Ku-putty, udaka lukasimende kanye ne-gypsum-based slurry,I-HPMCI-hydroxypropyl methylcellulose ether ngokuyinhloko idlala indima yokugcina amanzi kanye nokuqina, futhi ingathuthukisa ngempumelelo ukunamathela kanye nokumelana ne-slurry. Izinto ezifana nezinga lokushisa lomoya, izinga lokushisa kanye nesivinini somfutho womoya zizothinta izinga lokuguquguquka kwamanzi ku-putty, udaka lukasimende kanye nemikhiqizo esekelwe ku-gypsum. Ngakho-ke, ezinkathini ezihlukene zonyaka, kunomehluko othile kumphumela wokugcina amanzi wemikhiqizo enenani elifanayo le-HPMC elingeziwe. Ekwakhiweni okuthile, umphumela wokugcina amanzi we-slurry ungalungiswa ngokwandisa noma ukwehlisa inani le-HPMC elingeziwe.
Ukugcinwa kwamanzi kwe-methyl cellulose ether ngaphansi kwezimo zokushisa okuphezulu kuyinkomba ebalulekile yokuhlukanisa ikhwalithi ye-methyl cellulose ether. Imikhiqizo emihle kakhulu yochungechunge lwe-HPMC ingaxazulula ngokuphumelelayo inkinga yokugcinwa kwamanzi ngaphansi kwezinga lokushisa eliphezulu. Ezikhathini zokushisa okuphezulu, ikakhulukazi ezindaweni ezishisayo nezomile kanye nokwakhiwa kongqimba oluncane ohlangothini olushisayo, i-HPMC yekhwalithi ephezulu iyadingeka ukuze kuthuthukiswe ukugcinwa kwamanzi odaka. I-HPMC yekhwalithi ephezulu ingaguqula amanzi amahhala asesimendeni abe amanzi abophekile, ngaleyo ndlela ilawule ngempumelelo ukuhwamuka kwamanzi okubangelwa izinga lokushisa eliphezulu kanye nokuzuza ukugcinwa kwamanzi okuphezulu.
Ikhwalithi ephezulu ye-methyl cellulose ingahlakazwa ngokulinganayo nangempumelelo ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum, futhi isonge zonke izinhlayiya eziqinile, futhi yakha ifilimu yokumanzisa, futhi amanzi azokhishwa kancane kancane isikhathi eside. Ukusabela kwe-hydration kwenzeka, ngaleyo ndlela kuqinisekisa amandla ebhondi namandla acindezelayo wento. Ngakho-ke, ekwakhiweni kwehlobo lokushisa eliphezulu, ukuze kuzuzwe umphumela wokugcina amanzi, kuyadingeka ukwengeza imikhiqizo yekhwalithi ephezulu ye-HPMC ngamanani anele ngokusho kwefomula. Uma i-HPMC ehlanganisiwe isetshenziswa, ukugeleza kwamanzi okunganele, amandla ancishisiwe, ukuqhekeka, kanye ne-voids kuzokwenzeka ngenxa yokomisa ngokweqile. Izinkinga ezisezingeni eliphezulu njengezigubhu nokuchithwa kwandisa nobunzima bokwakha kubasebenzi. Njengoba izinga lokushisa lehla, inani le-HPMC elingeziwe lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Inqubo yokusabela ilawula ngokunembile ukukhiqizwa kweI-HPMC, futhi ukushintshwa kwayo kuphelele futhi ukufana kwayo kuhle kakhulu. Isixazululo saso esinamanzi sicacile futhi sisobala, sinemicu embalwa yamahhala. Ukuhambisana ne-rubber powder, usimende, i-lime nezinye izinto eziyinhloko kunamandla ikakhulukazi, okungenza izinto eziyinhloko zidlale ukusebenza kahle kakhulu. Kodwa-ke, i-HPMC enokusabela okungekuhle inemicu eminingi yamahhala, ukusatshalaliswa okungalingani kwezinto ezibambile, ukugcinwa kwamanzi okungekuhle kanye nezinye izakhiwo, okuholela emazingeni amaningi okuhwamuka lapho izinga lokushisa liphezulu. Kodwa-ke, okuthiwa i-HPMC (uhlobo lwenhlanganisela) enenani elikhulu lokungcola kunzima ukuxhumanisa nomunye nomunye, ngakho ukugcinwa kwamanzi nezinye izakhiwo zimbi nakakhulu. Uma kusetshenziswa i-HPMC yezinga eliphansi, izinkinga ezifana namandla aphansi e-slurry, isikhathi esifushane sokuvula, impushana, ukuqhekeka, ukugoba nokuchithwa kuzobangelwa, okuzokwandisa ubunzima bokwakha futhi kunciphise kakhulu izinga lesakhiwo.
Isikhathi sokuthumela: Apr-28-2024