Odakeni lukasimende nodaka olusekelwe ku-gypsum,i-hydroxypropyl methylcelluloseikakhulukazi idlala indima yokugcina amanzi kanye nokuqina, okungathuthukisa ngokuphumelelayo ukubumbana nokumelana nokuqina kwe-slurry.Izinto ezifana nezinga lokushisa lomoya, izinga lokushisa kanye nomfutho womoya zizophazamisa izinga lokuhwamuka kwamanzi odaka lukasimende kanye nemikhiqizo eyenziwe ngegypsum.Ngakho-ke, ezinkathini ezihlukene zonyaka, kunomehluko othile kumphumela wokugcina amanzi wemikhiqizo enenani elifanayo le-hydroxypropyl methylcellulose engeziwe.Ekwakhiweni okuthile, umphumela wokugcina amanzi we-slurry ungalungiswa ngokwandisa noma ukwehlisa inani le-HPMC elingeziwe.Ukugcinwa kwamanzi kwe-methyl cellulose ether ezingeni lokushisa eliphezulu kuyinkomba ebalulekile yokuhlukanisa ikhwalithi ye-methyl cellulose ether.
Imikhiqizo yochungechunge oluhle kakhulu lwe-hydroxypropyl methylcellulose ingaxazulula ngokuphumelelayo inkinga yokugcinwa kwamanzi ekushiseni okuphezulu.Ezikhathini zokushisa okuphezulu, ikakhulukazi ezindaweni ezishisayo nezomile kanye nokwakhiwa kongqimba oluncane ohlangothini olushisayo, i-HPMC yekhwalithi ephezulu iyadingeka ukuze kuthuthukiswe ukugcinwa kwamanzi odaka.
Ikhwalithi ephezulu ye-HPMC, enokufana okuhle kakhulu, amaqembu ayo e-methoxy kanye ne-hydroxypropoxy asatshalaliswa ngokulinganayo eceleni kweketango lamangqamuzana e-cellulose, elingathuthukisa ikhono lama-athomu omoya-mpilo ku-hydroxyl ne-ether bond ukuze ahlangane namanzi ukuze akhe izibopho ze-hydrogen , ukuze amanzi amahhala aba amanzi abophekile, ukuze alawule ngokuphumelelayo ukuhwamuka kwamanzi okubangelwa izinga lokushisa eliphezulu futhi kuzuzwe ukugcinwa kwamanzi aphezulu.Amanzi ayadingeka ukuze kufakwe amanzi ukuze kusethwe izinto zikasimende ezifana usimende negypsum.Inani elilungile le-HPMC lingagcina amanzi kudaka isikhathi eside ngokwanele ukuvumela ukusethwa kanye nenqubo yokuqina ukuthi iqhubeke.
Inani le-HPMC elidingekayo ukuze kutholwe umthamo owanele wokugcina amanzi lincike kulokhu:
1. Ukumunca kwesendlalelo sesisekelo
2. Ukwakheka kodaka
3. Ukuqina kodaka
4. Imfuneko yamanzi yodaka
5. Isikhathi sokusetha se-cementitious material
Ikhwalithi ephezulu ye-hydroxypropyl methylcellulose ingahlakazwa ngokulinganayo nangempumelelo ku-cement mortar kanye nemikhiqizo esekelwe ku-gypsum, futhi isonga zonke izinhlayiya eziqinile, futhi yakha ifilimu yokumanzisa, futhi umswakama osesisekelweni ukhishwa kancane kancane isikhathi eside., futhi ukusabela kwe-hydration kwenzeka nge-inorganic cementitious material, ngaleyo ndlela kuqinisekiswe amandla okubopha kanye namandla okucindezela kwezinto.
isithombe
Ngakho-ke, ekwakhiweni kwehlobo lokushisa eliphezulu, ukuze kuzuzwe umphumela wokugcinwa kwamanzi, kuyadingeka ukwengeza imikhiqizo yekhwalithi ephezulu ye-HPMC ngamanani anele ngokusho kwefomula, ngaphandle kwalokho, kuyoba khona ukugeleza okwanele, ukunciphisa amandla, ukuqhekeka, ukugoba nokuwa okubangelwa ukomiswa ngokushesha okukhulu.Kuphinde kwandise ubunzima bokwakha kubasebenzi.Njengoba izinga lokushisa lincipha, inani elingeziwe le-HPMC lingancishiswa kancane kancane, futhi umphumela ofanayo wokugcina amanzi ungafinyelelwa.
Isikhathi sokuthumela: Oct-20-2022