Hoʻololi ʻia ʻo Cellulose Etera Viscosity ma luna o ka plaster sima

ʻO ka mānoanoa he hopena hoʻololi koʻikoʻi o ka cellulose ether ma luna o nā mea hoʻokumu sima. Nā hopena o ka maʻiʻo cellulose ether, ka wikiwiki o ka huli ʻana o ka viscometer a me ka mahana ma ka hoʻololi viscosity o cellulose ether i hoʻololi ʻia.plaster based ua aʻo ʻia. Hōʻike nā hopena i ka viscosity o ka simaplaster based piʻi mau me ka piʻi ʻana o ka ʻike o ka cellulose ether, a me ka viscosity o ka cellulose ether solution a me ka sima.plaster based loaʻa i ka "composite superposition effect"; ka pseudoplasticity o cellulose ether hoʻololi simaplaster based ʻoi aku ka haʻahaʻa ma mua o ka sima maʻemaʻeplaster based, a me ka viscosity ʻO ka haʻahaʻa o ka māmā holo o ka mea kani, a i ʻole ka haʻahaʻa o ka viscosity o cellulose ether i hoʻololi ʻia.plaster based, a i ʻole ka haʻahaʻa o ka maʻiʻo o ka cellulose ether, ʻoi aku ka maopopo o ka pseudoplasticity o ka cellulose ether i hoʻololi ʻia.plaster based; Me ka hopena hui o ka hydration, ka viscosity o cellulose ether i hoʻololi ʻiaplaster based e mahuahua a emi mai paha. Loaʻa nā ʻano like ʻole o ka cellulose ether i nā loli like ʻole i ka viscosity o ka sima i hoʻololi ʻiaplaster based.

Hua'ōlelo nui: cellulose ether; simaplaster based; viscosity

0、Olelo mua

Hoʻohana pinepine ʻia nā cellulose ethers ma ke ʻano he mau mea mālama wai a me nā mea mānoanoa no nā mea hana sima. E like me nā mea hoʻololi like ʻole, ʻo nā cellulose ethers i hoʻohana ʻia i nā mea i hoʻokumu ʻia i ka sima ma ke ʻano he methyl cellulose (MC), hydroxyethyl cellulose (HEC), hydroxyethyl methyl cellulose Ether (Hydroxyethyl methyl cellulose, HEMC) a me ka hydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, HPMC), ma waena o ia HPMC a me HEMC ka mea maʻamau i hoʻohana ʻia.

ʻO ka mānoanoa he hopena hoʻololi koʻikoʻi o ka cellulose ether ma luna o nā mea hoʻokumu sima. Hiki i ka cellulose ether ke hāʻawi i ka mortar pulu me ka viscosity maikaʻi loa, e hoʻonui nui i ka hiki ke hoʻopaʻa ʻia ma waena o ka mortar pulu a me ka papa kumu, a hoʻomaikaʻi i ka hana anti-sag o ka mortar. Hiki iā ia ke hoʻonui i ka homogeneity a me ka anti-dispersion hiki o nā mea i hoʻohui ʻia i ka ciment-based, a pale i ka delamination, segregation a me ke kahe ʻana o ka mortar a me ka pā.

Hiki ke loiloi nui ʻia ka hopena mānoanoa o ka cellulose ether ma nā mea i hoʻokumu ʻia i ka sima. Manaʻo mau ʻia nā mea hana sima he wai Bingham, ʻo ia hoʻi, inā ʻoi aku ka liʻiliʻi o ke koʻikoʻi shear i hoʻohana ʻia r ma mua o ke koʻikoʻi hua r0, e mau ana ka mea i kona ʻano kumu a ʻaʻole kahe; ke ʻoi aku ka ʻoi aku o ke koʻikoʻi koʻikoʻi r ma mua o ke koʻikoʻi hoʻohua r0, e hoʻololi ʻia ke kahe ʻana o ka mea, a me ke koʻikoʻi ʻāwili ʻO ke koʻikoʻi r he pilina laina me ka laiki y, ʻo ia hoʻi, r=r0+f·y, ma kahi o ka f ka viscosity plastic. Hoʻonui maʻamau ka cellulose ethers i ke koʻikoʻi o ka hoʻoulu ʻana a me ka viscosity plastic o nā mea i hoʻokumu ʻia i ka sima, akā naʻe, ʻo nā mea haʻahaʻa haʻahaʻa e alakaʻi i ka haʻahaʻa haʻahaʻa haʻahaʻa a me ka viscosity plastic, ma muli o ka hopena o ka ea o ka cellulose ethers. Hōʻike ka noiʻi ʻo Patural i ka piʻi ʻana o ke kaumaha o ka cellulose ether, ʻo ke koʻikoʻi o ka sima.plaster based e emi ana, a mahuahua ke kulike.

ʻO ka viscosity o ka simaplaster based He helu helu koʻikoʻi ia no ka loiloi ʻana i ka hopena mānoanoa o ka cellulose ether ma luna o nā mea hana sima. Ua ʻimi kekahi mau puke moʻolelo i ke kānāwai hoʻololi viscosity o ka solution cellulose ether, akā aia nō ka nele o ka noiʻi kūpono e pili ana i ka hopena o ka cellulose ether ma ka hoʻololi viscosity o ka sima.plaster based. I ka manawa like, e like me nā ʻano like ʻole o nā substituents, he nui nā ʻano cellulose ethers. ʻO ka hopena o nā ʻano like ʻole a me nā viscosities o cellulose ethers i ka hoʻololi ʻana o ka simaplaster based ʻO ka viscosity kekahi pilikia nui i ka hoʻohana ʻana i nā cellulose ethers. Ke hoʻohana nei kēia hana i ka viscometer rotational e aʻo i nā loli viscosity o cellulose ether modified cement slurries o nā ʻano like ʻole a me nā viscosities ma lalo o nā ratio poly-ash like ʻole, ka wikiwiki o ka rotational a me nā mahana.

1. Hoao

1.1 Mea maka

(1) Cellulose ether. ʻEono ʻano cellulose ethers i hoʻohana mau ʻia ma koʻu ʻāina i koho ʻia, me 1 ʻano MC, 1 ʻano HEC, 2 ʻano HPMC a me 2 mau ʻano HEMC, i waena o nā ʻano viscosities o 2 mau ʻano HPMC a me 2 mau ʻano HEMC ua maopopo. ʻokoʻa. Ua hoʻāʻo ʻia ka viscosity o ka cellulose ether e NDJ-1B rotational viscometer (Shanghai Changji Company), ʻo 1.0% a i ʻole 2.0% ka nui o ka hoʻonā ʻana, ʻo 20 ka mahana.°C, a he 12r/min ka māmā holo.

(2) Sima. ʻO ka sima Portland maʻamau i hana ʻia e Wuhan Huaxin Cement Co., Ltd. he kikoʻī o P·O 42.5 (GB 175-2007).

1.2 Ana ʻano viscosity o ka solution cellulose ether

E lawe i kahi laʻana cellulose ether o ka maikaʻi i ʻōlelo ʻia a hoʻohui ʻia i loko o kahi ipu aniani 250mL, a laila hoʻohui i 250g wai wela ma kahi o 90.°C; e hoʻoulu piha me ke koʻokoʻo aniani e hana i ka cellulose ether i kahi ʻōnaehana dispersion like i loko o ka wai wela, a ma ka manawa like e hoʻokomo i ka beaker Cool i ka lewa. Ke hoʻomaka ka hāʻina e hoʻoulu i ka viscosity a ʻaʻole e kahe hou, e kāpae koke i ka hoʻoulu ʻana; i ka wā e maʻalili ai ka hopena i ka lewa a hiki i ka like ʻana o ka waihoʻoluʻu, e hoʻokomo i ka beaker i loko o kahi ʻauʻau wai wela mau, a mālama i ka mahana i ka wela i ʻōlelo ʻia. ʻO ka hewa± 0.1°C; ma hope o 2h (helu ʻia mai ka manawa pili o cellulose ether me ka wai wela), e ana i ka mahana o ke kikowaena o ka hopena me kahi thermometer. Hoʻokomo) rotor i loko o ka hopena i ka hohonu i ʻōlelo ʻia, ma hope o ke kū ʻana no 5min, e ana i kona viscosity.

1.3 Ana viscosity o cellulose ether hoʻololi simaplaster based

Ma mua o ka hoʻokolohua, e mālama i nā mea maka a pau i ka mahana i ʻōlelo ʻia, e kaupaona i ka nui o ka cellulose etera a me ka sima, e hui pono iā lākou, a hoʻohui i ka wai piula wai i ka wela i ʻōlelo ʻia i loko o ka beaker aniani 250mL me ka ratio wai-cement o 0.65; a laila e hoʻokomo i ka pauda maloʻo i loko o ka beaker a kali no 3 mau minuke E hoʻoulu maikaʻi me ke koʻokoʻo aniani no 300 mau manawa, e hoʻokomo i ka rotor o kahi viscometer rotational (ʻano NDJ-1B, i hana ʻia e Shanghai Changji Geological Instrument Co., Ltd.) i loko o ka pahu. hoʻonā i kahi hohonu i kuhikuhi ʻia, a ana i kona viscosity ma hope o ke kū ʻana no 2 mau minuke. I mea e pale aku ai i ka hopena o ka wela hydration sima ma ka hoao viscosity o ka simaplaster based e like me ka hiki, ka viscosity o cellulose ether hoʻololi simaplaster based Pono e ho'āʻo i ka wā e pili ai ka sima me ka wai no 5 mau minuke.

2. Nā hopena a me ka nānā ʻana

2.1 Ka hopena o ka maʻiʻo cellulose ether

ʻO ka nui o ka cellulose ether maanei e pili ana i ka lakio nui o ka cellulose ether i ka sima, ʻo ia hoʻi, ka ratio polyash. Mai ka hopena o P2, E2 a me H1 ʻekolu ʻano cellulose ethers ma ka hoʻololi viscosity o ka sima.plaster based ma nā ʻano like ʻole (0.1%, 0.3%, 0.6% a me 0.9%), hiki ke ʻike ʻia ma hope o ka hoʻohui ʻana i ka cellulose ether, ka viscosity o ka sima.plaster based Piʻi ka viscosity; i ka piʻi ʻana o ka cellulose ether, ka viscosity o ka simaplaster based piʻi mau, a me ka laulā o ka hoʻonui i ka viscosity o ka simaplaster based nui aʻe.

Ke 0.65 ka nui o ka wai-cement a me ka helu cellulose ether he 0.6%, e noʻonoʻo ana i ka wai i hoʻopau ʻia e ka hydration mua o ka sima, ʻo ka nui o ka cellulose ether pili i ka wai ma kahi o 1%. Inā he 1% ka hoʻopaʻa ʻana, ʻo ka P2, E2 a me H1 wai wai ʻO nā viscosities he 4990mPa·S, 5070mPa·S a me 5250mPa·s pakahi; ke 0.65 ka lakio wai-kima, ka viscosity o ka sima maemaeplaster based he 836 mPa·S. Eia naʻe, ʻo nā viscosities o P2, E2 a me H1 ʻekolu cellulose etera i hoʻololi ʻia nā slurries sima he 13800mPa·S, 12900mPa·S a me 12700mPa·s pakahi. ʻIke loa, ʻo ka viscosity o cellulose ether i hoʻololi ʻiaplaster based ʻaʻole ia ka viscosity o ka cellulose ether solution a ʻO ka hoʻohui maʻalahi o ka viscosity o ka sima maʻemaʻe.plaster based ʻoi aku ka nui ma mua o ka huina o nā viscosities ʻelua, ʻo ia hoʻi, ka viscosity o ka solution cellulose ether a me ka viscosity o ka sima.plaster based loaʻa kahi "hopena superposition composite". ʻO ka viscosity o ka cellulose ether solution mai ka hydrophilicity ikaika o nā pūʻulu hydroxyl a me nā paʻa etera i loko o nā molekele cellulose ether a me ka hoʻolālā pūnaewele ʻekolu-dimensional i hoʻokumu ʻia e nā molekala eter cellulose i ka hopena; ka viscosity o ka sima maemaeplaster based mai ka pūnaewele i hoʻokumu ʻia ma waena o ka hoʻolālā huahana hydration. No ka mea, hoʻokumu pinepine ka polymer a me ka cement hydration i kahi ʻōnaehana interpenetrating network, i loko o ka cellulose ether i hoʻololi ʻia.plaster based, Hoʻopili ʻia ka ʻōnaehana ʻekolu-dimensional o cellulose ether a me ka ʻōnaehana o nā huahana hydration cement, a me nā molekole cellulose ether Adsorption me nā huahana hydration cement e hoʻopuka i kahi "composite superposition effect", e hoʻonui nui i ka viscosity holoʻokoʻa o ka sima.plaster based; no ka mea, hiki i hoʻokahi mole mole eter cellulose ke hoʻopili me nā molekele cellulose ether a me nā huahana hydration sima, no laila, me ka hoʻonui ʻana o ka ʻike o ka cellulose ether, ʻoi aku ka nui o ka nui o ka ʻoihana pūnaewele ma mua o ka piʻi ʻana o nā molekole cellulose ether, a me ka viscosity o ka sima.plaster based piʻi mau; Eia kekahi, pono ka hydration wikiwiki o ka sima e hana i kahi hapa o ka wai. , ka mea e like me ka hoʻonui ʻana i ka ʻike o ka cellulose ether, ʻo ia hoʻi ke kumu o ka piʻi nui ʻana o ka viscosity o ka sima.plaster based.

Mai ka cellulose ether a me ka simaplaster based loaʻa i ka "composite superposition effect" i ka viscosity, ma lalo o ka cellulose ether content a me ka wai-cement ratio, ka viscosity o cellulose ether i hoʻololi ʻia.plaster based me ka ʻokoʻa ʻike inā he 2% ka ʻokoʻa viscosity ʻaʻole nui, no ka laʻana, ʻo nā viscosities o P2 a me E2 he 48000mPa·s a me 36700mPa·s i loko o ka hoʻonā wai me ka hoʻopaʻa ʻana o 2%. S, ʻaʻole maopopo ka ʻokoʻa; ʻO nā viscosities o E1 a me E2 i loko o 2% wai wai he 12300mPa·S a me 36700mPa·s kēlā me kēia, he nui loa ka ʻokoʻa, akā ʻo ka viscosities o kā lākou paʻi sima i hoʻololi ʻia he 9800mPa·S a me 12900mPa pakahi·S, ua emi loa ka ʻokoʻa, no laila ke koho ʻana i ka cellulose ether i ka ʻenekinia, ʻaʻole pono e hahai i ka viscosity cellulose ether kiʻekiʻe. Eia kekahi, i nā noi ʻenekinia hana, ʻoi aku ka haʻahaʻa o ka neʻe ʻana o ka cellulose ether e pili ana i ka wai. No ka laʻana, i ka mortar plastering maʻamau, ʻo ka ratio wai-cement maʻamau ma kahi o 0.65, a ʻo ka ʻike o ka cellulose ether he 0.2% a 0.6%. ʻO ka nui o ka wai ma waena o 0.3% a me 1%.

Hiki ke ʻike ʻia mai nā hopena hoʻāʻo i nā ʻano like ʻole o ka cellulose ethers i nā hopena like ʻole i ka viscosity o ka sima.plaster based. I ka wā he 1% ka hoʻopaʻa ʻana, ʻo ka viscosities o P2, E2 a me H1 ʻekolu ʻano o ka cellulose ether aqueous solutions he 4990mPa·s, 5070mPa·S a me 5250mPa·S i kēlā me kēia, ʻo ka viscosity o ka solution H1 ka mea kiʻekiʻe loa, akā ʻo ka viscosity o P2, E2 a me H1 ʻekolu ʻano cellulose ether ʻO nā viscosity o nā slurries ciment i hoʻololi ʻia eter he 13800mPa.·S, 12900mPa·S a me 12700mPa·S i kēlā me kēia, a ʻo ka viscosity o nā slurries sima i hoʻololi ʻia ʻo H1 ka haʻahaʻa loa. ʻO kēia no ka mea maʻamau ka hopena o ka cellulose ethers i ka hoʻopaneʻe ʻana i ka hydration cement. Ma waena o nā ʻano ʻekolu o ka cellulose ethers, HEC, HPMC a me HEMC, HEC ka mea ikaika loa e hoʻopaneʻe i ka hydration cement. No laila, i ka H1 hoʻololi simaplaster based, ma muli o ka lohi o ka hoʻoheheʻe ʻana i ka cement, ʻoi aku ka lohi o ka ʻoihana pūnaewele o nā huahana hydration cement, a ʻo ka viscosity ka haʻahaʻa.

2.2 Ka hopena o ka hoʻololi ʻana

Mai ka hopena o ka wikiwiki o ka viscometer i ka viscosity o ka sima maʻemaʻeplaster based a me ka cellulose etera i hoʻololi ʻiaplaster based, hiki ke ʻike ʻia i ka piʻi ʻana o ka wikiwiki o ka rotation, ʻo ka viscosity o cellulose ether i hoʻololi ʻia.plaster based a me ka sima maemaeplaster based e emi ana i nā degere like 'ole, 'o ia ho'i, loa'a iā lākou ka waiwai o ka shear thinning a no ka wai pseudoplastic. ʻO ka liʻiliʻi o ka hoʻololi ʻana, ʻoi aku ka nui o ka emi ʻana o ka viscosity o nā sima a pauplaster based me ka nui o ka rotation, ʻo ia hoʻi, ʻoi aku ka maopopo o ka pseudoplasticity o ka simaplaster based. Me ka piʻi ʻana o ka nui o ka rotation, e emi ana ka pihi o ka viscosity o ka simaplaster based lilo mālie, a nāwaliwali ka pseudoplasticity. Hoʻohālikelike ʻia me ka sima maʻemaʻeplaster based, ka pseudoplasticity o cellulose ether i hoʻololi ʻiaplaster based ʻoi aku ka nāwaliwali, ʻo ia hoʻi, ʻo ka hoʻohui ʻana o ka cellulose ether e hōʻemi i ka pseudoplasticity o ka sima.plaster based.

Mai ka hopena o ka wikiwiki o ka huli ʻana i ka viscosity o ka simaplaster based ma lalo o nā ʻano like ʻole cellulose ether a me nā viscosities, hiki ke ʻike ʻia ʻo ka simaplaster based i hoʻololi ʻia me nā cellulose ethers ʻokoʻa ka ikaika pseudoplastic, a ʻo ka liʻiliʻi o ka viscosity o cellulose ether, ʻoi aku ka kiʻekiʻe o ka viscosity o ka sima i hoʻololi ʻia.plaster based. ʻOi aku ka maopopo o ka pseudoplasticity o ka simaplaster based ʻo ia; ka pseudoplasticity o ka sima i hoʻololi ʻiaplaster based ʻAʻohe ʻokoʻa ʻokoʻa me nā ʻano cellulose ethers me nā viscosities like. Mai P2, E2 a me H1 ʻekolu ʻano o ka cellulose etera i hoʻololi ʻiaplaster based ma nā ʻano like ʻole (0.1%, 0.3%, 0.6% a me 0.9%), hiki ke ʻike ʻia ka hopena o ka wikiwiki o ka rotation i ka viscosity, P2, E2 a me H1 ʻekolu mau ʻano fiber ʻO nā slurries sima i hoʻololi ʻia me ka ether maʻalahi loaʻa nā hopena hōʻike like. : ke okoa ka nui o ka cellulose ether, okoa ko lakou pseudoplasticity. ʻOi aku ka liʻiliʻi o ka cellulose ether, ʻoi aku ka ikaika o ka pseudoplasticity o ka sima i hoʻololi ʻia.plaster based.

Ma hope o ka hoʻopili ʻana o ka sima me ka wai, ua hoʻomaʻemaʻe koke ʻia nā ʻāpana sima ma luna o ka ʻili, a ʻo nā huahana hydration (ʻoi aku ka CSH gel) e hoʻokumu i kahi hoʻolālā agglomeration. I ka loaʻa ʻana o ka ikaika ʻāʻī kuhikuhi i loko o ka hoʻonā, e wehe ʻia ka ʻōnaehana agglomeration, no laila ma ke ala o ka ikaika shear Hoʻemi ʻia ke kūpaʻa ʻana o ke kahe kuhikuhi, a laila e hōʻike ana i ka waiwai o ka shear thinning. ʻO ka cellulose ether kahi ʻano macromolecule me kahi ʻano asymmetric. Ke hoʻomau ka hopena, hiki i nā molekole cellulose ether ke loaʻa nā ʻano ʻano like ʻole. I ka loaʻa ʻana o ka ikaika ʻāhi kuhikuhi i loko o ka hoʻonā, e huli ke kaulahao lōʻihi o ka mole a hele. Hoʻemi ʻia ka ʻaoʻao o ka ikaika shear, ka hopena i ka emi ʻana o ke kahe ʻana, a hōʻike pū i ka waiwai o ka shear thinning. Ke hoʻohālikelike ʻia me nā huahana hydration cement, ʻoi aku ka maʻalahi o nā molekole cellulose ether a loaʻa iā ia kahi mana buffering no ka ikaika shear. No laila, hoʻohālikelike ʻia me ka sima maʻemaʻeplaster based, ka pseudoplasticity o cellulose ether i hoʻololi ʻiaplaster based ʻoi aku ka nāwaliwali, a, i ka piʻi ʻana o ka viscosity a i ʻole maʻiʻo o ka cellulose ether, ʻoi aku ka maopopo o ka hopena hoʻopaʻa ʻana o nā molekole cellulose ether ma ka ikaika shear. Nawaliwali ka plasticity.

2.3 Ka hopena o ka wela

Mai ka hopena o nā loli wela (20°C, 27°C a me 35°C) ma ka viscosity o ka cellulose ether hoʻololi simaplaster based, hiki ke ʻike ʻia inā he 0.6% ka nui o ka cellulose ether, i ka piʻi ʻana o ka mahana, ʻo ka sima maʻemaʻe.plaster based a me M1 Ka viscosity o ka sima i hoololiiaplaster based hoʻonui, a me ka viscosity o nā cellulose ether i hoʻololi ʻiaplaster based ua emi, akā, ʻaʻole nui ka emi ʻana, a ʻo ka viscosity o ka H1 i hoʻololi ʻiaplaster based emi loa. E like me ka E2 hoʻololi simaplaster based pili, i ka polyash ratio he 0.6%, ka viscosity o ka simaplaster based e emi ana me ka piʻi ʻana o ka mahana, a inā ʻo ka ratio polyash he 0.3%, ʻo ka viscosity o ka sima.plaster based piʻi me ka piʻi ʻana o ka mahana.

ʻO ka ʻōlelo maʻamau, ma muli o ka emi ʻana o ka ikaika intermolecular intermolecular, e emi ka viscosity o ka wai me ka piʻi ʻana o ka mahana, ʻo ia ka hihia no ka cellulose ether solution. Eia naʻe, i ka piʻi ʻana o ka mahana, a piʻi ka manawa pili ma waena o ka sima a me ka wai, e hoʻonui nui ʻia ka wikiwiki o ka hydration sima, a e hoʻonui ʻia ke degere o ka hydration, no laila ka viscosity o ka sima maʻemaʻe.plaster based e mahuahua ana.

I loko o ka cellulose ether i hoʻololi ʻiaplaster based, E hoʻopili ʻia ka cellulose ether i ka ʻili o nā huahana hydration cement, no laila ke kāohi nei i ka hydration cement, akā ʻokoʻa nā ʻano like ʻole a me ka nui o nā cellulose ethers i nā mana like ʻole e kāohi ai i ka hydration cement, MC (e like me M1) he nāwaliwali hiki ke kāohi i ka hydration cement, a i ka piʻi ʻana o ka mahana, ʻo ka hydration rate o ka simaplaster based ʻoi aku ka wikiwiki, no laila, i ka piʻi ʻana o ka mahana, hoʻonui ʻia ka viscosity; Hiki i ka HEC, HPMC a me HEMC ke pale nui i ka hydration cement, i ka piʻi ʻana o ka mahana, ka hydration rate o ka sima.plaster based ʻoi aku ka lohi, no laila ke piʻi aʻe ka mahana, HEC, HPMC a me HEMC hoʻololi sima ʻO ka viscosity oplaster based (0.6% polyash ratio) ua ho'ēmi 'ia, a no ka mea hiki i ka HEC ke hoʻopaneʻe i ka hydration sima ma mua o ka HPMC a me HEMC, ka hoʻololi o ka cellulose ether i nā hoʻololi wela (20°C, 27°C a me 35°C) Ka viscosity o H1 hoʻololi simaplaster based emi loa me ka piʻi ʻana o ka mahana. Eia nō naʻe, ke noho mau nei ka hydration sima ke kiʻekiʻe ka mahana, no laila ke kiʻekiʻe o ka emi ʻana o ka cellulose ether i hoʻololi ʻia.plaster based me ka piʻi ʻana o ka mahana ʻaʻole maopopo. E like me ka E2 hoʻololi simaplaster based ke hopohopo nei, ke kiʻekiʻe ka dosage (ʻo ka ratio lehu he 0.6%), ʻike ʻia ka hopena o ka inhibiting cement hydration, a emi ka viscosity me ka piʻi ʻana o ka mahana; ke haʻahaʻa ka dosage (ʻo ka ratio lehu he 0.3%) ), ʻaʻole maopopo ka hopena o ka pale ʻana i ka hydration cement, a piʻi ka viscosity me ka piʻi ʻana o ka mahana.

3. Ka hopena

(1) Me ka hoʻonui mau ʻana o ka cellulose ether content, ʻo ka viscosity a me ka viscosity piʻi nui o ka sima.plaster based hoʻonui mau. ʻO ka molecular network structure o cellulose ether a me ka hui pūnaewele o nā huahana hydration cement e hui pū ʻia, a ʻo ka hydration mua o ka cement indirectly hoʻonui i ka neʻe ʻana o ka cellulose ether, no laila ka viscosity o ka cellulose ether solution a me ka sima.plaster based he "composite superposition effect", ʻo ia hoʻi, cellulose ether ʻO ka viscosity o ka sima i hoʻololi ʻia.plaster based ʻoi aku ka nui ma mua o ka huina o ko lākou mau viscosity. Hoʻohālikelike ʻia me nā slurries sima i hoʻololi ʻia e HPMC a me HEMC, ʻoi aku ka liʻiliʻi o nā waiwai hoʻāʻo viscosity HEC ma muli o ka hoʻomohala ʻana o ka hydration.

(2) ʻelua i hoʻololi ʻia ʻo cellulose etherplaster based a me ka sima maemaeplaster based Loaʻa iā ia ka waiwai o ka shear thinning a i ʻole pseudoplasticity; ka pseudoplasticity o cellulose ether hoʻololi simaplaster based ʻoi aku ka haʻahaʻa ma mua o ka sima maʻemaʻeplaster based; ʻo ka haʻahaʻa o ka rotation rate, a i ʻole ka cellulose ʻO ka haʻahaʻa o ka viscosity o ka sima i hoʻololi ʻia eteraplaster based, a i ʻole ka mea haʻahaʻa o ka cellulose ether, ʻoi aku ka maopopo o ka pseudoplasticity o cellulose ether-modified cement.plaster based.

(3) Ke hoʻomau nei ka piʻi ʻana o ka mahana, piʻi ka wikiwiki a me ke degere o ka hydration sima, no laila ka viscosity o ka sima maʻemaʻe.plaster based piʻi mālie. Ma muli o nā ʻano like ʻole a me ka nui o nā cellulose ethers i nā mana like ʻole e kāohi ai i ka hydration cement, ʻokoʻa ka viscosity o ka paʻi cement i hoʻololi ʻia me ka mahana.