He aha nā hopena like ʻole o nā cellulose like ʻole ma ka plaster o Paris
Hiki ke hoʻohana ʻia ʻo carboxymethyl cellulose a me methyl cellulose ma ke ʻano he mau mea mālama wai no ka plaster, akā ʻoi aku ka haʻahaʻa o ka hopena mālama wai o ka carboxymethyl cellulose ma mua o ka methyl cellulose, a loaʻa i ka carboxymethyl cellulose ka paʻakai sodium, no laila ʻaʻole kūpono no ka plaster o Paris. Loaʻa ka hopena hoʻomaha a hoʻemi i ka ikaika o ka plaster o Paris. ʻO ka Methyl cellulose kahi hui kūpono no nā mea cementitious gypsum e hoʻohui ana i ka mālama wai, ka mānoanoa, ka hoʻoikaika ʻana, a me ka viscosifying, koe wale nō kekahi mau ʻano he hopena hoʻomaha ke nui ka dosage. ʻoi aku ka kiʻekiʻe ma mua o ka carboxymethyl cellulose. No kēia kumu, ʻo ka hapa nui o nā mea gelling composite gypsum e hoʻohana i ke ʻano o ka hui ʻanaka carboxymethyl cellulosea memethyl cellulose, ʻaʻole wale nō e hoʻokō i ko lākou mau ʻano ponoʻī (e like me ka hopena hoʻopaneʻe o ka carboxymethyl cellulose, ka hopena hoʻoikaika o ka methyl cellulose), a hoʻokō i ko lākou mau pono maʻamau (e like me ko lākou paʻa wai a me ka hopena mānoanoa). Ma kēia ʻano, hiki ke hoʻomaikaʻi ʻia ka hana paʻa wai o ka mea sima gypsum a me ka hana piha o ka mea sima gypsum, ʻoiai e mālama ʻia ka hoʻonui kumukūʻai ma kahi haʻahaʻa loa.
Pehea ke koʻikoʻi o ka viscosity o ka methyl cellulose ether no ka gypsum mortar?
ʻO ka viscosity kahi mea nui o ka hana o ka methyl 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 methyl 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 he kūlike pololei. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka viscous o ka mortar pulu. I ka wā o ke kūkulu ʻana, ua hōʻike ʻia ʻo ia he pipili i ka scraper a me ke kiʻekiʻe o ka hoʻopili ʻana i ka substrate. Akā, ʻaʻole ia he mea kōkua ke hoʻonui 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. Ma ke ʻano ʻē, 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.
Pehea ke koʻikoʻi o ka maikaʻi o ka cellulose ether i ka mortar?
ʻO ka maikaʻi kekahi ʻōkuhi hana koʻikoʻi o ka methyl cellulose ether. Pono ka MC i hoʻohana ʻia no ka mortar pauka maloʻo e lilo i pauka me ka haʻahaʻa o ka wai, a ʻo ka maikaʻi hoʻi e pono ai he 20% a 60% o ka nui o ka ʻāpana e emi iho ma mua o 63m. Hoʻopilikia ka maikaʻi i ka solubility o ka methyl cellulose ether. ʻO ka MC Coarse he granular maʻamau, kahi maʻalahi e hoʻopuehu a hoʻoheheʻe ʻia i ka wai me ka ʻole o ka agglomeration, akā lohi loa ka wikiwiki o ka hoʻoheheʻe ʻana, no laila ʻaʻole kūpono no ka hoʻohana ʻana i ka mortar pauka maloʻo. He flocculent kekahi mau huahana kūloko, ʻaʻole maʻalahi e hoʻopuehu a hoʻoheheʻe ʻia i ka wai, a maʻalahi hoʻi e agglomerate. I loko o ka mortar pauka maloʻo, hoʻopuehu ʻia ʻo MC ma waena o nā mea sima e like me ka aggregate, ka mea hoʻopiha maikaʻi a me ka sima, a ʻo ka pauka maikaʻi wale nō e hiki ke pale aku i ka agglomeration methyl cellulose ether i ka wā e hui pū ai me ka wai. Ke hoʻohui ʻia ʻo MC me ka wai e hoʻoheheʻe i nā agglomerates, he paʻakikī loa ka hoʻopuehu a hoʻoheheʻe ʻia. CoarseMCʻaʻole wale ia he mea hoʻonele wale nō, akā hoʻemi pū kekahi i ka ikaika kūloko o ka mortar. Ke hoʻopili ʻia kēlā mortar pauka maloʻo ma kahi ākea, e emi nui ka wikiwiki o ka hoʻōla ʻana o ka mortar kūloko, a e ʻike ʻia nā māwae ma muli o nā manawa hoʻōla like ʻole. No ka mortar i pīpī ʻia me ke kūkulu mechanical, ʻoi aku ke kiʻekiʻe o ke koi no ka fineness ma muli o ka manawa hui pōkole.
Loaʻa i ka maikaʻi o MC kahi hopena i kona paʻa ʻana i ka wai. Ma ke ʻano laulā, no nā methyl cellulose ethers me ka viscosity like akā ʻokoʻa ka maikaʻi, ma lalo o ka nui o ka hoʻohui like, ʻoi aku ka maikaʻi o ka maikaʻi o ka hopena paʻa wai.
Ka manawa hoʻouna: ʻApelila-25-2024