I-Cellulose ether HPMC kwi-sement mortar kunye ne-gypsum based slurry, ikakhulu idlala indima yokugcina amanzi kunye nokuqina, inokuphucula ngokufanelekileyo ukunamathela kunye nokumelana nodaka lwe-slurry.
Ubushushu bomoya, iqondo lobushushu kunye noxinzelelo lomoya kunokuchaphazela isantya sokumka kwamanzi kudaka lwesamente kunye neemveliso ezisekwe kwigypsum.Kumaxesha ahlukeneyo onyaka, isiphumo sokugcinwa kwamanzi se-slurry sinokuhlengahlengiswa ngokunyusa okanye ukunciphisa inani le-HPMC.Ekwakhiweni kwehlobo lobushushu obuphezulu, ukuze kufezekiswe umphumo wokugcinwa kwamanzi, kuyimfuneko ukongeza iimveliso ze-HPMC ngobuninzi obaneleyo ngokwefomula.Ngaphandle koko, kuya kubakho ukungonelanga kwe-hydration, ukunciphisa amandla, ukuqhekeka, igubu elingenanto kunye nokuchithwa okubangelwa ukomisa ngokukhawuleza, kunye nezinye iingxaki zomgangatho.Njengoko ubushushu buyancipha, inani le-HPMC lingancitshiswa ngokuthe ngcembe, kwaye umphumo ofanayo wokugcinwa kwamanzi unokufumaneka.
Kukho iiyantlukwano kunye nezizathu zesiphumo sokugcinwa kwamanzi kwisixa esifanayo seemveliso ezongeziweyo HPMC.Iimveliso ezigqwesileyo ze-HPMC zinokusombulula ngempumelelo ingxaki yokugcinwa kwamanzi phantsi kobushushu obuphezulu.Ngexesha lobushushu obuphezulu, ngakumbi kwiindawo ezishushu nezomileyo kunye nolwakhiwo olubhityileyo kwicala elinelanga, umgangatho ophezulu weHPMC uyafuneka ukuze kuphuculwe ukugcinwa kwamanzi eludaka.Umgangatho ophezulu we-HPMC, i-methoxy yayo kunye namaqela e-hydroxypropyl ecaleni kwe-cellulose molecular chain i-uniform distribution, inokuphucula i-hydroxyl kunye ne-ether bond kwii-athom ze-oksijini kunye nombutho wamanzi we-hydrogen bond amandla, ukwenza amanzi asimahla abe ngamanzi adibeneyo.Kwaye isasazwe ngokufanelekileyo kwi-slurry kwaye isongelwe onke amasuntswana aqinileyo, ukusabela kwe-hydration kunye nezixhobo ze-cementing ze-inorganic, kunye nokwakheka kongqimba lwefilimu yokumanzisa, amanzi kwisiseko akhululwa ngokuthe ngcembe ixesha elide, ukuze kulawulwe ngokufanelekileyo ukuvela kwamanzi okubangelwa ngumphunga. ngemozulu yobushushu obuphezulu, ukufezekisa ukugcinwa kwamanzi aphezulu.
Ukugcinwa kwamanzi kwiimveliso ze-HPMC kuhlala kuchatshazelwa zezi zinto zilandelayo:
1. Ukufana kwe-HPMC: Ukusabela okufanayo kwe-HPMC, i-methoxy, i-hydroxypropoxy uniform distribution, ukugcinwa kwamanzi okuphezulu.
2 Ubushushu bejeli ye-HPMC: Ijeli eshushu iphezulu
izinga lobushushu kunye nokugcinwa kwamanzi aphezulu;ngaphandle koko, inezinga eliphantsi lokugcina amanzi.
3. I-viscosity ye-HPMC:Xa i-viscosity ye-HPMC inyuka, izinga lokugcinwa kwamanzi nalo liyenyuka.Xa i
i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwezinga lokugcinwa kwamanzi kuthanda ukuba mnene.
4. Umxholo we-HPMC:Okukhona i-HPMC isongezwa, kokukhona inyuka izinga logcino lwamanzi kwaye kokukhona isiphumo sogcino lwamanzi singcono.Kuluhlu lwe-0.25-0.6%, izinga lokugcinwa kwamanzi liye landa ngokukhawuleza ngokunyuka kwenani elongezelelweyo.Xa isixa-mali esongeziweyo sinyuka ngakumbi, indlela yokunyuka kwezinga lolondolozo lwamanzi iye yacotha.
Ixesha lokuposa: Jul-29-2022