Cellulose ether yuav nthuav dav lub sij hawm txhim kho lub sijhawm tsim kho, tab sis kuj yuav ncua kev txhim kho kev txhim kho, tab sis kuj tseem nyob rau hauv cov khoom siv kom xis nyob, tshwj xeeb kuj muaj ib puag ncig ntawm kev siv tshuaj khib thiab pob zeb.
Generally, the higher the content of cellulose ether, the longer the setting time of cement slurry and mortar, and the more obvious the delayed hydration dynamics. Cellulose ether tuaj yeem ncua cov kev hydration ntawm qhov tseem ceeb tshaj plaws hauv chav ua yeeb yaj kiab Cellulose ether tsuas yog txo cov tshuaj tiv thaiv C3s ntawm C3s cov tshuaj tiv thaiv, thaum rau C3A-CASO4 system, nws tsuas yog lub sij hawm prolonging induction.
Cov kev sim ntxiv uas pom tias cellulose ether tuaj yeem cuam tshuam cov kev sib cais ntawm C3A thiab C3S Crystallization, tab sis tau muaj cov nyhuv me me rau ettringite muaju. Weyer li al. pom tias cov degree ntawm chaw hloov chaw yog qhov tseem ceeb uas cuam tshuam cement dej, thiab qhov tseeb dua yog, qhov pom tseeb dua qhov qeeb ntawm txoj kev ntseeg tau. Ntawm lub tshuab ntawm cellulose ether ncua txoj kev cai maj.
SLIVA li al. ntseeg tias cellulose ether nce lub viscosity ntawm pore daws thiab tabkaum ntawm cov kev tawm tsam ion, yog li ncua cov xis txoj cai. Txawm li cas los xij, PourCHEZ li al. pom tias kev sib raug zoo ntawm cellulose ether ncua cement thiab MAAs slurry viscosity tsis pom tseeb. Schmitz li al. Pom tias lub viscosity ntawm cellulose ntawm cellulose ntawm cellulose muaj yuav luag tsis muaj kev cuam tshuam rau ntawm cov cinning kinetics ntawm xis mas.
Pegchez tseem pom tias cellulose ether tau ruaj khov nyob rau hauv Alkaline Illation tsis tuaj yeem yog tus kheej ntawm cellulose ether. Adsorption yuav yog qhov tseeb cellulose ether ncua cov cement, tiv thaiv cov khoom siv hydration, yog li ncua cov dej thiab hws ntawm cov cement. Pegchcz li al. Pom tias qhov muaj zog dua adsorption muaj peev xwm ntawm cov khoom siv dej thiab cellulose ether, ntau pom tseeb qhov qeeb.
Nws yog feem ntau ntseeg hais tias cellulose ither molecules tsuas yog adsorbed ntawm hydration khoom thiab tsis tshua muaj adsorbed ntawm thawj cov chaw ntxhoo ntawm clinker.
Lub Sijhawm Post: Dec-09-2021