ʻO ka viscosity kahi mea nui o ka hana 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 ʻo ka emi ʻana o kona solubility e loaʻa i kahi hopena maikaʻi ʻole i ka ikaika a me ka hana ʻana o ka mīkini. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa ma ka mortar, akā ʻaʻole pololei ia.
ʻOi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka ʻoi aku o ka viscous o ka mortar pulu. I ka wā o ke kūkulu ʻana, ʻike ʻia ʻo ia e pili ana i ka scraper a me ka hoʻopili kiʻekiʻe i ka substrate. Akā ʻaʻole ia e kōkua nui i 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 anti-sag o ka mortar pulu. Ma kahi ʻē aʻe, ʻoi aku ka maikaʻi o ka hoʻomaikaʻi ʻana i ka ikaika o ka mortar pulu.
ʻO nā mea pā hale ka hapa nui o nā hale porous, a he ikaika ko lākou a pau i ka wai. Eia naʻe, ua hoʻomākaukau ʻia nā mea hana hale gypsum i hoʻohana ʻia no ke kūkulu ʻana i ka pā ma ka hoʻohui ʻana i ka wai i ka paia, a ua maʻalahi ka wai i ka pā, e hopena i ka nele o ka wai e pono ai no ka hydration o ka gypsum, ka hopena i ka paʻakikī i ka hana plastering a hoʻemi ʻia. ka ikaika pili, ka hopena i nā māwae, Nā pilikia maikaʻi e like me ka hollowing a me ka ʻili. ʻO ka hoʻomaikaʻi ʻana i ka mālama ʻana i ka wai o nā mea hale gypsum hiki ke hoʻomaikaʻi i ka maikaʻi o ke kūkulu ʻana a me 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.
Hoʻohana ʻia ka gypsum plastering, ka gypsum i hoʻopaʻa ʻia, ka gypsum caulking, ka gypsum putty a me nā mea hana pauka hana ʻē aʻe. I mea e maʻalahi ai ke kūkulu ʻana, ua hoʻohui ʻia nā gypsum retarders i ka wā o ka hana ʻana e hoʻolōʻihi i ka manawa hana o ka gypsum slurry. No ka mea ua hui pū ʻia ka gypsum me ka Retarder, ka mea e pale ai i ka hana hydration o ka hemihydrate gypsum. Pono e mālama ʻia kēia ʻano slurry gypsum ma ka pā no 1 ~ 2H ma mua o ka hoʻonohonoho ʻana. Loaʻa ka hapa nui o nā paia i nā mea hoʻoheheʻe wai, ʻoi aku ka nui o nā pā pōhaku a me ka ʻea. ʻO ka pā, ka papa insulation porous a me nā mea ʻē aʻe māmā hou o ka pā, no laila e mālama ʻia ka mālama ʻana i ka wai ma luna o ka gypsum slurry e pale aku i ka hoʻololi ʻana o kahi ʻāpana o ka wai i loko o ka slurry i ka paia, ka hopena i ka nele o ka wai a me ka hydration ʻole i ka wā o ka gypsum. paakiki ka slurry. Hoʻokaʻawale a ʻili ʻia ka hui ma waena o ka gypsum a me ka ʻili o ka paia. ʻO ka hoʻohui ʻana o ka mea hoʻopaʻa wai e mālama i ka wai i loko o ka gypsum slurry, e hōʻoia i ka hopena hydration o ka slurry gypsum ma ka interface, i mea e hōʻoia ai i ka ikaika paʻa. ʻO nā mea mālama wai maʻamau he cellulose ethers, e like me methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), etc. Eia kekahi, polyvinyl alcohol, sodium alginate, starch modified, diatomaceous earth, rare earth hiki ke hoʻohana ʻia ka pauda, a me nā mea ʻē aʻe e hoʻomaikaʻi i ka hana mālama wai.
ʻAʻohe ʻano o ka mea hoʻopaʻa wai hiki ke hoʻopaneʻe i ka hydration rate o ka gypsum i nā degere like ʻole, ke hoʻololi ʻole ke ʻano o ka retarder, hiki i ka mea hoʻopaʻa wai ke hoʻopaneʻe i ka hoʻonohonoho no 15-30 mau minuke. No laila, hiki ke hoʻemi ʻia ka nui o ka retarder.
Ka manawa hoʻouna: Feb-08-2023