I-HPMC (i-hydroxypropyl methylcellulose)iyingxube yesakhiwo esetshenziswa kakhulu futhi isetshenziswa kakhulu osikeni lwe-gypsum. Imisebenzi yayo eyinhloko ukuthuthukisa ukusebenza kokwakhiwa kodaka, ukuthuthukisa ukugcinwa kwamanzi, ukuthuthukisa ukunamathela kanye nokulungisa izakhiwo ze-rheological zodaka. I-Gypsum mortar iyimpahla yokwakha ene-gypsum njengengxenye eyinhloko, evame ukusetshenziswa ekwakhiweni kokuhlobisa odongeni nophahla.
1. Umthelela womthamo we-HPMC ekugcinweni kwamanzi kodaka lwegypsum
Ukugcinwa kwamanzi kungenye yezakhiwo ezibalulekile ze-gypsum mortar, ehlobene ngokuqondile nokusebenza kokwakhiwa namandla okubopha kodaka. I-HPMC, njenge-polymer yamangqamuzana aphezulu, inokugcinwa kwamanzi okuhle. Ama-molecule ayo aqukethe inani elikhulu lamaqembu e-hydroxyl ne-ether. Lawa maqembu angama-hydrophilic angakha izibopho ze-hydrogen nama-molecule amanzi ukuze anciphise ukuguquguquka kwamanzi. Ngakho-ke, ukungezwa kwenani elifanele le-HPMC kungathuthukisa ngempumelelo ukugcinwa kwamanzi kodaka futhi kuvimbele udaka ukuthi lome ngokushesha futhi luqhekeke phezulu ngesikhathi sokwakha.
Ucwaningo luye lwabonisa ukuthi ngokwanda komthamo we-HPMC, ukugcinwa kwamanzi kodaka kancane kancane kuyanda. Kodwa-ke, lapho umthamo uphezulu kakhulu, i-rheology yodaka ingase ibe nkulu kakhulu, ithinte ukusebenza kokwakhiwa. Ngakho-ke, umthamo ophelele we-HPMC udinga ukulungiswa ngokuya ngokusetshenziswa kwangempela.
2. Umthelela womthamo we-HPMC emandleni okubopha odaka lwegypsum
Amandla okubopha omunye ukusebenza okubalulekile kwe-gypsum mortar, okuthinta ngokuqondile ukunamathela phakathi kodaka nesisekelo. I-HPMC, njenge-polymer yamangqamuzana aphezulu, ingathuthukisa ukuhlangana nokusebenza okubophayo kodaka. Inani elifanele le-HPMC lingathuthukisa ukuhlangana kodaka, ukuze likwazi ukwakha ukunamathela okuqinile nodonga kanye ne-substrate ngesikhathi sokwakhiwa.
Ucwaningo lokuhlola lubonise ukuthi umthamo we-HPMC unomthelela omkhulu emandleni okubopha odaka. Uma umthamo we-HPMC ungaphakathi kwebanga elithile (ngokuvamile u-0.2% -0.6%), amandla okubopha abonisa ithrendi ekhuphukayo. Lokhu kungenxa yokuthi i-HPMC ingathuthukisa ipulasitiki yodaka, ukuze ilingane kangcono ne-substrate ngesikhathi sokwakhiwa futhi inciphise ukuchithwa nokuqhekeka. Kodwa-ke, uma umthamo uphezulu kakhulu, udaka lungase lube noketshezi ngokweqile, luthinte ukunamathela kwalo ku-substrate, ngaleyo ndlela lunciphise amandla okubopha.
3. Umthelela womthamo we-HPMC ekusebenzeni kwe-fluidity nokusebenza kokwakhiwa kwe-gypsum mortar
I-Fluidity iyinkomba yokusebenza ebaluleke kakhulu ohlelweni lokwakhiwa kwe-gypsum mortar, ikakhulukazi ekwakhiweni kodonga lwendawo enkulu. Ukwengezwa kwe-HPMC kungathuthukisa kakhulu ukugcwala kodaka, kwenze kube lula ukwakha nokusebenza. Izici zesakhiwo samangqamuzana e-HPMC ziyenza ikwazi ukukhulisa i-viscosity yodaka ngokujiya, ngaleyo ndlela ithuthukise ukusebenza nokusebenza kokwakhiwa kodaka.
Uma umthamo we-HPMC uphansi, uketshezi lodaka lubi, okungaholela ebunzimeni bokwakha ngisho nokuqhekeka. Inani elifanele lomthamo we-HPMC (ngokuvamile eliphakathi kuka-0.2% -0.6%) lingathuthukisa uketshezi lodaka, lithuthukise ukusebenza kwalo kokumboza kanye nomthelela wokushelela, futhi ngaleyo ndlela lithuthukise ukusebenza kahle kokwakhiwa. Kodwa-ke, uma umthamo uphezulu kakhulu, uketshezi lodaka luzoba ne-viscous kakhulu, inqubo yokwakha izoba nzima, futhi ingase iholele ekumoshweni kwezinto ezibonakalayo.
4. Umthelela womthamo we-HPMC ekomisweni kokuncipha kodaka lwegypsum
Ukomisa ukuncipha kungenye impahla ebalulekile ye-gypsum mortar. Ukuncipha ngokweqile kungase kubangele imifantu odongeni. Ukwengezwa kwe-HPMC kunganciphisa ngempumelelo ukushwabana okomisa kodaka. Ucwaningo luthole ukuthi inani elifanele le-HPMC linganciphisa ukuhwamuka okusheshayo kwamanzi, ngaleyo ndlela kwehlise inkinga yokuncipha okomisa kodaka lwegypsum. Ngaphezu kwalokho, isakhiwo samangqamuzana e-HPMC singakha isakhiwo senethiwekhi esizinzile, sithuthukise ukumelana nokuqhekeka kodaka.
Kodwa-ke, uma umthamo we-HPMC uphezulu kakhulu, ungabangela udaka ukusetha isikhathi eside, kuthinte ukusebenza kahle kokwakha. Ngesikhathi esifanayo, i-viscosity ephezulu ingabangela ukusabalalisa okungalingani kwamanzi ngesikhathi sokwakhiwa, okuthinta ukuthuthukiswa kokunciphisa.
5. Umphumela womthamo we-HPMC ekuphikiseni ukuqhekeka kwe-gypsum mortar
Ukumelana nokuqhekeka kuyinkomba ebalulekile yokuhlola ikhwalithi ye-gypsum mortar. I-HPMC ingathuthukisa ukumelana kwayo nokuqhekeka ngokuthuthukisa amandla acindezelayo, ukunamathela kanye nokuqina kodaka. Ngokungeza inani elifanele le-HPMC, ukumelana nokuqhekeka kwe-gypsum mortar kungathuthukiswa ngempumelelo ukuze kugwenywe ukuqhekeka okubangelwa amandla angaphandle noma ukushintsha kwezinga lokushisa.
Umthamo ophelele we-HPMC uvamise ukuba phakathi kuka-0.3% no-0.5%, ongathuthukisa ukuqina kwesakhiwo sodaka futhi unciphise imifantu ebangelwa umehluko wezinga lokushisa kanye nokuncipha. Kodwa-ke, uma umthamo uphezulu kakhulu, i-viscosity eyeqile ingase ibangele udaka lwelaphe kancane kakhulu, ngaleyo ndlela kuthinte ukumelana kwayo kokuqhekeka kukonke.
6. Ukwenza ngcono nokusebenzisa okungokoqobo komthamo we-HPMC
Kusukela ekuhlaziyweni kwezinkomba zokusebenza ezingenhla, umthamo weI-HPMCkunomthelela omkhulu ekusebenzeni kwe-gypsum mortar. Kodwa-ke, uhla lwemithamo olufanele luyinqubo yebhalansi, futhi umthamo uvame ukutuswa ukuthi ube ngu-0.2% kuya ku-0.6%. Izimo ezihlukene zokwakha kanye nezidingo zokusetshenziswa zingadinga ukulungiswa kumthamo ukuze kuzuzwe ukusebenza okungcono kakhulu. Ezisetshenziswa ezingokoqobo, ngaphezu komthamo we-HPMC, ezinye izici zidinga ukucatshangelwa, njengengxenye yodaka, izakhiwo ze-substrate, nezimo zokwakha.
Umthamo we-HPMC unomthelela omkhulu ekusebenzeni kwe-gypsum mortar. Inani elifanele le-HPMC lingathuthukisa ngempumelelo izakhiwo ezibalulekile zodaka njengokugcinwa kwamanzi, amandla okubopha, uketshezi, nokumelana nokuqhekeka. Ukulawulwa komthamo kufanele kucabangele ngokuphelele izidingo zokusebenza kokwakhiwa kanye namandla okugcina odaka. Isilinganiso se-HPMC esinengqondo asikwazi nje ukuthuthukisa ukusebenza kokwakhiwa kodaka, kodwa futhi sithuthukise ukusebenza kwesikhathi eside kodaka. Ngakho-ke, ekukhiqizweni nasekwakhiweni kwangempela, umthamo we-HPMC kufanele uthuthukiswe ngokwezidingo ezithile ukuze kuzuzwe umphumela omuhle kakhulu.
Isikhathi sokuthumela: Dec-16-2024