Nonionic cellulose ether i loko o ka sima polimer

Ma ke ʻano he mea hoʻohui pono ʻole i ka sima polymer, nonionic cellulose ether i loaʻa i ka nānā nui a me ka noiʻi. Ma muli o nā palapala pili i ka home a me nā ʻāina ʻē, ua kūkākūkā ʻia ke kānāwai a me ke ʻano o ka non-ionic cellulose ether modified cement mortar mai nā ʻano o nā ʻano a me ke koho ʻana o ka cellulose ether non-ionic, kona hopena i nā waiwai kino o ka sima polymer. kona hopena i ka micromorphology a me nā waiwai mechanical, a ua waiho ʻia nā hemahema o ka noiʻi o kēia manawa. Na kēia hana e hāpai i ka hoʻohana ʻana i ka cellulose ether i loko o ka sima polymer.

Hua'ōlelo nui: nonionic cellulose ether, sima polimer, waiwai kino, waiwai mechanical, microstructure

1. Nānā nui

Me ka hoʻonui nui ʻana o ka noi a me nā koi o ka polymer cement i ka ʻoihana kūkulu, ua lilo ka hoʻohui ʻana i nā mea hoʻohui i kona hoʻololi ʻana i wahi wela o ka noiʻi, i waena o ia mea, ua hoʻohana nui ʻia ka cellulose ether ma muli o kona hopena i ka paʻa ʻana o ka wai mortar sima, mānoanoa, hoʻomaha, ea. a pela aku. I loko o kēia pepa, ua wehewehe ʻia nā ʻano o ka cellulose ether, nā hopena i ke kino a me nā ʻano mechanical o ka sima polymer a me ka micromorphology o ka sima polymer, e hāʻawi ana i kahi kuhikuhi theoretical no ka noi ʻana o ka cellulose ether i ka sima polymer.

2. Nā ʻano o ka cellulose ether nonionic

ʻO ka cellulose ether kahi ʻano hui polymer me ka hoʻolālā ether i hana ʻia mai ka cellulose. Nui nā ʻano cellulose ether, nona ka mana nui i nā waiwai o nā mea hana sima a paʻakikī ke koho. E like me ke ʻano kemika o nā substituent, hiki ke hoʻokaʻawale ʻia lākou i nā ethers anionic, cationic a me nonionic. Nonionic cellulose ether me ke kaulahao ʻaoʻao o H, cH3, c2H5, (cH2cH20)nH, [cH2cH(cH3)0]nH a me nā hui non-dissociable ʻē aʻe ka mea i hoʻohana nui ʻia i ka sima, nā ʻelele maʻamau he methyl cellulose ether, hydroxypropyl methyl. cellulose ether, hydroxyethyl methyl cellulose ether, hydroxyethyl cellulose ether a pēlā aku. Loaʻa nā hopena like ʻole o nā ʻano cellulose ethers i ka manawa hoʻonohonoho o ka sima. Wahi a nā moʻolelo moʻokalaleo ma mua, ʻo HEC ka mea hiki ke hoʻopaneʻe ikaika loa no ka sima, a ukali ʻia e HPMc a me HEMc, a ʻo Mc ka mea ʻino loa. No ke ʻano like o ka cellulose ether, molecular weight or viscosity, methyl, hydroxyethyl, hydroxypropyl content o kēia mau pūʻulu he ʻokoʻa, ʻokoʻa nō hoʻi kona hopena retarding. ʻO ka ʻōlelo maʻamau, ʻoi aku ka nui o ka viscosity a me ke kiʻekiʻe o ka ʻike o nā hui non-dissociable, ʻoi aku ka maikaʻi o ka hiki ke hoʻopaneʻe. No laila, i ke kaʻina hana maoli, e like me nā koi o ka coagulation mortar pāʻoihana, hiki ke koho ʻia ka ʻike pūʻulu hana kūpono o cellulose ether. A i ʻole i ka hana ʻana o ka cellulose ether i ka manawa like, hoʻoponopono i ka ʻike o nā hui hana, e hoʻokō i nā koi o ka mortar ʻokoʻa.

3、ka mana o ka nonionic cellulose ether i nā waiwai kino o ka sima polymer

3.1 Hoʻopili lohi

I mea e hooloihi i ka hydration paakiki manawa o ka sima, i ka mea hou hui 'ia i loko o ka lōʻihi manawa e noho plastic, no laila, e hoʻololi i ka manawa hoʻonohonoho o ka hou hui 'ana i ka mortar, hoʻomaikaʻi i kona operability, maʻamau hoʻohui retarder i ka mortar, non- ʻO ka ionic cellulose ether he kūpono no ka polymer cement he mea hoʻomaha maʻamau.

ʻO ka hopena hoʻopaneʻe o ka cellulose ether nonionic ma ka sima ka mea i hoʻopilikia nui ʻia e kona ʻano ponoʻī, viscosity, dosage, nā ʻano like ʻole o nā minela sima a me nā mea ʻē aʻe. Pourchez J et al. Ua hōʻike i ka kiʻekiʻe o ke kiʻekiʻe o ka cellulose ether methylation, ʻoi aku ka maikaʻi o ka hopena hoʻopaneʻe, ʻoiai ke kaumaha o ke kaumaha o ka cellulose ether a me ka hydroxypropoxy maʻiʻo he hopena nāwaliwali i ka hoʻopaneʻe ʻana o ka hydration sima. Me ka piʻi ʻana o ka viscosity a me ka nui o ka doping o non-ionic cellulose ether, ua mānoanoa ka papa adsorption ma ka ʻili o nā ʻāpana sima, a hoʻonui ʻia ka manawa hoʻonohonoho mua a me ka hope o ka sima, a ʻoi aku ka maopopo o ka hopena retarding. Ua hōʻike nā haʻawina i ka hoʻokuʻu ʻana o ka wela mua o nā slurries sima me nā ʻano HEMC ʻokoʻa ma kahi o 15% haʻahaʻa ma mua o nā slurries sima maʻemaʻe, akā ʻaʻohe ʻokoʻa nui i ke kaʻina hana hydration hope. Singh NK et al. Ua hōʻike ʻia me ka piʻi ʻana o ka nui o ka HEc doping, ʻo ka hoʻokuʻu ʻana i ka wela hydration o ka mortar sima i hoʻololi ʻia i hōʻike i ke ʻano o ka piʻi mua ʻana a laila emi, a ʻo ka ʻike HEC i ka wā e hiki ai i ka hoʻokuʻu wela hydration kiʻekiʻe e pili ana i ka makahiki hoʻōla.

Eia kekahi, ua ʻike ʻia ʻo ka hopena retarding o ka nonionic cellulose ether e pili kokoke ana i ka hana ʻana o ka sima. Peschard et al. Ua ʻike ʻia ʻo ka haʻahaʻa o ka tricalcium aluminate (C3A) i loko o ka sima, ʻoi aku ka maopopo o ka hopena o ka cellulose ether. schmitz L et al. Ua manaʻoʻiʻo ua kumu kēia ma muli o nā ʻano like ʻole o ka cellulose ether i nā kinetics hydration o tricalcium silicate (C3S) a me tricalcium aluminate (C3A). Hiki i ka cellulose ether ke hoʻemi i ka helu pane i ka manawa wikiwiki o C3S, ʻoiai no ka C3A, hiki iā ia ke hoʻolōʻihi i ka manawa induction, a hoʻopaneʻe i ke kaʻina hana paʻa a me ka paʻakikī o ka mortar.

Aia nā manaʻo like ʻole e pili ana i ke ʻano o ka non-ionic cellulose ether e hoʻopaneʻe ana i ka hydration cement. Silva et al. Manaʻo ʻo Liu ʻo ka hoʻokomo ʻia ʻana o ka cellulose ether e hoʻonui i ka viscosity o ka solution pore, pēlā e pale ai i ka neʻe ʻana o nā ion a hoʻopaneʻe i ka condensation. Eia naʻe, Pourchez et al. Ua manaʻoʻiʻo aia he pilina maopopo ma waena o ka lohi o ka cellulose ether i ka hydration cement a me ka viscosity o ka slurry cement. ʻO kekahi manaʻo ʻē aʻe ʻo ka hopena lohi o ka cellulose ether e pili kokoke ana i ka degradation alkali. Hiki i nā polysaccharides ke hoʻohaʻahaʻa maʻalahi e hana i ka hydroxyl carboxylic acid e hiki ke hoʻopaneʻe i ka hydration o ka sima ma lalo o nā kūlana alkaline. Eia nō naʻe, ua ʻike nā haʻawina he paʻa loa ka cellulose ether ma lalo o nā kūlana alkaline a hoʻohaʻahaʻa iki wale, a ʻaʻohe hopena liʻiliʻi o ka degradation i ka lohi o ka hydration sima. I kēia manawa, ʻo ka manaʻo paʻa loa ʻo ia ka hopena hoʻopaneʻe ma muli o ka adsorption. ʻO kahi kikoʻī, ʻo ka pūʻulu hydroxyl ma ka ʻili mole o cellulose ether he waikawa, ʻo ka ca(0H) i loko o ka ʻōnaehana hydration cement, a me nā ʻāpana mineral ʻē aʻe he alkaline. Ma lalo o ka hana synergistic o ka hydrogen hoʻopaʻa ʻana, complexing a hydrophobic, acidic cellulose ether mole e adsorbed ma luna o ka ʻili o nā ʻāpana sima alkaline a me nā huahana hydration. Eia kekahi, ua hana ʻia kahi kiʻiʻoniʻoni lahilahi ma luna o kona ʻili, e keakea ana i ka ulu hou ʻana o kēia mineral phase crystal nuclei a hoʻopaneʻe i ka hydration a me ka hoʻonohonoho ʻana o ka sima. ʻOi aku ka ikaika o ka mana adsorption ma waena o nā huahana hydration cement a me cellulose ether, ʻoi aku ka maopopo o ka lohi o ka hydration o ka sima. Ma ka lima hoʻokahi, ka nui o ka steric hindrance pāʻani i ka decisive hana i ka adsorption hiki, e like me ka steric hindrance liʻiliʻi o hydroxyl pūʻulu, kona ikaika acidity, adsorption ikaika no hoi. Ma ka ʻaoʻao ʻē aʻe, pili pū ka mana adsorption i ka haku ʻana o nā huahana hydration o ka sima. Pourchez et al. ua ʻike ʻia ua maʻalahi ka hoʻopili ʻana o ka cellulose ether i ka ʻili o nā huahana hydration e like me ca (0H) 2, csH gel a me ka calcium aluminate hydrate, akā ʻaʻole maʻalahi ke hoʻopili ʻia e ka ettringite a me ka pae unhydrated. Ua hōʻike pū ʻia ka haʻawina a Mullert he adsorption ikaika ka cellulose ether ma nā c3s a me kāna mau huahana hydration, no laila ua lohi nui ka hydration o ka pae silicate. He haʻahaʻa ka adsorption o ka ettringite, akā ua lohi nui ka hoʻokumu ʻana o ka ettringite. ʻO kēia no ka mea ua hoʻopili ʻia ka lohi o ka hoʻokumu ʻana o ka ettringite e ke koena ca2+ i ka hoʻonā, ʻo ia ka hoʻomau ʻana o ka lohi o ka cellulose ether i loko o ka hydration silicate.

3.2 Mālama wai

ʻO kekahi hopena hoʻololi koʻikoʻi o ka cellulose ether i loko o ka mortar sima ke ʻike ʻia ma ke ʻano he mea mālama wai, hiki ke pale i ka wai i loko o ka mortar pulu mai ka evaporation prematurely a i ʻole e komo ʻia e ke kumu, a hoʻopaneʻe i ka hydration o ka sima i ka wā e hoʻolōʻihi ai i ka manawa hana. ʻO ka hamo pulu, i mea e hiki ai ke hoʻopaʻa ʻia ka hamo lahilahi, hiki ke hohola ʻia ka hamo i hoʻopaʻa ʻia, a ʻaʻole pono e hoʻomaʻemaʻe mua ʻia ka hamo maʻalahi.

ʻO ka mana paʻa wai o ka cellulose ether e pili kokoke ana i kona viscosity, dosage, type a me ka mahana ambient. ʻO nā kūlana ʻē aʻe he like, ʻoi aku ka nui o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka hopena o ka mālama ʻana i ka wai, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi maikaʻi i ka pae paʻa wai o ka mortar; No ka cellulose ether like, ʻoi aku ka kiʻekiʻe o ka nui i hoʻohui ʻia, ʻoi aku ka kiʻekiʻe o ka paʻa wai o ka mortar i hoʻololi ʻia, akā aia kahi waiwai maikaʻi loa, ma waho aʻe o ka piʻi mālie ʻana o ka wai paʻa. No nā ʻano like ʻole o ka cellulose ether, aia kekahi mau ʻokoʻa i ka mālama ʻana i ka wai, e like me ka HPMc ma lalo o nā kūlana like ma mua o ka mālama ʻana i ka wai ʻoi aku ka maikaʻi o Mc. Eia kekahi, ke emi nei ka hana o ka mālama ʻana i ka wai o cellulose ether me ka piʻi ʻana o ka mahana ambient.

Ke manaʻoʻiʻo ʻia ʻo ke kumu o ka cellulose ether i ka hana o ka mālama ʻana i ka wai ma muli o ka 0H ma ka mole a me ka 0 atom ma ka paʻa eter e pili pū me nā mole wai e synthesize i ka paʻa hydrogen, no laila e paʻa ka wai manuahi. ka wai, i mea e hana maikaʻi ai i ka mālama ʻana i ka wai; Ua manaʻoʻiʻo nō hoʻi ʻo ka cellulose ether macromolecular kaulahao he mea paʻa i ka diffusion o nā molekole wai, i mea e hoʻomalu pono ai i ka hoʻoheheʻe ʻana o ka wai, e hoʻokō i ka paʻa wai kiʻekiʻe; Ua hoʻopaʻapaʻa ʻo Pourchez J ua loaʻa i ka cellulose ether ka hopena o ka mālama ʻana i ka wai ma o ka hoʻomaikaʻi ʻana i nā waiwai rheological o ka slurry sima hou i hui ʻia, ke ʻano o ka pūnaewele porous a me ka hoʻokumu ʻana i ke kiʻi cellulose ether i keʻakeʻa i ka hoʻopuehu ʻana o ka wai. Laetitia P et al. manaʻoʻiʻo hoʻi ʻo ka waiwai rheological o ka mortar kahi kumu nui, akā manaʻoʻiʻo hoʻi ʻaʻole ʻo ka viscosity wale nō ka mea e hoʻoholo ai i ka maikaʻi o ka mālama ʻana i ka wai. He mea pono e hoʻomaopopo i ka oiai cellulose etera i ka wai maikaʻi ka hoʻopaʻa 'ana, akā, e emi kona hoʻololi 'ia paakiki sima mortar wai absorption, ke kumu o ka cellulose etera i loko o ka mortar film, a i loko o ka mortar ka nui helu o nā pores paʻa liʻiliʻi, blocking. ka puna i loko o ke kapikala.

3.3 Mānoanoa

ʻO ke kūpaʻa o ka mortar kekahi o nā kuhikuhi nui e ana i kāna hana hana. Hoʻokomo pinepine ʻia ka cellulose ether e hoʻonui i ka kūlike. ʻO ka "consistency" ka mea hiki ke kahe a hoʻoheheʻe ʻia ma lalo o ka hana o ka umekaumaha a i ʻole nā ​​​​mea i waho. Hoʻopili nā waiwai ʻelua o ka mānoanoa a me ka paʻa ʻana o ka wai. ʻO ka hoʻohui ʻana i ka nui kūpono o ka cellulose ether ʻaʻole hiki ke hoʻomaikaʻi wale i ka hana paʻa ʻana o ka wai o ka mortar, e hōʻoia i ka hana maʻemaʻe, akā e hoʻonui i ka kūlike o ka mortar, e hoʻonui nui i ka hiki anti-dispersion o ka sima, hoʻomaikaʻi i ka hana paʻa ma waena o ka mortar a me ka matrix, a e hoemi i ke ano o ka moka.

ʻO ka hopena mānoanoa o ka cellulose ether ka mea nui mai kona viscosity, ʻoi aku ka nui o ka viscosity, ʻoi aku ka maikaʻi o ka hopena mānoanoa, akā inā ʻoi aku ka nui o ka viscosity, e hōʻemi ia i ka wai o ka mortar, e pili ana i ke kūkulu ʻana. ʻO nā mea e pili ana i ka hoʻololi viscosity, e like me ke kaumaha molekala (a i ʻole degere o ka polymerization) a me ka neʻe ʻana o ka cellulose ether, ka wela o ka hopena, ka nui o ka shear, e hoʻopili i ka hopena mānoanoa hope.

ʻO ke ʻano mānoanoa o ka cellulose ether ka mea nui mai ka hydration a me ka hoʻopili ʻana ma waena o nā mole. Ma ka lima hoʻokahi, ka polymer kaulahao o cellulose etera mea oluolu e hana hydrogen paʻa me ka wai i loko o ka wai, hydrogen paʻa hana ia i kiʻekiʻe hydration; Ma ka ʻaoʻao ʻē aʻe, i ka wā e hoʻohui ʻia ai ka cellulose ether i ka mortar, e hoʻomoʻo ia i ka wai nui, no laila e hoʻonui nui ʻia kona leo ponoʻī, e hōʻemi ana i ka hakahaka o nā ʻāpana, i ka manawa like e hui pū ai nā kaulahao molecular cellulose ether me kekahi. e hoʻokumu i ʻekolu-dimensional network structure, ua hoʻopuni ʻia nā ʻāpana mortar i kahi, ʻaʻole kahe manuahi. I nā huaʻōlelo ʻē aʻe, ma lalo o kēia mau hana ʻelua, hoʻomaikaʻi ʻia ka viscosity o ka ʻōnaehana, no laila e loaʻa ai ka hopena mānoanoa i makemake ʻia.

4. Ka hopena o ka nonionic cellulose ether ma ka morphology a me ka pore structure o ka polymer cement

E like me ka mea i ʻike ʻia ma luna, he hana koʻikoʻi ka non-ionic cellulose ether i ka sima polymer, a ʻo kona hoʻohui ʻana e hoʻopilikia maoli i ka microstructure o ka mortar sima holoʻokoʻa. Hōʻike nā hualoaʻa i ka non-ionic cellulose ether e hoʻonui pinepine i ka porosity o ka mortar sima, a me ka nui o nā pores i ka nui o 3nm ~ 350um piʻi, i waena o ka nui o nā pores i ka laulā o 100nm ~ 500nm e hoʻonui nui. ʻO ka hoʻoikaika ʻana i ke ʻano pore o ka mortar sima e pili pono ana i ke ʻano a me ka viscosity o ka non-ionic cellulose ether i hoʻohui ʻia. Ou Zhihua et al. manaʻoʻiʻo i ka wā like ka viscosity, ʻoi aku ka liʻiliʻi o ka porosity o ka mortar sima i hoʻololi ʻia e HEC ma mua o ka HPMc a me Mc i hoʻohui ʻia ma ke ʻano he mea hoʻololi. No ka cellulose ether like, ʻoi aku ka liʻiliʻi o ka viscosity, ʻoi aku ka liʻiliʻi o ka porosity o ka mortar sima i hoʻololi ʻia. Ma ke aʻo ʻana i ka hopena o ka HPMc ma ka aperture o ka papa insulation cement foamed, Wang Yanru et al. ʻike ʻia ʻo ka hoʻohui ʻana o HPMC ʻaʻole i hoʻololi nui i ka porosity, akā hiki ke hōʻemi nui i ka aperture. Eia naʻe, ʻo Zhang Guodian et al. ʻike ʻia ʻo ka ʻoi aku ka nui o ka HEMc maʻiʻo, ʻoi aku ka maopopo o ka mana i ke ʻano pore o ka slurry sima. ʻO ka hoʻohui o HEMc hiki ke hoʻonui nui i ka porosity, ka nui o ka pore a me ka awelika pore radius o ka sima slurry, akā ke emi nei ka ʻāpana kikoʻī o ka pore, a ʻo ka nui o nā pores capillary nui i ʻoi aku ka nui ma mua o 50nm i ke anawaena e hoʻonui nui ʻia, a me nā pores i hoʻokomo ʻia. he mau pores paʻa.

Ka hopena o ka nonionic cellulose ether ma ke kaʻina hana o ka cement slurry pore structure i kālailai ʻia. Ua ʻike ʻia ʻo ka hoʻohui ʻana o ka cellulose ether i hoʻololi nui i nā waiwai o ka pae wai. Ma kekahi ʻaoʻao, e emi ana ka ʻili o ka wai, e maʻalahi ka hana ʻana i nā ʻōhū i loko o ka pahu sima, a e hoʻolōʻihi i ka hoʻokaʻawale ʻana o ka wai a me ka hoʻoheheʻe ʻana, i paʻakikī nā ʻōpala liʻiliʻi e hōʻiliʻili i loko o nā ʻōpū nui a hoʻokuʻu, no laila ka voidage ua mahuahua loa; Ma ka ʻaoʻao ʻē aʻe, hoʻonui ka viscosity o ka pae wai, ka mea e pale ai i ka hoʻoheheʻe ʻana, ka diffusion bubble a me ka hui pū ʻana, a hoʻonui i ka hiki ke hoʻopaʻa i nā bubbles. No laila, hiki ke loaʻa ke ʻano o ka mana o ka cellulose ether ma ka puʻupuʻu pore nui o ka mortar sima: i ka nui o ka nui o ka pore ma mua o 100nm, hiki ke hoʻokomo ʻia nā ʻūhū ma ka hoʻemi ʻana i ka ʻili o ka wai, a hiki ke kāohi ʻia ka diffusion e hoʻonui i ka viscosity wai; ma ka ʻāina o 30nm ~ 60nm, hiki ke hoʻopili ʻia ka helu o nā pores i ka ʻāina ma ke kāohi ʻana i ka hui ʻana o nā pua liʻiliʻi.

5. Ka hopena o ka nonionic cellulose ether ma nā waiwai mechanical o ka sima polymer

ʻO nāʻano mechanical o ka sima polymer pili loa i kona morphology. Me ka hoʻohui ʻana o ka cellulose ether nonionic, piʻi ka porosity, kahi i hoʻopaʻa ʻia i ka hopena maikaʻi ʻole i kona ikaika, ʻoi aku ka ikaika compressive a me ka ikaika flexural. ʻOi aku ka nui o ka emi ʻana o ka ikaika compressive o ka mīkini sima ma mua o ka ikaika flexural. Ou Zhihua et al. ua aʻo i ka mana o nā ʻano like ʻole o ka cellulose ether non-ionic ma nā ʻano mechanical o ka mortar sima, a ua ʻike ʻia ʻo ka ikaika o ka cellulose ether i hoʻololi ʻia i ka pahu sima ma mua o ka pahu sima maʻemaʻe, a ʻo ka haʻahaʻa haʻahaʻa 28d ikaika compressive he 44.3% wale nō. o ka slurry sima maemae. ʻO ka ikaika compressive a me ka ikaika flexural o HPMc, HEMC a me MC cellulose etera i hoʻololiʻia heʻano like ia,ʻoiaiʻo ka ikaika compressive a me ka ikaika flexural o HEc i hoʻololiʻia i ka slurry sima i kēlā me kēia makahiki. Pili loa kēia i ko lākou viscosity a i ʻole ke kaumaha molekala, ʻoi aku ka kiʻekiʻe o ka viscosity a i ʻole ke kaumaha molecular o cellulose ether, a i ʻole ka nui o ka hana ʻili, ʻo ia ka haʻahaʻa o ka ikaika o kāna mortar sima i hoʻololi ʻia.

Eia nō naʻe, ua hōʻike ʻia e hiki i ka nonionic cellulose ether ke hoʻonui i ka ikaika tensile, ka maʻalahi a me ka cohesibility o ka mortar sima. Huang Liangen et al. ua ʻike ʻia, kūʻē i ke kānāwai hoʻololi o ka ikaika compressive, ua hoʻonui ʻia ka ikaika shear a me ka ikaika tensile o ka slurry me ka hoʻonui ʻana o ka ʻike o ka cellulose ether i loko o ka pahu sima. ʻIke i ke kumu, ma hope o ka hoʻohui ʻana o ka cellulose ether, a me ka polymer emulsion e hana i ka nui o nā kiʻi polymer dense, e hoʻomaikaʻi nui i ka maʻalahi o ka slurry, a me nā huahana hydration cement, unhydrated cement, fillers a me nā mea ʻē aʻe i hoʻopiha ʻia i kēia kiʻiʻoniʻoni. , e hōʻoia i ka ikaika tensile o ka ʻōnaehana uhi.

I mea e hoʻomaikaʻi ai i ka hana o ka non-ionic cellulose ether i hoʻololi ʻia polymer cement, e hoʻomaikaʻi i nā ʻano kino o ka mortar sima i ka manawa like, ʻaʻole e hōʻemi nui i kona mau ʻano mechanical, ʻo ka hana maʻamau e hoʻohālikelike i ka cellulose ether a me nā mea hoʻohui ʻē aʻe, i hoʻohui ʻia i. ka pahū sima. Li Tao-wen et al. Ua ʻike ʻia ʻo ka mea hoʻohui i haku ʻia me ka cellulose ether a me ka pauka polymer glue ʻaʻole wale i hoʻomaikaʻi iki i ka ikaika kulou a me ka ikaika compressive o ka mortar, no laila ʻoi aku ka maikaʻi o ka cohesiveness a me ka viscosity o ka mortar sima no ke kūkulu ʻana i ka uhi, akā hoʻomaikaʻi maikaʻi hoʻi i ka paʻa ʻana o ka wai. hiki ke hoʻohālikelike ʻia me ka cellulose ether hoʻokahi. Xu Qi et al. ua hoʻohui ʻia ka pauka slag, ka mea hoʻemi wai a me ka HEMc, a ua ʻike ʻia e hiki i ka mea hoʻemi wai a me ka pauka mineral ke hoʻonui i ka nui o ka mortar, hoʻemi i ka helu o nā lua, i mea e hoʻomaikaʻi ai i ka ikaika a me ka modulus elastic o ka mortar. Hiki i ka HEMc ke hoʻonui i ka ikaika paʻa o ka mortar, akā ʻaʻole maikaʻi ia no ka ikaika compressive a me ka modulus elastic o ka mortar. ʻO Yang Xiaojie et al. ua ʻike ʻia e hiki ke hoʻemi nui ʻia ka haʻihaʻi ʻana o ka plastic shrinkage o ka pahu sima ma hope o ka hui ʻana i ka pulu HEMc a me PP.

6. Ka hopena

Nonionic cellulose ether pāʻani koʻikoʻi i ka polymer sima, hiki ke hoʻomaikaʻi nui i nā waiwai kino (me ka retarding coagulation, ka paʻa ʻana o ka wai, ka mānoanoa), microscopic morphology a me nā waiwai mechanical o ka mortar sima. He nui nā hana i hana ʻia ma ka hoʻololi ʻana i nā mea hana sima e ka cellulose ether, akā aia kekahi mau pilikia e pono ai ke aʻo hou. No ka laʻana, ma nā noi ʻenekinia hana, ʻaʻole i hoʻokumu ʻia kahi pilina pili mau me ka cellulose ether i hoʻohui ʻia. ʻAʻole lawa ka noiʻi e pili ana i ka neʻe ʻana o ka cellulose ether polymer a me nā huahana hydration cement i ka hopena hydration. ʻAʻole maopopo i ke kaʻina hana a me ka mīkini o nā mea hoʻohui i haku ʻia me ka cellulose ether a me nā mea hoʻohui ʻē aʻe. ʻAʻole i hoʻokō pono ʻia ka hui pū ʻana o cellulose ether a me nā mea i hoʻoikaika ʻia e like me ke aniani aniani. ʻO kēia mau mea a pau ke kumu o ka noiʻi e hiki mai ana e hāʻawi i ke alakaʻi kumu no ka hoʻomaikaʻi hou ʻana i ka hana o ka sima polymer.