ʻO ka viscosity kahi mea nui o ka hana o ka cellulose ether.
Ma ke ʻano laulā, ʻo ke kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka hopena paʻa wai o ka gypsum mortar. Eia nō naʻe, ʻo ke kiʻekiʻe o ka viscosity, ʻoi aku ke kiʻekiʻe o ke kaumaha molekala o ka cellulose ether, a ʻo ka emi ʻana o kona solubility e loaʻa ka hopena maikaʻi ʻole i ka ikaika a me ka hana kūkulu o ka mortar. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa ma ka mortar, akā ʻaʻole ia e like me ka mea i hoʻohālikelike pololei ʻia.
ʻO ke kiʻekiʻe o ka mānoanoa, ʻo ka ʻoi aku ka mānoanoa o ka mortar pulu. I ka wā o ke kūkulu ʻana, ua ʻike ʻia ʻo ia he pipili i ka scraper a me ka hoʻopili kiʻekiʻe ʻana i ka substrate. Akā, ʻaʻole ia e kōkua nui i ka hoʻonui ʻana i ka ikaika kūkulu o ka mortar pulu ponoʻī. Eia kekahi, i ka wā o ke kūkulu ʻana, ʻaʻole maopopo ka hana anti-sag o ka mortar pulu. I ka ʻaoʻao ʻē aʻe, ʻo kekahi mau viscosity waena a me ka haʻahaʻa akā ua hoʻololi ʻia nā methyl cellulose ethers he hana maikaʻi loa i ka hoʻomaikaʻi ʻana i ka ikaika kūkulu o ka mortar pulu.
ʻO ka hapa nui o nā mea hana pā hale he mau hale porous, a he ikaika ko lākou a pau i ka omo ʻana i ka wai. Eia nō naʻe, ua hoʻomākaukau ʻia ka mea hana gypsum i hoʻohana ʻia no ke kūkulu ʻana i ka pā ma ka hoʻohui ʻana i ka wai i ka pā, a ua maʻalahi ka omo ʻana o ka wai e ka pā, e hopena ana i ka nele o ka wai e pono ai no ka hydration o ka gypsum, e hopena ana i nā pilikia i ke kūkulu ʻana i ka plastering a me ka emi ʻana o ka ikaika o ka hoʻopaʻa ʻana, e hopena ana i nā māwae, nā pilikia maikaʻi e like me ka hollowing a me ka ʻili ʻana. ʻO ka hoʻomaikaʻi ʻana i ka paʻa ʻana o ka wai o nā mea hana gypsum hiki ke hoʻomaikaʻi i ka maikaʻi o ke kūkulu ʻana a me ka ikaika hoʻopaʻa me ka pā. No laila, ua lilo ka mea paʻa wai i hoʻokahi o nā mea hoʻohui koʻikoʻi o nā mea hana gypsum.
Hoʻohana ʻia ka gypsum plastering, gypsum i hoʻopaʻa ʻia, gypsum caulking, gypsum putty a me nā mea pauka kūkulu ʻē aʻe. I mea e maʻalahi ai ke kūkulu ʻana, hoʻohui ʻia nā mea hoʻopale gypsum i ka wā hana e hoʻolōʻihi i ka manawa kūkulu o ka slurry gypsum. ʻOiai ua hui pū ʻia ka gypsum me ka Retarder, ka mea e kāohi ai i ke kaʻina hana hydration o ka hemihydrate gypsum. Pono e mālama ʻia kēia ʻano slurry gypsum ma ka paia no 1 ~ 2H ma mua o kona hoʻonohonoho ʻana. Loaʻa i ka hapa nui o nā paia nā waiwai omo wai, ʻoiai nā paia brick a me ka sima aerated. ʻO ka paia, ka papa insulation porous a me nā mea paia māmā hou ʻē aʻe, no laila pono e hana ʻia ka mālama ʻana i ka wai ma ka slurry gypsum e pale aku i ka hoʻoili ʻana o kahi hapa o ka wai i loko o ka slurry i ka paia, e hopena ana i ka nele o ka wai a me ka hydration piha ʻole i ka wā e paʻakikī ai ka slurry gypsum. Hoʻokumu i ka hoʻokaʻawale a me ka ʻili ʻana o ka hui ma waena o ka gypsum a me ka ʻili o ka paia. ʻO ka hoʻohui ʻana o ka mea mālama wai e mālama i ka makū i loko o ka slurry gypsum, e hōʻoia i ka hopena hydration o ka slurry gypsum ma ka interface, i mea e hōʻoia ai i ka ikaika o ka hoʻopaʻa ʻana. ʻO nā mea hoʻopaʻa wai i hoʻohana pinepine ʻia he cellulose ethers, e like me ka methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), hydroxyethyl methyl cellulose (HEMC), a pēlā aku. Eia kekahi, hiki ke hoʻohana ʻia ka polyvinyl alcohol, sodium alginate, modified starch, diatomaceous earth, rare earth powder, a pēlā aku e hoʻomaikaʻi i ka hana paʻa wai.
ʻOiai ke ʻano o ka mea hoʻopaʻa wai e hiki ke hoʻopaneʻe i ka nui o ka hydration o ka gypsum i nā kekelē like ʻole, ke mau ka loli o ka nui o ka mea hoʻopaneʻe, hiki i ka mea hoʻopaʻa wai ke hoʻopaneʻe i ke kūlana no 15-30 mau minuke. No laila, hiki ke hoʻemi kūpono ʻia ka nui o ka mea hoʻopaneʻe.
Ka manawa hoʻouna: Pepeluali-08-2023