Ku-samente mortar kanye ne-gypsum-based slurry, i-hydroxypropyl methylcellulose idlala indima yokugcina amanzi kanye nokuqina, futhi ingathuthukisa ngempumelelo ukumelana nokunamathela kanye nokuwa kwe-slurry.
Izinto ezifana nokushisa komoya, izinga lokushisa kanye nesivinini sokucindezela komoya kuzothinta izinga lokuguquguquka kwamanzi ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum. Ngakho-ke, ezinkathini ezahlukene, kunomehluko othile emphumeleni wokugcina amanzi wemikhiqizo enenani elifanayo le-hydroxypropyl methylcellulose engeziwe. Ekwakhekeni okuthile, umphumela wokugcina amanzi we-slurry ungalungiswa ngokwandisa noma ukunciphisa inani le-HPMC engeziwe. Ukugcinwa kwamanzi ngaphansi kwezimo zokushisa okuphezulu kuyinkomba ebalulekile yokuhlukanisa ikhwalithi ye-hydroxypropyl methylcellulose ether.
Imikhiqizo emihle kakhulu yochungechunge lwe-hydroxypropyl methylcellulose ingaxazulula ngempumelelo inkinga yokugcina amanzi ngaphansi kokushisa okuphezulu. Ezinkathini zokushisa okuphezulu, ikakhulukazi ezindaweni ezishisayo nezomile kanye nokwakhiwa okunezingqimba ezincane ohlangothini olunelanga, i-HPMC esezingeni eliphezulu iyadingeka ukuthuthukisa ukugcinwa kwamanzi kwe-slurry. I-HPMC esezingeni eliphezulu inokufana okuhle kakhulu. Amaqembu ayo e-methoxy kanye ne-hydroxypropoxy asatshalaliswa ngokulinganayo ku-cellulose molecular chain, okungathuthukisa ikhono lama-athomu e-oxygen kuma-hydroxyl kanye ne-ether bonds ukuhlangana namanzi ukwakha ama-hydrogen bonds. , ukuze amanzi akhululekile abe ngamanzi aboshiwe, ukuze kulawulwe ngempumelelo ukuhwamuka kwamanzi okubangelwa yisimo sezulu esishisa kakhulu, futhi kufezwe ukugcinwa kwamanzi okuphezulu.
I-hydroxypropyl methylcellulose esezingeni eliphezulu ingasakazwa ngokulinganayo nangokuphumelelayo ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum, futhi igoqe zonke izinhlayiya eziqinile, bese yakha ifilimu yokumanzisa, futhi umswakama osesisekelweni ukhishwa kancane kancane isikhathi eside, kanye nokusabela kokumanzisa ngezinto ezingaphili ze-gelling ukuqinisekisa amandla okubopha kanye namandla okucindezela kwezinto.
Ngakho-ke, ekwakheni ehlobo okushisa okuphezulu, ukuze kufezwe umphumela wokugcina amanzi, kuyadingeka ukwengeza imikhiqizo ye-HPMC esezingeni eliphezulu ngobuningi obanele ngokwefomula, ngaphandle kwalokho, kuzoba nokumanzi okwanele, amandla anciphile, ukuqhekeka, ukugoba kanye nokuchitheka okubangelwa ukoma ngokweqile. Kodwa futhi kwandisa ubunzima bokwakha bezisebenzi. Njengoba izinga lokushisa lehla, inani le-HPMC elingeziwe lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Isikhathi sokuthunyelwe: Ephreli-13-2023