Umhla wokuPoswa:11,Disemba,2023
Iiselizisetyenziswa kakhulu kwizinto ezisekelwe kwisamente, ngakumbi kwiidaka ezomileyo, ngenxa yokugcinwa kwamanzi okugqwesileyo kunye nemiphumo yokuqina.Ngoko ke, iipropati kunye nokwakheka kwendlelai-cellulose ether izixhobo ezilungisiweyo zesamente kunye nentsebenziswano phakathii-cellulose ether kunye nodaka lwesamente ngokuthe ngcembe luye lwaba lugqaliselo kwinkalo yezixhobo zokwakha kunye nobunjineli kwiminyaka yakutshanje.Iziphumo ezininzi zophando ziphunyeziwe.Ukudibanisa inkqubela yophando ekhaya nakwamanye amazwe, kusekho ezi ngxaki zilandelayo kuphando kunye nokusetyenziswai-cellulose ether imathiriyeli esekwe kwisamente elungisiweyo:
1.Zininzi iintlobo zeiiselulosi.Nditshoiiselulosi ezisetyenziswa kwizinto ezisekelwe kwisamente zahlulwe zaba ziindidi ezininzi ezifana ne-HEC, HEMC kunye ne-HPMC ngenxa yeqondo labo lokuthatha indawo.Uhlobo olufanayo lweiiselulosizineeyantlukwano ezininzi kulwakhiwo lwemolekyuli, ubunzima bemolekyuli, iqondo lokuthatha indawo okanye umxholo obambeleyo.Okwangoku, uphando oluninzi ekhaya nakwamanye amazwe lujolise kwelinye okanye ezininziiiselulosi.Ukhetho lwei-cellulose ether kuthintelwe kwiinkalo ezahlukeneyo zesicelo sabo.Iimpawu zesakhiwo seemolekyuli zeiiselulosi aziboniswa, kwaye ukumelwa kwazo akumelanga.Isiphelo sisiphumo esingenakuthintelwa "sokutshintshwa kwenxenye", kwaye kukho ukuchasana kunye neengxabano phakathi kweziphumo zovavanyo.Ngoko ke, kuyimfuneko ukufunda ngokucwangcisiweyo ulwahlulo kunye nezakhiwo zesakhiwo kunye neendlela zeentlobo ezahlukeneyo zei-cellulose ether izixhobo gelling ezilungisiweyo.
2.Uncwadi olukhoyo lufunde ifuthe leiiselulosi kwiipropathi ezahlukeneyo zemathiriyeli yesamente, kwaye yenze uhlalutyo oluthile lwendlela yokwakheka kwayo, kodwa ayiphumelelanga ukufumanisa ubudlelwane phakathi kolwakhiwo lwemolekyuli yeiiselulosi kunye neempawu zodaka lwesamente olulungisiweyo.rhoqo, kwaye kukho umahluko ocacileyo kwiindlela zabo.Phakathii-cellulose ether-izixhobo ezisekwe kwisamente ezilungisiweyo, kukho izifundo ezimbalwa kwizinto ezinezakhiwo ezahlukeneyo zeemolekyuli, ezingenako ukuchaza ngokucacileyo indlela yokwakheka kweempawu ezahlukeneyo.i-cellulose ether-izinto ezilungisiweyo zesamente..Nangona ezinye iincwadi zakufumanisa okoiiselulosi kunye nezakhiwo ezahlukeneyo zeemolekyuli zineempembelelo ezahlukeneyo kwi-hydration ye-samente, izizathu ezisisiseko azikacacisi ngakumbi.
3.Indlela yempembelelo yei-cellulose ether kwi-cement hydration kinetics kusaza kuphononongwa ngakumbi.Okwangoku, malunga nokulibaziseka kwe-hydration mechanism yei-cellulose ether, nangona i-adsorption ithathwa njengeyona nto ibangela ukulibaziseka kwe-hydrationi-cellulose ether, kufumaniseka ukuba amandla adsorption anamandla phakathi kweemveliso ze-hydration kunyei-cellulose ether, kokukhona kulibaziseka ngakumbi ukugalelwa kwesamente.I-adsorption mechanism phakathiiiselulosi kunye neemveliso ze-cement hydration, kunye nezizathu zezakhono ezahlukeneyo ze-adsorption ezahlukeneyoiiselulosi kunye neemveliso zesamente zehydration, azikaphononongwa ngakumbi.
4.Uncwadi olukhoyo lubonisa ukubaiiselulosi inokuchaphazela kakhulu ubume bepore bezinto ezisekelwe kwisamente.Iiseli zikwakholelwa ukuba zisebenza phezu komhlaba kwaye zinefuthe lokungenisa umoya kwi-slurries entsha yesamente, ngokwenjenjalo zandisa ubunzulu boludaka lwesamente oluqinileyo.Nangona kunjalo, impembelelo yeiiselulosi kwindlela eqhelekileyo kunye nokwakheka kwendlela yokuhanjiswa kobungakanani bepore yesamente ayifane ixoxwe.
5. Iimpawu zeRheological ziyinkalo ebalulekileyo yokusetyenziswa kweiiselulosi kwizinto ezisekwe kwisamente.Ngelishwa, kukho izifundo ezimbalwa kwiipropati ze-rheologicali-cellulose ether udaka lwesamente olulungisiweyo ekhaya nakwamanye amazwe.
Ixesha lokuposa: Dec-11-2023