Ama-cellulose ethers awuhlobo lwamakhemikhali e-organic polymer aguqulwe ngamakhemikhali avela ku-cellulose yemvelo. Avame ukusetshenziswa ezintweni zokwakha, ikakhulukazi ezintweni ezisekelwe kusimende. Ithonya le-cellulose ether enqubweni yokumunca usimende libonakala kakhulu kulezi zici ezilandelayo: ukusabalala kwezinhlayiya zesimende, ukugcinwa kwamanzi, umphumela wokujiya, kanye nomthelela ekubunjweni nasekuthuthukisweni kwamandla kwemikhiqizo yokumunca usimende.
1. Isingeniso sokumuncwa kwesamente
Inqubo yokumanzisa i-samente iwuchungechunge lwezindlela eziyinkimbinkimbi zomzimba nezamakhemikhali phakathi kwe-samente namanzi. Lezi zindlela zokwenza i-samente paste iqine kancane kancane ukuze yakhe isakhiwo esiqinile, ekugcineni ikhiqize imikhiqizo yokumanzisa njenge-calcium silicate hydrate (CSH) kanye ne-calcium hydroxide (CH). Phakathi nale nqubo, izinga lokusabela kokumanzisa i-samente, ukugeleza kwamanzi kanye nokugcinwa kwamanzi kwe-slurry, kanye nokwakheka kwemikhiqizo yokumanzisa kuthinta ngqo amandla nokuqina kwe-samente yokugcina.
2. Indlela yokusebenza kwama-cellulose ethers
I-Cellulose ether idlala indima ebalulekile yokulawula ngokomzimba namakhemikhali enqubweni yokumunca usimende. I-Cellulose ether ithinta kakhulu inqubo yokumunca usimende ngezindlela ezimbili: enye ithinta ukusatshalaliswa kanye nokuhwamuka kwamanzi esihlabathini; enye ithinta ukuhlakazeka kanye nokujiya kwezinhlayiya zesimende.
Ukulawulwa komswakama kanye nokugcinwa kwamanzi
Ama-cellulose ether angathuthukisa kakhulu ukugcinwa kwamanzi kwezinto ezisekelwe kusimende. Ngenxa yokuthi i-hydrophilicity yayo enamandla, i-cellulose ether ingakha isisombululo esiqinile se-colloidal emanzini, esingamunca futhi sigcine umswakama. Lo mthamo wokubamba amanzi ubalulekile ekunciphiseni imifantu ebangelwa ukulahleka kwamanzi ngokushesha kukhonkolo ngesikhathi sokufaka amanzi ngokushesha. Ikakhulukazi ezindaweni ezomile noma ezimweni zokwakhiwa kwezinga lokushisa eliphezulu, i-cellulose ether ingavimbela ngempumelelo amanzi ukuthi aphele ngokushesha kakhulu futhi iqinisekise ukuthi inani lamanzi ku-slurry yesimende lanele ukusekela ukusabela okuvamile kokufaka amanzi.
I-Rheology kanye nokujiya
Ama-cellulose ether angathuthukisa futhi i-rheology yama-slurry esimende. Ngemva kokufaka i-cellulose ether, ukuhambisana kwe-slurry yesimende kuzokhula kakhulu. Lesi simo sibangelwa kakhulu yisakhiwo seketanga elide elakhiwe ama-molecule e-cellulose ether emanzini. Le molekyuli yeketanga elide ingavimbela ukunyakaza kwezinhlayiya zesimende, ngaleyo ndlela yandise i-viscosity kanye nokuvumelana kwe-slurry. Lesi sici sibaluleke kakhulu ekusetshenzisweni okufana nokuplasta kanye nokunamathela kwethayela, njengoba kuvimbela i-simende ukuthi ingagelezi ngokushesha kakhulu ngenkathi inikeza ukusebenza okungcono kokwakha.
Libazisa umswakama futhi ulungise isikhathi sokusetha
I-cellulose ether ingalibazisa ukusabela kokumanzisa kwesimende futhi yandise ukusetha kokuqala kanye nesikhathi sokugcina sokusetha kwe-slurry yesimende. Lo mphumela uvela ngoba ama-molecule e-cellulose ether anamathela ebusweni bezinhlayiya zesimende, akha isithiyo esivimbela ukuxhumana okuqondile phakathi kwamanzi nezinhlayiya zesimende, ngaleyo ndlela sehlise ijubane lokusabela kokumanzisa. Ngokulibazisa isikhathi sokusetha, ama-cellulose ether angathuthukisa ukusebenza kokwakha, anikeze abasebenzi bokwakha isikhathi esengeziwe sokwenza ukulungisa nokulungisa.
3. Umphumela esimweni semikhiqizo yokumanzisa usimende
Ukuba khona kwama-cellulose ethers nakho kuthinta isakhiwo esincane semikhiqizo yokufuthwa kwesimende. Izifundo zibonise ukuthi isimo sejeli le-calcium silicate hydrate (CSH) sizoshintsha ngemva kokufaka i-cellulose ether. Ama-molecule e-cellulose ether angathinta isakhiwo sekristalu se-CSH, okwenza kube lula kakhulu. Lesi sakhiwo esikhululekile singanciphisa amandla okuqala ngezinga elithile, kodwa futhi sisiza ekuthuthukiseni ukuqina kwezinto.
Ama-cellulose ether anganciphisa nokwakheka kwe-ettringite ngesikhathi senqubo yokufutha. Njengoba i-cellulose ether ibambezela izinga lokusabela kokufutha, izinga lokwakheka kwe-ettringite kusimende liyancishiswa, ngaleyo ndlela kunciphisa ukucindezeleka kwangaphakathi okubangelwa ukwanda kwevolumu ngesikhathi senqubo yokufutha.
4. Umphumela ekuthuthukisweni kwamandla
Ama-cellulose ether nawo anomthelela omkhulu ekuthuthukisweni kwamandla kwezinto ezisekelwe kusimende. Ngenxa yokuthi ama-cellulose ether abambezela izinga lokumuncwa kwesimende, ukuthuthukiswa kwamandla okuqala kwama-paste esimende kuvame ukuhamba kancane. Kodwa-ke, njengoba ukusabela kokumuncwa kuqhubeka, umphumela olawulayo wokugcinwa kwamanzi e-cellulose ether kanye nesimo somkhiqizo wokumuncwa kungavela kancane kancane, okuzosiza ekuthuthukiseni amandla esigabeni esilandelayo.
Kufanele kuqashelwe ukuthi inani elengeziwe kanye nohlobo lwe-cellulose ether kunomthelela ophindwe kabili emandleni. Inani elifanele le-cellulose ether lingathuthukisa ukusebenza kokwakhiwa futhi landise amandla kamuva, kodwa ukusetshenziswa ngokweqile kungaholela ekunciphiseni amandla okuqala ezinto ezisekelwe kusimende futhi kuthinte izakhiwo zokugcina zemishini. Ngakho-ke, ekusetshenzisweni okungokoqobo, uhlobo kanye nomthamo we-cellulose ether kudingeka kulungiselelwe futhi kuklanywe ngokwezidingo ezithile zobunjiniyela.
I-cellulose ether ithinta inqubo yokumunca amanzi kanye nezakhiwo zezinto zikasimende ngokuthuthukisa ukugcinwa kwamanzi kwezinto ezisekelwe kusimende, ukulungisa izinga lokumunca amanzi, kanye nokuthinta uhlobo lwemikhiqizo yokumunca amanzi. Nakuba ama-cellulose ether angabangela ukulahlekelwa amandla okuqala, angathuthukisa ukuqina nokuqina kwekhonkrithi esikhathini eside. Ukwengezwa kwe-cellulose ether nakho kungathuthukisa kakhulu ukusebenza kokwakhiwa, ikakhulukazi ezimweni zokusetshenziswa ezidinga isikhathi eside sokusebenza kanye nezidingo eziphezulu zokugcina amanzi. Inezinzuzo ezingenakuphikwa. Ezisetshenzisweni zobunjiniyela zangempela, ukukhetha okunengqondo kohlobo kanye nomthamo we-cellulose ether kungalinganisa amandla, ukusebenza kokwakhiwa kanye nezidingo zokuqina kwezinto.
Isikhathi sokuthunyelwe: Septhemba-27-2024