Ka lā i kau ai:30,Nov,2022

A. Mea hoemi wai

ʻO kekahi o ka hoʻohana nui ʻana o ka mea hoʻemi wai e hōʻemi i ka hoʻohana ʻana i ka wai o ka ʻiʻo a hoʻomaikaʻi i ka wai o ke kaila ma lalo o ke ʻano o ka mālama ʻana i ka ratio binder wai i hoʻololi ʻole ʻia, i mea e hoʻokō ai i nā koi o ka lawe ʻana a me ke kūkulu ʻana. ʻO ka hapa nui o nā mea hoʻohui wai hoʻohaʻahaʻa i loaʻa kahi ʻano saturated. Inā ʻoi aku ka nui o ka nui o ka saturated, ʻaʻole e piʻi ka nui o ka hoʻohaʻahaʻa wai, a hiki mai ke koko a me ka hoʻokaʻawale ʻana. Ua pili ka saturated dosage i nā mea ʻokoʻa ʻelua a me ka ʻāpana hui ʻana.

 

1. Naphthalene superplasticizer

Naphthalene superplasticizerhiki ke hoʻokaʻawale ʻia i nā huahana kiʻekiʻe (Na2SO4 maʻiʻo<3%), nā huahana kūwaho (Na2SO4 maʻiʻo 3% ~ 10%) a me nā huahana haʻahaʻa (Na2SO4 maʻiʻo> 10%) e like me ka ʻike o Na2SO4. ʻO ka nui o ka nui o ka naphthalene series water reducer: ʻo ka pauka he 0.5 ~ 1.0% o ka nui sima; ʻO ka maʻiʻo paʻa o ka hopena he 38% ~ 40%,ʻo ka nui o ka huiʻana he 1.5% ~ 2.5% o ka maikaʻi sima, aʻo ka nui o ka ho'ēmi wai he 18% ~ 25%. Naphthalene series water reducer ʻaʻole e kahe i ka ea, a he liʻiliʻi ka hopena i ka manawa hoʻonohonoho. Hiki ke hoʻohui ʻia me ka sodium gluconate, sugars, hydroxycarboxylic acid a me nā paʻakai, citric acid a me inorganic retarder, a me ka nui kūpono o ka ea entraining agent, hiki ke hoʻomalu maikaʻi ʻia ka slump loss. ʻO ka hemahema o ka haʻahaʻa haʻahaʻa naphthalene series water reducer ʻo ia ka nui o ka ʻike o ka sodium sulfate. Ke emi ka mahana ma lalo o 15 ℃, hiki mai ka crystallization sodium sulfate.

 

2. Polycarboxylic acid superplasticizer

Polycarboxylic acidUa manaʻo ʻia ka mea hoʻemi wai ma ke ʻano he hanauna hou o ka hoʻohaʻahaʻa wai kiʻekiʻe, a ke manaʻo mau nei ka poʻe e ʻoi aku ka palekana, ʻoi aku ka maikaʻi a ʻoi aku ka hoʻololi ʻana ma mua o ka mea hoʻohaʻahaʻa wai moʻo naphthalene ma ka noi. Hōʻike ʻia nā pono hana o ka polycarboxylic acid type water reducing agent i: haʻahaʻa haʻahaʻa (0.15% ~ 0.25% (nā mea i hoʻololi ʻia), kiʻekiʻe ka hoʻohaʻahaʻa wai wai (maʻamau 25% ~ 35%), paʻa maikaʻi slump, shrinkage haʻahaʻa, kekahi ea entrainment, a haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa alkali.

Eia naʻe, ma ka hana,polycarboxylic acidʻO ka mea hoʻohaʻahaʻa wai e hālāwai pū me kekahi mau pilikia, e like me: 1. ʻO ka hopena hoʻohaʻahaʻa wai e pili ana i nā mea maka a me ka hui ʻana o ka pāpaʻi, a ua hoʻopilikia nui ʻia e ka ʻili o ke one a me ka pōhaku a me ka maikaʻi o nā mea hoʻohui mineral; 2. ʻO ka hopena o ka hoʻohaʻahaʻa wai a me ka hoʻopaʻa ʻana i ka wai e hilinaʻi nui ʻia i ke ʻano o ka mea hoʻohaʻahaʻa wai, a paʻakikī ke mālama ʻana i ka haʻahaʻa me ka haʻahaʻa haʻahaʻa; 3. ʻO ka hoʻohana ʻana i ke kiʻekiʻe kiʻekiʻe a i ʻole ka ikaika kiʻekiʻe ka nui o ka hoʻohui ʻana, ka mea maʻalahi i ka hoʻohana ʻana i ka wai, a ʻo ka liʻiliʻi liʻiliʻi o ka hoʻohana ʻana i ka wai hiki ke hoʻololi nui i ka hina; 4. Aia ka pilikia kūpono me nā ʻano mea hoʻemi wai a me nā mea hoʻohui ʻē aʻe, a i ʻole ka hopena superposition; 5. I kekahi manawa, nui ka wai kahe o ke koko, komo nui ka ea, a me na ohu a nui; 6. I kekahi manawa e hoʻololi ka wela i ka hopena opolycarboxylic acidmea hoemi wai.

Nā mea e pili ana i ka hoʻopili ʻana o ka sima a mepolycarboxylic acidka mea hoʻemi wai: 1. Hoʻonui ka lakio o C3A / C4AF a me C3S / C2S, hoʻemi ka hoʻohālikelike, hoʻonui C3A, a piʻi ka hoʻohana ʻana i ka wai. Ke ʻoi aku ka nui o kāna ʻike ma mua o 8%, piʻi ka hāʻule ʻana o ka slump o ke koki; 2. ʻO ka nui a i ʻole ka liʻiliʻi liʻiliʻi o ka alkali e hoʻopilikia i ko lākou kūlike; 3. ʻO ka maikaʻi maikaʻi ʻole o ka hoʻohui ʻana i ka sima e pili pū i ka hoʻohālikelike ʻana o nā mea ʻelua; 4. Nāʻano gypsum likeʻole; 5. Hiki i ke kiʻekiʻe wela ke hoʻonohonoho wikiwiki i ka wā i ʻoi aku ka mahana ma mua o 80 ℃; 6. Loaʻa i ka sima hou ka waiwai uila ikaika a me ka ikaika ikaika e komo i ka mea hoʻemi wai; 7. Ka ili kiko o ka sima.