Kwi-putty, udaka lwesamente kunye ne-gypsum-based slurry,HPMCI-hydroxypropyl methylcellulose ether idlala indima enkulu yokugcina amanzi kunye nokuqina, kwaye inokuphucula ngokufanelekileyo ukunamathela kunye nokuxhatshazwa kwe-slurry. Izinto ezifana nobushushu bomoya, ubushushu kunye nesantya soxinzelelo lomoya ziya kuchaphazela izinga lokuguquguquka kwamanzi kwi-putty, udaka lwesamente kunye neemveliso ezisekelwe kwigypsum. Ke ngoko, ngamaxesha ahlukeneyo, kukho umahluko kwisiphumo sokugcinwa kwamanzi kwiimveliso ezinobungakanani obufanayo be-HPMC bongeziweyo. Kulwakhiwo oluthile, umphumo wokugcinwa kwamanzi we-slurry unokulungiswa ngokunyuka okanye ukunciphisa inani le-HPMC elongezelelweyo.
Ukugcinwa kwamanzi kwe-methyl cellulose ether phantsi kweemeko eziphezulu zeqondo lokushisa luphawu olubalulekileyo lokuhlukanisa umgangatho we-methyl cellulose ether. Iimveliso ezigqwesileyo ze-HPMC zinokusombulula ngempumelelo ingxaki yokugcinwa kwamanzi phantsi kobushushu obuphezulu. Ngamaxesha obushushu obuphezulu, ngakumbi kwiindawo ezishushu nezomileyo kunye nolwakhiwo olubhityileyo kwicala elinelanga, i-HPMC ekumgangatho ophezulu iyafuneka ukuze kuphuculwe ukugcinwa kwamanzi kwi-slurry. I-HPMC ekumgangatho ophezulu inokuguqula amanzi asimahla eludaka kumanzi abophekileyo, ngaloo ndlela ilawule ngokufanelekileyo ukuphuphuma kwamanzi okubangelwa bubushushu obuphezulu bemozulu kunye nokuphumeza ukugcinwa kwamanzi aphezulu.
Umgangatho ophezulu we-methyl cellulose unokusasazwa ngokulinganayo nangokufanelekileyo kwi-sement mortar kunye ne-gypsum-based based products, kwaye ubophe zonke iinqununu eziqinileyo, kwaye wenze ifilimu yokumanzisa, kwaye amanzi aya kukhutshwa ngokuthe ngcembe kwixesha elide. Ukusabela kwe-hydration kwenzeka, ngaloo ndlela kuqinisekisa amandla ebhondi kunye namandla acinezelayo wezinto eziphathekayo. Ngoko ke, ekwakhiweni kwehlobo lobushushu obuphezulu, ukwenzela ukuba kufezekiswe umphumo wokugcinwa kwamanzi, kuyimfuneko yokongeza iimveliso ze-HPMC ezikumgangatho ophezulu ngobuninzi obaneleyo ngokwefomula. Ukuba i-compound HPMC isetyenzisiwe, ukungonelanga kwe-hydration, amandla ancitshisiweyo, ukuqhekeka, kunye ne-voids kuya kwenzeka ngenxa yokomisa kakhulu. Iingxaki ezisemgangathweni ezifana namagubu kunye nokuchithwa nazo zandisa ubunzima bokwakha kubasebenzi. Njengoko iqondo lokushisa liyehla, inani le-HPMC elongezelelweyo lingancitshiswa ngokuthe ngcembe, kwaye umphumo ofanayo wokugcinwa kwamanzi unokufumaneka.
Inkqubo yokusabela ilawula ngokuchanekileyo imveliso yeHPMC, kwaye ukutshintshwa kwayo kugqityiwe kwaye ukufana kwayo kuhle kakhulu. Isisombululo saso samanzi sicacile kwaye sicacile, sinemicu embalwa yamahhala. Ukuhambelana kunye ne-rubber powder, i-samente, i-lime kunye nezinye izinto eziphambili zomelele ngokukodwa, ezinokwenza izinto eziphambili zidlale ukusebenza kakuhle. Nangona kunjalo, i-HPMC ene-reaction engalunganga ineentsinga ezininzi zasimahla, ukuhanjiswa okungalinganiyo kwezinto ezibambeleyo, ukugcinwa kwamanzi okulambathayo kunye nezinye iipropathi, okukhokelela kwisixa esikhulu somphunga wamanzi kwimozulu ephezulu yobushushu. Nangona kunjalo, into ebizwa ngokuba yi-HPMC (uhlobo lwe-compound) kunye nenani elikhulu lokungcola kunzima ukulungelelanisa kunye nomnye, ngoko ke ukugcinwa kwamanzi kunye nezinye iimpawu zibi nakakhulu. Xa kusetyenziswa i-HPMC ekumgangatho ophantsi, iingxaki ezinjengokuqina kodaka oluphantsi, ixesha elifutshane lokuvula, umgubo, ukuqhekeka, ukugoba kunye nokuchithwa kuya kubangelwa, okuya kwandisa ubunzima bokwakha kunye nokunciphisa kakhulu umgangatho wesakhiwo.
Ixesha lokuposa: Apr-28-2024