I kēia manawa, nui ʻole ka hana paʻa ʻana o ka wai i ka nui o nā masonry a me ka plastering morta, a e kaʻawale ka slurry wai ma hope o kekahi mau minuke o ke kū.No laila, he mea nui e hoʻohui i ka nui kūpono o ka cellulose ether i ka mortar sima.
1. Paʻa wai o ka cellulose ether
ʻO ka mālama ʻana i ka wai he hana koʻikoʻi ia o ka cellulose ether, a he hana hoʻi ia i ka nui o nā mea hana mortar maloʻo maloʻo, ʻoi aku ka poʻe ma nā ʻāpana hema me nā mahana 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 kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai.ʻO ka maʻamau, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka paʻa ʻana o ka wai o ka mortar.Ke piʻi ka nui o ka paʻa ʻana o ka wai, lohi ke ʻano o ka paʻa wai;i ka wā e piʻi aʻe ai ka wela, e emi maʻamau ka paʻa ʻana o ka wai o ka cellulose ether, akā ʻoi aku ka maikaʻi o ka mālama ʻana o ka wai ma lalo o nā kūlana kiʻekiʻe;ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai i nā fibers me nā degere haʻahaʻa o ka hoʻololi ʻana i ka Vegan ether.
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 ka mole wai 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 hiki ke hoʻopaʻa ʻia i nā ikaika paʻa ikaika, a laila e hana ai i ka wai manuahi, ka wai i hoʻopili ʻia, a me ka hoʻomaikaʻi ʻana i ka paʻa ʻana o ka wai o ka slurry sima;Hoʻomaikaʻi ka cellulose ether i ka slurry cement hou ʻO nā waiwai rheological, ka hoʻonohonoho pūnaewele porous a me ke kaomi osmotic a i ʻole nā mea hana kiʻiʻoniʻoni o cellulose ether ke keʻakeʻa nei i ka laha ʻana o ka wai.
2. Mānoanoa a me Thixotropy o Cellulose Etera
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-sagging o ka mortar.Hoʻohana nui ʻia ia i ka plastering mortar, brick bonding mortar a me waho o ka ʻōnaehana insulation pā.Hiki i ka mānoanoa o ka cellulose ether ke hoʻonui i ka anti-dispersion hiki a me ka homogeneity o nā mea hou i hui pū ʻia, pale i ka delamination mea, ka hoʻokaʻawale ʻana a me ke koko, a hiki ke hoʻohana ʻia i 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 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 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 hana 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 me ka non-thixotropic ka wai o ka wai o ka methyl cellulose ma lalo o kona wela gel, akā e hōʻike ana i nā waiwai kahe o Newtonian ma nā ʻāpana ʻoki 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, nā cellulose ethers o ka like viscosity grade, ʻaʻohe mea MC, HPMC, 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 hiki mai nā kahe thixotropic kiʻekiʻe.
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 ka molecular kaumaha 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.
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 kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai.ʻO ka maʻamau, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka paʻa ʻana o ka wai o ka mortar.Ke piʻi ka nui o ka paʻa ʻana o ka wai, lohi ke ʻano o ka paʻa wai;i ka wā e piʻi aʻe ai ka wela, e emi maʻamau ka paʻa ʻana o ka wai o ka cellulose ether, akā ʻoi aku ka maikaʻi o ka mālama ʻana o ka wai ma lalo o nā kūlana kiʻekiʻe;ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai i nā fibers me nā degere haʻahaʻa o ka hoʻololi ʻana i ka Vegan ether.
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 ka mole wai 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 hiki ke hoʻopaʻa ʻia i nā ikaika paʻa ikaika, a laila e hana ai i ka wai manuahi, ka wai i hoʻopili ʻia, a me ka hoʻomaikaʻi ʻana i ka paʻa ʻana o ka wai o ka slurry sima;Hoʻomaikaʻi ka cellulose ether i ka slurry cement hou ʻO nā waiwai rheological, ka hoʻonohonoho pūnaewele porous a me ke kaomi osmotic a i ʻole nā mea hana kiʻiʻoniʻoni o cellulose ether ke keʻakeʻa nei i ka laha ʻana o ka wai.
3. ʻO ka hopena ea-entraining o cellulose ether
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 e hana ai, 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 i ka wai a i ʻole ka lubricating hopena ma nā ʻāpana sima, e hoʻonui ai i ka wai o nā mea i hoʻokumu ʻia i ka sima me kona hopena ea, akā ʻo kāna hopena mānoanoa e hōʻemi i ka wai.ʻO ka hopena i ka wai o nā mea i hoʻokumu ʻia i ka sima he hui pū ʻana 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 hoʻemi wai;ke kiʻekiʻe ka maʻiʻo, piʻi wikiwiki 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. Hoʻopaneʻe ka hopena o ka cellulose ether
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 nalo ʻana o ka slump koneki i ka manawa, akā hiki paha. hoʻopaneʻe ka holomua o ke kūkulu ʻana.
Ka manawa hoʻouna: Feb-03-2023