ʻO ka Cellulose Etera a me ka Starch Etera ma nā ʻano o ka moka maloʻo

Ua hoʻohui ʻia nā ʻokoʻa like ʻole o ka cellulose etera a me ka starch etera i loko o ka pahū maloʻo i hui pū ʻia, a ua aʻo ʻia ma ka hoʻokolohua ʻana ke kūlike, ʻike ʻia ka mānoanoa, ka ikaika compressive a me ka ikaika paʻa o ka mortar. Hōʻike nā hopena i hiki i ka cellulose ether a me ka starch ether ke hoʻomaikaʻi maikaʻi i ka hana pili o ka mortar, a i ka wā e hoʻohana ʻia ai i ke ʻano kūpono, e ʻoi aku ka maikaʻi o ka hana holoʻokoʻa.

Hua'ōlelo nui: cellulose ether; starch etera; maloʻo hui ʻia

Loaʻa nā pōʻino ʻole o ka mortar kuʻuna o ka maʻalahi o ke koko, ka pohā, a me ka ikaika haʻahaʻa. ʻAʻole maʻalahi ka hoʻokō ʻana i nā koi o nā hale kiʻekiʻe, a maʻalahi hoʻi e hana i ka walaʻau a me ka pollution kaiapuni i ka wā o ke kaʻina hana. Me ka hoʻomaikaʻi ʻana i nā koi o ka poʻe no ke kūkulu ʻana i ka maikaʻi a me ke kaiaola, ua hoʻohana nui ʻia ka mortar maloʻo me ka hana ʻoi aku ka maikaʻi. ʻO ka mortar maloʻo, ka mea i ʻike ʻia ʻo ka mortar maloʻo, he huahana semi-hoʻopau i hui like ʻia me nā mea sima, nā mea hoʻohui maikaʻi, a me nā mea hoʻohui i kekahi ʻāpana. Lawe ʻia i ke kahua kūkulu i loko o nā ʻeke a i ʻole ka nui no ka hui ʻana me ka wai.

ʻO ka cellulose ether a me ka starch ether nā mea hoʻohui maʻamau maʻamau ʻelua. ʻO ka cellulose ether ka ʻāpana kumu o ka anhydroglucose i loaʻa mai ka cellulose kūlohelohe ma o ka hopena etherification. He mea polymer hiki ke hoʻoheheʻe ʻia i ka wai a hana maʻamau ma ke ʻano he lubricant i ka mortar. Eia kekahi, hiki iā ia ke hōʻemi i ka waiwai paʻa o ka mortar, hoʻomaikaʻi i ka hana o ka mortar, hoʻonui i ka nui o ka paʻa ʻana o ka wai o ka mortar, a hoʻemi i ka hikiwawe nahā o ka uhi ʻana. ʻO ka starch ether kahi eter pani pani i hoʻokumu ʻia e ka hopena o nā pūʻulu hydroxyl i loko o nā molekala starch me nā mea hana. Loaʻa iā ia ka hiki ke mānoanoa wikiwiki, a hiki i ka dosage haʻahaʻa ke loaʻa nā hopena maikaʻi. Hoʻohui pinepine ʻia me ka cellulose i loko o ka mīkini hana hoʻohana me ka ether.

1. Hoao

1.1 Mea maka

Cement: Ishii P·O42.5R sima, maʻamau maʻamau ka hoʻohana wai 26.6%.

Ke one: one waena, modulus fineness 2.7.

Cellulose ether: hydroxypropyl methylcellulose ether (HPMC), viscosity 90000MPa·s (2% hoʻonā wai, 20°C), hāʻawi ʻia e Shandong Yiteng New Material Co., Ltd.

Starch ether: hydroxypropyl starch ether (HPS), hāʻawi ʻia e Guangzhou Moke Building Materials Technology Co., Ltd.

Wai: wai paipu.

1.2 Hana ho'āʻo

E like me nā ʻano i kuhikuhi ʻia ma "Standards for Basic Performance Test Methods of Building Mortar" JGJ/T70 a me "Technical Regulations for Plastering Mortar" JGJ/T220, ua hoʻomākaukau ʻia nā laʻana a me ka ʻike ʻana i nā ʻāpana hana.

Ma kēia hoʻāʻo ʻana, ua hoʻoholo ʻia ka hoʻohana ʻana i ka wai o ka mortar benchmark DP-M15 me ke kūlike o 98mm, a ʻo ka ratio mortar he sima: one: wai = 1:4:0.8. ʻO ka nui o ka cellulose ether i loko o ka mortar he 0-0.6%, a ʻo ke ʻano o ka starch ether he 0-0.07%. Ma ka hoʻololi ʻana i ke ʻano o ka cellulose ether a me ka starch ether, ua ʻike ʻia he hopena ka hoʻololi ʻana o ke ʻano o ka admixture i ka mortar. hopena i ka hana pili. ʻO ka maʻiʻo o ka cellulose ether a me ka starch ether e helu ʻia ma ke ʻano he pākēneka o ka nui sima.

2. Nā hopena hoʻāʻo a me ka nānā ʻana

2.1 Nā hopena hoʻāʻo a me ka nānā ʻana o ka hoʻohui hoʻokahi-doped

E like me ka lakio o ka papahana hoʻokolohua i ʻōlelo ʻia ma luna, ua hoʻokō ʻia ka hoʻokolohua, a ua loaʻa ka hopena o ka hoʻohui ʻana hoʻokahi i ka kūlike, ʻike ʻia, ka ikaika compressive a me ka ikaika hoʻopaʻa o ka mortar maloʻo.

I ka ho'āʻoʻana i nā hopena ho'āʻo o ka hui hui hoʻokahi, hiki keʻikeʻia i ka hui pūʻiaʻana o ka starch ether, e emi mau ana ka paʻa o ka mortar i ka hoʻohālikelikeʻia me ka mortar benchmark me ka piʻiʻana o ka nui o ka starch ether, a me ka mānoanoa o ka mākia. e hoʻonui ʻia ka pāpaʻi me ka hoʻonui ʻana o ka nui. ʻO ka emi ʻana, akā ʻoi aku ka nui ma mua o ka mortar benchmark i ʻike ʻia, e hoʻomau ka emi ʻana o ka ikaika compressive 3d a me 28d, a ʻoi aku ka liʻiliʻi ma mua o ka benchmark mortar compressive ikaika, a no ka index o ka ikaika hoʻopaʻa, me ka hoʻohui ʻana i ka starch ether piʻi, piʻi mua ka ikaika o ka paʻa a laila emi, a ʻoi aku ka nui ma mua o ka waiwai o ka mortar benchmark. Ke hui pū ʻia ka cellulose ether me ka cellulose ether wale nō, e like me ka piʻi ʻana o ka nui o ka cellulose ether mai 0 a 0.6%, e emi mau ana ka paʻa o ka mortar i ka hoʻohālikelike ʻia me ka mortar kuhikuhi, akā ʻaʻole ia e emi iho ma mua o 90mm, e hōʻoiaʻiʻo ana i ke kūkulu maikaʻi ʻana o ka pahu. ʻO ka mortar, a me ka mānoanoa ʻike ʻia I ka manawa like, ʻoi aku ka haʻahaʻa o ka ikaika compressive o 3d a me 28d ma mua o ka mortar kuhikuhi, a e emi mau ana me ka hoʻonui ʻana o ka dosage, ʻoiai ke hoʻomaikaʻi nui ʻia ka ikaika paʻa. Inā he 0.4% ka nui o ka cellulose ether, ʻoi aku ka nui o ka ikaika hoʻopaʻa mortar, aneane ʻelua ʻelua o ka ikaika hoʻopaʻa mortar benchmark.

2.2 Nā hopena hoʻāʻo o ka hui hoʻohuihui

Wahi a ka lakene hui hoʻolālā i ka ratio admixture, ua hoʻomākaukau ʻia a hoʻāʻo ʻia ka mea hoʻohālikelike hoʻohui i hoʻohui ʻia, a ua loaʻa nā hopena o ka paʻa ʻana o ka mortar, ʻike maka, ikaika compressive a me ka ikaika paʻa.

2.2.1 ʻO ka mana o ka hoʻohuihui ʻia i ka paʻa ʻana o ka mortar

Loaʻa ka pihi kūlike e like me nā hopena hoʻāʻo o ka hui ʻana i nā admixtures. Hiki keʻikeʻia mai kēia mea i ka manawa o ka nui o ka cellulose ether he 0.2% a hiki i ka 0.6%, aʻo ka nui o ka starch ether he 0.03% a hiki i ka 0.07%, ua hui pūʻia nā meaʻelua i loko o ka mortar I ka hopena, me ka mālamaʻana i ka nui o hoʻokahi. ʻO nā mea hoʻohui, hoʻonui i ka nui o nā mea hoʻohui ʻē aʻe e alakaʻi i ka emi ʻana o ka paʻa o ka mortar. No ka mea, aia i loko o ka cellulose ether a me ka starch ether nā pūʻulu hydroxyl a me nā paʻa etera, hiki i nā ʻātoma hydrogen ma kēia mau pūʻulu a me nā molekole wai manuahi i loko o ka hui ʻana ke hana i nā paʻa hydrogen, i ʻike ʻia ai ka wai paʻa i loko o ka pahū a hoʻemi i ke kahe ʻana o ka pahū. , e emi mālie ana ka waiwai kūlike o ka mortar.

2.2.2 Ka hopena o ka hoʻohuihui ʻana i ka mea hoʻohuihui i ka ʻike ʻia o ka paʻakai

Ke hoʻohui ʻia ka cellulose ether a me ka starch ether i loko o ka pahū ma kekahi ʻano, e hoʻololi ʻia ka mānoanoa o ka mortar. Hiki ke ʻike ʻia ma nā hopena o ka hui ʻana o ka cellulose ether a me ka starch ether ma ke ʻano i hoʻolālā ʻia Ma hope o ka pahū, e mau ana ka nui o ka mortar ma kahi o 1750kg/m.³, oiai he 2110kg/m ka mānoanoa i ikeia o ka momi kuhikuhi³, a ʻo ka hui pū ʻana o nā mea ʻelua i loko o ka mortar e hāʻule ai ka mānoanoa ma kahi o 17%. Hiki ke ʻike ʻia ʻo ka hoʻohui ʻana i ka cellulose ether a me ka starch ether hiki ke hoʻemi pono i ka ʻike o ka mortar a e maʻalahi ka mortar. ʻO kēia no ka mea ʻo ka cellulose ether a me ka starch ether, e like me nā huahana etherification, he mea hui pū me ka hopena ea. ʻO ka hoʻohui ʻana i kēia mau mea hoʻohui ʻelua i ka mortar hiki ke hoʻohaʻahaʻa loa i ka nui o ka mortar.

2.2.3 Ka hopena o ka hoʻohuihui ʻia i ka ikaika compressive o ka pahū

Loaʻa ka 3d a me ka 28d compressive strength curve o ka mortar mai nā hopena o ka hoʻokolohua mortar. ʻO nā ikaika compressive o ka mortar benchmark 3d a me 28d he 15.4MPa a me 22.0MPa, a ma hope o ka hui ʻana o ka cellulose ether a me ka starch ether i loko o ka mortar, ʻo nā ikaika compressive o ka mortar 3d a me 28d he 12.8MPa a me 19.3MPa, kēlā me kēia. ʻoi aku ka haʻahaʻa ma mua o ka poʻe ʻaʻole ʻelua. ʻO kahi mortar benchmark me kahi mea hoʻohui. Mai ka mana o ka hui hoohuihui i ka ikaika compressive, hiki ke ike ia, ina paha he 3d a i ole 28d ka manawa hoola, e emi ana ka ikaika compressive o ka moa me ka hoonui ana i ka huina hui o cellulose ether a starch etera. ʻO kēia no ka mea ma hope o ka hui ʻana o ka cellulose ether a me ka starch ether, e hana nā ʻāpana latex i kahi ʻāpana lahilahi o ka polymer wai ʻole me ka sima, kahi mea e pale ai i ka hydration o ka sima a hoʻemi i ka ikaika compressive o ka mortar.

2.2.4 Ka hopena o ka hoʻohui ʻia ʻana ma luna o ka ikaika paʻa o ka mortar

Hiki ke ʻike ʻia mai ka mana o ka cellulose ether a me ka starch ether i ka ikaika paʻa o ka mortar ma hope o ka hoʻohui ʻia ʻana o ka mea i hoʻolālā ʻia a hui pū ʻia i loko o ka mortar. Ke 0.2% ~ 0.6% ka helu o ka cellulose ether, he 0.03% ~ 0.07% ka helu o ka starch ether, ma hope o ka hoʻohui ʻia ʻana o nā mea ʻelua i loko o ka mortar, me ka piʻi ʻana o ka nui o nā mea ʻelua, ka ikaika hoʻopaʻa o ka E piʻi mālie ka mortar ma mua, a ma hope o ka loaʻa ʻana o kahi waiwai, me ka piʻi ʻana o ka nui o ka hui ʻana, e piʻi mālie ka ikaika pipili o ka mortar. E emi mālie ana ka ikaika hoʻopaʻa, akā ʻoi aku ka nui ma mua o ka waiwai o ka ikaika hoʻopaʻa mortar benchmark. I ka hui ʻana me 0.4% cellulose ether a me 0.05% starch ether, hiki i ka ikaika hoʻopaʻa o ka mortar ke kiʻekiʻe loa, ʻo ia ka 1.5 mau manawa kiʻekiʻe ma mua o ka mortar benchmark. Eia naʻe, i ka wā iʻoi aku ka nui o ka ratio,ʻaʻole wale ka nui o ka viscosity o ka mortar, ua paʻakikī ke kūkuluʻana, akā, ua ho'ēmiʻia ka ikaika paʻa o ka mortar.

3. Ka hopena

(1) Hiki i ka cellulose ether a me ka starch ether ke hoʻemi nui i ke kūlike o ka mortar, a ʻoi aku ka maikaʻi o ka hopena ke hoʻohana pū ʻia nā mea ʻelua i kahi nui.

⑵Ma muli o ka ikaika o ka etherification huahana, ma hope o ka hoʻohui ʻana i ka cellulose ether a me ka starch ether, e nui aʻe ke kinoea i loko o ka mortar, no laila ma hope o ka hoʻohui ʻana i ka cellulose etera a me ka starch etera, e lilo ka ʻili pulu o ka mortar. hoemi loa ia, e alakai i ka hoemi like ana i ka ikaika compressive o ka mortar.

(3) Hiki i ka nui o ka cellulose ether a me ka starch ether ke hoʻomaikaʻi i ka ikaika hoʻopaʻa ʻana o ka mortar, a i ka wā e hoʻohana ʻia ai nā mea ʻelua i ka hui pū ʻana, ʻoi aku ka nui o ka hopena o ka hoʻomaikaʻi ʻana i ka ikaika paʻa o ka mortar. I ka hoʻohuiʻana i ka cellulose ether a me ka starch ether, pono e hōʻoia i ka nui o ka huiʻana. ʻAʻole hoʻopau wale ka nui o ka nui i nā mea waiwai, akā hoʻemi hoʻi i ka ikaika paʻa o ka mortar.

(4) Cellulose ether a starch ether, e like me ka hoʻohana mau ʻana i ka mortar admixtures, hiki ke hoʻololi nui i nā waiwai kūpono o ka mortar, ʻoi aku ka maikaʻi o ka hoʻomaikaʻi ʻana i ka paʻa ʻana a me ka ikaika hoʻopaʻa ʻana, a hāʻawi i ka ʻōlelo no ka hoʻohālikelike ʻana o nā mea hoʻohui maloʻo plastering.