I loko o ka mortar i hui mua ʻia, e like me ka lōʻihi o kahi liʻiliʻiʻEtera cellulosehiki ke hoʻomaikaʻi nui i ka hana o ka mortar pulu, hiki ke ʻike ʻia ʻo ka cellulose ether kahi mea hoʻohui nui e hoʻopilikia i ka hana kūkulu o ka mortar.
ʻO ke koho ʻana o nā ʻano like ʻole, nā viscosities like ʻole, nā nui ʻāpana like ʻole, nā kekelē like ʻole o ka viscosity a me ka hoʻohui ʻana o nā cellulose ethers he hopena like ʻole hoʻi i ka hoʻomaikaʻi ʻana i ka hana o ka mortar pauka maloʻo. I kēia manawa, he nui nā mortar masonry a me plastering i loaʻa ka hana paʻa wai maikaʻi ʻole, a e hoʻokaʻawale ka slurry wai ma hope o kekahi mau minuke o ke kū ʻana. No laila he mea nui loa e hoʻohui i ka cellulose ether i loko o ka mortar sima.
ka paʻa ʻana o ka wai
ʻO ka paʻa ʻana o ka wai kahi hana koʻikoʻi o ka methyl cellulose ether, a he hana nō hoʻi ia e nānā nui ʻia e nā mea hana wili maloʻo kūloko, ʻoiai ka poʻe ma nā ʻāina hema me nā mahana kiʻekiʻe.
I ka hana ʻana o nā mea kūkulu hale, ʻoi aku ka mortar pauka maloʻo, hoʻokani ka cellulose ether i kahi kuleana nui, ʻoi aku hoʻi i ka hana ʻana o ka mortar kūikawā (moltar i hoʻololi ʻia), he mea nui ia a he mea nui hoʻi.
ʻO ka viscosity, ka dosage, ka mahana ambient a me ke ʻano molekala o ka cellulose ether he mana nui ia i kāna hana paʻa wai. Ma lalo o nā kūlana like, ʻo ka nui o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa wai; ʻo ke kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka paʻa wai. ʻO ka maʻamau, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka paʻa wai o ka mortar. Ke hiki ka dosage i kahi kikoʻī Ke piʻi ka pae o ka paʻa wai, lohi ke ʻano o ka paʻa wai; ke piʻi ka mahana ambient, emi pinepine ka paʻa wai o ka cellulose ether, akā ʻoi aku ka maikaʻi o ka paʻa wai o kekahi mau cellulose ethers i hoʻololi ʻia ma lalo o nā kūlana wela kiʻekiʻe; ʻoi aku ka maikaʻi o ka hana paʻa wai o nā fibers me nā kekelē haʻahaʻa o ka pani ʻana ʻo Vegan ether.
ʻO ka hui hydroxyl ma ka molekole cellulose ether a me ka ʻātoma oxygen ma ka pilina ether e hui pū me ka molekole wai e hana i kahi pilina hydrogen, e hoʻohuli i ka wai manuahi i wai paʻa, no laila e pāʻani ana i kahi kuleana maikaʻi i ka paʻa ʻana o ka wai; ʻo ka molekole wai a me ke kaulahao molekole cellulose ether Interdiffusion e ʻae i nā molekole wai e komo i loko o ke kaulahao macromolecular cellulose ether a ua kau ʻia i nā mana paʻa ikaika, no laila e hana ana i ka wai manuahi, ka wai i hoʻopaʻa ʻia, a hoʻomaikaʻi i ka paʻa ʻana o ka wai o ka slurry sima; hoʻomaikaʻi ka cellulose ether i ka slurry sima hou ʻO nā waiwai rheological, ka hoʻonohonoho pūnaewele porous a me ke kaomi osmotic a i ʻole nā waiwai hana kiʻiʻoniʻoni o ka cellulose ether e pale i ka hoʻolaha ʻana o ka wai.
ka mānoanoa a me ka thixotropy
ʻEtera celluloseHāʻawi i ka mortar pulu me ka viscosity maikaʻi loa, hiki ke hoʻonui nui i ka hiki ke hoʻopaʻa ma waena o ka mortar pulu a me ka papa kumu, a hoʻomaikaʻi i ka hana anti-sagging o ka mortar. Hoʻohana nui ʻia ia i ka mortar plastering, mortar bonding brick a me ka ʻōnaehana insulation paia waho. Hiki i ka hopena mānoanoa o ka cellulose ether ke hoʻonui i ka hiki anti-dispersion a me ka homogeneity o nā mea i hui hou ʻia, pale i ka delamination mea, segregation a me ke kahe ʻana o ke koko, a hiki ke hoʻohana ʻia i ka fiber concrete, ka concrete underwater a me ka concrete self-compacting.
ʻO ka hopena mānoanoa o ka cellulose ether ma nā mea i hoʻokumu ʻia i ka sima mai ka viscosity o ka hopena cellulose ether. Ma lalo o nā kūlana like, ʻo ke kiʻekiʻe o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka viscosity o ka mea i hoʻokumu ʻia i ka sima i hoʻololi ʻia, akā inā kiʻekiʻe loa ka viscosity, e hoʻopilikia ia i ka wai a me ka hana o ka mea (e like me ke kau ʻana i ka pahi plastering). ʻO ka mortar leveling ponoʻī a me ka sima hoʻopaʻa ponoʻī, e pono ai ka wai kiʻekiʻe, pono ka viscosity haʻahaʻa o ka cellulose ether. Eia kekahi, ʻo ka hopena mānoanoa o ka cellulose ether e hoʻonui i ka koi wai o nā mea i hoʻokumu ʻia i ka sima a hoʻonui i ka hua o ka mortar.
ʻO ka wai hoʻoheheʻe cellulose ether kiʻekiʻe-viscosity he thixotropy kiʻekiʻe, ʻo ia hoʻi kekahi ʻano nui o ka cellulose ether. ʻO nā wai hoʻoheheʻe o ka methyl cellulose he pseudoplastic a me ka non-thixotropic fluidity ma lalo o kona mahana gel, akā hōʻike i nā waiwai kahe Newtonian ma nā wikiwiki shear haʻahaʻa. Hoʻonui ka Pseudoplasticity me ke kaumaha molekala a i ʻole ka nui o ka cellulose ether, me ka nānā ʻole i ke ʻano o ka substituent a me ke kekelē o ka pani ʻana. No laila, ʻo nā cellulose ethers o ka papa viscosity like, ʻaʻohe mea MC, HPMC, HEMC, e hōʻike mau i nā waiwai rheological like inā e mālama mau ʻia ka nui a me ka mahana. Hoʻokumu ʻia nā gels structural i ka wā e hoʻokiʻekiʻe ʻia ai ka mahana, a loaʻa nā kahe thixotropic kiʻekiʻe.
Hōʻike ka nui o ka cellulose ethers i ka thixotropy ma lalo o ka mahana o ka gel. He mea maikaʻi loa kēia waiwai no ka hoʻoponopono ʻana i ka pae ʻana a me ka sagging i ke kūkulu ʻana i ka mortar hale. Pono e wehewehe ʻia ma ʻaneʻi ʻo ke kiʻekiʻe o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai, akā ʻo ke kiʻekiʻe o ka viscosity, ʻoi aku ke kiʻekiʻe o ke kaumaha molekala pili o ka cellulose ether, a me ka emi ʻana o kona solubility, kahi i loaʻa ai ka hopena maikaʻi ʻole i ka noʻonoʻo mortar a me ka hana kūkulu.
Hoʻokomo ea
Loaʻa i ka Cellulose ether ka hopena ea-entraining maopopo ma luna o nā mea sima hou. Loaʻa i ka Cellulose ether nā hui hydrophilic (nā hui hydroxyl, nā hui ether) a me nā hui hydrophobic (nā hui methyl, nā apo glucose), a he surfactant me ka hana ʻili, no laila he hopena ea-entraining. ʻO ka hopena ea-entraining o ka cellulose ether e hana i kahi hopena "pōpō", hiki ke hoʻomaikaʻi i ka hana hana o nā mea i hui hou ʻia, e like me ka hoʻonui ʻana i ka plasticity a me ka laumania o ka mortar i ka wā o ka hana, kahi e kūpono ai i ka hoʻolaha ʻana o ka mortar; e hoʻonui pū ia i ka hana o ka mortar, e hōʻemi i ke kumukūʻai hana o ka mortar; akā e hoʻonui ia i ka porosity o ka mea paʻakikī a hōʻemi i kona mau waiwai mechanical e like me ka ikaika a me ka modulus elastic.
Ma ke ʻano he surfactant, loaʻa i ka cellulose ether kahi hopena pulu a lubricating paha i nā ʻāpana sima, kahi e hoʻonui ai i ke kahe o nā mea sima me kona hopena ea-entraining, akā ʻo kona hopena mānoanoa e hōʻemi i ke kahe. ʻO ka hopena o ke kahe he hui pū ʻana o nā hopena plasticizing a me ka mānoanoa. Ma ke ʻano laulā, i ka wā e haʻahaʻa loa ai ka nui o ka cellulose ether, ʻo ka hana nui ka plasticization a i ʻole ka hōʻemi ʻana i ka wai; i ka wā e kiʻekiʻe ai ka nui, piʻi koke ka hopena mānoanoa o ka cellulose ether, a ʻo kona hopena ea-entraining e maʻa mau. No laila hōʻike ʻia ia ma ke ʻano he hopena mānoanoa a i ʻole ka hoʻonui ʻana i ke koi wai.
lohi
ʻEtera cellulosee hoʻolōʻihi i ka manawa hoʻonohonoho o ka paʻi sima a i ʻole ka mortar, a e hoʻopaneʻe i ke kinetics hydration o ka sima, he mea pono ia e hoʻomaikaʻi i ka manawa hana o nā mea i hui hou ʻia, hoʻomaikaʻi i ke kūlike o ka mortar a me ka nalowale ʻana o ka slump sima i ka hala ʻana o ka manawa, akā hiki nō hoʻi ke hoʻopaneʻe i ke kūkulu ʻana.
Ka manawa hoʻouna: ʻApelila-25-2024