Udaka oluzilinganisa ngokwalo lungathembela esisindweni salo ukwenza isisekelo esiyisicaba, esibushelelezi nesiqinile ku-substrate yokubeka noma yokuhlanganisa ezinye izinto.Ingakwazi futhi ukwenza ukwakhiwa okuphumelelayo endaweni enkulu.I-fluidity ephezulu iyisici esibaluleke kakhulu sodaka lokuzilinganisa.;Ngaphezu kwalokho, kufanele futhi ibe nokugcinwa kwamanzi athile kanye namandla okubopha, ingakhiqizi ukuhlukaniswa kwamanzi, futhi ibe nezici zokushisa ukushisa nokukhuphuka okuphansi kwezinga lokushisa.
Ngokuvamile, udaka lokuzilinganisa ludinga uketshezi oluhle.I-cellulose etheriyisengezo esikhulu sodaka oseluvele luxubile.Nakuba inani elingeziwe liphansi kakhulu, lingathuthukisa kakhulu ukusebenza kodaka.Ingathuthukisa ukungaguquguquki, ukusebenza kokusebenza, kanye nezakhiwo ze-Adhesion kanye nezindawo zokugcina amanzi, njll. Idlala indima ebalulekile emkhakheni wodaka oluxutshwe ngomumo.
Uketshezi
I-cellulose etherkunomthelela obalulekile ekugcinweni kwamanzi, ukungaguquguquki, nokusebenza kokwakhiwa kodaka oluzilinganisa ngokwalo.Ikakhulukazi udaka lokuzilinganisa, uketshezi lungenye yezinkomba eziyinhloko zokuhlola ukusebenza kokuzilinganisa.Ngokwesisekelo sokuqinisekisa ukubunjwa okujwayelekile kodaka, ukugcwala kodaka kungalungiswa ngokushintsha inani le-cellulose ether.Kodwa-ke, umthamo ophezulu kakhulu uzonciphisa ukugcwala kodaka, ngakho-ke umthamo we-cellulose ether kufanele ulawulwe ngaphakathi kwebanga elinengqondo.
Ukugcinwa kwamanzi
Ukugcinwa kwamanzi odaka kuyinkomba ebalulekile yokukala ukuzinza kwezingxenye zangaphakathi zodaka olusha lukasimende.Ukuze ufeze ngokugcwele ukusabela kwe-hydration yezinto zejeli, inani elifanele le-cellulose ether lingagcina umswakama odongeni isikhathi eside.Ngokuvamile, izinga lokugcinwa kwamanzi e-slurry likhuphuka ngokunyuka kokuqukethwe kwe-cellulose ether.Umsebenzi wokugcina amanzi we-cellulose ether ungavimbela i-substrate ekumunceni amanzi amaningi ngokushesha futhi ivimbele ukuhwamuka kwamanzi, ngaleyo ndlela kuqinisekiswe ukuthi indawo yodaka ihlinzeka ngamanzi anele okufakwa kukasimende.Ngaphezu kwalokho, i-viscosity ye-cellulose ether nayo inethonya elikhulu ekugcinweni kwamanzi odaka.Ukuphakama kwe-viscosity, kungcono ukugcina amanzi.Ama-cellulose ether ane-viscosity evamile engu-400 mpa.
Isikhathi se-coagulation
I-cellulose etherinomphumela othile wokuvinjelwa odakeni.Njengoba okuqukethwe kwe-cellulose ether kwanda, isikhathi sokusetha sodaka siyakhula.Umthelela obambezelekayo we-cellulose ether ku-slurry usimende ikakhulukazi uncike ezingeni lokushintshanisa amaqembu e-alkyl futhi unobudlelwane obuncane nesisindo sawo samangqamuzana.Uma i-alkyl substitution degree incane, i-hydroxyl izoba nkulu, futhi umphumela wokuhlehlisa osobala kakhulu.Futhi ukuphakama kokuqukethwe kwe-cellulose ether, kusobala kakhulu ungqimba lwefilimu eyinkimbinkimbi ekubambezeleni ukugeleza kokuqala kukasimende, ngakho-ke, umphumela wokubambezeleka uba sobala kakhulu.
Amandla e-Flexural namandla acindezelayo
Amandla angenye yezinkomba zokuhlola ezibalulekile zomphumela wokuqiniswa kwezinto zikasimende ezisekelwe kusimende kungxube.Njengoba okuqukethwe kwe-cellulose ether kwanda, amandla okucindezela namandla okuguquguquka kodaka kuzokwehla.Idinga ukulawulwa ngaphakathi kwebanga elithile eliphusile.
Amandla okubopha
I-Cellulose ether inethonya elikhulu kuzakhiwo zokubopha udaka.I-Cellulose ether yakha ifilimu ye-polymer enomphumela wokuvala phakathi kwezinhlayiya ze-cement hydration ohlelweni lwesigaba se-liquid, okukhuthaza amanzi amaningi efilimu ye-polymer ngaphandle kwezinhlayiya zikasimende, okuvumela ukugeleza okuphelele kukasimende, ngaleyo ndlela kuthuthukise amandla e-Bond. ngemuva kokuqina kwe-slurry.Ngesikhathi esifanayo, inani elifanele le-cellulose ether lithuthukisa ipulasitiki kanye nokuguquguquka kodaka, linciphisa ukuqina kwendawo yoshintsho phakathi kodaka nezinto eziyisisekelo, futhi linciphisa ikhono lokushelela phakathi kwezixhumanisi.Ngokwezinga elithile, umthelela wokuhlanganisa phakathi kodaka nezinto eziyisisekelo uyathuthukiswa.Ngaphezu kwalokho, ngenxa yokuba khona kwe-cellulose ether ku-slurry kasimende, indawo ekhethekile yokuguqula isikhombimsebenzisi kanye nesendlalelo esibonakalayo kwakhiwa phakathi kwezinhlayiya zodaka kanye nemikhiqizo ye-hydration.Lesi sendlalelo esibonakalayo senza indawo yokushintsha isixhumi esibonakalayo ibe lula futhi ibe namandla aphansi.Ngakho-ke, , ukuze udaka lube namandla okubopha okuqinile.
Isikhathi sokuthumela: Feb-02-2024