I loko o ka mīkini paʻipaʻi mākaukau, hiki i kahi cellulose ether liʻiliʻi ke hoʻomaikaʻi nui i ka hana o ka mortar pulu. Hiki ke ʻike ʻia ʻo ka cellulose ether ka mea hoʻohui nui e pili ana i ka hana hana o ka mortar.
ʻO ke koho ʻana i nā ʻano like ʻole o ka cellulose ethers me nā viscosities like ʻole, nā ʻāpana ʻokoʻa like ʻole, nā degere like ʻole o ka viscosity a me nā nui i hoʻohui ʻia e loaʻa nā hopena like ʻole i ka hoʻomaikaʻi ʻana i ka hana o ka mortar drymix. I kēia manawa, ʻoi aku ka maikaʻi o ka hoʻopaʻa ʻana i ka wai i ka nui o nā masonry a me ka plastering mortars. E hoʻokaʻawale ka wai a me ka slurry ma hope o kekahi mau minuke o ke kū. No laila he mea nui ka hoʻohui ʻana i ka cellulose ether i ka mortar sima.
E nānā pono kākou i ke kuleana o ka cellulose ether i loko o ka momi sima!
1. Cellulose ether--Paʻa wai
He hana koʻikoʻi ka paʻa ʻana o ka wai i ka methyl cellulose ether, a he hana hoʻi ia i hana ʻia e ka nui o nā mea hana mokomoko maloʻo maloʻo, ʻoi aku ka poʻe ma nā ʻāpana hema me nā wela kiʻekiʻe. I ka hana ʻana i nā mea kūkulu hale, ʻoi aku hoʻi i ka mortar pauka maloʻo, cellulose ether kahi hana i hiki ʻole ke hoʻololi ʻia, ʻoi aku hoʻi i ka hana ʻana i ka mortar kūikawā (modified mortar), he mea nui a koʻikoʻi.
ʻO ka viscosity, dosage, ambient temperature and molecular structure of cellulose ether he hopena nui i kāna hana mālama wai. Ma lalo o nā kūlana like, ʻoi aku ka nui o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai; ʻOi aku ka nui o ka dosage, ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai. ʻO ka maʻamau, hiki i kahi mea liʻiliʻi o cellulose ether ke hoʻomaikaʻi nui i ka paʻa ʻana o ka wai o ka mortar. Ke hiki aku ka dosage i kekahi, ke piʻi ka degere o ka paʻa ʻana o ka wai, lohi ke ʻano o ka paʻa wai; Ke piʻi aʻe ka mahana ambient, e emi maʻamau ka paʻa ʻana o ka wai o cellulose ether. Akā ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai ma lalo o nā kūlana wela kiʻekiʻe; ʻO ka cellulose ether me nā pae haʻahaʻa o ka hoʻololi ʻana i ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai.
ʻO ka hui hydroxyl ma ka cellulose ether mole a me ka oxygen atom ma ka paʻa etera e hui pū me ka mole wai e hana i kahi paʻa hydrogen, e hoʻohuli i ka wai manuahi i wai paʻa, a laila e pāʻani maikaʻi i ka mālama ʻana i ka wai;ʻO kaka wai mole a me ka cellulose ether molecular chain Interdiffusion e hiki ai i nā mole wai ke komo i loko o ke kaulahao macromolecular cellulose ether a pili i nā mana hoʻopaʻa ikaika, a laila e hana ai i ka wai manuahi, ka wai i hoʻopili ʻia, a me ka hoʻomaikaʻi ʻana i ka paʻa wai o ka slurry sima; Hoʻomaikaʻi ʻo Cellulose ether i nā waiwai rheological o ka slurry cement hou, ka ʻōnaehana porous a me ka osmotic pressure a i ʻole nā mea hana kiʻiʻoniʻoni o cellulose ether e keʻakeʻa i ka laha ʻana o ka wai.
2. Cellulose ethers - Mānoanoa a me Thixotropy
Hāʻawi ka cellulose ether i ka mortar pulu me ka viscosity maikaʻi loa, hiki ke hoʻonui nui i ka hiki ke hoʻopaʻa ʻia ma waena o ka mortar pulu a me ka papa kumu, a hoʻomaikaʻi i ka hana anti-sag o ka mortar. Hoʻohana nui ʻia ia i ka plastering mortar, brick bonding mortar a me ka ʻōnaehana insulation pā waho. ʻO ka hopena mānoanoa o ka cellulose ether hiki ke hoʻonui i ka mana anti-dispersion a me ka homogeneity o nā mea hou i hui pū ʻia, pale i ka delamination a me ka hoʻokaʻawale ʻana. Hiki ke hoʻohana ʻia i loko o ka fiber concrete, underwater concrete and self-compacting concrete.
ʻO ka hopena mānoanoa o ka cellulose ether ma nā mea i hoʻokumu ʻia i ka sima mai ka viscosity o ka solution cellulose ether. Ma lalo o nā kūlana like, ʻoi aku ka kiʻekiʻe o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka viscosity o ka mea i hoʻololi ʻia i ka sima, akā inā kiʻekiʻe loa ka viscosity, e hoʻopili ia i ka wai a me ka hana o ka mea (e like me ke kau ʻana i ka pahi plastering. ). ʻO ka mortar hoʻokiʻekiʻe ponoʻī a me ka paʻa paʻa ponoʻī, e koi ana i ka wai kiʻekiʻe, pono i 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 sima a hoʻonui i ka hua o ka mortar.
Loaʻa ka thixotropy kiʻekiʻe o ka cellulose ether aqueous solution, ʻo ia hoʻi kahi ʻano nui o ka cellulose ether. He pseudoplastic a non-thixotropic ka wai o ka methyl cellulose ma lalo o kona wela gel, akā e hōʻike ana i nā waiwai kahe o Newtonian ma nā ʻili haʻahaʻa. Hoʻonui ka Pseudoplasticity me ka paona molekala a i ʻole ka ʻike ʻana o ka cellulose ether, me ka nānā ʻole i ke ʻano o ka mea pani a me ke degere o ka hoʻololi. No laila, ʻo nā cellulose ethers o ka papa viscosity like, inā he HPMC a i ʻole HEMC, e hōʻike mau i nā waiwai rheological like me ka lōʻihi o ka mālama ʻana a me ka mahana. Hoʻokumu ʻia nā gels Structural i ka wā e piʻi aʻe ai ka mahana, a loaʻa nā kahe thixotropic.
Hōʻike ka ʻike kiʻekiʻe a me ka haʻahaʻa viscosity cellulose ethers thixotropy ma lalo o ka mahana gel. He pōmaikaʻi nui kēia waiwai i 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 cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai, akā ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka kiʻekiʻe o ke kaumaha molecular pili o cellulose ether, a me ka emi ʻana o kona solubility, he hopena maikaʻi ʻole. e pili ana i ka hoʻopaʻa ʻana o ka mortar a me ka hana hana.
3. Cellulose ether - Ka hopena o ka ea
Loaʻa i ka cellulose ether ka hopena e hoʻokomo i ka ea i nā mea hoʻokumu sima hou. Loaʻa i ka cellulose ether nā pūʻulu hydrophilic (nā pūʻulu hydroxyl, nā pūʻulu ether) a me nā pūʻulu hydrophobic (nā pūʻulu methyl, nā apo glucose), a he surfactant me ka hana ʻili, no laila e loaʻa ai kahi hopena ea. ʻO ka hopena o ka ea o ka cellulose ether e hoʻopuka i kahi hopena "pōleʻa", hiki ke hoʻomaikaʻi i ka hana hana o nā mea hou i hui pū ʻia, e like me ka hoʻonui ʻana i ka plasticity a me ka maʻalahi o ka mortar i ka wā o ka hana, kahi kūpono i ka hoʻolaha ʻana o ka mortar. ; e hoʻonui hoʻi i ka puka o ka mortar, e hoʻemi i ke kumukūʻai hana o ka mortar; akā, e hoʻonui ia i ka porosity o ka mea paʻakikī a hoʻemi i kona mau mea mechanical e like me ka ikaika a me ka modulus elastic.
Ma ke ʻano he surfactant, cellulose ether kekahi hopena pulu a lubricating paha ma nā ʻāpana sima, e hoʻonui ai i ka wai o nā mea i hoʻokumu ʻia me ka hopena o ka ea, akā ʻo kona hopena mānoanoa e hōʻemi i ka wai. ʻO ka hopena o ka fluidity kahi hui o ka plasticizing a me nā hopena mānoanoa. ʻO ka ʻōlelo maʻamau, inā haʻahaʻa loa ka ʻike o ka cellulose ether, ʻo ka hana nui ka plasticization a i ʻole ka hoʻēmi wai; ke kiʻekiʻe ka maʻiʻo, piʻi koke ka hopena mānoanoa o ka cellulose ether, a ʻo kona hopena e komo i ka ea e hoʻopiha ʻia. No laila ke hōʻike nei he hopena mānoanoa a i ʻole ka piʻi ʻana o ka koi wai.
4. Cellulose Etera - Hoʻopaneʻe
ʻO ka cellulose ether e hoʻolōʻihi i ka manawa hoʻonohonoho o ka paʻi sima a i ʻole ka mortar, a hoʻopaneʻe i nā kinetics hydration o ka sima, he mea maikaʻi ia e hoʻomaikaʻi i ka manawa hana o nā mea hou i hui pū ʻia, e hoʻomaikaʻi i ke kūlike o ka mortar a me ka nalowale o ka slump slump i ka manawa, akā hiki paha. hoʻopaneʻe ka holomua o ke kūkulu ʻana.
Ka manawa hoʻouna: Jun-02-2023