I-cellulose ether inomphumela othile wokulibazisa ku-mortar. Ngokwanda komthamo we-cellulose ether, isikhathi sokubeka se-mortar siyanda. Umphumela wokulibazisa we-cellulose ether ku-cement paste uncike kakhulu ezingeni lokushintshana kweqembu le-alkyl, kuyilapho kungenalo lutho oluphathelene nesisindo salo sama-molecule.
Uma izinga lokufakwa esikhundleni se-alkyl lincane, okuqukethwe kwe-hydroxyl kukhulu, futhi umphumela wokulibazisa ubonakala kakhulu. Futhi uma umthamo we-cellulose ether uphakeme, umphumela wokulibazisa wengqimba yefilimu eyinkimbinkimbi ubonakala kakhulu ekufakweni kwe-samente ekuqaleni, ngakho-ke umphumela wokulibazisa nawo ubonakala kakhulu.
Amandla angenye yezinkomba ezibalulekile zokuhlola umphumela wokwelapha wezinto ezisekelwe kusimende engxubeni. Lapho umthamo we-cellulose ether ukhuphuka, amandla okucindezela kanye namandla okuguquguquka kwesimende kuzoncipha. Amandla okubopha okuqinile kwesimende esixutshwe ne-cellulose ether ayathuthuka; Amandla okuguquguquka nokucindezela kwesimende sesimende ayancishiswa, futhi lapho umthamo ukhula, amandla ayancipha;
Ngemva kokuxuba i-hydroxypropyl methyl cellulose ether, ngokwanda komthamo, amandla okuguquguquka kodaka lwesimende aqala ukwanda bese ehla, futhi amandla okucindezela ancipha kancane kancane. Umthamo ofanele kufanele ulawulwe ku-0.1%.
I-Cellulose ether inethonya elikhulu ekusebenzeni kokubopha kwe-mortar. I-Cellulose ether yakha ifilimu ye-polymer enomphumela wokuvala phakathi kwezinhlayiya ze-samente hydration ohlelweni lwesigaba soketshezi, okukhuthaza amanzi amaningi kwifilimu ye-polymer ngaphandle kwezinhlayiya ze-samente, okusiza ekufakweni kwamanzi okuphelele kwe-samente, ngaleyo ndlela kuthuthukiswe amandla e-bond ye-paste ngemva kokuqina.
Ngesikhathi esifanayo, inani elifanele le-cellulose ether lithuthukisa ukuqina kanye nokuguquguquka kwe-mortar, kunciphisa ukuqina kwendawo yokuguquka phakathi kwe-mortar kanye ne-substrate interface, futhi kunciphisa ikhono lokushelela phakathi kwe-interfaces. Ngezinga elithile, umphumela wokubopha phakathi kwe-mortar kanye ne-substrate uyathuthukiswa.
Ngaphezu kwalokho, ngenxa yokuba khona kwe-cellulose ether ku-cement paste, kwakhiwa indawo ekhethekile yokuguquka kwesixhumi kanye nesendlalelo sesixhumi phakathi kwezinhlayiya ze-mortar kanye nomkhiqizo we-hydration. Le sendlalelo sesixhumi senza indawo yokuguquka kwesixhumi ibe lula futhi ingaqini. Ngakho-ke, yenza i-mortar ibe namandla aqinile esibopho.
Isikhathi sokuthunyelwe: Juni-02-2023