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 ʻike ʻia 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 hale gypsum i hoʻohana ʻia no ka hana ʻana i ka pā ma ka hoʻohui ʻana i ka wai i ka pā, a ua maʻalahi ka wai i ka paia, ka hopena i ka nele o ka wai e pono ai no ka hydration o ka gypsum, ka hopena i nā pilikia i ka hana plastering a me ka hoʻemi ʻana i ka ikaika pili, ka hopena i nā māwae, Nā pilikia maikaʻi e like me ka hollowing a me ka peeling. ʻO ka hoʻomaikaʻi ʻana i ka paʻa 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 pā i nā waiwai hoʻoheheʻe wai, ʻoi aku ka nui o nā pā pōhaku a me ka ʻeated concrete. ʻO Wall, porous insulation board a me nā mea ʻē aʻe māmā hou o ka pā, no laila pono e mālama ʻia ka mālama ʻana i ka wai ma ka gypsum slurry e pale aku i ka hoʻoili ʻana o ka ʻāpana o ka wai i ka slurry i ka paia, e hopena i ka nele o ka wai a me ka hydration incomplete ke paʻakikī ka gypsum slurry. E hoʻokaʻawale a ʻili i 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 powder, etc.
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