ʻO ka hoʻomohala ʻana a me ka hoʻohana ʻana opolycarboxylic superplasticizerʻano wikiwiki.ʻOi aku i nā papahana nui a nui e like me ka mālama wai, hydropower, hydraulic engineering, marine engineering, a me nā alahaka, hoʻohana nui ʻia ka polycarboxylate superplastisizer.
Ma hope o ka hui ʻana o ka sima me ka wai, hoʻokumu ʻia ka slurry sima i kahi flocculation ma muli o ka gravity molecular o nā ʻāpana sima, no laila ʻo 10% a 30% o ka wai hui ʻia i uhi ʻia i loko o nā ʻāpana sima a ʻaʻole hiki ke komo i ke kahe manuahi a me ka lubrication. , pela e pili ana i ka Flowability o ka hui pipili.Ke hoʻohui ʻia ka supreplasticizer, hiki ke hoʻopili ʻia nā molekele hoʻohaʻahaʻa wai ma luna o ka ʻili o nā ʻāpana sima, i loaʻa i nā ʻili o nā ʻāpana sima ka uku like (ʻoi aku ka maikaʻi ʻole), e hana ana i ka electrostatic repulsion, e hāpai ana i ka hui like. ka hoʻopuehu ʻana o nā ʻāpana sima a me ka luku ʻana i ka hale flocculation., e hoʻokuʻu ana i kahi ʻāpana o ka wai i kāwili ʻia e komo i ke kahe, a laila e hoʻonui maikaʻi i ka wai o ka hui ʻana.
ʻO ka hui hydrophilic i loko o kamea hoemi waihe polar loa, no laila, hiki i ka wai ho'ēmi wai adsorption kiʻi ma luna o ka ili o nā ʻāpana sima ke hana i kahi kiʻi wai paʻa paʻa me nā mole wai.He hopena lubrication maikaʻi kēia kiʻi wai a hiki ke hoʻohaʻahaʻa pono i ka pale ʻana ma waena o nā ʻāpana sima, a laila e hoʻomaikaʻi hou ai i ka wai o ka mortar a me ke koneki.
ʻO ke kaulahao lālā hydrophilic i loko o kasuperplasticizerʻO ke kūkulu ʻana i loko o ka wai hoʻonā, a laila e hana ana i kahi hydrophilic ʻekolu-dimensional adsorption layer me kahi mānoanoa ma luna o ka ʻili o nā ʻāpana sima adsorbed.Ke kokoke nā ʻāpana sima i kekahi i kekahi, hoʻomaka nā ʻāpana adsorption e uhi, ʻo ia hoʻi, ke kū nei ka steric hindrance ma waena o nā ʻāpana sima.ʻO ka ʻoi aku o ka overlap, ʻoi aku ka nui o ka steric repulsion, a ʻoi aku ka nui o ka keakea ʻana i ka hui ʻana ma waena o nā ʻāpana sima, e hoʻomau maikaʻi ana ka mortar a me ka Slump.
I ka manawa o ka hoomakaukau ana o kapolycarboxylate mea hoemi wai, Hoʻopili ʻia kekahi mau kaulahao lālā ma nā mole o ka mea hoʻemi wai.ʻO kēia kaulahao lālā ʻaʻole hāʻawi wale i ka hopena steric hindrance, akā pū kekahi, i ke ʻano alkalinity kiʻekiʻe o ka hydration cement, hiki ke ʻoki ʻia ke kaulahao lālā, a laila e hoʻokuʻu ana i ka polycarboxylic acid me ka hopena dispersing, hiki ke hoʻomaikaʻi i ka hopena dispersion o nā ʻāpana sima a hoʻomalu i ka hāʻule haʻahaʻa.
Ka manawa hoʻouna: Mar-29-2024