Indima ye-hydroxypropyl methyl cellulose ku-wet mortar

Indima kaI-HPMCku-mortar emanzi

Udaka oluxubile olumanzi: Udaka oluxubile luhlobo lwesimende, i-aggregate encane, ingxube namanzi, futhi ngokwezakhiwo zezingxenye ezahlukahlukene, ngesilinganiso esithile, ngemva kokulinganiswa esiteshini sokuxuba, luxutshwe, luthuthwe luye endaweni esetshenziswa yiloli, lufakwe esitsheni sokugcina esikhethekile, futhi lusetshenziswe ngesikhathi esibekiwe ingxube emanzi eqediwe.

I-Hydroxypropyl methyl cellulose isetshenziswa njenge-ejenti yokugcina amanzi ku-cement mortar, retarder mortar pumping. Ku-gypsum njenge-binder yokuthuthukisa ukusetshenziswa nokwandisa isikhathi sokusebenza, i-hydroxypropyl methylcellulose HPMC ukugcinwa kwamanzi ukuze i-slurry ngemva kokomisa ingabi ngokushesha kakhulu futhi iqhekeke, iqine ukuze kuthuthukiswe amandla. Ukugcinwa kwamanzi kuyisici esibalulekile se-hydroxypropyl methyl cellulose HPMC, futhi kuyindaba yabakhiqizi abaningi be-wet mortar. Izici ezithinta umphumela wokugcinwa kwamanzi ku-wet mortar zifaka phakathi inani le-HPMC elingeziwe, i-viscosity ye-HPMC, ubuncane bezinhlayiya kanye nokushisa kwendawo esetshenziswayo.
I-Hydroxypropyl methyl cellulose HPMC ku-wet mortar indima eyinhloko ezicini ezintathu, eyodwa iwumthamo omuhle kakhulu wokubamba amanzi, eyesibili ukuhambisana kwe-wet mortar kanye ne-thixotropy yethonya, eyesithathu ukusebenzisana ne-cement. Ukugcinwa kwamanzi e-cellulose ether kuncike esilinganisweni sokumuncwa kwamanzi kwesisekelo, ukwakheka kwe-mortar mortar, ukujiya kwengqimba ye-mortar, isidingo samanzi e-mortar, isikhathi sokusetha. Uma ukucaca kwe-hydroxypropyl methyl cellulose kuphakeme, ukugcinwa kwamanzi kuba ngcono.
Izici ezithinta ukugcinwa kwamanzi kodaka olumanzi zifaka phakathi i-viscosity ye-cellulose ether, ukwengeza inani, usayizi wezinhlayiya kanye nokushisa. Uma i-viscosity ye-cellulose ether inkulu, kulapho ukugcinwa kwamanzi kuba ngcono khona. I-viscosity iyipharamitha ebalulekile yokusebenza kwe-HPMC. Kumkhiqizo ofanayo, ukusebenzisa izindlela ezahlukene ukukala i-viscosity yemiphumela kuyahlukahluka kakhulu, ezinye ngisho nangesilinganiso sesibili. Ngakho-ke, ukuqhathaniswa kwe-viscosity kumele kwenziwe ngendlela efanayo yokuhlola, kufaka phakathi izinga lokushisa, i-rotor, 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, umphumela wokujiya we-mortar ubonakala kakhulu, kodwa awuhlobene ngqo. Uma i-viscosity iphakeme, uma i-mortar imanzi inamathela kakhulu, ukusebenza kahle kokwakhiwa, ukusebenza kahle kwe-scraper e-viscous kanye nokunamathela okuphezulu ku-substrate. Kodwa-ke, ukuthuthukiswa kwamandla okwakheka kwe-mortar emanzi ngokwayo akuzange kusize. Kokubili ukwakhiwa, ukusebenza akubonakali kuphambene nokusebenza kokulenga. Ngokuphambene nalokho, i-viscosity ethile ephakathi nephansi kodwa i-hydroxypropyl methylcellulose eguquliwe inokusebenza okuhle kakhulu ekuthuthukiseni amandla okwakheka kwe-mortar emanzi.
Uma inani elikhulu le-cellulose ether PMC wet mortar engeziwe, kulapho ukugcinwa kwamanzi kuba ngcono, lapho i-viscosity iba phezulu, yilapho ukugcinwa kwamanzi kuba ngcono. Ubunono buyinkomba yokusebenza ebalulekile ye-hydroxypropyl methyl cellulose.
Ubuncane be-hydroxypropyl methyl cellulose bunethonya elithile ekugcinweni kwamanzi kwayo. Ngaphansi kwezimo ezivamile, i-viscosity efanayo kanye nobuncane obuhlukile be-hydroxypropyl methyl cellulose, ngaphansi kwenani elifanayo lokwengeza, ubuncane bobuncane bomphumela wokugcinwa kwamanzi bungcono.
Ku-mortar emanzi, ukwengeza i-cellulose etherI-HPMCiphansi kakhulu, kodwa ingathuthukisa kakhulu ukusebenza kokwakhiwa kwe-wet mortar, iyisengezo esiyinhloko esithinta kakhulu ukusebenza kwe-wet mortar. Ukusebenza kwe-wet mortar kuthonywa kakhulu ukukhethwa okufanele kwe-hydroxypropyl methyl cellulose.