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 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 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 ke kūkulu ʻana i ka pā ma ka hoʻohui ʻana i ka wai i ka paia, 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 ka paʻakikī 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, 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 paia no 1 a 2 mau hola ma mua o ke kau 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, hiki ke hoʻohana ʻia ka polyvinyl alcohol, sodium alginate, modified starch, diatomaceous earth, rare earth powder, etc.
Ka manawa hoʻouna: Feb-28-2023