Kwi-cement mortar kunye ne-gypsum-based slurry, i-hydroxypropyl methylcellulose idlala indima enkulu yokugcina amanzi kunye nokuqina, kwaye inokuphucula ngokufanelekileyo ukubambelela kunye nokuxhatshazwa kwe-sag ye-slurry.
Izinto ezifana nobushushu bomoya, ubushushu kunye nesantya soxinzelelo lomoya ziya kuchaphazela izinga lokuguquguquka kwamanzi kudaka lwesamente kunye neemveliso ezisekwe kwigypsum. Ngoko ke, ngamaxesha ahlukeneyo, kukho ukungafani kwisiphumo sokugcinwa kwamanzi kwiimveliso ezinomlinganiselo ofanayo we-hydroxypropyl methylcellulose eyongeziweyo. Kulwakhiwo oluthile, umphumo wokugcinwa kwamanzi we-slurry unokulungiswa ngokunyuka okanye ukunciphisa inani le-HPMC elongezelelweyo. Ukugcinwa kwamanzi phantsi kweemeko eziphezulu zeqondo lokushisa luphawu olubalulekileyo lokuhlukanisa umgangatho we-hydroxypropyl methylcellulose ether.
Iimveliso ezigqwesileyo ze-hydroxypropyl methylcellulose zinokucombulula 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. Umgangatho ophezulu we-HPMC unokufana okuhle kakhulu. Amaqela ayo e-methoxy kunye ne-hydroxypropoxy asasazwa ngokulinganayo kunye ne-cellulose molecular chain, enokuphucula amandla e-athomu ze-oksijini kwi-hydroxyl kunye ne-ether bonds ukudibanisa namanzi ukwenza iibhondi ze-hydrogen. , ukuze amanzi akhululekile abe ngamanzi abophekileyo, ukuze alawule ngokufanelekileyo ukufuduka kwamanzi okubangelwa yimozulu yokushisa okuphezulu, kunye nokufezekisa ukugcinwa kwamanzi aphezulu.
Umgangatho ophezulu we-hydroxypropyl methylcellulose unokusasazwa ngokulinganayo nangokufanelekileyo kudaka lwesamente kunye neemveliso ezisekwe kwigypsum, kwaye usonge onke amasuntswana aqinileyo, kwaye wenze ifilimu yokumanzisa, kwaye ukufuma kwisiseko kukhutshwa kancinci kancinci ixesha elide, kunye ne-hydration reaction kunye ne-inorganic gelling material ukuqinisekisa amandla okubopha kunye namandla acinezelayo.
Ngoko ke, ekwakhiweni kwehlobo lobushushu obuphezulu, ukwenzela ukuba kufezekiswe umphumo wokugcinwa kwamanzi, kuyimfuneko yokongeza iimveliso ze-HPMC ezikumgangatho ophezulu ngobuninzi obaneleyo ngokwefomula, ngaphandle koko, kuya kubakho ukungonelanga kwe-hydration, ukunciphisa amandla, ukuqhekeka, ukugoba kunye nokuchithwa okubangelwa ukomisa ngokugqithiseleyo. iingxaki, kodwa ukwandisa ubunzima bokwakha kwabasebenzi. Njengoko iqondo lokushisa liyehla, inani le-HPMC elongezelelweyo lingancitshiswa ngokuthe ngcembe, kwaye umphumo ofanayo wokugcinwa kwamanzi unokufumaneka.
Ixesha lokuposa: Apr-13-2023