Udaka oluxubile olumanzi: udaka oluxubile luhlobo lwesimende, i-aggregate encane, ingxube namanzi, futhi ngokwezakhiwo zezingxenye ezahlukahlukene, ngokwesilinganiso esithile, ngemva kokulinganiswa esiteshini sokuxuba, luxutshwe, luthuthwe luye endaweni lapho iloli lisetshenziswa khona, bese lufakwa endaweni ekhethekile Gcina isitsha bese usebenzisa ingxube emanzi eqediwe isikhathi esibekiwe.
I-Hydroxypropyl methylcellulose isetshenziswa njenge-ejenti yokugcina amanzi kodaka lukasimende kanye ne-retarder yokupompa udaka. Endabeni ye-gypsum njenge-binder yokuthuthukisa ukusetshenziswa nokwandisa isikhathi sokusebenza, ukugcinwa kwamanzi kwe-HPMC kuvimbela ukuqhekeka kodaka ngokushesha ngemva kokoma, futhi kuthuthukisa amandla ngemva kokuqina. Ukugcinwa kwamanzi kuyisici esibalulekile se-hydroxypropyl methylcellulose HPMC, futhi kuyinto ekhathazayo abakhiqizi abaningi be-wet-mix mortar basekhaya. Izici ezithinta umphumela wokugcinwa kwamanzi kodaka oluxutshwe ngamanzi zifaka phakathi inani le-HPMC elingeziwe, i-viscosity ye-HPMC, ubuncane bezinhlayiya kanye nokushisa kwendawo yokusetshenziswa.
Kunemisebenzi emithathu eyinhloko ye-hydroxypropyl methylcellulose HPMC ku-wet-mix mortar, omunye amandla amahle okugcina amanzi, omunye ithonya ekuqineni nasekuqineni kwe-thixotropy yo-wet-mix mortar, kanti owesithathu ukusebenzisana ne-samente. Ukugcinwa kwamanzi kwe-cellulose ether kuncike esilinganisweni sokumuncwa kwamanzi sesisekelo, ukwakheka ko-mortar, ukujiya kwengqimba yo-mortar, isidingo samanzi so-mortar, kanye nesikhathi sokusetha. Uma ukucaca kwe-hydroxypropyl methylcellulose kuphakeme, ukugcinwa kwamanzi kuba ngcono.
Izici ezithinta ukugcinwa kwamanzi kodaka oluxutshwe ngamanzi zifaka phakathi i-cellulose ether viscosity, inani lokwengeza, usayizi wezinhlayiya kanye nokushisa. Uma i-cellulose ether i-viscosity inkulu, kulapho ukugcinwa kwamanzi kuba ngcono khona. I-Viscosity iyipharamitha ebalulekile yokusebenza kwe-HPMC. Kumkhiqizo ofanayo, imiphumela yokusebenzisa izindlela ezahlukene zokulinganisa i-viscosity iyahlukahluka kakhulu, futhi eminye inesikhala esiphindwe kabili. Ngakho-ke, ukuqhathaniswa kwe-viscosity kumele kwenziwe ngendlela efanayo yokuhlola, kufaka phakathi izinga lokushisa, i-spindle, njll.
Ngokuvamile, uma i-viscosity iphakeme, kuba ngcono ukugcinwa kwamanzi. Kodwa-ke, uma i-viscosity iphakeme, isisindo sama-molecule se-HPMC siphakeme futhi ukuncibilika kwe-HPMC kwehla, okunomthelela omubi emandleni nasekusebenzeni kokwakhiwa kwe-mortar. Uma i-viscosity iphakeme, kusobala kakhulu ukuthi umphumela wokujiya kwe-mortar uyabonakala, kodwa awuhlobene ngqo. Uma i-viscosity iphakeme, uma i-mortar emanzi iqine kakhulu, kulapho ukusebenza kokwakhiwa kuba ngcono, ukusebenza kwe-viscous scraper kanye nokunamathela okuphezulu ku-substrate. Kodwa-ke, amandla esakhiwo akhuphukile e-mortar emanzi ngokwayo awasizi. Lezi zakhiwo ezimbili azinawo amandla acacile okulwa nokuwa. Ngokuphambene nalokho, i-viscosity ethile ephakathi nendawo nephansi kodwa i-hydroxypropyl methylcellulose eguquliwe inokusebenza okuhle kakhulu ekuthuthukiseni amandla esakhiwo se-mortar emanzi.
Uma inani elikhulu le-cellulose ether engezwe ku-PMC wet mortar likhula, ukugcinwa kwamanzi kuba ngcono, futhi uma i-viscosity iphakeme, ukugcinwa kwamanzi kuba ngcono. Ubunono buyisibonakaliso esibalulekile sokusebenza kwe-hydroxypropyl methylcellulose.
Ubuncane be-hydroxypropyl methylcellulose bunomthelela othile ekugcinweni kwamanzi kwayo. Ngokuvamile, kwi-hydroxypropyl methylcellulose ene-viscosity efanayo kanye nobuncane obuhlukile, uma ubuncane buncane, umphumela wokugcina amanzi uba mncane ngaphansi kwenani elifanayo lokwengeza. Kungcono.
Ku-mortar exutshwe ngamanzi, inani lokwengeza le-cellulose ether HPMC liphansi kakhulu, kodwa lingathuthukisa kakhulu ukusebenza kokwakhiwa kwe-mortar emanzi, futhi yilona element eliyinhloko elithinta kakhulu ukusebenza kwe-mortar. Ukukhetha okunengqondo kwe-hydroxypropyl methylcellulose, ukusebenza kwe-mortar emanzi kuthinteka kakhulu.
Isikhathi sokuthunyelwe: Ephreli-25-2023