1 Hoolauna
ʻO ka hoʻopili ʻana i ka tile i hoʻopaʻa ʻia i kēia manawa ka noi nui loa o ka mortar maloʻo maloʻo kūikawā, i haku ʻia me ka sima ma ke ʻano he kumu cementitious mea a hoʻohui ʻia e nā aggregates 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. Ke hoʻohālikelike ʻia me ka mortar sima maʻamau, hiki iā ia ke hoʻomaikaʻi nui i ka ikaika hoʻopaʻa ʻana ma waena o ka mea e alo ana a me ka substrate, a he kūpaʻa paheʻe maikaʻi a me ka wai maikaʻi a me ka pale wai. Hoʻohana nui ʻia ia e hoʻopili i nā mea hoʻonaninani e like me ke kūkulu ʻana i nā tile o loko a me waho o ka pā, nā tile papahele, a me nā mea ʻē aʻe. ʻO ia ka mea i hoʻohana nui ʻia i kēia manawa ka mea hoʻopaʻa Tile.
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. ʻO ka cellulose ether i loko o ka tile adhesive ʻaʻole pili wale i nā waiwai rheological o ka porcelain adhesive, e like me ka hana maʻemaʻe, paʻi pahi, a me nā mea ʻē aʻe, akā he mana ikaika nō hoʻi i nā waiwai mechanical o ka tile adhesive.
2. ʻO ka hopena i ka manawa wehe o ka tile adhesive
Ke noho pū nei ka pauda lāʻau a me ka cellulose etera i loko o ka mortar pulu, hōʻike kekahi mau hiʻohiʻona ʻikepili i ʻoi aku ka ikaika o ka ikehu kinetic e hoʻopili ai i nā huahana hydration cement, a ʻoi aku ka nui o ka cellulose ether i loko o ka wai interstitial, kahi e hoʻopili ai i ka viscosity Mortar a me ka manawa hoʻonohonoho. ʻOi aku ka kiʻekiʻe o ka ʻili o ka cellulose ether ma mua o ka pauka lāʻau, a ʻoi aku ka hoʻonui ʻana o ka cellulose ether ma ka mortar interface i ka hoʻokumu ʻana i nā paʻa hydrogen ma waena o ka ʻili kumu a me ka cellulose ether.
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 mānoanoa hapa o ia e neʻe aku i ka thinner mortar papa, a me ka kiʻiʻoniʻoni i hana i ka hoʻomaka 'ana i hapa hoʻoheheʻe, a me ka neʻeʻana o ka wai. e hoʻonui hou aku i ka cellulose ether enrichment ma luna o ka mortar.
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.
3. Ka mana i ka ikaika kaha kaha
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 pae 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 kiʻekiʻe ma waena o nā kaupaona ʻokoʻa he 10min wale nō. No laila, ʻaʻole ʻo ka paona molekala he ʻāpana koʻikoʻi no ka mālama ʻana i ka hydration sima.
ʻO ka hoʻihoʻi ʻana o ka cellulose ether e pili ana i kona ʻano kemika, a ua hoʻoholo ke ʻano maʻamau, no ka MHEC, ʻoi aku ka kiʻekiʻe o ke degere o ka methylation, ʻo ka liʻiliʻi o ka hopena o ka 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 kā mākou mau hoʻokolohua ʻōnaehana he kuleana koʻikoʻi ka ʻike o nā substituent i ka ikaika mechanical o nā mea hoʻopili tile. Ua loiloi mākou i ka hana o ka HPMC me nā pae like ʻole o ka hoʻololi ʻana i nā tile adhesives, a ua hoʻāʻo i ka hopena o ka cellulose ethers i loaʻa nā hui like ʻole ma lalo o nā kūlana hoʻōla like ʻole i nā hopena i nā waiwai mechanical o nā tile adhesives.
I ka hoʻāʻo ʻana, manaʻo mākou i ka HPMC, ʻo ia ka ether hui, no laila pono mākou e hoʻohui i nā kiʻi ʻelua. No ka HPMC, pono ia i kekahi degere o ka absorption e hōʻoia i kona solubility wai a me ka māmā transmittance. ʻIke mākou i ka ʻike o nā substituent Hoʻoholo ia i ka mahana gel o HPMC, kahi e hoʻoholo ai i ka hoʻohana ʻana o HPMC. Ma kēia ʻano, ua hoʻonohonoho ʻia ka ʻike o ka hui o HPMC e pili mau ana i loko o kahi ākea. Ma kēia pae, pehea e hui pū ai i ka methoxy a me ka hydroxypropoxy I mea e loaʻa ai ka hopena maikaʻi loa ka ʻike o kā mākou noiʻi. Hōʻike ka Figure 2 i loko o kahi kikoʻī, ʻo ka piʻi ʻana o ka maʻiʻo o nā hui methoxyl e alakaʻi i kahi hiʻohiʻona i lalo o ka ikaika huki, ʻoiai ka piʻi ʻana o ka ʻike o nā hui hydroxypropoxyl e alakaʻi i ka piʻi ʻana o ka ikaika huki. . 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.
Ka manawa hoʻouna: Jan-09-2023