Ukususwa kwe-gypsurumization i-flue igesi ekhiqizwayo ekhiqizwa ngokuhlanganiswa kwama-sulfur aqukethe ama-suels (amalahle, ama-petroleum), imfucumfucu eqinile ye-gypsum (ifomula yefomula ye-hemihydrate (ChemicAm CASO4 0.5h2o), ukusebenza kuqhathaniswa nalokho ye-gypsum yokwakha yemvelo. Ngakho-ke, kukhona ocwaningweni nokwengeziwe kanye nokusetshenziswa kokusebenzisa i-gypsurur ehlekisayo esikhundleni se-gypsum yemvelo ukukhiqiza izinto zokwenza okuzimele. I-Organic Polymer Admixturetures efana nokunciphisa amanzi i-ejenti, i-ejenti yokugcina amanzi kanye ne-retarder iyizakhi ezibalulekile ezisebenzayo ekwakhiweni kwezinto zohlobo lokuzimela. Ukuxhumana kanye nemishini yale mibili ngezinto zokwenza kahle izinkinga ezifanele ukunakwa. Ngenxa yezimpawu zenqubo yokwakheka, ukubukelwa kwe-gypsurumid depysurized incane (usayizi wezinhlayiyana kusatshalaliswa kakhulu phakathi kwama-40 no-60 μm), futhi iziqu ze-gypsurum azinangqondo, ngakho-ke izimbali ze-gypsum zimpofu, kanye nodaka I-Slurry elungiselelwe yiwona ukuhlukaniswa okulula, ukuhlukaniswa kanye nokopha kwenzeka. I-Cellulose Ether yiyona ehlanganiswe kakhulu ngodaka, futhi ukusetshenziswa kwayo okuhlanganisiwe okune-ejenti yokunciphisa amanzi kuyisiqinisekiso esibalulekile sokuthola ukusebenza okuphelele kwezinto zokwakha ezenzelwe ukufuya kanye nokusebenza kwemishini yakamuva.
Kuleli phepha, kusetshenziswa inani lentengo ye-fluidity njengezinkomba zokulawula (ukusakaza i-degree 145 mm ± 5 mm), kugxile emphumeleni wokuqukethwe kwe-cellulose ether kanye nokusetshenziswa kwe-gerum-based ye-gerulfurizer Izinto ezisetshenziswayo, ukulahlekelwa uketshezi ngokuhamba kwesikhathi, kanye nokuncintisana nomthetho wethonya lezakhiwo eziyisisekelo ezifana nesikhathi kanye nezakhiwo zakuqala; Ngasikhathi sinye, avivinye umthetho wethonya le-cellulose ether ekukhishweni kokushisa kanye nokukhishwa kwe-hydyfurur hydration, futhi ekuqaleni axoxe ngalolu hlobo lokuhambisana kokuqamba ama-gypsurization gepsurization gepsurization gelling system .
1. Izinto zokusetshenziswa nezindlela zokuhlola
1.1 Izinto ezingavuthiwe
I-Gypsum Powder: I-Gypsurized ye-Gypsum Powder ekhiqizwa yinkampani eTangshan, ukwakheka okuyinhloko kwe-hemihydrate gypsum, ukwakheka kwawo kwamakhemikhali kukhonjisiwe kuThebula 1, futhi izakhiwo zalo ezibonakalayo zikhonjiswa kuThebula 2.
isithombe
isithombe
Ama-admixtures afaka: I-CelLose Ether (Hydroxypropyl Methylcellulose, HPMC ngamafuphi); I-Superplastizer WR; defombar b-1; I-EVA Redisperferible Latex Powder S-05, konke okutholakalayo okutholakalayo.
I-Aggregate: Isihlabathi soMfula wemvelo, isihlabathi esihle senze sazihlaziya nge-0.6 mm ngesihlungo.
1.2 Indlela yokuhlola
I-Gypsurum elungisiwe: Isihlabathi: Amanzi = 1: 0.5: 0.45, inani elifanelekile lamanye ama-admixtures (ukunwetshwa kwe-gyps), ngokuhlangene ne-gypsum + usimende ) 0, 0.5 ‰, 1.0 ‰, 2.0 ‰, 3.0 ‰ cellulose ether (HPMC-20,000); qhubeka nokulungisa umthamo we-cellulose ether kuya ku-1 ‰, khetha i-HPMC-20,000, HPMC-40,000, kanye ne-HPMC-100,000 Hydroxyproselyl, kanye ne-HPMC-100,000, kanye ne-H2, h7.5, ne-H10 ngokulandelana ), ukutadisha umthamo kanye nesisindo se-molecular (inani le-viscosity) le-cellulose ether umthelela wohlobo lwezakhiwo zodaka lwe-gypsum-based ukuzimela, kanye nethonya lalaba bobabili olwela, ukusetha izakhiwo zesikhathi sokuqala ze Ingxube kaDypsuring Deselfuring Selfer-Level-Welveling Mording kuxoxwa ngayo. Indlela ethile yokuhlola yenziwa ngokuya ngezidingo ze-GB / T 17669.3-1999 "Ukunqunywa kwezindawo zemishini zokwakha i-gypsum".
Ukushisa kweHydration Test kwenziwa kusetshenziswa isampula engenalutho ye-gypsurum namasampula ane-cellulose ether ye-0.5 ‰ no-3 ‰, ngokulandelana, futhi ithuluzi elisetshenzisiwe liwukushisa kohlobo lwe-hydration.
2. Imiphumela kanye nokuhlaziywa
2.1 Umphumela we-cellulose ether okuqukethwe kwizakhiwo eziyisisekelo zodaka
Ngokukhuphuka kokuqukethwe, ukusebenziseka kanye nokuhlangana kodaka kwathuthukiswa kakhulu, ukulahlekelwa uketshezi ngokuhamba kwesikhathi kuncishiswa kakhulu, futhi ukusebenza kwezokwakha kungcono kakhulu, futhi udaka lwezokwakha alunasikhalazo, nobushelelezi obunzima, bushelelezi, bushelelezi, Ubushelelezi nama-aesthetics bathuthuke kakhulu. Ngasikhathi sinye, ukusetshenziswa kwamanzi kodaka ukufezekisa ushukela ofanayo kukhuphuke kakhulu. Ku-5 ‰, ukusetshenziswa kwamanzi kwakhuphuka ngo-102%, futhi isikhathi sokugcina sokugcina sakhula isikhathi esiyi-100, okuyi-2,5 izikhathi zesampula engenalutho. Izakhiwo zemishini zokuqala zodaka zincipha kakhulu ngokwanda kokuqukethwe kwe-cellulose ether. Lapho okuqukethwe kwe-cellulose ether kwakungu-5 ‰, amandla aguquguqukayo angama-24 namandla acindezelayo anciphile ku-18.75% no-11.29% wesampula elingenalutho ngokulandelana. Amandla acindezelayo angama-39.47% no-23.45% wesampula elingenalutho ngokulandelana. Kuyaqapheleka lokho ngokwanda kwenani le-ejenti yokugcina amanzi, ubuningi obuningi bodaka bunciphise kakhulu, kusukela ngo-2069 kg / m3 kg / m3 ku-547 ku-15.56%. Ubukhulu bodaka buyancipha futhi i-porosion inyuka, okungenye yezizathu zokuncipha okusobala kwezindawo ezisetshenziswayo zodaka.
I-Cellulose Ether yi-polymer engeyona eye-ionic. Amaqembu e-hydroxyl e-cellulose ether chain kanye nama-athomu omoya-mpilo ku-ether Bond angahlangana nama-molecule wamanzi ukwakha ama-hydrogen bond, ngaleyo ndlela edlala indima ekugcinweni kwamanzi. I-Macroscopically ibonakala njengokwanda kokuhlangana kwama-slurry [5]. Ukwanda kwe-slurry viscosity ngeke kukhuphule ukusetshenziswa kwamanzi kuphela, kodwa futhi ne-cellulose ether ecijile kuzoba ama-adderbed ngaphezulu kwezinhlayiya ze-gypsum, ukuvimbela ukusabela kwe-hydration nokwandisa isikhathi sokusetha; Ngesikhathi senqubo evuthayo, kuzokwethulwa inani elikhulu lama-bubble amoya. Ama-voids azokwakha njengoba udaka lukhuni, ekugcineni lunciphisa amandla odaka. Ukucabangisisa ngokusetshenziswa kwamanzi okungaganiwe kwengxube kadaka, ukusebenza kwezokwakha, ukusetha isikhathi nezakhiwo zemishini, nokuqina kwesikhathi, njll.
2.2 Umphumela wesisindo se-molecular of cellulose ether ekusebenzeni kodaka
Imvamisa, ukukhuphuka kwe-viscosity kanye nokwenza kahle ubumsulwa be-cellulose ether, okungcono ukugcinwa kwamanzi futhi kwandise amandla okubopha. ukusebenza kuzothinteka kabi. Ngakho-ke, ithonya le-Cellulose I-Tellouther izinsimbi ezihlukene zamangqamuzana ezingxenyeni eziyisisekelo zezinto zohlobo lokuzimela ezisebenza ngokuzimela kwe-gypsum ziphinde zahlolwa. Ukufunwa kwamanzi kodaka kukhuphuke ngezinga elithile, kepha bekungenamphumela osobala ngesikhathi sokulungiselela kanye nobubi. Ngasikhathi sinye, amandla aguqukayo futhi acindezelayo odaka emazweni ahlukene akhombisa ukuthambekela kwehla, kepha ukwehla kwakungaphansi kakhulu kunethonya lokuqukethwe kwe-cellulose ether kwizakhiwo zemishini. Ngamafuphi, ukwanda kwesisindo se-molecular of cellulose ether akunamphumela osobala ekusebenzeni kwezingxube zodaka. Uma kucatshangelwa lula ukwakhiwa, okuvuselelwa kancane kanye ne-cellulose ye-cellulose ephansi kufanele kukhethwe njengezinto zokwakha ezisuselwa ku-gypsurum ezisuselwa ku-gypsurum.
2.3 Umphumela we-cellulose ether ekushiseni kwe-hydration ye-gypsururid depyfurized
Ngokukhuphuka kokuqukethwe kwe-cellulose ether, inani eliphakeme le-hydration ye-gypsuric ehlehlisiwe kancane kancane yehle kancane kancane, futhi isikhathi sesikhundla esiphakeme sabambezeleka kancane, kanti ukushisa okuphezulu kwe-hydration kwehliswa, kodwa hhayi ngokusobala. Lokhu kukhombisa ukuthi i-cellulose ether ingabambezela izinga le-hydration kanye ne-hydration degree ye-gypsurized gypsurud ngezinga elithile, ngakho-ke umthamo akufanele ube mkhulu kakhulu, futhi kufanele alawulwe ngaphakathi kwe-1 ‰. Kungabonakala ukuthi ifilimu ye-colloidal yakhiwa ngemuva kokuhlangana kwama-cellulose ether ihlangana nama-adsorbed ebusweni bezinhlayiya ze-gypsurum ezisusiwe, ezinciphisa izinga le-hypsum ngaphambi kwe-2 h. Ngasikhathi sinye, ukugcinwa kwayo okuhlukile kanye nemiphumela yokuqina kubambezele ukuhwamuka kwamanzi okushibilika kanye nokuhlakazeka kuyazuzisa ama-hydration angeziwe we-gypsurum esetshenziselwe kamuva. Ukufingqa, lapho umthamo ofanele ulawulwa, i-cellulose ether inethonya elilinganiselwe emazingeni e-hydration kanye ne-hydration degree of gypsum ngokwayo. Ngasikhathi sinye, ukwanda kokuqukethwe kwe-cellulose ether kanye nesisindo se-molecular kuzokhulisa kakhulu ukubonakala kwe-slurry futhi kuboniswe ukusebenza okuhle kakhulu kokugcina amanzi. Ukuze uqinisekise ukufutheka kodaka lwe-gypsuring self-leal-weselsed, ukusetshenziswa kwamanzi kuzokhuphuka kakhulu, okubangelwa isikhathi eside sokubeka udaka. Isizathu esiyinhloko sokuncipha kwezimpahla zemishini.
3. Isiphetho
. Uma kuqhathaniswa nokuqukethwe, isisindo samangqamuzana e-cellulose ether ukukhuphuka kunomthelela omncane kulezi zindawo ezingenhla zodaka. Ngokucabanga ngokufanele, i-cellulose ether kufanele ikhethwe ngesisindo esincane samangqamuzana (inani le-viscosity eliphansi kunama-20 000 ama-pay
. Ukwanda kokusetshenziswa kwamanzi kanye nokuncipha kobuningi ngobuningi yizizathu eziphambili zokwehla kwezindawo zemishini zodaka olususelwa e-gypsuri osuselwa e-gypsuri osusuli.
Isikhathi sePosi: Meyi-08-2023