ʻO ka hopena o ka Cellulose Ether ma nā waiwai mortar

Ua aʻo ʻia nā hopena o ʻelua ʻano cellulose ethers i ka hana o ka mortar. Ua hōʻike ʻia nā hopena e hiki i nā ʻano cellulose ethers ke hoʻomaikaʻi nui i ka paʻa ʻana o ka wai o ka pahū a hoʻemi i ka paʻa ʻana o ka moka; Hoʻemi ʻia ka ikaika compressive i nā degere like ʻole, akā ua hoʻonui ʻia ka lākiō pelu a me ka ikaika hoʻopaʻa ʻana o ka mortar i nā degere like ʻole, pēlā e hoʻomaikaʻi ai i ke kūkulu ʻana o ka mortar.

Hua'ōlelo nui:cellulose ether; mea mālama wai; ikaika pili

Cellulose ether (MC)he mea ia o ka cellulose mea maoli. Hiki ke hoʻohana ʻia ka cellulose ether e like me ka wai paʻa wai, thickener, binder, dispersant, stabilizer, suspending agent, emulsifier a me film-forming aid, etc. ʻO ka mortar, no laila ʻo ka cellulose ether ka polymer hiki ke hoʻohana pinepine ʻia i ka wai i loko o ka mortar.

1. Nā mea ho'āʻo a me nāʻano ho'āʻo

1.1 Mea maka

Cement: ʻO ka sima Portland maʻamau i hana ʻia e Jiaozuo Jianjian Cement Co., Ltd., me ka helu ikaika o 42.5. Ke one: Nanyang one melemele, fineness modulus 2.75, one medium. Cellulose ether (MC): C9101 i hana ʻia e Beijing Luojian Company a me HPMC i hana ʻia e Shanghai Huiguang Company.

1.2 Hana ho'āʻo

I loko o kēia haʻawina, ʻo ka ratio lime-sand he 1:2, a ʻo ka ratio wai-cement he 0.45; ʻO ka cellulose ether i hui pū ʻia me ka sima mua, a laila hoʻohui ʻia ke one a hoʻoulu like. Ua helu ʻia ke ʻano o ka cellulose ether e like me ka pākēneka o ka nui sima.

Hana ʻia ka hoʻāʻo ikaika compressive a me ka hoʻāʻo kūlike me ka kuhikuhi ʻana iā JGJ 70-90 "Nā Hana Hoʻāʻo no nā Pono Pono o ke kūkulu ʻana i ka Mortar". Hana ʻia ka hoʻāʻo ikaika flexural e like me GB / T 17671-1999 "Cement Mortar Strength Test".

Ua hoʻokō ʻia ka hoʻāʻo paʻa wai e like me ke ʻano pepa kānana i hoʻohana ʻia i nā ʻoihana hoʻomohala ʻenehana aerated Farani. Penei ke kaʻina hana kiko'ī: (1) kau i 5 mau ʻāpana pepa kānana lohi ma luna o ka pā poʻe pōʻai, a kaupaona i kona nuipaʻa; (2) hoʻokomo i kekahi ma ka pili pono me ka mortar E kau i ka pepa kānana kiʻekiʻe ma luna o ka pepa kānana lohi, a laila kaomi i ka cylinder me ke anawaena o loko o 56 mm a me ke kiʻekiʻe o 55 mm ma ka pepa kānana wikiwiki; (3) E ninini i ka mortar i loko o ka cylinder; (4) Ma hope o ka hoʻopili ʻana o ka mortar a me ka pepa kānana no 15 mau minuke, e kaupaona hou i ka maikaʻi o ka pepa kānana lohi a me ka disc plastik; (5) E helu i ka nui o ka wai i hoʻomoʻa ʻia e ka pepa kānana lohi i kēlā me kēia ʻāpana mika square, ʻo ia ka nui o ka lawe ʻana i ka wai; (6) ʻO ka helu hoʻoheheʻe wai ka helu helu o nā hopena hoʻokolohua ʻelua. Inā ʻoi aku ka ʻokoʻa ma waena o nā helu helu ma mua o 10%, pono e hana hou ʻia ka hoʻāʻo; (7) Hōʻike ʻia ka paʻa ʻana o ka wai o ka mortar e ka nui o ka lawe ʻana i ka wai.

Ua hoʻokō ʻia ka hoʻāʻo ikaika paʻa e pili ana i ke ʻano i ʻōlelo ʻia e ka Japan Society for Materials Science, a ua ʻike ʻia ka ikaika paʻa e ka ikaika flexural. Hoʻohana ka hōʻike i kahi laʻana prism nona ka nui he 160mm×40mm×40mm. Ua ho'ōla ʻia ka laʻana mortar maʻamau i hana mua ʻia a hiki i ka makahiki 28 d, a laila ʻoki ʻia i ʻelua ʻāpana. Ua hana ʻia nā ʻāpana ʻelua o ka laʻana i mau laʻana me ka mortar maʻamau a i ʻole polymer mortar, a laila hoʻōla maoli ʻia i loko o ka hale a hiki i kekahi makahiki, a laila hoʻāʻo ʻia e like me ke ʻano hoʻāʻo no ka ikaika flexural o ka mīkini sima.

2. Nā hopena hoʻāʻo a me ka nānā ʻana

2.1 Kūlike

Mai ka hopena o ka cellulose ether ma ke kūlike o ka mortar, hiki ke ʻike ʻia me ka hoʻonui ʻana o ka ʻike o ka cellulose ether, ʻoi aku ka wikiwiki o ka hoʻohālikelike ʻana o ka mortar i ke ʻano i lalo, a ʻoi aku ka wikiwiki o ka emi ʻana o ka paʻa o ka mortar i hui pū ʻia me HPMC. ma mua o ka mortar i hui pū ʻia me C9101. ʻO kēia ke kumu o ka viscosity o cellulose ether e keʻakeʻa nei i ke kahe o ka mortar, a ʻoi aku ka kiʻekiʻe o ka viscosity o HPMC ma mua o ka C9101.

2.2 Paʻa wai

I loko o ka mortar, pono e hoʻomaʻemaʻe ʻia nā mea cementitious e like me ka cement a me ka gypsum me ka wai e hoʻonohonoho ai. Hiki i ka nui kūpono o ka cellulose ether ke mālama i ka wai i loko o ka mortar no ka manawa lōʻihi, i hiki ke hoʻomau i ka hoʻonohonoho a me ka paʻakikī.

Mai ka hopena o ka maʻiʻo cellulose ether i ka paʻa ʻana o ka wai o ka mortar, hiki ke ʻike ʻia: (1) Me ka piʻi ʻana o ka C9101 a i ʻole HPMC cellulose ether maʻiʻo, ua emi nui ka wai absorption rate o ka mortar, ʻo ia hoʻi, ka paʻa ʻana o ka wai. Ua hoʻomaikaʻi maikaʻi ʻia ka mortar, ʻoi aku ka nui o ka hui ʻana me ka Motar o HPMC. Hiki ke hoʻomaikaʻi hou ʻia kona paʻa wai; (2) Ke 0.05% a hiki i ka 0.10% ka nui o ka HPMC, e hoʻokō pono ka mortar i nā koi paʻa wai i ke kaʻina hana.

ʻO nā eter cellulose ʻelua he polymers non-ionic. Hiki i nā hui hydroxyl ma ke kaulahao molekula cellulose ether a me nā ʻātoma oxygen ma nā paʻa eter ke hana i nā paʻa hydrogen me nā molekole wai, e hoʻolilo i ka wai manuahi i loko o ka wai paʻa, no laila ke pāʻani maikaʻi nei i ka mālama ʻana i ka wai.

ʻO ka paʻa ʻana o ka wai o ka cellulose ether e hilinaʻi nui ʻia i kona viscosity, ka nui o ka ʻāpana, ka helu dissolution a me ka nui o ka hoʻohui. Ma keʻano laulā, ʻoi aku ka nui o ka nui i hoʻohui ʻia, ʻoi aku ka kiʻekiʻe o ka viscosity, a ʻoi aku ka maikaʻi o ka fineness, ʻoi aku ka kiʻekiʻe o ka paʻa wai. Loaʻa iā C9101 a me HPMC cellulose ether nā pūʻulu methoxy a me hydroxypropoxy i loko o ke kaulahao mole, akā ʻoi aku ka kiʻekiʻe o ka methoxy i loko o ka HPMC cellulose ether ma mua o C9101, a ʻoi aku ka kiʻekiʻe o ka viscosity o HPMC ma mua o ka C9101, no laila ka paʻa ʻana o ka wai o ka mortar. ʻoi aku ka kiʻekiʻe o ka hui ʻana me ka HPMC ma mua o ka mortar i hui pū ʻia me HPMC C9101 mortar nui. Eia naʻe, inā kiʻekiʻe loa ka viscosity a me ke kaumaha molecular pili o cellulose ether, e emi ana kona solubility e like me ia, a he hopena maikaʻi ʻole ia i ka ikaika a me ka hana o ka mortar. ʻO ka ikaika hoʻolālā e hoʻokō i ka hopena pili maikaʻi.

2.3 Ka ikaika flexural a me ka ikaika compressive

Mai ka hopena o ka cellulose ether ma ka flexural and compressive strength of mortar, hiki ke ʻike ʻia me ka hoʻonui ʻia o ka ʻike o ka cellulose ether, ʻo ka flexural a me ka ikaika compressive o ka mortar ma 7 a me 28 mau lā i hōʻike i kahi ʻano iho. ʻO kēia ke kumu: (1) Ke hoʻohui ʻia ka cellulose ether i ka mortar, hoʻonui ʻia nā polymers maʻalahi i loko o nā pores o ka mortar, a ʻaʻole hiki i kēia mau polymers maʻalahi ke hāʻawi i ke kākoʻo paʻa i ka wā e hoʻopili ʻia ai ka matrix composite. ʻO ka hopena, ua hoʻemi ʻia ka ikaika flexural a me ka compressive o ka mortar; (2) Me ka hoʻonui ʻana o ka ʻike o ka cellulose ether, ʻoi aku ka maikaʻi o ka hoʻopaʻa ʻana i ka wai, no laila ma hope o ka hoʻokumu ʻia ʻana o ka pahu hoʻāʻo mortar, piʻi ka porosity i ka pahu hoʻāʻo mortar, e hoʻemi ʻia ka ikaika flexural a me ka compressive. ; (3) i ka wā e hui pū ʻia ai ka mortar maloʻo me ka wai, e hoʻopili mua ʻia nā ʻāpana cellulose ether latex ma luna o ka ʻili o nā ʻāpana sima e hana i kahi kiʻi ʻoniʻoni, e hōʻemi ana i ka hydration o ka sima, a laila e hōʻemi ana i ka ikaika o ka sima. ka hamo.

2.4 Lakiō pila

ʻO ka maʻalahi o ka mortar e hāʻawi i ka mortar me ka deformability maikaʻi, e hiki ai iā ia ke hoʻololi i ke koʻikoʻi i hana ʻia e ka shrinkage a me ka deformation o ka substrate, pēlā e hoʻomaikaʻi nui ai i ka ikaika paʻa a me ka lōʻihi o ka mortar.

Mai ka hopena o ka maʻiʻo cellulose ether ma luna o ka lākiō pelupili mortar (ff/fo), hiki ke ʻike ʻia me ka piʻi ʻana o ka cellulose ether C9101 a me ka maʻiʻo HPMC, ua hōʻike nui ʻia ka ratio pelupili mortar i ka piʻi nui ʻana, e hōʻike ana i ka maʻalahi o ka mortar. hoʻomaikaʻi.

Ke hoʻoheheʻe ʻia ka cellulose ether i loko o ka mortar, no ka mea, ʻo ka methoxyl a me ka hydroxypropoxyl ma ke kaulahao mole e hana me ka Ca2 + a me Al3 + i loko o ka slurry, ua hana ʻia kahi gel viscous a hoʻopiha ʻia i loko o ka lua mortar sima, no laila ke pāʻani nei ia i ka hoʻopiha piha ʻana. a me ka hoʻoikaika maʻalahi, e hoʻomaikaʻi i ka compactness o ka mortar, a hōʻike ia i ka hoʻomaikaʻi ʻana o ka mortar i hoʻololi ʻia i ka macroscopically.

2.5 Ka ikaika pili

Mai ka hopena o ka maʻiʻo cellulose ether i ka ikaika paʻa mortar, hiki ke ʻike ʻia ka piʻi ʻana o ka ikaika o ka mortar me ka piʻi ʻana o ka ʻike cellulose ether.

Hiki i ka hoʻohui ʻana o cellulose ether ke hana i kahi ʻāpana lahilahi o ke kiʻiʻoniʻoni polymer wai ma waena o ka cellulose ether a me nā ʻāpana cement hydrated. He hopena hoʻopaʻa kēia kiʻiʻoniʻoni a hoʻomaikaʻi i ke ʻano "maloʻo maloʻo" o ka mortar. Ma muli o ka mālama maikaʻi ʻana o ka wai o cellulose ether, mālama ʻia ka wai i loko o ka mortar, no laila e hōʻoiaʻiʻo ai i ka paʻakikī hydration o ka sima a me ka hoʻomohala piha o kona ikaika, a me ka hoʻomaikaʻi ʻana i ka ikaika paʻa o ka paʻi sima. Eia kekahi, ʻo ka hoʻohui ʻana o ka cellulose ether e hoʻomaikaʻi i ka cohesion o ka mortar, a hoʻolilo i ka mortar i ka plasticity maikaʻi a me ka maʻalahi, ʻo ia hoʻi ka mea e hiki ai i ka mortar ke hoʻololi i ka deformation shrinkage o ka substrate, a laila e hoʻomaikaʻi ai i ka ikaika paʻa o ka mortar. .

2.6 Hoemi

Hiki ke ʻike ʻia mai ka hopena o ka cellulose ether content i ka emi ʻana o ka mortar: (1) ʻOi aku ka haʻahaʻa o ka waiwai hoʻemi o ka cellulose ether mortar ma mua o ka mortar blank. (2) Me ka hoʻonui ʻana o ka ʻike C9101, ua emi mālie ka waiwai o ka mortar, akā i ka wā i hiki ai ka ʻike i ka 0.30%, ua hoʻonui ʻia ka waiwai o ka mortar. ʻO kēia no ka mea ʻoi aku ka nui o ka cellulose ether, ʻoi aku ka nui o kona viscosity, kahi e hoʻonui ai i ka koi wai. (3) Me ka hoʻonui ʻana o ka HPMC maʻiʻo, ua emi mālie ka waiwai hoʻohaʻahaʻa o ka mortar, akā i ka wā i hiki ai i ka 0.20%, ua hoʻonui ʻia ka waiwai shrinkage o ka mortar a laila emi iho. ʻO kēia no ka mea ʻoi aku ka viscosity o HPMC ma mua o ka C9101. ʻO ke kiʻekiʻe o ka viscosity o cellulose ether. ʻOi aku ka maikaʻi o ka paʻa ʻana o ka wai, ʻoi aku ka nui o ka ea, ke piʻi ka ea i kahi kiʻekiʻe, e hoʻonui ʻia ka waiwai hoʻemi o ka mortar. No laila, ma ke ʻano o ka waiwai shrinkage, ʻo ke ʻano kūpono o C9101 ʻo 0.05% ~ 0.20%. ʻO ka helu kūpono loa o ka HPMC he 0.05% ~ 0.10%.

3. Ka hopena

1. Hiki i ka cellulose ether ke hoʻomaikaʻi i ka paʻa ʻana o ka wai o ka mortar a hoʻemi i ke kūlike o ka mortar. ʻO ka hoʻoponopono ʻana i ka nui o ka cellulose ether hiki ke hoʻokō i nā pono o ka mortar i hoʻohana ʻia i nā papahana like ʻole.

2. ʻO ka hoʻohui ʻana o ka cellulose ether e hoʻemi i ka ikaika flexural a me ka ikaika compressive o ka mortar, akā hoʻonui i ka ratio pelupi a me ka ikaika hoʻopaʻa i kekahi ʻano, a laila e hoʻomaikaʻi ai i ka paʻa o ka mortar.

3. ʻO ka hoʻohui ʻana o ka cellulose ether hiki ke hoʻomaikaʻi i ka hana hoʻohaʻahaʻa o ka mortar, a me ka hoʻonui ʻana o kāna ʻike, e liʻiliʻi a liʻiliʻi ka waiwai hoʻemi o ka mortar. Akā ke piʻi ka nui o ka cellulose ether i kahi pae, piʻi ka nui o ka shrinkage o ka mortar i kekahi ʻano ma muli o ka piʻi ʻana o ka nui o ka ea.