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Ka nānā 'ana i ke kumu kū'ē o ka wai o ka putty latex pauda redispersible

ʻO ka pauka latex redispersible a me ka sima ka mea paʻa nui a me nā mea hana kiʻiʻoniʻoni o ka putty pale wai. ʻO ka loina pale wai:

I ka wā o ka hui ʻana o ka pauka latex redispersible a me ka sima, ua hoʻihoʻi mau ʻia ka pauka latex i ke ʻano emulsion kumu, a ua hoʻopuehu ʻia nā ʻāpana latex i loko o ka slurry sima. Ma hope o ka hui ʻana o ka sima i ka wai, hoʻomaka ka hopena hydration, hoʻopiha ʻia ka hopena Ca (OH) 2 a hoʻoheheʻe ʻia nā kristal, a hoʻokumu ʻia nā kristal ettringite a me nā colloids calcium silicate hydrated i ka manawa like, a waiho ʻia nā ʻāpana latex ma ka gel a ʻaʻole wai wai. ma nā ʻāpana sima.

Me ka holomua o ka hopena hydration, hoʻomau ka hoʻonui ʻana i nā huahana hydration, a ʻohi mālie nā ʻāpana latex i loko o nā hakahaka o nā mea inorganic e like me ka sima, a hana i kahi papa paʻa paʻa ma ka ʻili o ka gel sima. Ma muli o ka emi iki ʻana o ka wai maloʻo, ua hoʻopili paʻa ʻia nā ʻāpana latex i hoʻopaʻa ʻia i loko o ka gel a me nā voids aggregate e hana i kahi kiʻiʻoniʻoni hoʻomau, e hana ana i kahi hui ʻana me ka paʻi cement interpenetrating matrix, a hana i ka paʻi sima a me nā iwi pauka i hoʻopili ʻia kekahi i kekahi. . Ma muli o ka hoʻopili ʻana o nā ʻāpana latex a hana i kahi kiʻiʻoniʻoni i loko o ka wahi hoʻololi interfacial o ka sima a me nā pauka ʻē aʻe, ʻoi aku ka paʻakikī o ka wahi hoʻololi o ka ʻōnaehana putty, no laila e hoʻomaikaʻi ai i kona kūpaʻa wai.

I ka manawa like, ʻo nā pūʻulu ikaika i hana ʻia e ka pauka latex redispersible ma hope o ka hoʻihoʻi hou ʻana, e like me ka monomer methacrylic acid i hoʻokomo ʻia i ka wā o ka synthesis o ka emulsion, loaʻa nā hui carboxyl, hiki ke hoʻopaʻa ʻia me Ca2+, Al3+, etc. mea hoʻomaʻemaʻe calcium kaumaha. , e hana i kahi pilina alahaka kūikawā, e hoʻomaikaʻi i ke ʻano kino o ke kino paʻakikī sima, a hoʻonui i ka compactness o ka interface putty. Hoʻokumu ʻia nā ʻāpana latex i hoʻokuʻu ʻia i kahi kiʻiʻoniʻoni hoʻomau a paʻa i loko o nā hakahaka o ka ʻōnaehana putty.


Ka manawa hoʻouna: Nov-01-2022
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