ʻO ka viscosity kahi mea waiwai nui o ka cellulose ether. ʻO ka ʻōlelo maʻamau, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka hopena paʻa wai o ka gypsum mortar. Eia nō naʻe, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka kiʻekiʻe o ke kaumaha molecular o cellulose ether, a e emi iho ka solubility o cellulose ether. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa, akā ʻaʻole like ia. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka paʻa o ka mortar pulu, i ka hana ʻana, ka hana o ka sticking scraper a me ke kiʻekiʻe adhesion i ka substrate. Akā ʻaʻole kōkua ka hoʻonui ʻana i ka ikaika o ke kūkulu ʻana o ka mortar pulu ponoʻī. Eia kekahi, i ka wā o ke kūkulu ʻana, ʻaʻole maopopo ka hana ʻana o ka hana anti-sagging mortar. ʻO ka ʻokoʻa, ʻo kekahi Methyl cellulose i hoʻololi ʻia me ka haʻahaʻa haʻahaʻa a me ka haʻahaʻa haʻahaʻa i hōʻike ʻia i ka hoʻomaikaʻi ʻana i ka ikaika o ke kūkulu ʻana o ka mortar pulu. ʻO nā mea pā hale ka hapa nui o nā hale porous, loaʻa iā lākou ka wai. A ʻo nā mea kūkulu hale gypsum i hoʻohana ʻia no ke kūkulu ʻana i ka pā, ma hope o ka hoʻohui ʻana i ka modulation wai ma ka paia, ua maʻalahi ka maʻemaʻe e ka paia, ka mea e nele ai ka gypsum i ka wai e pono ai no ka hydration, e hoʻopilikia ai i ka hana plastering a me ka hoʻohaʻahaʻa ʻana i ka ikaika paʻa. ʻO ka hoʻomaikaʻi ʻana i ka mālama ʻana i ka wai o nā mea hale gypsum hiki ke hoʻoponopono i ka pilikia o ka maikaʻi o ke kūkulu ʻana a hoʻomaikaʻi i ka ikaika paʻa me ka pā. No laila, ua lilo ka mea mālama wai i kekahi o nā mea hoʻohui koʻikoʻi o nā mea kūkulu hale gypsum.
I mea e maʻalahi ai ke kūkulu ʻana, hoʻohana ʻia nā mea pauka hale e like me ka plaster, plaster adhesive, jointing plaster a me plaster putty, a ua hoʻohui ʻia ka gypsum retarder i ka hana e hoʻolōʻihi i ka manawa hana o ka plaster paste, no ka mea ua kāohi ʻia ke kaʻina hydration o ka hemihydrate gypsum ma ka hoʻohui ʻana i ka retarder i ka gypsum, ʻo kēia ʻano o ka pā gypsum ma mua o ka hoʻonohonoho ʻana i ka pā ma mua o ka 1 mau hola ma mua o ka hoʻonohonoho ʻana o ka pā gypsum. wai absorption waiwai, ma ka oi aku, hou māmā paia mea e like me ka pā pōhaku lepo, aerated pā pōhaku, perforated thermal insulation panels, no laila, e hoʻokō i ka wai-hoʻopaʻa mālama 'ana o gypsum slurry, e pale aku i kekahi o ka wai slurry i ka paia, ke kumu o ka gypsum paʻi paʻakikī i ka wā o ka nele o ka wai, ka hydration o ka ili i pau ole sep, a me ka hydration wahi. ʻO ka hoʻohui ʻana i ka mea mālama wai ʻo ia ka mālama ʻana i ka wai i loko o ka paʻi gypsum, e hōʻoia i ka hopena hydration o ka paʻi gypsum ma ka interface, pēlā e hōʻoia ai i ka ikaika paʻa. ʻO nā mea mālama wai maʻamau he cellulose ethers, e like me Methyl cellulose (MC) , hypromellose (HPMC), hydroxyethyl methyl cellulose (HEMC), etc. Eia kekahi, hiki ke hoʻohana ʻia ka polyvinyl alcohol, sodium alginate, starch i hoʻololi ʻia, diatomite a me ka pauka honua e hoʻomaikaʻi ai i ka mālama ʻana i ka wai.
Ka manawa hoʻouna: Iulai-26-2023