Cellulose etherzai tsawaita lokacin saita manna siminti ko ragar turmi, zai jinkirta motsin haƙo siminti, wanda ke da amfani wajen inganta lokacin aiki na kayan tushe na siminti, inganta daidaito da faɗuwar siminti bayan asara, amma kuma yana iya jinkirta ci gaban ginin, musamman a yanayin yanayi mai ƙarancin zafi don amfani da turmi da siminti.
Gabaɗaya, yawan sinadarin cellulose ether, haka nan tsawon lokacin saita siminti da turmi, da kuma yadda ake nuna jinkirin danshi. Cellulose ether na iya jinkirta danshi na mafi mahimmancin matakan ma'adinai na clinker tricalcium aluminate (C3A) da tricalcium silicate (C3S) a cikin siminti, amma tasirin da ke kan motsin hydration ɗinsu ba iri ɗaya bane. Cellulose ether galibi yana rage yawan amsawar C3S a cikin matakin hanzari, yayin da ga tsarin C3A-Caso4, galibi yana tsawaita lokacin da aka shigar.
Wasu gwaje-gwaje sun nuna cewa cellulose ether na iya hana narkewar C3A da C3S, jinkirta crystallization na calcium aluminate mai ruwa da kuma calcium hydroxide, da kuma rage nucleation da kuma saurin girma na CSH a saman barbashi na C3S, amma ba shi da wani tasiri sosai ga lu'ulu'u na ettringite. Weyer da abokan aikinsa sun gano cewa matakin maye gurbin DS shine babban abin da ke shafar hydration na siminti, kuma ƙaramin DS shine, mafi bayyanannen lokacin da aka jinkirta hydration na siminti. Dangane da tsarin cellulose ether jinkirin hydration na siminti.
Sliva da abokan aikinsa sun yi imanin cewa cellulose ether yana ƙara dankowar ruwan rami kuma yana hana saurin motsin ion, don haka yana jinkirta ruwan siminti. Duk da haka, Pourchez da abokan aikinsa sun gano cewa dangantakar da ke tsakanin cellulose ether da jinkirin ruwan siminti da dankowar ruwan siminti ba a bayyane take ba. Schmitz da abokan aikinsa sun gano cewa dankowar cellulose ether ba ta da wani tasiri a kan motsin ruwan siminti.
Pourchez ya kuma gano cewa cellulose ether yana da ƙarfi sosai a ƙarƙashin yanayin alkaline kuma jinkirin danshi na simintinsa ba za a iya danganta shi da ruɓewar bacellulose etherShafawa na iya zama ainihin dalilin da yasa cellulose ether ke jinkirta shaƙar siminti, za a haɗa ƙarin abubuwa da yawa na halitta zuwa ƙwayoyin siminti da samfuran shaƙar, yana hana wargaza ƙwayoyin siminti da kuma samar da lu'ulu'u na samfuran shaƙar, don haka yana jinkirta shaƙar siminti da danshi. Pourchcz da abokan aikinsa sun gano cewa ƙarfin shaƙar siminti da cellulose ether da ƙarfi, haka nan jinkirin ke bayyana.
Gabaɗaya ana yarda cewa ƙwayoyin cellulose ether galibi suna shaye-shaye akan samfuran ruwa kuma ba kasafai ake shaye-shaye a matakin ma'adinai na asali na clinker ba.
Lokacin Saƙo: Afrilu-28-2024