ʻO ka gypsum Desulfurization ka kinoea flue i hana ʻia e ka puhi ʻana o nā wahie i loaʻa ka sulfur (lanahu, petroleum), nā ʻōpala paʻa ʻoihana i hana ʻia i ka wā o ke kaʻina hana hoʻomaʻemaʻe desulfurization, a me ka gypsum hemihydrate (kemika CaSO4· 0.5H2O), ua like ka hana me ka gypsum hale kūlohelohe. No laila, nui aʻe nā noiʻi a me nā noi o ka hoʻohana ʻana i ka gypsum desulfurized ma kahi o ka gypsum kūlohelohe e hana i nā mea hoʻohālikelike ponoʻī. ʻO nā mea hoʻohui polymer organik e like me ka mea hoʻemi wai, ka mea paʻa wai a me ka retarder he mau mea hana koʻikoʻi i ka haku mele ʻana o nā mea mortar hoʻohālikelike ponoʻī. ʻO ka launa pū ʻana a me ke ʻano o nā mea ʻelua me nā mea cementitious he mau pilikia e pono ai ka nānā ʻana. Ma muli o nā ʻano o ke kaʻina hana hoʻokumu, he liʻiliʻi ka maikaʻi o ka gypsum desulfurized (ua hoʻolaha nui ʻia ka nui o ka ʻāpana ma waena o 40 a me 60 μm), a he kūpono ʻole ka gradation pauka, no laila he maikaʻi ʻole nā waiwai rheological o ka gypsum desulfurized, a ʻoi aku ka maʻalahi o ka slurry mortar i hoʻomākaukau ʻia e ia. Hoʻokaʻawale, stratification a me ke kahe ʻana o ke koko. ʻO ka cellulose ether ka mea hoʻohui i hoʻohana pinepine ʻia i ka mortar, a ʻo kona hoʻohana pū ʻana me ka mea hoʻemi wai he mea nui ia e hoʻokō ai i ka hana piha o nā mea hoʻohaʻahaʻa ponoʻī e pili ana i ka gypsum desulfurized e like me ka hana kūkulu hale a ma hope ka hana mechanical a me ka lōʻihi.
Ma kēia pepa, hoʻohana ʻia ka waiwai wai ma ke ʻano he kuhikuhi kaohi (kekelē pālahalaha 145 mm ± 5 mm), e kālele ana i ka hopena o ka ʻike o ka cellulose ether a me ke kaumaha molekala (waiwai viscosity) ma ka hoʻohana ʻana i ka wai o nā mea hoʻohaʻahaʻa ponoʻī i hoʻokumu ʻia i ka gypsum desulfurized, ka nalowale o ka wai i ka hala ʻana o ka manawa, a me ka coagulation. Ke kānāwai o ka mana o nā waiwai kumu e like me ka manawa a me nā waiwai mechanical mua; i ka manawa like, e hoʻāʻo i ke kānāwai o ka mana o ka cellulose ether ma ka hoʻokuʻu ʻana o ka wela a me ka wikiwiki o ka hoʻokuʻu ʻana o ka wela o ka hydration gypsum desulfurized, e kālailai i kona mana ma ke kaʻina hydration o ka gypsum desulfurized, a kūkākūkā mua i kēia ʻano admixture Hoʻohālikelike me ka ʻōnaehana gelling gypsum desulfurization.
1. Nā mea maka a me nā ʻano hoʻāʻo
1.1 Nā mea maka
Pauka Gypsum: pauka gypsum desulfurized i hana ʻia e kahi hui ma Tangshan, ʻo ka haku mele mineral nui ka hemihydrate gypsum, ua hōʻike ʻia kona haku mele kemika ma ka Papa 1, a ua hōʻike ʻia kona mau waiwai kino ma ka Papa 2.
kiʻi
kiʻi
ʻO nā mea hoʻohui i loko o: cellulose ether (hydroxypropyl methylcellulose, HPMC no ka pōkole); superplasticizer WR; defoamer B-1; EVA redispersible latex powder S-05, nā mea a pau i loaʻa ma ke kālepa.
ʻAggregate: one muliwai maoli, one maikaʻi i hana ponoʻī ʻia i kānana ʻia ma kahi kānana 0.6 mm.
1.2 ʻAno hoʻāʻo
ʻO ka gypsum desulfurization paʻa: one: wai = 1:0.5:0.45, ka nui kūpono o nā admixtures ʻē aʻe, fluidity e like me ka helu kuhikuhi kaohi (hoʻonui 145 mm ± 5 mm), ma ka hoʻoponopono ʻana i ka hoʻohana ʻana i ka wai, i hui pū ʻia me nā mea cementitious (desulfurization gypsum + Cement) 0, 0.5 ‰, 1.0 ‰, 2.0 ‰, 3.0 ‰ cellulose ether (HPMC-20,000); e hoʻopaʻa hou i ka nui o ka cellulose ether i 1 ‰, koho i nā HPMC-20,000, HPMC-40,000, HPMC-75,000, a me HPMC-100,000 hydroxypropyl methylcellulose ethers me nā kaumaha molekala like ʻole (ʻo nā helu like ʻo H2, H4, H7.5, a me H10), e aʻo i ka nui a me ke kaumaha molekala (ka waiwai viscosity) o ka cellulose ether. Ua kūkākūkā ʻia ka hopena o nā loli i nā waiwai o ka mortar leveling ponoʻī i hoʻokumu ʻia i ka gypsum, a me ka mana o nā mea ʻelua ma ke kahe, ka manawa hoʻonohonoho a me nā waiwai mechanical mua o ka hui mortar leveling ponoʻī gypsum desulfurized. Hoʻokō ʻia ke ʻano hoʻāʻo kikoʻī e like me nā koi o GB/T 17669.3-1999 "Hoʻoholo ʻana i nā waiwai Mechanical o ke kūkulu ʻana i ka Gypsum".
Hoʻokō ʻia ka hoʻāʻo wela o ka hydration me ka hoʻohana ʻana i kahi hāpana hakahaka o ka gypsum desulfurized a me nā hāpana me ka nui o ka cellulose ether o 0.5‰ a me 3‰, kēlā me kēia, a ʻo ka mea hana i hoʻohana ʻia he mea hoʻāʻo wela o ka hydration ʻano TA-AIR.
2. Nā hopena a me ka loiloi
2.1 Ka hopena o ka nui o ka cellulose ether ma nā waiwai kumu o ka mortar
Me ka hoʻonui ʻia ʻana o ka ʻike, ua hoʻomaikaʻi nui ʻia ka hana a me ke kuʻikahi o ka mortar, ua emi nui ka nalowale o ke kahe i ka hala ʻana o ka manawa, a ʻoi aku ka maikaʻi o ka hana kūkulu ʻana, a ʻaʻohe hanana delamination o ka mortar paʻakikī, a ua hoʻomaikaʻi nui ʻia ka laumania o ka ʻili, ka laumania a me ka nani. I ka manawa like, ua hoʻonui nui ʻia ka hoʻohana ʻana i ka wai o ka mortar e hoʻokō i ka wai like. Ma 5‰, ua hoʻonui ʻia ka hoʻohana ʻana i ka wai ma 102%, a ua hoʻolōʻihi ʻia ka manawa hoʻonohonoho hope loa ma 100 min, ʻo ia hoʻi he 2.5 mau manawa o ka laʻana hakahaka. Ua emi nui nā waiwai mechanical mua o ka mortar me ka hoʻonui ʻia ʻana o ka ʻike o ka cellulose ether. I ka wā i 5‰ ai ka ʻike o ka cellulose ether, ua emi ka ikaika flexural 24 h a me ka ikaika compressive i 18.75% a me 11.29% o ka laʻana hakahaka. ʻO ka ikaika compressive he 39.47% a me 23.45% o ka laʻana hakahaka. He mea kūpono ke hoʻomaopopo ʻana me ka piʻi ʻana o ka nui o ka mea paʻa wai, ua emi nui ka nui o ka mortar, mai 2069 kg/m3 ma 0 a i 1747 kg/m3 ma 5‰, he emi ʻana o 15.56%. E emi ana ka nui o ka mortar a piʻi ka porosity, ʻo ia kekahi o nā kumu no ka emi maopopo ʻana o nā waiwai mechanical o ka mortar.
He polymer non-ionic ka Cellulose ether. Hiki i nā hui hydroxyl ma ke kaulahao cellulose ether a me nā ʻātoma oxygen ma ka pilina ether ke hui pū me nā molekala wai e hana i nā pilina hydrogen, e hoʻohuli ana i ka wai manuahi i wai paʻa, a laila e pāʻani ana i kahi kuleana i ka paʻa ʻana o ka wai. Ma ke ʻano Macroscopic, ua hōʻike ʻia ʻo ia ma ke ʻano he hoʻonui ʻana i ke kūpaʻa o ka slurry [5]. ʻO ka hoʻonui ʻana i ka viscosity slurry ʻaʻole wale ia e hoʻonui i ka hoʻohana ʻana i ka wai, akā e hoʻopili ʻia ka cellulose ether i hoʻoheheʻe ʻia ma luna o ka ʻili o nā ʻāpana gypsum, e pale ana i ka hopena hydration a hoʻolōʻihi i ka manawa hoʻonohonoho; i ka wā o ke kaʻina hana hoʻoulu, e hoʻokomo pū ʻia ka nui o nā pehu ea. E hana ʻia nā hakahaka i ka wā e paʻakikī ai ka mortar, a laila e hōʻemi ana i ka ikaika o ka mortar. Ma ka noʻonoʻo piha ʻana i ka hoʻohana ʻana i ka wai unilateral o ka hui mortar, ka hana kūkulu, ka manawa hoʻonohonoho a me nā waiwai mechanical, a me ka lōʻihi ma hope, a me nā mea ʻē aʻe, ʻaʻole pono e ʻoi aku ka nui o ka cellulose ether i loko o ka mortar desulfurized gypsum-based self-leveling mortar ma mua o 1‰.
2.2 Ka hopena o ke kaumaha molekala o ka cellulose ether ma ka hana o ka mortar
ʻO ka maʻamau, ʻo ke kiʻekiʻe o ka viscosity a me ka ʻoi aku ka maikaʻi o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai a hoʻonui i ka ikaika o ka hoʻopaʻa ʻana. e hoʻopilikia maikaʻi ʻole ʻia ka hana. No laila, ua hoʻāʻo hou ʻia ka mana o nā cellulose ethers o nā kaumaha molekala like ʻole ma nā waiwai kumu o nā mea mortar leveling ponoʻī i hoʻokumu ʻia i ka gypsum. Ua piʻi aʻe ka noi wai o ka mortar i kekahi ʻano, akā ʻaʻohe hopena maopopo i ka manawa hoʻonohonoho a me ke kahe. I ka manawa like, ua hōʻike ka ikaika flexural a me ka compressive o ka mortar ma nā kūlana like ʻole i kahi ʻano i lalo, akā ʻoi aku ka emi ʻana ma mua o ka mana o ka ʻike cellulose ether ma nā waiwai mechanical. I ka hōʻuluʻulu manaʻo, ʻaʻohe hopena maopopo o ka hoʻonui ʻana i ke kaumaha molekala o ka cellulose ether i ka hana o nā hui mortar. Ke noʻonoʻo nei i ka maʻalahi o ke kūkulu ʻana, pono e koho ʻia ka cellulose ether haʻahaʻa-viscosity a me ke kaumaha molekala liʻiliʻi e like me nā mea hoʻohaʻahaʻa ponoʻī i hoʻokumu ʻia i ka gypsum desulfurized.
2.3 Hopena o ka cellulose ether ma ka wela o ka hydration o ka gypsum desulfurized
Me ka hoʻonui ʻia ʻana o ka nui o ka cellulose ether, ua emi mālie ka piko exothermic o ka hydration o ka gypsum desulfurized, a ua lohi iki ka manawa o ke kūlana kiʻekiʻe, ʻoiai ua emi ka wela exothermic o ka hydration, akā ʻaʻole maopopo. Hōʻike kēia e hiki i ka cellulose ether ke hoʻopaneʻe i ka nui o ka hydration a me ke kekelē hydration o ka gypsum desulfurized i kekahi ʻano, no laila ʻaʻole pono e nui loa ka dosage, a pono e hoʻomalu ʻia i loko o 1 ‰. Hiki ke ʻike ʻia ua hoʻopili ʻia ke kiʻi colloidal i hana ʻia ma hope o ka hui ʻana o ka cellulose ether me ka wai ma luna o ka ʻili o nā ʻāpana gypsum desulfurized, kahi e hoʻemi ai i ka nui o ka hydration o ka gypsum ma mua o 2 h. I ka manawa like, ʻo kona paʻa wai kū hoʻokahi a me nā hopena mānoanoa e hoʻopaneʻe i ka mahu ʻana o ka wai slurry a he mea maikaʻi ka Dissipation i ka hydration hou o ka gypsum desulfurized i ke kahua ma hope. I ka hōʻuluʻulu ʻana, i ka wā e hoʻomalu ʻia ai ka dosage kūpono, he palena ko ka cellulose ether i ka nui o ka hydration a me ke kekelē hydration o ka gypsum desulfurized ponoʻī. I ka manawa like, ʻo ka hoʻonui ʻia ʻana o ka ʻike cellulose ether a me ke kaumaha molekala e hoʻonui nui i ka viscosity o ka slurry a hōʻike i ka hana paʻa wai maikaʻi loa. I mea e hōʻoia ai i ka wai o ka mortar desulfurized gypsum self-leveling, e hoʻonui nui ʻia ka hoʻohana ʻana i ka wai, ʻo ia hoʻi ma muli o ka manawa hoʻonohonoho lōʻihi o ka mortar. ʻO ke kumu nui o ka emi ʻana o nā waiwai mechanical.
3. Hopena
(1) Ke hoʻohana ʻia ka wai ma ke ʻano he kuhikuhi kaohi, me ka hoʻonui ʻia o ka ʻike cellulose ether, ua hoʻolōʻihi nui ʻia ka manawa hoʻonohonoho o ka mortar desulfurized gypsum-based self-leveling mortar, a ua hoʻemi nui ʻia nā waiwai mechanical; i ka hoʻohālikelike ʻia me ka ʻike, ʻaʻole nui ka hopena o ka hoʻonui ʻana i nā waiwai o ka mortar i luna. Ma ka noʻonoʻo piha ʻana, pono e koho ʻia ka cellulose ether me kahi kaumaha molekala liʻiliʻi (ʻoi aku ka haʻahaʻa o ka viscosity ma mua o 20 000 Pa·s), a pono e hoʻomalu ʻia ka dosage i loko o 1‰ o ka mea sima.
(2) Hōʻike nā hopena hoʻāʻo o ka wela hydration o ka gypsum desulfurized i loko o ka laulā o kēia hoʻāʻo, he palena ko ka cellulose ether i ka helu hydration a me ke kaʻina hana hydration o ka gypsum desulfurized. ʻO ka hoʻonui ʻana o ka hoʻohana ʻana i ka wai a me ka emi ʻana o ka nui o ka nui nā kumu nui no ka emi ʻana o nā waiwai mechanical o ka mortar gypsum desulfurized.
Ka manawa hoʻouna: Mei-08-2023