I-cellulose ether HPMC ku-cement mortar kanye ne-gypsum slurry, ikakhulukazi idlala indima yokugcina amanzi kanye nokuqina, ingathuthukisa ngempumelelo ukunamathela kanye nokumelana nokuwa kwe-slurry.
Izinga lokushisa lomoya, izinga lokushisa kanye nengcindezi yomoya kungathinta izinga lokuhwamuka kwamanzi emikhiqizweni yesamente kanye ne-gypsum. Ezinkathini ezahlukene, umphumela wokugcina amanzi we-slurry ungalungiswa ngokwandisa noma ukunciphisa inani le-HPMC. Ekwakhiweni kwezinga lokushisa eliphezulu lasehlobo, ukuze kufezwe umphumela wokonga amanzi, kuyadingeka ukwengeza imikhiqizo ye-HPMC ngobuningi obanele ngokwefomula. Ngaphandle kwalokho, kuzoba nokumanzi okwanele, ukunciphisa amandla, ukuqhekeka, i-drum engenalutho kanye nokuchitheka okubangelwa ukoma okusheshayo kakhulu, kanye nezinye izinkinga zekhwalithi. Njengoba izinga lokushisa lehla, inani le-HPMC lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Kukhona umehluko nezizathu ezithile zomphumela wokugcina amanzi wenani elifanayo lemikhiqizo engeziwe ye-HPMC. Imikhiqizo emihle kakhulu yochungechunge lwe-HPMC ingaxazulula ngempumelelo inkinga yokugcina amanzi ngaphansi kokushisa okuphezulu. Esikhathini sokushisa okuphezulu, ikakhulukazi ezindaweni ezishisayo nezomile kanye nokwakhiwa kwezingqimba ezincane ohlangothini olunelanga, i-HPMC esezingeni eliphezulu iyadingeka ukuthuthukisa ukugcinwa kwamanzi kwe-slurry. I-HPMC esezingeni eliphezulu, amaqembu ayo e-methoxy ne-hydroxypropyl ngokusatshalaliswa okufanayo kwe-cellulose molecular chain, ingathuthukisa isibopho se-hydroxyl ne-ether kuma-athomu e-oxygen kanye nekhono lokuhlangana kwamanzi ne-hydrogen, yenze amanzi akhululekile abe ngamanzi ahlanganisiwe. Futhi ihlakazeke ngempumelelo ku-slurry futhi igoqe zonke izinhlayiya eziqinile, ukusabela kwe-hydration ngezinto zokufaka i-simenti ezingaphili, kanye nokwakheka kwengqimba yefilimu yokumanzisa, amanzi esisekelweni akhishwa kancane kancane isikhathi eside, ukuze kulawulwe ngempumelelo ukuhwamuka kwamanzi okubangelwa isimo sezulu esishisayo, ukuze kufezwe ukugcinwa kwamanzi okuphezulu.
Ukugcinwa kwamanzi kwemikhiqizo ye-HPMC kuvame ukuthintwa yizici ezilandelayo:
1. Ukufana kwe-HPMC: Ukusabela okufanayo kwe-HPMC, i-methoxy, ukusatshalaliswa okufanayo kwe-hydroxypropoxy, ukugcinwa kwamanzi okuphezulu.
Izinga lokushisa lejeli elishisayo le-HPMC eli-2: Ijeli elishisayo linokushisa okuphezulu
izinga lokushisa kanye nezinga eliphezulu lokugcinwa kwamanzi; ngaphandle kwalokho, inezinga eliphansi lokugcinwa kwamanzi.
3. Ukuqina kwe-HPMC: Lapho ukuqina kwe-HPMC kukhuphuka, izinga lokugcina amanzi nalo liyakhuphuka. Lapho
ukuchachamba kufinyelela izinga elithile, ukwanda kwesilinganiso sokugcina amanzi kuvame ukuba mnene.
4. Okuqukethwe kwe-HPMC：Uma i-HPMC ingezwa kakhulu, izinga lokugcina amanzi liyanda futhi umphumela wokugcina amanzi uba ngcono. Esilinganisweni esingu-0.25-0.6%, izinga lokonga amanzi landa ngokushesha ngokukhula kwenani elengeziwe. Lapho inani elengeziwe landa kakhulu, umkhuba wokwanda kwesilinganiso sokonga amanzi waba kancane.
Isikhathi sokuthunyelwe: Julayi-29-2022