5. Nā pilikia me ka hoʻohana ʻana i ka mea hoʻemi wai-wai polycarboxylate

He haʻahaʻa ke ʻano o ka mea hoʻohaʻahaʻa wai polycarboxylate, kiʻekiʻe ke kiʻekiʻe o ka hoʻohaʻahaʻa wai, a mālama maikaʻi ʻia ka haʻahaʻa, akā hiki mai nā pilikia i ka noi:

① He mea koʻikoʻi ke ʻano i ka wā liʻiliʻi ka ratio wai-a-cement, a hōʻike i ka nui o ka emi ʻana o ka wai. Eia nō naʻe, i ka nui o ka ratio wai-a-cement (ma luna o 0.4), ʻaʻole maopopo loa ka nui o ka hoʻemi ʻana o ka wai a me kāna mau loli, pili paha i ka polycarboxylic acid. ʻO ke ʻano o ka hana o ka wai hoʻohaʻahaʻa wai i hoʻokumu ʻia e pili ana i kona dispersion a me ka hopena paʻa ma muli o ka hopena steric hindrance i hoʻokumu ʻia e ka molecular structure. Ke nui ka lākiō hoʻopaʻa wai, lawa ka spacing ma waena o nā mole wai i loko o ka ʻōnaehana hoʻoheheʻe sima, no laila ʻoi aku ka liʻiliʻi o ka manawa ma waena o nā molekole polycarboxylic acid.

② Ke nui ka nui o nā mea sima, ʻoi aku ka ʻike o ka mana o ka dosage. Ma lalo o nā kūlana like, ʻoi aku ka liʻiliʻi o ka hopena o ka hoʻohaʻahaʻa wai inā ʻoi aku ka liʻiliʻi o ka nui o nā mea cementitious <300kg/m3 ma mua o ka emi ʻana o ka wai i ka wā o ka nui o nā mea cementitious he> 400kg/m3. Eia kekahi, i ka nui o ka lakio wai-cement a liʻiliʻi ka nui o nā mea cementitious, e loaʻa kahi hopena superimposed.

Hoʻokumu ʻia ka polycarboxylate superplasticizer no ka ʻoihana kiʻekiʻe, no laila ʻoi aku ka maikaʻi o kāna hana a me ke kumukūʻai no ka hana kiʻekiʻe.

6. E pili ana i ka hoʻohui ʻana i nā mea hoʻemi wai wai polycarboxylic acid

ʻAʻole hiki ke hoʻohui ʻia nā mea hoʻohaʻahaʻa wai polycarboxylate me nā mea hoʻohaʻahaʻa wai-naphthalene. Inā hoʻohana ʻia nā mea hoʻohaʻahaʻa wai ʻelua i nā lako like, e loaʻa pū kekahi hopena inā ʻaʻole hoʻomaʻemaʻe maikaʻi ʻia. No laila, koi pinepine ʻia e hoʻohana i kahi hoʻonohonoho ʻokoʻa o nā mea hana no ka polycarboxylic acid-based water reducing agents.

E like me ke kūlana hoʻohana o kēia manawa, maikaʻi ka hui pū ʻana o ka ea-entraining agent a me polycarboxylate. ʻO ke kumu nui, he haʻahaʻa ka nui o ka mea hoʻoheheʻe ea, a hiki ke "kūpono" me ka polycarboxylic acid-based wai-reducing agent e hiki ke kūpono. , kokua. ʻO ka sodium gluconate i loko o ka retarder he kūpono maikaʻi nō hoʻi, akā maikaʻi ʻole ka launa pū me nā mea hoʻohui paʻakai inorganic a paʻakikī ke hoʻohui.

7. E pili ana i ka waiwai PH o ka polycarboxylic acid wai ho'ēmi wai

ʻOi aku ka haʻahaʻa o ka pH o ka polycarboxylic acid-based water-reducing agents ma mua o ka nui o nā mea hoʻohaʻahaʻa wai kiʻekiʻe, ʻo 6-7 wale nō kekahi. No laila, pono lākou e mālama i loko o ka fiberglass, plastic a me nā ipu ʻē aʻe, ʻaʻole hiki ke mālama ʻia i loko o nā pahu metala no ka manawa lōʻihi. E hoʻohaʻahaʻa ʻia ka polycarboxylate wai hoʻemi ʻana i ka wai, a ma hope o ka hoʻoheheʻe ʻana i ka waika lōʻihi, e hoʻopilikia i ke ola o ka pahu metala a me ka palekana o ka mālama ʻana a me ka ʻōnaehana halihali.