I-Cellulose ether iyisengezo esivamile ezintweni zokwakha, esetshenziselwa ukuthuthukisa ukusebenza kokwakhiwa kanye nezakhiwo zemishini zodaka. I-Fineness ingenye yezimpawu ezibalulekile ze-cellulose ether, ebhekisela ekusabalaleni kosayizi wezinhlayiyana.
Izici nokusetshenziswa kwe-cellulose ether
I-cellulose ether ikakhulukazi ihlanganisa i-hydroxypropyl methylcellulose (HPMC), i-hydroxyethyl cellulose (HEC), njll. Imisebenzi yabo eyinhloko ekwakheni udaka ihlanganisa:
Ukugcinwa kwamanzi: ngokunciphisa ukuhwamuka kwamanzi, ukwandisa isikhathi sokugeleza kukasimende, nokuthuthukisa amandla odaka.
Ukuqina: Khulisa i-viscosity yodaka futhi uthuthukise ukusebenza komsebenzi wokwakha.
Thuthukisa ukumelana nokuqhekeka: Indawo yokugcina amanzi ye-cellulose ether isiza ekulawuleni ukushwabana kukasimende, ngaleyo ndlela kunciphe ukwenzeka kokuqhekeka kodaka.
Ukucoleka kwe-cellulose ether kuthinta ukuhlakazeka kwayo, ukunyibilika nokusebenza kahle kodaka, ngaleyo ndlela kuthinte ukusebenza kukonke kodaka.
Umthelela we-cellulose ether fineness emandleni odaka ungahlaziywa kusukela kulezi zici ezilandelayo:
1. Izinga lokuhlakazeka kanye nokuhlakazeka
Izinga lokuqedwa kwe-cellulose ether emanzini lihlobene eduze nokucoleka kwayo. Izinhlayiya ze-cellulose ether ezinokucoleka okuphezulu zincibilika kalula emanzini, ngaleyo ndlela zakhe ngokushesha ukuhlakazeka okufanayo. Lokhu kusatshalaliswa okufanayo kungaqinisekisa ukugcinwa kwamanzi okuzinzile kanye nokujiya kulo lonke uhlelo lodaka, kukhuthaze inqubekelaphambili efanayo yokusabela kwe-siment hydration, futhi kuthuthukise amandla okuqala odaka.
2. Amandla okugcina amanzi
Ukucoleka kwe-cellulose ether kuthinta ukusebenza kwayo kokugcinwa kwamanzi. Izinhlayiya ze-cellulose ether ezinokucoleka okuphakeme zinikeza indawo engaphezulu ekhudlwana ethize, ngaleyo ndlela zakhe izakhiwo ezincane ezigcina amanzi odakeni. Lawa ma-micropores angagcina amanzi ngokuphumelelayo, andise isikhathi sokuphendula usimende, akhuthaze ukwakheka kwemikhiqizo ye-hydration, futhi ngaleyo ndlela athuthukise amandla odaka.
3. Isixhumanisi esibonakalayo
Ngenxa yokuhlakazeka kwazo okuhle, izinhlayiya ze-cellulose ether ezinokucoleka okuphezulu zingakha ungqimba oluhlanganisayo olufana kakhulu phakathi kodaka neqoqo, futhi zithuthukise ukuhlangana kodaka. Lo mphumela usiza udaka ukugcina ipulasitiki enhle ekuqaleni, ukunciphisa ukuvela kwemifantu ye-shrinkage, futhi ngaleyo ndlela kuthuthukise amandla onke.
4. Ukugqugquzelwa kukasimende ukugeleza kwamanzi
Ngesikhathi senqubo ye-cement hydration, ukwakheka kwemikhiqizo ye-hydration kudinga inani elithile lamanzi. I-Cellulose ether ene-fineness ephakeme ingakha izimo ezilinganayo ze-hydration odakeni, igweme inkinga yomswakama okwanele noma oweqile wendawo, iqinisekise ukuqhubeka okuphelele kokusabela kwe-hydration, futhi ngaleyo ndlela ithuthukise amandla odaka.
Ucwaningo lokuhlola nokuhlaziywa kwemiphumela
Ukuze kuqinisekiswe umthelela we-cellulose ether fineness emandleni odaka, ezinye izifundo zokuhlola zalungisa ukucoleka kwe-cellulose ether futhi zahlola izici zayo zomshini zodaka ngaphansi kwezilinganiso ezihlukene.
Idizayini yokuhlola
Ukuhlolwa kuvame ukusebenzisa amasampula e-cellulose ether of finenesses ehlukene futhi kuyawengeza odakeni lukasimende ngokulandelana. Ngokulawula ezinye izinto eziguquguqukayo (ezifana nesilinganiso sikasimende wamanzi, isilinganiso se-aggregate, isikhathi sokuxuba, njll.), ukucoleka kuphela kwe-cellulose ether kuyashintshwa. Uchungechunge lwezivivinyo zamandla, okuhlanganisa amandla acindezelayo namandla okuguquguquka, bese lwenziwa.
Imiphumela yokuhlola ngokuvamile ibonisa:
Amasampula e-cellulose ether anokuqina okuphezulu angathuthukisa kakhulu amandla acindezelayo namandla aguquguqukayo odaka esigabeni sokuqala (njengezinsuku ezi-3 nezinsuku eziyi-7).
Ngokunwetshwa kwesikhathi sokwelapha (njengezinsuku ezingama-28), i-cellulose ether enokuqina okuphezulu ingaqhubeka nokuhlinzeka ngokugcinwa kwamanzi okuhle nokubopha, okubonisa ukukhula kwamandla okuzinzile.
Isibonelo, ekuhlolweni, amandla acindezelayo we-cellulose ether enobuhle be-80 mesh, 100 mesh, ne-120 mesh ezinsukwini ezingu-28 abe ngu-25 MPa, 28 MPa, kanye nama-MPa angu-30, ngokulandelanayo. Lokhu kubonisa ukuthi ukuphakama kokucoleka kwe-cellulose ether, amandla okucindezela odaka aba makhulu.
Ukusetshenziswa okusebenzayo kwe-cellulose ether fineness optimization
1. Lungisa ngokwendawo yokwakha
Uma wakha endaweni eyomile noma ngaphansi kwezimo zokushisa okuphezulu, i-cellulose ether ene-coneness ephakeme ingakhethwa ukuthuthukisa ukugcinwa kwamanzi odaka futhi kuncishiswe ukulahlekelwa amandla okubangelwa ukuhwamuka kwamanzi.
2. Sebenzisa nezinye izithasiselo
I-Cellulose ether enokuqina okuphezulu ingasetshenziswa ngokuhambisana nezinye izithasiselo (njengezinciphisi zamanzi nama-ejenti afaka umoya) ukuze kuthuthukiswe ukusebenza kodaka. Isibonelo, ukusetshenziswa kokunciphisa amanzi kunganciphisa isilinganiso samanzi-samente futhi kwandise ukuminyana kodaka, kuyilapho i-cellulose ether inikeza ukugcinwa kwamanzi kanye nemiphumela yokuqinisa. Ukuhlanganiswa kokubili kungathuthukisa kakhulu amandla odaka.
3. Ukwenza ngcono inqubo yokwakha
Phakathi nenqubo yokwakha, kuyadingeka ukuqinisekisa ukuthi i-cellulose ether ichitheka ngokugcwele futhi ihlakazekile. Lokhu kungafezwa ngokwandisa isikhathi sokuxuba noma ukusebenzisa izinto ezifanele zokuxuba ukuze kuqinisekiswe ukuthi inzuzo ye-fineness ye-cellulose ether isetshenziswa ngokugcwele.
Ukucoleka kwe-cellulose ether kunomthelela omkhulu emandleni odaka. I-Cellulose ether enokuqina okuphezulu ingadlala kangcono indima yokugcina amanzi, iqinise futhi ithuthukise ukuhlangana kokuxhumana, futhi ithuthukise amandla okuqala kanye nezakhiwo zesikhathi eside zodaka. Ezisetshenziswa ezingokoqobo, ubucwebe be-cellulose ether kufanele kukhethwe ngokunengqondo futhi kusetshenziswe ngokuya ngezimo ezithile zokwakha kanye nezidingo zokuthuthukisa ukusebenza kodaka nokuthuthukisa ikhwalithi yephrojekthi.
Isikhathi sokuthumela: Jun-24-2024