I loko o ka mīkini paʻipaʻi i hoʻomākaukau ʻia, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka hana o ka mortar pulu. Hiki ke ʻike ʻia ʻo ka cellulose ether kahi mea hoʻohui nui e pili ana i ka hana hana o ka mortar. ʻO ke koho ʻana i nā cellulose eter o nā ʻano ʻano like ʻole, nā viscosity ʻokoʻa, nā ʻāpana ʻāpana like ʻole, nā degere viscosity ʻokoʻa a me nā nui i hoʻohui ʻia he mau hopena like ʻole i ka hoʻomaikaʻi ʻana i ka hana o ka mortar maloʻo. I kēia manawa, ʻoi aku ka maikaʻi o nā masonry a me ka plastering mortas me nā waiwai paʻa wai maikaʻi ʻole. E hoʻokaʻawale ka slurry wai ma hope o ka waiho wale ʻana no kekahi mau minuke. No laila, he mea nui e hoʻohui i ka cellulose ether i ka mortar sima. E nānā pono kākou i nā hana o ka cellulose ether i loko o ka mortar sima!
1.ʻO ka mālama ʻana i ka wai eter-cellulose
He waiwai koʻikoʻi ka paʻa ʻana o ka wai o cellulose ether, a he waiwai nō hoʻi ia e ka nui o nā mea hana mortar maloʻo maloʻo, ʻoi aku ka poʻe ma ka ʻāina hema me nā mahana kiʻekiʻe. I ka hana ʻana i nā mea kūkulu hale, ʻoi aku ka maloʻo-mix mortar, cellulose ether ka mea 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 pae paʻa wai o ka mortar. Ke piʻi ka dosage i kahi pae, e lohi ke ʻano o ka hoʻonui ʻana i ka wai paʻa; ʻO ka paʻa ʻana o ka wai o ka cellulose ether ke emi maʻamau me ka piʻi ʻana o ka mahana o ka ʻāina, akā ʻo kekahi mau cellulose ethers i hoʻololi ʻia he paʻa wai maikaʻi ma lalo o nā kūlana wela kiʻekiʻe; ʻoi aku ka maikaʻi o ka mālama ʻana i ka wai i nā cellulose ethers me ka pae haʻahaʻa.
ʻO nā pūʻulu hydroxyl ma nā molekele cellulose eter a me nā atomo oxygen ma nā paʻa etera e hana i nā paʻa hydrogen me nā mole wai, e hoʻohuli i ka wai manuahi i wai paʻa, no laila ke pāʻani maikaʻi nei i ka mālama ʻana i ka wai; ʻO ka hoʻoheheʻe like ʻana ma waena o nā molekala wai a me nā kaulahao molecular cellulose ether e hiki ai i nā molekole wai ke komo i loko o ke kaulahao macromolecular cellulose ether a kau ʻia i nā kaohi ikaika, pēlā e hana ai i ka wai manuahi a me ka wai i hoʻopili ʻia, a laila e hoʻomaikaʻi ai i ka paʻa ʻana o ka wai o ka slurry sima; Hoʻomaikaʻi ʻo cellulose ether i nā waiwai rheological, ʻano pūnaewele porous a me ke kaomi osmotic o ka slurry cement hou, a i ʻole nā mea hana kiʻiʻoniʻoni o cellulose ether e keʻakeʻa i ka laha ʻana o ka wai.
2.ʻO ka cellulose ether-thickening a me ka thixotropy
Hāʻawi ka cellulose ether i ka viscosity wet mortar, 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, tile bonding mortar a me nā ʻōnaehana insulation pā waho. ʻO ka hopena mānoanoa o ka cellulose ether hiki ke hoʻonui i ka dispersion resistance a me ka homogeneity o nā mea hou, pale i ka delamination mea, ka hoʻokaʻawale ʻana a me ke koko, a 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 ka cellulose ether, ʻoi aku ka maikaʻi o ka viscosity o ka mea i hoʻololi ʻia i ka sima. Eia nō naʻe, inā kiʻekiʻe loa ka viscosity, pili ia i ka wai a me ka hana o ka mea (e like me ka pipili ʻana i ka pahi plaster). ʻO nā mīkini hoʻopaʻapaʻa ponoʻī a me ka paʻa paʻa ponoʻī e koi ana i ka wai kiʻekiʻe e koi i ka viscosity haʻahaʻa o cellulose ether. Eia kekahi, ʻo ka hopena mānoanoa o ka cellulose ethers e hoʻonui i ka koi wai o nā mea i hoʻokumu ʻia i ka cement a hoʻonui i nā hua mortar.
Loaʻa ka thixotropy kiʻekiʻe o ka cellulose ether aqueous solution, ʻo ia hoʻi kahi ʻano nui o ka cellulose ether. He pseudoplastic, non-thixotropic kahe ana o na wai wai o ka methylcellulose ma lalo o ko lakou mehana gel, aka, e hoike mai ana i na waiwai kahe o Newtonian ma na au liilii. Hoʻonui ka Pseudoplasticity me ka piʻi ʻana o ke kaumaha molecular a i ʻole ka ʻike ʻana o ka cellulose ether, me ka nānā ʻole i ke ʻano a me ke kiʻekiʻe o ka hoʻololi ʻana o ka mea pani. No laila, e hōʻike mau ana nā cellulose ethers o ka pae viscosity like, inā he MC, HPMC, a i ʻole HEMC, i nā waiwai rheological like i ka wā e mālama mau ʻia ai ka ʻike a me ka mahana. Ke hoʻonui ʻia ka mahana, hoʻokumu ʻia kahi gel structural a puka mai ke kahe thixotropic kiʻekiʻe.
Hōʻike nā ʻano kiʻekiʻe a me ka haʻahaʻa viscosity cellulose ethers i ka thixotropy ma lalo o ka mahana gel. He pōmaikaʻi nui kēia waiwai i ka hoʻoponopono ʻana i ka pae ʻana a me nā waiwai sagging o ke kūkulu ʻana i ka pahū i ka wā o ke kūkulu ʻana. Pono e hoʻomaopopo 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 ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka kiʻekiʻe o ke kaumaha molecular pili o ka cellulose ether, a ua emi kona solubility e like me ia, kahi hopena maikaʻi ʻole. ka hoʻopaʻa ʻana o ka mortar a me ka hana hana.
3.ʻO ka hopena hoʻokomo ʻana i ka ether-air cellulose
He hopena koʻikoʻi ko ka cellulose ether ma luna o nā mea hana 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). He surfactant me ka hana o ka ili a no laila he hopena e komo ai ka ea. ʻO ka hopena o ka ea entraining o 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, he mea pono i ka paving o ka mortar; e hoʻonui hoʻi ia i ka hoʻopuka ʻana i ka mīkini a hoʻemi i ke kumu kūʻai o ka mortar; akā, e hoʻonui ia i ka porosity o nā mea paʻakikī a hoʻemi i ko lākou mau waiwai 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 hui pū me kāna hopena entraining ea e hoʻonui i ka wai o nā mea i hoʻokumu ʻia, akā ʻo kāna hopena mānoanoa e hōʻemi i ka wai. ʻO ka hopena o ka cellulose ether i ka wai o nā mea i hoʻokumu ʻia i ka cement he hui pū ʻana o ka plasticization a me nā hopena mānoanoa. ʻO ka ʻōlelo maʻamau, i ka haʻahaʻa loa ʻana o ke ʻano o ka cellulose ether, e hōʻike nui ʻia e like me ka plasticizing a i ʻole ka hopena hoʻemi wai; ke kiʻekiʻe ka dosage, piʻi wikiwiki ka hopena o ka cellulose ether, a ʻo kona hopena entraining ea e like me ka saturation, no laila e hōʻike ʻia he hopena mānoanoa a hoʻonui paha i ka koi wai.
4.ʻO ka hopena ether-retarding cellulose
ʻO ka cellulose ether e hoʻolōʻihi i ka manawa hoʻonohonoho o ka paʻi sima a i ʻole ka mortar a hoʻopaneʻe i ka dynamics hydration cement, he mea maikaʻi ia e hoʻonui i ka manawa hana o ka mea hui hou a hoʻomaikaʻi i ka nalowale o ka manawa o ka paʻa ʻana o ka mortar a me ka slump concrete, akā hiki nō hoʻi. hoʻopaneʻe ka holomua o ke kūkulu ʻana.
Ka manawa hoʻouna: Sep-24-2024