ʻO ka gypsum Desulfurization kahi gypsum huahana ʻoihana i loaʻa ma ka desulfurizing a me ka hoʻomaʻemaʻe ʻana i ke kinoea flue i hana ʻia ma hope o ka puhi ʻana o ka wahie i loaʻa ka sulfur ma o ka lime maikaʻi a i ʻole ka slurry pauka limestone. ʻO kona ʻano kemika like me ko ka gypsum dihydrate kūlohelohe, ʻo CaSO4·2H2O ka mea nui. I kēia manawa, ʻo ke ʻano hana mana o koʻu ʻāina ke noho aliʻi nei e ka hana mana lanahu, a ʻo ka SO2 i hoʻopuka ʻia e ka lanahu i ke kaʻina hana o ka hana mana thermal e helu ana ma mua o 50% o nā hoʻokuʻu makahiki o koʻu ʻāina. ʻO ka nui o ka hoʻokuʻu ʻana o ka sulfur dioxide i hoʻoulu ai i ka haumia koʻikoʻi o ke kaiapuni. ʻO ka hoʻohana ʻana i ka ʻenehana desulfurization gas flue e hana i ka gypsum desulfurized he ana koʻikoʻi ia e hoʻoponopono ai i ka hoʻomohala ʻenehana o nā ʻoihana e pili ana i ka lanahu. Wahi a nā helu helu piha ʻole, ua ʻoi aku ka nui o ka hoʻokuʻu ʻana o ka gypsum desulfurized pulu ma koʻu ʻāina ma mua o 90 miliona t/a, a ʻo ke ʻano hana o ka gypsum desulfurized ua hoʻopili nui ʻia, ʻaʻole wale ia e noho ana i ka ʻāina, akā ke kumu hoʻi i ka hoʻonele nui ʻana i nā kumuwaiwai.
Loaʻa i ka Gypsum nā hana o ke kaumaha māmā, ka hoʻēmi ʻana i ka walaʻau, ka pale ʻana i ke ahi, ka pale ʻana i ka wela, a pēlā aku. Hiki ke hoʻohana ʻia i ka hana sima, ka hana ʻana i ka gypsum kūkulu, ka ʻenekinia hoʻonaninani a me nā ʻoihana ʻē aʻe. I kēia manawa, ua hana ka nui o nā kānaka akamai i ka noiʻi ʻana i ka plaster plaster. Hōʻike ka noiʻi he micro-expansion ka mea plaster plaster, hana maikaʻi a me ka plasticity, a hiki ke pani i nā mea plaster kuʻuna no ka hoʻonaninani paia o loko. Ua hōʻike nā haʻawina a Xu Jianjun a me nā mea ʻē aʻe e hiki ke hoʻohana ʻia ka gypsum desulfurized e hana i nā mea paia māmā. Ua hōʻike nā haʻawina a Ye Beihong a me nā mea ʻē aʻe e hiki ke hoʻohana ʻia ka gypsum plaster i hana ʻia e ka gypsum desulfurized no ka papa plastering o ka ʻaoʻao o loko o ka paia waho, ka paia ʻāpana o loko a me ke kaupaku, a hiki ke hoʻoponopono i nā pilikia maikaʻi maʻamau e like me ka pūpū a me ka haki ʻana o ka mortar plastering kuʻuna. ʻO ka gypsum plaster māmā kahi ʻano hou o ka mea plastering aloha kaiapuni. Hana ʻia ia me ka gypsum hemihydrate ma ke ʻano he mea cementitious nui ma ka hoʻohui ʻana i nā aggregates māmā a me nā admixtures. Ke hoʻohālikelike ʻia me nā mea plastering sima kuʻuna, ʻaʻole maʻalahi ka haki, ka hoʻopili ʻana. Nakinaki maikaʻi, shrinkage maikaʻi, ʻōmaʻomaʻo a me ka palekana kaiapuni. ʻO ka hoʻohana ʻana i ka gypsum desulfurized e hana i ka gypsum hemihydrate ʻaʻole wale ia e hoʻoponopono i ka pilikia o ka nele o nā kumuwaiwai gypsum hale kūlohelohe, akā ʻike pū kekahi i ka hoʻohana ʻana i nā kumuwaiwai o ka gypsum desulfurized a hoʻokō i ke kumu o ka pale ʻana i ke kaiapuni kaiaola. No laila, ma muli o ke aʻo ʻana o ka gypsum desulfurized, hoʻāʻo kēia pepa i ka manawa hoʻonohonoho, ka ikaika flexural a me ka ikaika Compressive, e aʻo i nā mea e pili ana i ka hana o ka mortar gypsum desulfurization plastering māmā, a hāʻawi i kahi kumu kumumanaʻo no ka hoʻomohala ʻana i ka mortar gypsum desulfurization plastering māmā.
1 hoʻokolohua
1.1 Nā mea maka
Pauka gypsum desulfurization: ʻO ka gypsum hemihydrate i hana ʻia a calcined ʻia e ka ʻenehana desulfurization kinoea flue, ua hōʻike ʻia kona mau waiwai kumu ma ka Papa 1. ʻO ka hui māmā: hoʻohana ʻia nā microbeads vitrified, a ua hōʻike ʻia kona mau waiwai kumu ma ka Papa 2. Ua hui ʻia nā microbeads vitrified ma nā ʻāpana o 4%, 8%, 12%, a me 16% e pili ana i ka lakio nui o ka mortar gypsum desulfurized plastered māmā.
Hoʻopale: E hoʻohana i ka sodium citrate, ka loiloi kemika reagent maʻemaʻe, ua hoʻokumu ʻia ka sodium citrate ma ka lakio kaumaha o ka plastering māmā desulfurization gypsum mortar, a ʻo ka lakio hui ʻana he 0, 0.1%, 0.2%, 0.3%.
ʻEtera cellulose: hoʻohana i ka hydroxypropyl methylcellulose (HPMC), ʻo ka viscosity he 400, ua hoʻokumu ʻia ʻo HPMC ma ka lakio kaumaha o ka mortar gypsum desulfurized plastered māmā, a ʻo ka lakio hui ʻana he 0, 0.1%, 0.2%, 0.4%.
1.2 ʻAno hoʻāʻo
ʻO ka hoʻohana ʻana i ka wai a me ka manawa hoʻonohonoho o ke kūlike maʻamau o ka gypsum desulfurized e pili ana iā GB/T17669.4-1999 "Hoʻoholo ʻana i nā ʻano kino o ka hale Gypsum Plaster", a ʻo ka manawa hoʻonohonoho o ka plastering māmā desulfurized gypsum mortar e pili ana iā GB/T 28627-2012 "Plastering Gypsum" i hoʻokō ʻia.
Hoʻokō ʻia ka ikaika flexural a me ka compressive o ka gypsum desulfurized e like me GB/T9776-2008 "Building Gypsum", a ua hoʻoheheʻe ʻia nā specimens me ka nui o 40mm × 40mm × 160mm, a ua ana ʻia ka ikaika 2h a me ka ikaika maloʻo. Hoʻokō ʻia ka ikaika flexural a me ka compressive o ka mortar gypsum desulfurized plastered māmā e like me GB/T 28627-2012 "Plastering Gypsum", a ua ana ʻia ka ikaika o ka hoʻōla kūlohelohe no 1d a me 28d.
2 Nā hopena a me ke kūkākūkā ʻana
2.1 Ka hopena o ka pauka gypsum ma nā waiwai mechanical o ka gypsum desulfurization plastering māmā
ʻO ka nui o ka pauka gypsum, ka pauka limestone a me ka ʻāwili māmā he 100%, a ʻo ka nui o ka ʻāwili māmā paʻa a me ka hui ʻana e mau ana ka loli. Ke 60%, 70%, 80%, a me 90% ka nui o ka pauka gypsum, ʻo ka desulfurization ka hopena o ka ikaika flexural a me ka compressive o ka mortar gypsum.
Hoʻonui ka ikaika flexural a me ka ikaika compressive o ka mortar gypsum desulfurized plastered māmā me ka makahiki, e hōʻike ana ua lawa ka hydration degree o ka gypsum me ka makahiki. Me ka hoʻonui ʻia ʻana o ka pauka gypsum desulfurized, ua hōʻike ka ikaika flexural a me ka ikaika compressive o ka gypsum plastering māmā i kahi ʻano piʻi holoʻokoʻa, akā ua liʻiliʻi ka piʻi ʻana, a ua maopopo loa ka ikaika compressive i nā lā 28. I ka makahiki 1d, ua piʻi ka ikaika flexural o ka pauka gypsum i hui pū ʻia me 90% ma 10.3% i hoʻohālikelike ʻia me ka pauka gypsum 60%, a ua piʻi ka ikaika compressive like ma 10.1%. I ka makahiki o 28, ua piʻi ka ikaika flexural o ka pauka gypsum i hui pū ʻia me 90% ma 8.8% i hoʻohālikelike ʻia me ka pauka gypsum i hui pū ʻia me 60%, a ua piʻi ka ikaika compressive like ma 2.6%. I ka hōʻuluʻulu ʻana, hiki ke hoʻoholo ʻia ʻo ka nui o ka pauka gypsum he hopena nui i ka ikaika flexural ma mua o ka ikaika compressive.
2.2 Hopena o ka nui o ka ʻāhui māmā ma nā waiwai mechanical o ka gypsum desulfurized plastered māmā
ʻO ka nui o ka pauka gypsum, ka pauka limestone a me ka aggregate māmā he 100%, a ʻo ka nui o ka pauka gypsum paʻa a me ka hui ʻana e mau ana. Ke 4%, 8%, 12%, a me 16% ka nui o nā microbeads vitrified, ʻo ka plaster māmā nā hopena o ka ikaika flexural a me ka compressive o ka mortar gypsum desulfurized.
I ka makahiki like, ua emi ka ikaika flexural a me ka ikaika compressive o ka mortar gypsum desulfurized plastered māmā me ka hoʻonui ʻia o ka nui o nā microbeads vitrified. ʻO kēia no ka mea ʻo ka hapa nui o nā microbeads vitrified he ʻano hakahaka i loko a he haʻahaʻa ko lākou ikaika ponoʻī, kahi e hōʻemi ai i ka ikaika flexural a me ka compressive o ka mortar gypsum plastering māmā. I ka makahiki 1d, ua emi ka ikaika flexural o ka pauka gypsum 16% ma 35.3% i hoʻohālikelike ʻia me ka pauka gypsum 4%, a ua emi ka ikaika compressive e like me 16.3%. I ka makahiki o 28 mau lā, ua emi ka ikaika flexural o ka pauka gypsum 16% ma 24.6% i hoʻohālikelike ʻia me ka pauka gypsum 4%, ʻoiai ua emi wale ka ikaika compressive e like me 6.0%. I ka hōʻuluʻulu ʻana, hiki ke hoʻoholo ʻia ʻoi aku ka nui o ka hopena o ka nui o nā microbeads vitrified ma ka ikaika flexural ma mua o ka ikaika compressive.
2.3 Ka hopena o ka ʻike retarder i ka manawa hoʻonohonoho o ka gypsum desulfurized plastered māmā
ʻO ka nui o ka pauka gypsum, ka pauka limestone a me ka ʻāwili māmā he 100%, a ʻo ka nui o ka pauka gypsum paʻa, ka pauka limestone, ka ʻāwili māmā a me ka cellulose ether e mau ana me ka loli ʻole. Ke 0, 0.1%, 0.2%, 0.3% ka nui o ka sodium citrate, ʻo ia ka manawa hoʻonohonoho o ka mortar gypsum desulfurized plastered māmā.
ʻO ka manawa hoʻonohonoho mua a me ka manawa hoʻonohonoho hope loa o ka mortar gypsum desulfurized plastered māmā e hoʻonui ʻia me ka hoʻonui ʻia o ka nui o ka sodium citrate, akā ʻo ka hoʻonui ʻia o ka manawa hoʻonohonoho he liʻiliʻi ia. Ke 0.3% ka nui o ka sodium citrate, hoʻolōʻihi ʻia ka manawa hoʻonohonoho mua he 28 min, a ua hoʻolōʻihi ʻia ka manawa hoʻonohonoho hope loa e 33 min. ʻO ka hoʻolōʻihi ʻia o ka manawa hoʻonohonoho ma muli paha o ka ʻili nui o ka gypsum desulfurized, hiki ke omo i ka retarder a puni nā ʻāpana gypsum, a laila e hōʻemi ana i ka helu hoʻoheheʻe ʻana o ka gypsum a me ka pale ʻana i ka crystallization o ka gypsum, e hopena ana i ka hiki ʻole o ka slurry gypsum ke hana i kahi ʻōnaehana kūkulu paʻa. E hoʻolōʻihi i ka manawa hoʻonohonoho o ka gypsum.
2.4 Hopena o ka ʻike cellulose ether ma nā waiwai mechanical o ka gypsum desulfurized plastered māmā
ʻO ka nui o ka pauka gypsum, ka pauka limestone a me ka ʻāwili māmā he 100%, a ʻo ka nui o ka pauka gypsum paʻa, ka pauka limestone, ka ʻāwili māmā a me ka mea hoʻōki e mau ana me ka ʻole o ka loli. Ke 0, 0.1%, 0.2% a me 0.4% ka nui o ka hydroxypropyl methylcellulose, ʻo ka hopena o ka ikaika flexural a me ka compressive o ka mortar gypsum desulfurized plastered māmā.
I ka makahiki 1d, ua piʻi mua ka ikaika flexural o ka mortar gypsum desulfurized plastered māmā a laila emi iho me ka piʻi ʻana o ka ʻike hydroxypropyl methylcellulose; i ka makahiki 28d, ua piʻi ka ikaika flexural o ka mortar gypsum desulfurized plastered māmā Me ka piʻi ʻana o ka ʻike o ka hydroxypropyl methylcellulose, ua hōʻike ka ikaika flexural i kahi ʻano o ka emi mua ʻana, a laila piʻi a laila emi iho. Ke 0.2% ka ʻike o ka hydroxypropyl methylcellulose, hiki i ka ikaika flexural i ka palena kiʻekiʻe, a ʻoi aku ma mua o ka ikaika like ke 0 ka ʻike o ka cellulose. Me ka nānā ʻole i ka makahiki o 1d a i ʻole 28d, emi ka ikaika compressive o ka mortar gypsum desulfurized plastered māmā me ka piʻi ʻana o ka ʻike hydroxypropyl methylcellulose, a ʻoi aku ka maopopo o ke ʻano o ka emi ʻana ma 28d. ʻO kēia no ka mea he hopena ka cellulose ether i ka paʻa ʻana o ka wai a me ka mānoanoa, a e piʻi ka koi wai no ke kūlike maʻamau me ka piʻi ʻana o ka ʻike cellulose ether, e hopena ana i ka piʻi ʻana o ka ratio wai-sima o ka slurry structure, a laila e hōʻemi ana i ka ikaika o ka gypsum specimen.
3 Hopena
(1) ʻOi aku ka lawa o ke kekelē hydration o ka gypsum desulfurized me ka makahiki. Me ka hoʻonui ʻia o ka nui o ka pauka gypsum desulfurized, ua hōʻike ka ikaika flexural a me ka compressive o ka gypsum plastering māmā i kahi ʻano piʻi holoʻokoʻa, akā ua liʻiliʻi ka piʻi ʻana.
(2) Me ka hoʻonui ʻia ʻana o ka nui o nā microbeads vitrified, e emi ana ka ikaika flexural a me ka ikaika compressive o ka mortar gypsum desulfurized plastered māmā, akā ʻoi aku ka hopena o ka nui o nā microbeads vitrified ma ka ikaika flexural ma mua o ka ikaika compressive.
(3) Me ka hoʻonui ʻia o ka nui o ka sodium citrate, ua hoʻolōʻihi ʻia ka manawa hoʻonohonoho mua a me ka manawa hoʻonohonoho hope loa o ka mortar gypsum desulfurized plastered māmā, akā i ka wā e liʻiliʻi ai ka nui o ka sodium citrate, ʻaʻole maopopo ka hopena i ka manawa hoʻonohonoho.
(4) Me ka hoʻonui ʻia o ka ʻike hydroxypropyl methylcellulose, emi iho ka ikaika compressive o ka mortar gypsum desulfurized plastered māmā, akā hōʻike ka ikaika flexural i kahi ʻano o ka hoʻonui mua ʻana a laila e emi ana ma 1d, a ma 28d Ua hōʻike ia i kahi ʻano o ka emi ʻana ma mua, a laila e hoʻonui ana a laila e emi ana.
Ka manawa hoʻouna: Pepeluali-02-2023