Iselulosi etheriya kwandisa ixesha lokumisela i-samente intlama okanye umnatha wodaka, ukulibazisa i-cement hydration kinetics, enenzuzo ekuphuculeni ixesha lokusebenza kwezinto ezisisiseko sesamente, ukuphucula ukuhambelana kunye nokudilika kwekhonkrithi emva kokulahlekelwa, kodwa kwakhona kunokulibazisa inkqubela phambili yokwakhiwa, ngakumbi kwiimeko eziphantsi zobushushu obuphantsi bokusetyenziswa kodaka kunye nekhonkrithi.
Ngokubanzi, okukhona uphezulu isiqulatho se-cellulose ether, kokukhona ixesha lokumiselwa kodaka lwesamente nodaka, kwaye kokukhona kucaca ngakumbi ukulibaziseka kwe-hydration dynamics. I-ether ye-cellulose inokulibazisa i-hydration yezona zinto zibalulekileyo ze-clinker mineral phase tricalcium aluminate (C3A) kunye ne-tricalcium silicate (C3S) kwi-samente, kodwa umphumo kwi-kinetics yabo ye-hydration ayifani. I-ether ye-cellulose inciphisa kakhulu izinga lokuphendula kwe-C3S kwisigaba sokukhawulezisa, ngelixa inkqubo ye-C3A-Caso4, ikakhulu yandisa ixesha lokungeniswa.
Uvavanyo olongezelelweyo lubonise ukuba i-cellulose ether inokuthintela ukuchithwa kwe-C3A kunye ne-C3S, ukulibazisa i-crystallization ye-hydrated calcium aluminate kunye ne-calcium hydroxide, kunye nokunciphisa i-nucleation kunye nesantya sokukhula kwe-CSH kumphezulu we-C3S particles, kodwa ibe nefuthe elincinci kwi-crystals ettringite. Weyer et al. yafumanisa ukuba i-degree yokutshintshwa kwe-DS yayiyeyona nto iphambili echaphazela i-cement hydration, kwaye i-DS encinci yayiyiyo, ngokucacileyo ngakumbi ukulibaziseka kwe-cement hydration kwaba. Kumatshini we-cellulose ether ulibazisa ukuhanjiswa kwesamente.
Sliva et al. wayekholelwa ukuba i-cellulose ether yandisa i-viscosity yesisombululo se-pore kwaye ithintele isantya sokuhamba kwe-ion, ngaloo ndlela ilibazisa ukuhanjiswa kwe-samente. Nangona kunjalo, uPourchez et al. yafumanisa ukuba ubudlelwane phakathi kwe-cellulose ether ilibazisekile i-cement hydration kunye ne-cement slurry viscosity yayingabonakali. Schmitz et al. yafumanisa ukuba i-viscosity ye-cellulose ether yayiphantse ingabi nampembelelo kwi-hydration kinetics yesamente.
I-Pourchez iphinde yafumanisa ukuba i-cellulose ether yayizinzile kakhulu phantsi kweemeko ze-alkaline kwaye ukulibaziseka kwayo kwe-samente hydration ayinakubangelwa ukubola kwe-alkaline.i-cellulose ether. I-Adsorption ingaba sesona sizathu sokwenyani se-cellulose ether yokulibaziseka kwe-cement hydration, ezininzi izongezo ze-organic ziya kubhengezwa kwiincinci zesamente kunye neemveliso ze-hydration, zithintele ukuchithwa kweengqungquthela ze-samente kunye ne-crystallization yeemveliso ze-hydration, ngaloo ndlela ukulibazisa i-hydration kunye ne-condensation ye-cement. Pourchcz et al. Ufumanise ukuba okukhona ukomelela komthamo we-adsorption yeemveliso ze-hydration kunye ne-cellulose ether, kokukhona kucaca ngakumbi ukulibaziseka.
Ngokuqhelekileyo kukholelwa ukuba iimolekyuli ze-cellulose ether zithengiswa kakhulu kwiimveliso ze-hydration kwaye kunqabile ukuba zibhengezwe kwinqanaba lokuqala leminerali ye-clinker.
Ixesha lokuposa: Apr-28-2024