Nws cov lus qhia muaj qhov cuam tshuam loj rau cov khoom ntawm cov cement matrix.
1. Txhim kho fluidity thiab workability
Methyl hydroxyethyl cellulose, ua cov thickener, tuaj yeem txhim kho fluidity ntawm cov cement matrix. Nws ua rau cov cement slurry ruaj khov thiab kua dej thaum lub sij hawm tsim kho los ntawm kev ua kom cov viscosity ntawm cov sib tov. Qhov no pab sau cov pwm nyuaj thiab txo qhov tawg thaum lub sij hawm tsim kho. Tsis tas li ntawd, methyl hydroxyethyl cellulose tseem tuaj yeem txhim kho cov dej tuav ntawm cov cement matrix thiab txo qhov tshwm sim los ntshav ntawm cov cement slurry, yog li txhim kho kev tsim kho kom zoo.
2. Txhim kho adhesion
Methyl hydroxyethyl cellulose tuaj yeem txhim kho cov khoom sib txuas ntawm cov cement matrix. Qhov no yog vim nws muaj cov nplaum nplaum zoo heev thiab tuaj yeem ua ke nrog cov dej noo hauv cov cement los ua ib qho colloid nrog muaj zog adhesion. Qhov kev hloov kho no tseem ceeb heev rau kev txhim kho qhov adhesion ntawm cov cement matrix thiab substrate, tshwj xeeb tshaj yog nyob rau hauv phab ntsa plastering, ceramic pobzeb pasting thiab lwm yam kev siv.
3. cuam tshuam lub zog thiab kav ntev
Qhov sib ntxiv ntawm methylhydroxyethylcellulose muaj qee yam cuam tshuam rau lub zog ntawm cov cement matrix. Hauv qee qhov ntau npaum li cas, methylhydroxyethyl cellulose tuaj yeem txhim kho lub zog compressive thiab flexural zog ntawm cov cement matrix. Los ntawm kev txhim kho qhov sib xws thiab kev ruaj ntseg ntawm cov cement paste, nws txo qhov pores thiab cov kab nrib pleb hauv cov cement matrix, yog li txhim kho tag nrho lub zog thiab durability ntawm cov khoom. Txawm li cas los xij, yog tias ntxiv ntau dhau lawm, nws yuav ua rau txo qis hauv kev sib txuas ntawm cov cement thiab aggregate hauv cov cement matrix, yog li cuam tshuam rau nws lub zog kawg.
4. Txhim kho qhov tawg tsis kam ntawm cov cement matrix
Txij li thaum methylhydroxyethylcellulose tuaj yeem txhim kho cov dej tuav ntawm cov cement matrix, nws tuaj yeem txo cov kab nrib pleb los ntawm kev ziab rau qee yam. Qhuav shrinkage ntawm cov cement matrix yog ib qho ntawm cov laj thawj tseem ceeb ntawm cov kab nrib pleb, thiab methylhydroxyethyl cellulose pab txo qhov kev pheej hmoo ntawm cov kab nrib pleb los ntawm ziab shrinkage los ntawm kev txo cov evaporation sai ntawm cov dej.
5. Npuas tswj hauv cov cement matrix
Methyl hydroxyethyl cellulose tuaj yeem tsim cov qauv ua npuas ruaj khov hauv cov cement matrix, uas pab txhim kho cov huab cua encapsulation ntawm cov cement matrix. Cov huab cua npuas tswj cov cuab yeej no ua lub luag haujlwm hauv kev txhim kho cov thermal rwb thaiv tsev ntawm cov cement matrix thiab txo qhov ntom ntawm cov cement matrix. Txawm li cas los xij, ntau cov npuas yuav ua rau cov khoom tsis muaj zog, yog li tus nqi tsim nyog yuav tsum tau ntxiv raws li daim ntawv thov tshwj xeeb.
6. Txhim kho impermeability
Los ntawm kev txhim kho cov dej tuav ntawm cov cement matrix, methylhydroxyethylcellulose tuaj yeem txo cov permeability ntawm cov cement matrix. Qhov no yog ib qho tseem ceeb heev los txhim kho cov impermeability thiab waterproof kev ua tau zoo ntawm cov cement matrix, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov uas yuav tsum tau waterproofing, xws li hauv qab daus, sab nrauv phab ntsa, thiab lwm yam.
Daim ntawv thov ntawm methylhydroxyethyl cellulose nyob rau hauv cov cement matrix tuaj yeem ua rau muaj kev txhim kho ntau yam, suav nrog kev txhim kho fluidity, txhim kho adhesion, txhim kho lub zog, txhim kho kev tawg, tswj cov npuas thiab txhim kho impermeability. Txawm li cas los xij, nws cov kev siv thiab kev faib ua feem yuav tsum tau hloov kho raws li cov kev xav tau tshwj xeeb thiab cov khoom siv kom tau txais txiaj ntsig zoo tshaj plaws. Los ntawm kev tshawb fawb thiab tsim nyog ntxiv thiab npaj, methyl hydroxyethyl cellulose tuaj yeem txhim kho tag nrho cov kev ua tau zoo ntawm cov cement matrix thiab ua tau raws li kev xav tau ntawm engineering sib txawv.
Post lub sij hawm: Aug-09-2024