Udaka oluxubene olumanzi usimende, isamba esihle, ingxube, amanzi nezinye izingxenye ezihlukahlukene ezinqunywa ngokuya ngokusebenza.Ngokwesilinganiso esithile, ngemva kokulinganiswa nokuxuba esiteshini sokuxuba, sithuthelwa endaweni yokusetshenziswa iloli ye-mixer, bese sifakwa endaweni ekhethekile Ukuxuba okumanzi kugcinwa esitsheni futhi kusetshenziswe phakathi nesikhathi esibekiwe.
IHydroxypropyl methylcellulose isetshenziswa njenge-ejenti egcina amanzi kanye ne-retarder yodaka lukasimende ukwenza udaka lumpompe.Isetshenziswa njengesibophezelo ekukhoneni kukakhonkolo, ithuthukisa ukusabalala futhi yandise isikhathi sokusebenza.Ukusebenza kokugcinwa kwamanzi kwe-hydroxypropyl methylcellulose HPMC kuvimbela udaka ekuqhekekeni ngenxa yokoma ngokushesha ngemva kokufakwa, futhi kuthuthukisa amandla ngemva kokuqina.Ukugcinwa kwamanzi wukusebenza okubalulekile kwe-hydroxypropyl methylcellulose HPMC, futhi kuwukusebenza abakhiqizi abaningi basekhaya bemiksi ye-wet-mortar abakunaka.Izinto ezithinta umphumela wokugcina amanzi wodaka oluxutshwe okumanzi zifaka inani le-HPMC elingeziwe, i-viscosity ye-HPMC, ukucoleka kwezinhlayiya, kanye nezinga lokushisa lendawo yokusetshenziswa.
Iqhaza elibalulekile le-hydroxypropyl methylcellulose HPMC odakeni lwengxube emanzi ikakhulukazi inezici ezintathu, eyodwa iwumthamo omuhle kakhulu wokugcinwa kwamanzi, enye ithonya lokungaguquguquki kanye ne-thixotropy ye-wet-mix mortar, kanti okwesithathu ukusebenzisana nosimende.Umphumela wokugcina amanzi we-cellulose ether uncike ekumunceni kwamanzi kwesendlalelo sesisekelo, ukwakheka kodaka, ukujiya kongqimba lodaka, isidingo samanzi sodaka, kanye nesikhathi sokusetha sendawo yokusetha.Uma kuphezulu ukucaca kwe-hydroxypropyl methylcellulose, kuba ngcono ukugcinwa kwamanzi.
Izinto ezithinta ukugcinwa kwamanzi kwe-wet-mix mortar zihlanganisa i-cellulose ether viscosity, inani elingeziwe, ubuhle bezinhlayiyana kanye nezinga lokushisa lokusebenzisa.Uma kukhulu i-viscosity ye-cellulose ether, kuba ngcono ukusebenza kokugcinwa kwamanzi.I-Viscosity iyipharamitha ebalulekile yokusebenza kwe-HPMC.Ngomkhiqizo ofanayo, imiphumela ye-viscosity elinganiswa ngezindlela ezihlukene ihluke kakhulu, futhi eminye inomehluko ophindwe kabili.Ngakho-ke, lapho uqhathanisa i-viscosity, kufanele yenziwe phakathi kwezindlela ezifanayo zokuhlola, kufaka phakathi izinga lokushisa, i-rotor, njll.
Ngokuvamile, ukuphakama kwe-viscosity, kuba ngcono umphumela wokugcina amanzi.Kodwa-ke, ukuphakama kwe-viscosity kanye nesisindo samangqamuzana se-HPMC siphezulu, ukwehla okuhambisanayo ekuncibilikeni kwayo kuzoba nomthelela omubi emandleni nasekusebenzeni kokwakhiwa kodaka.Ukuphakama kwe-viscosity, kusobala kakhulu umphumela wokuqina odongeni, kodwa awulingani ngokuqondile.Ukuphakama kwe-viscosity, i-viscous yodaka olumanzi luyoba ngaphezulu, okungukuthi, ngesikhathi sokwakhiwa, kubonakala njengokunamathela ku-scraper nokunamathela okuphezulu ku-substrate.Kodwa akusizi ukwandisa amandla esakhiwo sodaka olumanzi ngokwalo.Ngesikhathi sokwakhiwa, ukusebenza kwe-anti-sag akubonakali.Ngokuphambene, enye i-hydroxypropyl methylcellulose eguquliwe ene-viscosity emaphakathi nephansi inokusebenza okuhle kakhulu ekuthuthukiseni amandla esakhiwo sodaka olumanzi.
Uma likhulu inani le-cellulose ether HPMC engezwe odakeni oluxutshwe okumanzi, kuba ngcono ukusebenza kokugcinwa kwamanzi, kanye nokuphakama kwe-viscosity, kuba ngcono ukusebenza kokugcinwa kwamanzi.I-Fineness futhi iyinkomba yokusebenza ebalulekile ye-hydroxypropyl methylcellulose.
Ukucoleka kwe-hydroxypropyl methylcellulose nakho kunomthelela othile ekugcineni amanzi.Ngokuvamile, ku-hydroxypropyl methylcellulose ene-viscosity efanayo kodwa ukucoleka okuhlukile, ukucoleka kuba ngcono kakhulu umphumela wokugcinwa kwamanzi ungcono.
Ngodaka oluxutshwe okumanzi, inani elingeziwe le-cellulose ether HPMC liphansi kakhulu, kodwa lingathuthukisa kakhulu ukusebenza kokwakhiwa kodaka oluxutshwe okumanzi, futhi liyisithasiselo esiyinhloko esithinta ukusebenza kokwakhiwa kodaka.Ukukhethwa okunengqondo kwe-hydroxypropyl methylcellulose kunomthelela omkhulu ekwenzeni ngcono ukusebenza kodaka oluxutshwe okumanzi.
Isikhathi sokuthumela: Mar-31-2023