ʻO Hydroxypropyl methylcellulose ether ma nā waiwai o ka lehu lele

Ua aʻo ʻia ka hopena o ka hydroxypropyl methylcellulose ether ma nā waiwai o ka lehu lehu lele, a ua ʻike ʻia ka pilina ma waena o ka pulu a me ka ikaika compressive. Hōʻike nā hopena hoʻāʻo i ka hoʻohui ʻana i ka hydroxypropyl methylcellulose ether i ka lele lehu lehu hiki ke hoʻomaikaʻi maikaʻi i ka hana paʻa ʻana o ka wai, hoʻolōʻihi i ka manawa paʻa o ka momi, a hoʻemi i ka mākū a me ka ikaika compressive o ka mortar. Loaʻa ka pilina maikaʻi ma waena o ka mākū a me ka ikaika compressive 28d. Ma lalo o ke kūlana o ka mākū mākū i ʻike ʻia, hiki ke helu ʻia ka ikaika compressive 28d me ka hoʻohana ʻana i ke ʻano kūpono.

Hua'ōlelo nui:lehu lele; cellulose ether; paʻa wai; ikaika compressive; hoopili ana

I kēia manawa, hoʻohana nui ʻia ka lehu lele i ka ʻenehana kūkulu hale. ʻO ka hoʻohui ʻana i kahi nui o ka lehu lele i loko o ka mortar ʻaʻole hiki ke hoʻomaikaʻi wale i nā waiwai mechanical a me ka lōʻihi o ka mortar, akā e hōʻemi hoʻi i ke kumukūʻai o ka mortar. Eia nō naʻe, ʻaʻole lawa ka paʻa ʻana o ka wai lehu lele, no laila pehea e hoʻomaikaʻi ai i ka paʻa ʻana o ka wai i lilo i pilikia koʻikoʻi e hoʻoponopono ʻia. ʻO ka cellulose ether kahi hui hoʻohui kiʻekiʻe i hoʻohana mau ʻia ma ka home a ma waho. Pono e hoʻohui ʻia i kahi liʻiliʻi e loaʻa ai ka hopena nui i nā hōʻailona hana e like me ka paʻa ʻana o ka wai a me ka ikaika compressive o ka mortar.

1. Nā mea maka a me nā ʻano hoʻāʻo

1.1 Mea maka

ʻO ka sima ʻo P·ʻO 42.5 kima Portland maʻamau i hana ʻia e Hangzhou Meiya Cement Factory; he pae ka lehu leleⅡlehu; ʻO ke one he one maʻamau maʻamau me ka modulus fineness o 2.3, kahi ʻāpana nui o 1499kg·m-3, a me ka makū o 0.14 %, lepo 0.72%; ʻO ka hydroxypropyl methyl cellulose ether (HPMC) i hanaʻia e Shandong Heda Co., Ltd.,ʻo 75HD100000 ka brand; ʻo ka wai hui ʻia he wai pila.

1.2 Hoʻomākaukau ʻana i ka pahū

I ka hui ʻana i ka mortar cellulose etera, e hui mua i ka HPMC me ka sima a lele maikaʻi i ka lehu, a laila maloʻo me ke one no 30 kekona, a laila e hoʻohui i ka wai a hui ʻia ʻaʻole i emi iho ma mua o 180 kekona.

1.3 Ke ʻano hoʻāʻo

E ana ʻia ke kūlike, ka mākū, ka delamination a me ka manawa hoʻonohonoho o ka mortar hou i hui pū ʻia e like me nā lula pili ma JGJ70-90 "Nā Hana Hana Hana Kūʻai o ke kūkulu ʻana i ka mortar". Hoʻoholo ʻia ka paʻa ʻana o ka wai e like me ke ʻano hoʻāʻo no ka mālama ʻana i ka wai o ka mortar ma Appendix A o JG/T 230-2007 "Ready Mixed Mortar". Hoʻohana ka hoʻāʻo ikaika compressive i kahi 70.7mm x 70.7mm x 70.7mm cube bottomed test mold. Hoʻōla ʻia ka poloka hoʻāʻo i kūkulu ʻia ma kahi mahana o (20±2)°C no 24 mau hola, a ma hope o ka demoulding, hoʻomau ʻia e hoʻōla ʻia i loko o kahi kaiapuni me kahi mahana o (20±2)°C a me ka humidity pili ma luna o 90% i ka predetermined makahiki, e like me JGJ70-90 "Kūkulu Mortar Basic hana ho'āʻo hana" hooholo o kona compressive ikaika.

2. Nā hopena hoʻāʻo a me ka nānā ʻana

2.1 Māmā pulu

Hiki ke ʻike ʻia ma ka pilina ma waena o ka mānoanoa a me ka nui o ka HPMC e hoʻemi mālie ana ka mākū me ka piʻi ʻana o ka nui o ka HPMC. Inā he 0.05% ka nui o ka HPMC, ʻo 96.8% ka mākū o ka momi. Ke hoʻomau nei ka nui o ka HPMC e hoʻonui, Hoʻomaka ka emi ʻana o ka māmā māmā. Inā he 0.20% ka helu o ka HPMC, ʻo 81.5% wale nō o ka mortar benchmark. ʻO ka mea nui kēia ma muli o ka hopena o ka ea o HPMC. ʻO nā ʻōhū ea i hoʻokomo ʻia e hoʻonui i ka porosity o ka mortar a hoʻemi i ka compactness, ka hopena i ka emi ʻana o ka nui o ka mortar.

2.2 Hoʻonohonoho manawa

Hiki ke ʻike ʻia mai ka pilina ma waena o ka manawa coagulation a me ka nui o ka HPMC e piʻi mālie ana ka manawa coagulation. Ke 0.20% ka dosage, hoʻonui ka manawa hoʻonohonoho e 29.8% i hoʻohālikelike ʻia me ka mortar kuhikuhi, a hiki i kahi 300min. Hiki ke ʻike ʻia inā he 0.20% ka dosage, he loli nui ka manawa hoʻonohonoho. ʻO ke kumu ʻo L Schmitz et al. manaʻoʻiʻo ua hoʻopili nui ʻia nā molekole etera cellulose ma nā huahana hydration e like me ka cSH a me ka calcium hydroxide, a ʻaʻole loa e hoʻopili ʻia ma ka māhele mineral mua o ka clinker. Eia kekahi, ma muli o ka piʻi ʻana o ka viscosity o ka solution pore, hoʻemi ka cellulose ether. ʻO ka neʻe ʻana o nā ion (Ca2+, so42-…) i loko o ka solution pore e hoʻopaneʻe hou i ke kaʻina hydration.

2.3 Layering a me ka paʻa wai

Hiki i ke degere o ka delamination a me ka paʻa ʻana o ka wai ke ʻike i ka hopena paʻa wai o ka mortar. Mai ka pilina ma waena o ke kiʻekiʻe o ka delamination a me ka nui o ka HPMC, hiki ke ʻike ʻia ke kiʻekiʻe o ka delamination e hōʻike ana i ka emi ʻana o ke ʻano e like me ka piʻi ʻana o ka HPMC. Ke 0.05% ka maʻiʻo o ka HPMC, e emi loa ka degere o ka delamination, e hōʻike ana i ka wā liʻiliʻi o ka maʻiʻo o ka fiber ether, hiki ke hoʻemi nui ʻia ke kiʻekiʻe o ka delamination, hiki ke hoʻomaikaʻi ʻia ka hopena o ka paʻa ʻana o ka wai, a me ka hana a me ka hana. hiki ke hoʻomaikaʻi i ka hana o ka mortar. Ke hoʻoholo nei i ka pilina ma waena o ka waiwai wai a me ka nui o ka HPMC, i ka piʻi ʻana o ka nui o ka HPMC, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai. I ka emi ʻana o ka dosage ma mua o 0.15%, piʻi mālie ka hopena o ka mālama ʻana i ka wai, akā i ka hiki ʻana o ka dosage i 0.20%, ua hoʻomaikaʻi maikaʻi ʻia ka hopena paʻa wai, mai 90.1% ke 0.15% a hiki i 95%. Ke hoʻomau nei ka nui o ka HPMC i ka hoʻonui, a hoʻomaka ka hana ʻana o ka mortar i ka pōʻino. No laila, e noʻonoʻo ana i ka hana paʻa wai a me ka hana kūkulu ʻana, ʻo ka nui kūpono o HPMC he 0.10% ~ 0.20%. Ka nānā 'ana i kāna hana ho'opa'a wai: Cellulose ether he polymer organik hiki ke ho'ohehe'e wai, i māhele 'ia i ka ionic a me ka non-ionic. ʻO ka HPMC he cellulose ether non-ionic me kahi hui hydrophilic, kahi hui hydroxyl (-OH) a me kahi paʻa etera (-0-1) ma kāna ʻano hana. Ke hoʻoheheʻe ʻia i loko o ka wai, ʻo nā ʻātoma oxygen ma ka hui hydroxyl a me ka paʻa etera a me ka wai Molecules hui e hana i nā paʻa hydrogen, ka mea e nalowale ai ka wai, a ʻaʻole manuahi ka wai manuahi, pēlā e loaʻa ai ka hopena o ka paʻa ʻana o ka wai a me ka mānoanoa.

2.4 Ka ikaika compressive

Mai ka pilina ma waena o ka ikaika compressive a me ka nui o ka HPMC, hiki ke ʻike ʻia me ka piʻi ʻana o ka nui o ka HPMC, ua hōʻike ka ikaika compressive o 7d a me 28d i ka emi ʻana, ʻo ia ka mea ma muli o ka hoʻokomo ʻana i kahi helu nui. o na ea ea e HPMC, ka mea i hoonui loa i ka porosity o ka moka. mahuahua, e emi ana ka ikaika. I ka 0.05% o ka ʻike, hāʻule nui ka ikaika compressive 7d, hāʻule ka ikaika ma 21.0%, a hāʻule ka ikaika compressive 28d e 26.6%. Hiki ke ʻike ʻia mai ka pihi ʻike ʻia ka hopena o ka HPMC i ka ikaika compressive. Ke liʻiliʻi loa ka dosage, e hoʻemi nui ʻia. No laila, i nā noi kūpono, pono e hoʻomalu ʻia kāna dosage a hoʻohana pū ʻia me kahi defoamer. Ke noiʻi nei i ke kumu, ʻo Guan Xuemao et al. manaʻoʻiʻo ʻo ka mea mua, i ka wā e hoʻohui ʻia ai ka cellulose ether i ka mortar, e hoʻonui ʻia ka polymer flexible i nā pores mortar, a ʻaʻole hiki i kēia mau polymers a me nā pores hiki ke hāʻawi i ke kākoʻo paʻa i ka wā e hoʻopili ʻia ai ka poloka hoʻāʻo. Hoʻonāwaliwali ʻia ka matrix composite, ma laila e hoʻemi ai i ka ikaika compressive o ka mortar; ʻO ka lua, ma muli o ka hopena o ka mālama ʻana i ka wai o cellulose ether, ma hope o ka hoʻokumu ʻia ʻana o ka poloka hoʻāʻo mortar, ʻo ka hapa nui o ka wai i loko o ka palaki, a ʻoi aku ka haʻahaʻa o ka lākiō wai-cement ma mua o kēlā me ka ʻole o ka poʻe nui loa, no laila ka ikaika compressive. e hoemi loa ia o ka moka.

2.5 Ka pilina ma waena o ka ikaika compressive a me ka pulu pulu

Hiki ke ʻike ʻia mai ka pānaʻi pili ma waena o ka ikaika compressive a me ka pulu pulu ma hope o ka hoʻopili ʻana i ka laina o nā kiko a pau o ke kiʻi, ua māhele maikaʻi ʻia nā kiko kūpono ma nā ʻaoʻao ʻelua o ka laina kūpono, a aia ka pilina maikaʻi ma waena o ka pulu a me ka compressive. ʻano ikaika, a maʻalahi a maʻalahi hoʻi ke ana ʻana o ka pulu pulu, no laila hiki ke helu ʻia ka ikaika compressive o ka mortar 28d ma o ka hoʻohālikelike laina kūpono. Hōʻike ʻia ka haʻihaʻi hoʻohālikelike laina ma ke ʻano (1), R²=0.9704. Y=0.0195X-27.3 (1), kahi, ʻo y ka 28d ikaika compressive o ka pahū, MPa; ʻO X ka mānoanoa pulu, kg m-3.

3. Ka hopena

Hiki i ka HPMC ke hoʻomaikaʻi i ka hopena o ka mālama ʻana i ka wai o ka pahu lehu lele a hoʻolōʻihi i ka manawa hana o ka mortar. I ka manawa like, ma muli o ka piʻi ʻana o ka porosity o ka mortar, e hāʻule ka nui o ka nui a me ka ikaika compressive, no laila e koho ʻia ke ʻano kūpono i ka noi. ʻO ka ikaika compressive 28d o ka mortar he pilina maikaʻi me ka momona momona, a hiki ke helu ʻia ka ikaika compressive 28d ma ke ana ʻana i ka momona momona, a he waiwai koʻikoʻi koʻikoʻi no ka hoʻokele maikaʻi ʻana o ka mortar i ka wā o ke kūkulu ʻana.