ʻO ka cellulose ether ma ka mortar one

Ke hoʻohana nei iā P·II 52.5 papa sima e like me ka cementitious mea a me ke kila slag one e like me ka maikaʻi aggregate, ke kila slag one me ka kiʻekiʻe fluidity a me ka ikaika kiʻekiʻe ua hoomakaukauia ma ka hoʻohui chemical additives e like me ka wai reducer, latex pauka a defoamer Special mortar, a me ka hopena o elua okoa. viscosities (2000mPa·s a me 6000mPa·s) o ka hydroxypropyl methylcellulose ether (HPMC) ma kona paʻa wai, ka wai a me ka ikaika i aʻo ʻia. Hōʻike nā hopena: (1) Hiki i ka HPMC2000 a me ka HPMC6000 ke hoʻonui nui i ka nui o ka mālama ʻana i ka wai o ka palaki hou i hui ʻia a hoʻomaikaʻi i kāna hana mālama wai; (2) Ke haʻahaʻa ka ʻike o ka cellulose ether, ʻaʻole maopopo ka hopena i ka wai o ka mortar. Ke hoʻonui ʻia i ka 0.25% a i luna paha, loaʻa iā ia kekahi hopena deterioration i ka wai o ka mortar, a ma waena o ia ka hopena deterioration o HPMC6000 i ʻike ʻia; (3) ka hoʻohui o ka cellulose etera ʻaʻohe hopena maopopo i ka ikaika compressive 28-lā o ka mortar, akā ʻo ka hoʻohui ʻana o HPMC2000 manawa kūpono ʻole, ʻaʻole maikaʻi ia i ka ikaika flexural o nā makahiki like ʻole, a ma ka manawa like e hoʻemi nui ai. ka mua (3 lā a me 7 lā) ikaika compressive o ka mortar; (4) He hopena ko ka hoʻohui ʻana o HPMC6000 i ka ikaika flexural o nā makahiki like ʻole, akā ʻoi aku ka haʻahaʻa o ka hōʻemi ma mua o ka HPMC2000. Ma kēia pepa, ua manaʻo ʻia he pono ke koho ʻia ʻo HPMC6000 i ka wā e hoʻomākaukau ai i ke kila slag one mortar kūikawā me ka fluidity kiʻekiʻe, ka nui o ka mālama ʻana i ka wai a me ka ikaika kiʻekiʻe, a ʻaʻole pono e ʻoi aku ka nui ma mua o 0.20%.

Hua'ōlelo nui:kila slag one; cellulose ether; viscosity; hana hana; ikaika

hoʻolauna

ʻO ka slag kila kahi huahana o ka hana ʻana i ke kila. Me ka hoʻomohala ʻana o ka ʻoihana hao a me ke kila, ua hoʻonui ʻia ka hoʻokuʻu ʻana o ka slag kila ma kahi o 100 miliona mau makahiki i hala iho nei, a ʻo ka pilikia o ka hoʻopaʻa ʻana ma muli o ka hiki ʻole o ka hoʻohana ʻana i ka manawa kūpono. No laila, ʻo ka hoʻohana ʻana i nā kumuwaiwai a me ka hoʻokuʻu ʻana i ke kila kila ma o nā ʻano ʻepekema a maikaʻi hoʻi he pilikia hiki ʻole ke mālama ʻia. Loaʻa i ke kila slag nā hiʻohiʻona o ke kiʻekiʻe kiʻekiʻe, ka ʻano paʻakikī a me ka ikaika compressive kiʻekiʻe, a hiki ke hoʻohana ʻia ma ke ʻano he pani no ke one maoli i loko o ka momi sima a i ʻole ka pā. Loaʻa i ke kila slag kekahi reactivity. Hoʻopili ʻia ka ʻōpala kila i loko o kahi pauka maikaʻi (steel slag powder). Ma hope o ka hoʻohui ʻia ʻana i loko o ka koneki, hiki iā ia ke hoʻokō i kahi hopena pozzolanic, e kōkua ana i ka hoʻonui ʻana i ka ikaika o ka slurry a hoʻomaikaʻi i ka hoʻololi ʻana ma waena o ka aggregate concrete a me ka slurry. wahi, ma laila e hoʻonui ai i ka ikaika o ke kaʻa. Eia naʻe, pono e noʻonoʻo i ka hoʻokuʻu ʻia ʻana o ke kila me ka ʻole o nā ana, ʻo kona kūloko calcium manuahi, manuahi magnesium oxide a me ka pae RO e hoʻopilikia i ka leo paʻa o ka slag kila, ka mea e kaupalena ʻia ai ka hoʻohana ʻana i ke kila kila e like me ka coarse a. nā hui maikaʻi. Hoʻohana ʻia i loko o ka mīkini sima a i ʻole ke kaʻa. ʻO Wang Yuji et al. ua hōʻuluʻulu ʻia nā kaʻina hana lapaʻau ʻokoʻa kila a ʻike ʻia ka paʻa maikaʻi o ka pala kila i mālama ʻia e ke ʻano hoʻomoʻa wela a hiki ke hoʻopau i kona pilikia hoʻonui i ka sima sima, a ua hoʻokō maoli ʻia ke kaʻina hana hoʻomaʻamaʻa wela ma Shanghai No. 3 Iron and Steel Plant no ka manawa mua. Ma waho aʻe o ka pilikia o ke kūpaʻa, loaʻa i nā mea hoʻohui kila kila nā hiʻohiʻona o nā pores rough, multi-angles, a me kahi liʻiliʻi o nā huahana hydration ma ka ʻili. Ke hoʻohana ʻia e like me nā aggregates no ka hoʻomākaukau ʻana i ka mortar a me ke koʻikoʻi, pili pinepine kā lākou hana hana. I kēia manawa, ma lalo o ke kumu o ka hōʻoia ʻana i ka paʻa o ka leo, ʻo ka hoʻohana ʻana i ke kila kila ma ke ʻano he hui maikaʻi no ka hoʻomākaukau ʻana i ka momi kūikawā he kuhikuhi koʻikoʻi no ka hoʻohana ʻana i nā kumuwaiwai o ke kila kila. Ua ʻike ʻia ka haʻawina ʻo ka hoʻohui ʻana i ka mea hoʻemi wai, ka pauka latex, cellulose ether, ka mea hoʻoheheʻe i ka ea a me ka defoamer i ka mīkini paʻi kila kila hiki ke hoʻomaikaʻi i ka hana hui ʻana a me ka hana paʻakikī o ka mortar one slag e like me ka mea e pono ai. Ua hoʻohana ka mea kākau i nā ana o ka hoʻohui ʻana i ka pauka latex a me nā mea hoʻohui ʻē aʻe no ka hoʻomākaukau ʻana i ke one palapa kila kiʻekiʻe. I ka hana ʻana a me ka hoʻohana ʻana i ka mortar, cellulose ether ka mea hoʻohui kemika maʻamau. ʻO nā etera cellulose maʻamau i hoʻohana ʻia i ka mortar he hydroxypropyl methyl cellulose ether (HPMC) a me ka hydroxyethyl methyl cellulose ether (HEMC). )E kali. Hiki i ka cellulose ether ke hoʻomaikaʻi i ka hana o ka mortar i kahi nui, e like me ka hāʻawi ʻana i ka mortar i ka mālama ʻana i ka wai maikaʻi ma o ka mānoanoa, akā ʻo ka hoʻohui ʻana i ka cellulose ether e hoʻopili pū i ka wai, ka ea, ka hoʻonohonoho ʻana i ka manawa a me ka paʻakikī o ka mortar. Nā waiwai like ʻole.

I mea e alakaʻi maikaʻi ai i ka hoʻomohala ʻana a me ka hoʻohana ʻana i ka momi one kila, ma ke kumu o ka hana noiʻi mua ma ke kila slag one mortar, ua hoʻohana kēia pepa i ʻelua ʻano viscosities (2000mPa·s a me 6000mPa·s) o ka hydroxypropyl methyl cellulose ether (HPMC) E hana i ka noiʻi hoʻokolohua e pili ana i ka hoʻoikaika ʻana o ke one slag kila kiʻekiʻe i ka mortar ma ka hana hana (ka wai a me ka paʻa ʻana o ka wai) a me ka ikaika compressive a flexural.

1. Māhele hoʻokolohua

1.1 Mea maka

Cement: Onoda P·II 52.5 papa sima.

ʻO ke one slag kila: ʻO ka mea hoʻololi kila kila i hana ʻia e Shanghai Baosteel e hana ʻia e ke kaʻina hana meaʻai wela, me ka nui o 1910kg/m.³, no ke one waena, a me ka modulus fineness o 2.3.

Mea hoʻemi wai: polycarboxylate water reducer (PC) i hana ʻia e Shanghai Gaotie Chemical Co., Ltd., ma ke ʻano pauka.

Latex pauka: Model 5010N i hāʻawi ʻia e Wacker Chemicals (China) Co., Ltd.

Defoamer: Code P803 huahana i hāʻawi ʻia e German Mingling Chemical Group, pauka, density 340kg/m³, unahi hina 34% (800°C), pH waiwai 7.2 (20°C DIN ISO 976, 1% IN DIST, wai).

Cellulose ether: hydroxypropyl methylcellulose ether i hāʻawi ʻia eKima Chemical Co., Ltd., ka mea me ka viscosity o 2000mPa·s ua koho ʻia ʻo HPMC2000, a ʻo ka mea me ka viscosity o 6000mPa·Ua koho ʻia ʻo HPMC6000.

Ka wai hui ʻana: wai pā.

1.2 Lakiō hoʻokolohua

ʻO ka lakio sima-sand o ke kila slag-sand mortar i hoʻomākaukau ʻia i ka wā mua o ka hoʻāʻo ʻana he 1: 3 (mass ratio), ʻo ka ratio wai-cement he 0.50 (mass ratio), a ʻo ke ʻano o ka polycarboxylate superplasticizer he 0.25% (Cement mass percentage, the same below. ), ʻO ka maʻiʻo o ka pauka latex he 2.0%, a ʻo ka ʻike defoamer he 0.08%. No nā hoʻokolohua hoʻohālikelike, ʻo ka nui o nā eter cellulose ʻelua HPMC2000 a me HPMC6000 he 0.15%, 0.20%, 0.25% a me 0.30%.

1.3 Ke ʻano hoʻāʻo

Motar Fluidity Test Method: e hoʻomākaukau i ka mortar e like me GB / T 17671-1999 "Cement Mortar Strength Test (ISO Method)", e hoʻohana i ka mold ho'āʻo ma GB / T2419-2005 "Cement Mortar Fluidity Test Method", a hoʻoulu i Pour the good mortar. i loko o ka pahu ho'āʻo wikiwiki, holoi aku i ka oi aku o ka moka me ka scraper, e hookiekie ae i ka pahu ho'āʻo kū pololei i luna, a i ka wā e kahe hou aku ai ka pahū, e ana i ke anawaena kiʻekiʻe o ka palahalaha o ka hamo a me ke anawaena ma ke ala kupapaʻu, a e lawe i ka waiwai awelika, pololei ka hopena i 5mm.

Hana ʻia ka hoʻāʻo ʻana o ka pae paʻa wai o ka mortar e like me ke ʻano i kuhikuhi ʻia ma JGJ/T 70-2009 "Nā Hana Hoʻāʻo no nā Pono Pono o ke kūkulu ʻana i ka mortar".

Hana ʻia ka hoʻāʻo o ka ikaika compressive a me ka ikaika flexural o ka mortar e like me ke ʻano i kuhikuhi ʻia ma GB/T 17671-1999, a ʻo nā makahiki hoʻāʻo he 3 lā, 7 lā a me 28 mau lā.

2. Nā hopena a me ke kūkākūkā

2.1 Ka hopena o ka cellulose ether i ka hana hana o ke kila slag one mortar

Mai ka hopena o ka maʻiʻo like ʻole o ka cellulose ether ma ka paʻa ʻana o ka wai o ke kila slag one mortar, hiki ke ʻike ʻia ʻo ka hoʻohui ʻana i ka HPMC2000 a i ʻole HPMC6000 hiki ke hoʻomaikaʻi maikaʻi i ka paʻa ʻana o ka wai o ka mortar hou. Me ka piʻi ʻana o ka ʻike o ka cellulose ether, ua piʻi nui ka nui o ka mālama ʻana i ka wai o ka mortar a laila paʻa mau. Ma waena o lākou, inā he 0.15% wale nō ka nui o ka cellulose ether, ua hoʻonui ʻia ka nui o ka mālama ʻana i ka wai o ka mortar ma kahi o 10% ke hoʻohālikelike ʻia me ka mea ʻole me ka hoʻohui ʻana, hiki i 96%; ke hoʻonui ʻia ka ʻike i ka 0.30%, ʻoi aku ka nui o ka mālama ʻana o ka wai i ka 98.5%. Hiki ke ʻike ʻia ʻo ka hoʻohui ʻana o ka cellulose ether hiki ke hoʻomaikaʻi maikaʻi i ka paʻa ʻana o ka wai o ka mortar.

Mai ka hopena o nā ʻano like ʻole o ka cellulose ether ma luna o ka wai o ke kila slag one mortar, hiki ke ʻike ʻia i ka wā o ke ʻano o ka cellulose ether he 0.15% a me 0.20%, ʻaʻohe hopena maopopo i ka wai o ka mortar; i ka piʻi ʻana o ka dosage i 0.25% a i ʻole, ʻoi aku ka nui o ka hopena i ka wai, akā hiki ke mālama ʻia ka wai ma 260mm a ma luna; i ka wā e like ai nā cellulose ethers ʻelua, ke hoʻohālikelike ʻia me HPMC2000, ʻoi aku ka maopopo o ka hopena maikaʻi ʻole o HPMC6000 ma ka mortar fluidity.

ʻO ka Hydroxypropyl methyl cellulose ether he polymer non-ionic me ka paʻa wai maikaʻi, a i loko o kahi ākea, ʻoi aku ka nui o ka viscosity, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai a ʻoi aku ka maopopo o ka hopena mānoanoa. ʻO ke kumu, ʻo ka hui hydroxyl ma kāna kaulahao mole a me ka atom oxygen ma ka paʻa etera hiki ke hana i nā paʻa hydrogen me nā mole wai, e hoʻolilo i ka wai manuahi i wai paʻa. No laila, ma ka like like, hiki i ka HPMC6000 ke hoʻonui i ka viscosity o ka mortar ma mua o HPMC2000, e hoʻemi i ka wai o ka mortar, a hoʻonui i ka nui o ka paʻa wai. Hōʻike ka Palapala 10 i ke ʻano o luna ma o ka hana ʻana i kahi hopena viscoelastic ma hope o ka hoʻoheheʻe ʻia ʻana o ka cellulose ether i ka wai, a me ka ʻike ʻana i nā waiwai kahe ma ka deformation. Hiki ke ho'omaopopo'ia he nui ka wai o ka mortar kila i ho'omākaukau'ia i loko o kēia pepa, hiki ke hiki i ka 295mm me ka hui'ole, a he nui kona deformation. Ke hoʻohui ʻia ka cellulose ether, e hoʻoheheʻe ʻia ka slurry, a he liʻiliʻi kona hiki ke hoʻihoʻi i ke ʻano, no laila ke alakaʻi nei i ka emi ʻana o ka mobility.

2.2 Ka hopena o ka cellulose ether i ka ikaika o ke kila slag one mortar

ʻO ka hoʻohui ʻana o ka cellulose ether ʻaʻole pili wale i ka hana hana o ke kila slag sand mortar, akā pili pū kekahi i kāna mau mea mechanical.

Mai ka hopena o nā ʻano like ʻole o ka cellulose ether i ka ikaika compressive o ke kila slag one mortar, hiki ke ʻike ʻia ma hope o ka hoʻohui ʻana i ka HPMC2000 a me HPMC6000, piʻi ka ikaika compressive o ka mortar i kēlā me kēia dosage me ka makahiki. ʻO ka hoʻohui ʻana i ka HPMC2000 ʻaʻohe hopena i ʻike ʻia i ka ikaika compressive 28-lā o ka mortar, a ʻaʻole nui ka loli o ka ikaika; ʻoiai ʻo HPMC2000 ka hopena ʻoi aku ka nui o ka ikaika mua (3-lā a me 7-lā), e hōʻike ana i kahi ʻano o ka emi ʻana, ʻoiai ke piʻi nei ka dosage i 0.25% a ma luna aʻe, ua piʻi iki ka ikaika compressive mua, akā haʻahaʻa naʻe ma mua o kēlā me ka ʻole. hoʻohui. Ke emi iho ka helu o HPMC6000 ma mua o 0.20%, ʻaʻole maopopo ka hopena o ka ikaika compressive 7-lā a me 28 lā, a emi mālie ka ikaika compressive 3-lā. Ke piʻi aʻe ka ʻike o HPMC6000 i ka 0.25% a ma luna, ua hoʻonui ʻia ka ikaika o nā lā 28 i kekahi ʻano, a laila emi iho; ua emi iho ka ikaika o na la he 7, a ua noho paa; ua emi iho ka ikaika o na la 3 ma ke ano paa. No laila, hiki ke noʻonoʻo ʻia ʻo ka cellulose ethers me nā viscosities ʻelua o HPMC2000 a me HPMC6000 ʻaʻohe hopena deterioration maopopo i ka 28-lā compressive ikaika o ka mortar, akā ʻo ka hoʻohui ʻana o HPMC2000 he hopena maikaʻi ʻole i ka ikaika mua o ka mortar.

Loaʻa i ka HPMC2000 nā degere like ʻole o ka hōʻino ʻana i ka ikaika flexural o ka pahū, ʻaʻohe mea i ka wā mua (3 lā a me 7 lā) a i ʻole ka pae hope (28 lā). ʻO ka hoʻohui ʻana o HPMC6000 kekahi ʻano o ka hopena maikaʻi ʻole i ka ikaika flexural o ka mortar, akā ʻoi aku ka liʻiliʻi o ka hopena ma mua o ka HPMC2000.

Ma waho aʻe o ka hana o ka paʻa ʻana o ka wai a me ka mānoanoa, hoʻopaneʻe ka cellulose ether i ke kaʻina hydration o ka sima. ʻO ka mea nui ma muli o ka adsorption o nā molekele cellulose ether ma nā huahana hydration cement, e like me ka calcium silicate hydrate gel a me Ca(OH)2, e hana i kahi papa uhi; Eia kekahi, piʻi ka viscosity o ka solution pore, a keakea nei ka cellulose ether ʻO ka neʻe ʻana o Ca2 + a me SO42- i loko o ka hopena pore e hoʻopaneʻe i ka hana hydration. No laila, ua hoʻemi ʻia ka ikaika mua (3 lā a me 7 mau lā) o ka mortar i hui pū ʻia me HPMC.

ʻO ka hoʻohui ʻana i ka cellulose ether i ka mortar e hana i kahi helu nui o nā ʻōpū nui me ke anawaena o 0.5-3mm ma muli o ka hopena o ka ea o ka cellulose ether, a ua hoʻopili ʻia ke ʻano o ka cellulose ether membrane ma luna o ka ʻili o kēia mau ʻōpala, kahi i kahi ʻO kekahi nui ke kuleana i ka hoʻopaʻa ʻana i nā ʻōhū. kuleana, a laila e hoʻonāwaliwali i ka hopena o ka defoamer i loko o ka mortar. ʻOiai ʻo nā ʻōhū ea i hana ʻia e like me nā bearings pōpō i loko o ka mīkini hou i hui pū ʻia, kahi e hoʻomaikaʻi ai i ka hana, ke hoʻopaʻa ʻia a paʻakikī ka mortar, noho ka hapa nui o nā ea i loko o ka mortar e hana i nā pores kūʻokoʻa, e hōʻemi ana i ka ʻike o ka mortar. . Ke emi nei ka ikaika compressive a me ka ikaika flexural e like me ia.

Hiki ke ʻike ʻia i ka wā e hoʻomākaukau ai i ke kila slag one mortar kūikawā me ka wai kiʻekiʻe, ka nui o ka mālama ʻana i ka wai a me ka ikaika kiʻekiʻe, pono e hoʻohana i ka HPMC6000, a ʻaʻole pono ka nui o ka dosage ma mua o 0.20%.

i ka hopena

Ua aʻo ʻia nā hopena o ʻelua viscosities o cellulose ethers (HPMC200 a me HPMC6000) i ka paʻa ʻana o ka wai, fluidity, compressive a flexural ikaika o ke kila slag one mortar ma o nā hoʻokolohua, a ua ʻike ʻia ke ʻano o ka hana o ka cellulose ether i ke kila slag one mortar. ʻO nā hopena hope:

(1) No ka hoʻohui ʻana i ka HPMC2000 a i ʻole HPMC6000, hiki ke hoʻomaikaʻi maikaʻi ʻia ka nui o ka mālama ʻana i ka wai o ke kila kila hou i hui pū ʻia, a hiki ke hoʻomaikaʻi ʻia ka hana mālama wai.

(2) Ke emi ka dosage ma mua o 0.20%, ʻaʻole maopopo ka hopena o ka hoʻohui ʻana i ka HPMC2000 a me HPMC6000 i ka wai o ka mortar sand slag. Ke piʻi ka maʻiʻo i 0.25% a ma luna, HPMC2000 a me HPMC6000 i kekahi hopena maikaʻi ʻole i ka fluidity o ke kila slag one mortar, a ʻoi aku ka maopopo o ka hopena maikaʻi ʻole o HPMC6000.

(3) ʻAʻohe hopena o ka hoʻohui ʻana o HPMC2000 a me HPMC6000 i ka ikaika compressive 28-lā o ke kila slag one mortar, akā ʻoi aku ka maikaʻi ʻole o ka HPMC2000 i ka ikaika compressive mua o ka mortar, a ʻo ka ikaika flexural nō hoʻi ʻaʻole maikaʻi. ʻO ka hoʻohui ʻana o HPMC6000 he hopena maikaʻi ʻole i ka ikaika flexural o ke kila slag-sand mortar i nā makahiki āpau, akā ʻoi aku ka haʻahaʻa o ka hopena ma mua o ka HPMC2000.