ʻO ka hopena o ka pauka emulsion a me ka cellulose ether i loko o ka tile adhesive

ʻO ka pāpaʻi tile kekahi o nā noi nui loa o ka mortar hui maloʻo kūikawā i kēia manawa. ʻO kēia ke ʻano o ka sima ma ke ʻano he mea sima nui a hoʻohui ʻia e nā aggregated graded, nā mea mālama wai, nā mea ikaika mua, ka pauka latex a me nā mea hoʻohui a i ʻole nā ​​​​mea hoʻohui. huikau. ʻO ka maʻamau, pono e hui pū ʻia me ka wai ke hoʻohana ʻia. Hoʻohālikelike ʻia me ka mortar sima maʻamau, hiki iā ia ke hoʻomaikaʻi nui i ka ikaika hoʻopaʻa ʻana ma waena o ka mea e kū ana a me ka substrate, he kūpaʻa paheʻe maikaʻi a he kūpaʻa wai maikaʻi loa a me ka pale wela. A ʻo nā mea maikaʻi o ka pale ʻana i ka pōʻai manuahi, i hoʻohana nui ʻia no ka hoʻopili ʻana i ka hale o loko a me waho o ka pā hale, nā ʻili papahele a me nā mea hoʻonaninani ʻē aʻe, i hoʻohana nui ʻia i loko a me nā paia o waho, nā papahele, nā lumi ʻauʻau, nā kīhini a me nā wahi hoʻonaninani ʻē aʻe. ʻoi loa ka hoʻohana nui ʻana i nā mea hoʻopaʻa tile ceramic.

ʻO ka manawa maʻamau ke hoʻokolokolo mākou i ka hana o ka tile adhesive, ʻaʻole mākou e hoʻolohe wale i kāna hana hana a me ka hiki ke anti-sliding, akā e hoʻolohe pū i kona ikaika mechanical a me ka manawa wehe.Cellulose eterai ka tile adhesive ʻaʻole pili wale i nā waiwai rheological o ka porcelain adhesive, e like me ka hana maʻemaʻe, ka paʻi ʻana i ka pahi, a me nā mea ʻē aʻe, akā he mana ikaika hoʻi i nā ʻano mechanical o ka tile adhesive. ʻO ka hopena i ka manawa wehe o ka tile adhesive

I ka emulsion pauda a me ka cellulose etera co-e noho i loko o ka pulu pulu, kekahi ikepili hoike ia emulsion pauda i ikaika kinetic ikehu e hoopili aku i ka sima hydration huahana, a me ka cellulose etera noho hou i loko o ka interstitial wai, e pili ana i ka mortar oi viscosity a me ka hoonohonoho manawa. ʻOi aku ka kiʻekiʻe o ka ʻili o ka cellulose etera ma mua o ka pauka emulsion, a ʻoi aku ka nui o ka hoʻonui ʻana i ka cellulose etera ma ka mortar interface e pono ai ka hoʻokumu ʻana i nā paʻa hydrogen ma waena o ka ʻili kumu a me ka cellulose etera.

I loko o ka mortar pulu, evaporates ka wai i loko o ka mortar, a hoʻonuiʻia ka cellulose ether ma luna o kaʻili, a e hanaʻia kahi kiʻiʻoniʻoni ma luna o ka ili o ka pahū i loko o 5 mau minuke, e hoʻemi ana i ka helu evaporation ma hope, no ka mea, nui ka wai. wehe 'ia mai ka mānoanoa manoanoa hapa o ia e neʻe aku i ka thinner mortar papa, a me ka kiʻiʻoniʻoni i hanaia ma ka hoʻomaka 'ana i hapa hoʻoheheʻe, a me ka neʻeʻana o ka wai e lawe hou cellulose etera enrichment ma luna o ka mortar ili.

No laila, ʻo ka hoʻokumu ʻana o ke kiʻiʻoniʻoni o cellulose ether ma ka ʻili o ka mortar he mana nui i ka hana o ka mortar.

1) He lahilahi loa ka kiʻiʻoniʻoni i hana ʻia a hoʻoheheʻe ʻia ʻelua, ʻaʻole hiki ke kaupalena i ka hoʻoheheʻe ʻana o ka wai a hoʻemi i ka ikaika.

2) He mānoanoa loa ka kiʻiʻoniʻoni i hana ʻia, ʻoi aku ka kiʻekiʻe o ka cellulose ether i loko o ka wai interstitial mortar, a kiʻekiʻe ka viscosity, no laila ʻaʻole maʻalahi ke wāwahi i ka kiʻiʻoniʻoni i ka wā i hoʻopili ʻia ai nā tile.

Hiki ke ʻike ʻia he ʻoi aku ka nui o ka hopena o ka hana kiʻiʻoniʻoni o cellulose ether i ka manawa wehe. ʻO keʻano o ka cellulose ether (HPMC, HEMC, MC, a me nā mea'ē aʻe) a me ka degere o ka etherification (substitution degree) pili pono i nā mea hana kiʻiʻoniʻoni o cellulose ether, a me ka paʻakikī a me ka paʻakikī o ke kiʻi.

Ma waho aʻe o ka hāʻawi ʻana i nā waiwai pono i ʻōlelo ʻia ma luna o ka mortar, ke hoʻopaneʻe nei ka cellulose ether i nā kinetics hydration o ka sima. ʻO kēia hopena hoʻopaneʻe ma muli o ka adsorption o nā molekole cellulose ether ma nā ʻano mineral like ʻole i ka ʻōnaehana cement e hydrated, akā ma ka ʻōlelo maʻamau, ʻo ka ʻae ʻana ʻo ka cellulose ether mole e hoʻopili nui ʻia i ka wai e like me CSH a me ka calcium hydroxide. Ma nā huahana kemika, ʻaʻole hiki ke hoʻopili ʻia ma ka māhele mineral mua o ka clinker. Eia kekahi, hoʻemi ka cellulose ether i ka neʻe ʻana o nā ion (Ca2+, SO42-, ...) i loko o ka hopena pore ma muli o ka piʻi ʻana o ka viscosity o ka solution pore, a laila e hoʻopaneʻe hou i ke kaʻina hydration.

ʻO ka Viscosity kekahi mea koʻikoʻi nui, e hōʻike ana i nā ʻano kemika o cellulose ether. E like me ka mea i ʻōlelo ʻia ma luna nei, pili nui ka viscosity i ka hiki ke paʻa i ka wai a he hopena nui hoʻi i ka hana o ka mortar hou. Eia naʻe, ua ʻike nā haʻawina hoʻokolohua ʻaʻohe hopena o ka viscosity o cellulose ether i nā kinetics hydration cement. He liʻiliʻi ka hopena o ka paona molekula i ka hydration, a ʻo ka ʻokoʻa nui ma waena o nā kaupaona molekala ʻokoʻa he 10min wale nō. No laila, ʻaʻole ʻo ke kaumaha o ka molekala he mea nui e hoʻomalu ai i ka hydration sima.

"Ke noi ʻana i ka Cellulose Ether i loko o nā huahana mortar maloʻo i hui pū ʻia me ka Cement" i kuhikuhi ʻia e pili ana ka hoʻihoʻi ʻana o ka cellulose ether i kona ʻano kemika. A ʻo ke ʻano maʻamau i hoʻoholo ʻia no ka MHEC, ʻoi aku ka kiʻekiʻe o ke kiʻekiʻe o ka methylation, ʻoi aku ka liʻiliʻi o ka hopena retarding o cellulose ether. Eia kekahi, ʻoi aku ka ikaika o ka hopena hoʻihoʻi o ka hydrophilic substitution (e like me ka hoʻololi ʻana iā HEC) ma mua o ka hoʻololi ʻana i ka hydrophobic (e like me ka hoʻololi ʻana iā MH, MHEC, MHPC). Hoʻopili nui ʻia ka hopena o ka cellulose ether e nā ʻāpana ʻelua, ke ʻano a me ka nui o nā pūʻulu substituent.

Ua ʻike pū ʻia nā hoʻokolohua ʻōnaehana he mea koʻikoʻi ka ʻike o nā substituents i ka ikaika mechanical o nā adhesive tile. No HPMC, koi ʻia kahi pae o ka lako e hōʻoia i kona hiki ke hoʻoheheʻe wai a me ka māmā māmā. Hoʻoholo ka ʻike o nā mea pani i ka ikaika o HPMC. Hoʻoholo pū ka mahana gel i ka hoʻohana ʻana o ka HPMC. I loko o kahi kikoʻī, ʻo ka hoʻonui ʻana i ka ʻike o nā pūʻulu methoxyl e lawe mai i kahi hiʻohiʻona i lalo o ka ikaika huki, aʻo ka hoʻonui ʻana i ka ʻike o nā hui hydroxypropoxyl e alakaʻi i ka emi ʻana o ka ikaika huki. piʻi ʻana. Loaʻa ka hopena like no nā hola wehe.

ʻO ka loli hoʻololi o ka ikaika mechanical ma lalo o ke kūlana manawa hāmama e kūlike me ia ma lalo o nā kūlana mahana maʻamau. ʻO ka HPMC me ka methoxyl kiʻekiʻe (DS) maʻiʻo a me ka haʻahaʻa hydroxypropoxyl (MS) maʻiʻo he maikaʻi ka paʻakikī o ke kiʻiʻoniʻoni, akā e hoʻopilikia ia i ka mortar pulu ma ke ʻano ʻē. waiwai pulu.