Mmetụta nke Cellulose Ether na Njirimara Mortar

A mụrụ mmetụta nke ụdị abụọ cellulose ethers na arụmọrụ nke ngwa agha. Nsonaazụ gosiri na ụdị abụọ nke cellulose ethers nwere ike imeziwanye njide mmiri nke ngwa agha ma belata nkwụsi ike nke ngwa agha; A na-ebelata ike mkpakọ na ogo dị iche iche, ma ọnụ ọgụgụ mpịachi na ike njikọ nke ngwa agha na-abawanye na ogo dị iche iche, si otú a na-eme ka owuwu nke ngwa agha dịkwuo mma.

Isi okwu:cellulose ether; onye na-ejigide mmiri; ike nkekọ

Cellulose ether (MC)bụ ihe sitere na cellulose ihe okike. Cellulose ether nwere ike ji mee ihe dị ka mmiri njigide gị n'ụlọnga, thickener, ihe nkedo, dispersant, stabilizer, suspending gị n'ụlọnga, emulsifier na film-akpụ enyemaka, wdg N'ihi cellulose ether nwere ezigbo mmiri njigide na ndim mmetụta na ngwa agha, ọ pụrụ budata melite workability. nke ngwa agha, ya mere cellulose ether bụ ihe a na-ejikarị eme ihe na mmiri na-agbaze mmiri na ngwa agha.

1. Nnwale ihe na ụzọ ule

1.1 Akụrụngwa

Simenti: Simenti Portland nkịtị nke Jiaozuo Jianjian Cement Co., Ltd rụpụtara, nwere akara ike nke 42.5. Aja: Nanyang aja aja, ịdị mma modulus 2.75, aja ọkara. Cellulose ether (MC): C9101 nke ụlọ ọrụ Beijing Luojian mepụtara na HPMC nke Shanghai Huiguang Company mepụtara.

1.2 Usoro ule

N'ime ọmụmụ ihe a, nha nke lime-aja bụ 1: 2, na mmiri-ciment ruru 0,45; A na-ebu ụzọ gwakọta cellulose ether na ciment, mgbe ahụ, a na-agbakwunye ájá ma kpalie ya nke ọma. A na-agbakọ usoro nke cellulose ether dị ka pasent ciment si dị.

A na-eme ule ike mkpakọ na ule nkwụsi ike na-ezo aka na JGJ 70-90 "Ụzọ nnwale maka njirimara bụ isi nke Mortar Building". A na-eme ule ike mgbanwe dị ka GB/T 17671-1999 "Cement Mortar Strength Test".

Emere ule njide mmiri ahụ dịka usoro akwụkwọ nzacha ejiri mee ihe n'ụlọ ọrụ mmepụta ihe na-emepụta ihe nke French. Usoro a kapịrị ọnụ bụ nke a: (1) tinye akwụkwọ nzacha 5 ngwa ngwa n'efere okirikiri rọba, ma tụọ oke ya; (2) tinye otu na kọntaktị ozugbo na ngwa agha Debe akwụkwọ nzacha dị elu na akwụkwọ nzacha ngwa ngwa, wee pịa cylinder nke nwere dayameta dị n'ime nke 56 mm na ịdị elu nke 55 mm na akwụkwọ nzacha ngwa ngwa; (3) Wunye ngwa agha n'ime cylinder; (4) Mgbe ngwa ngwa na kọntaktị akwụkwọ nzacha maka nkeji iri na ise, tụọ ọzọ Ogo nke akwụkwọ nzacha ngwa ngwa na diski plastik; (5) Gbakọọ oke mmiri na-etinye n'ime akwụkwọ nzacha ngwa ngwa kwa mpaghara square mita, nke bụ ọnụego nnabata mmiri; (6) Ọnụọgụ nnabata mmiri bụ akara mgbakọ na mwepụ nke nsonaazụ ule abụọ ahụ. Ọ bụrụ na ọdịiche dị n'etiti ọnụego ọnụego gafere 10%, a ga-emeghachi ule ahụ ọzọ; (7) A na-egosipụta njigide mmiri nke ngwa agha site na ọnụego nnabata mmiri.

Emere ule ike njikọ ahụ site n'ịtụ aka na usoro nke Japan Society for Materials Sayensị tụrụ aro, na ike nke njikọ ahụ bụ ike mgbanwe. Nnwale ahụ na-anabata ihe nlele prism nke nha ya bụ 160mm×40mm×40mm. A gwọrọ ihe atụ ngwa ngwa a na-ebu ụzọ mee tupu afọ 28 d, wee bee ụzọ abụọ. A na-eme akụkụ abụọ nke ihe nlele ahụ ka ọ bụrụ ihe nlele nke nwere ngwa agha nkịtị ma ọ bụ ụrọ polymer, wee gwọọ ya n'ime ụlọ ruo afọ ụfọdụ, wee nwalee dịka usoro ule siri dị maka ike mgbanwe nke ngwa ngwa ciment.

2. Nnwale ule na nyocha

2.1 Nkwekọrịta

Site na mmetụta nke cellulose ether na-agbanwe agbanwe nke ngwa agha, ọ pụrụ ịhụ na na-abawanye nke ọdịnaya nke cellulose ether, agbanwe agbanwe nke ngwa agha ihu ọma na-egosi a ala na-emekarị, na mbelata nke agbanwe agbanwe nke ngwa agha agwakọta na HPMC bụ ngwa ngwa. karịa nke ngwa agha agwakọta ya na C9101. Nke a bụ n'ihi na viscosity nke cellulose ether na-egbochi eruba nke ngwa agha, na viscosity nke HPMC dị elu karịa nke C9101.

2.2 Njide mmiri

N'ime ngwa agha, ihe cimenti dị ka ciment na gypsum kwesịrị iji mmiri mee ka mmiri na-edozi ya. Ọnụ ọgụgụ dị mma nke cellulose ether nwere ike idobe mmiri dị na ngwa ngwa ruo ogologo oge, ka nhazi na usoro siri ike nwee ike ịga n'ihu.

Site na mmetụta nke cellulose ether ọdịnaya na njide mmiri nke ngwa agha, a pụrụ ịhụ na: (1) Na mmụba nke C9101 ma ọ bụ HPMC cellulose ether ọdịnaya, mmiri absorption ọnụego nke ngwa agha na-ebelata nke ukwuu, ya bụ, mmiri na-ejigide. emelitere ngwa agha nke ọma, ọkachasị mgbe agwakọtara ya na Mortar nke HPMC. Enwere ike imezi njide mmiri ya karịa; (2) Mgbe ego nke HPMC bụ 0.05% ruo 0.10%, ngwa agha ahụ na-emezu ihe achọrọ maka njigide mmiri na usoro ihe owuwu.

Ma cellulose ethers bụ ndị na-abụghị ionic polymers. Otu hydroxyl dị na cellulose ether molecular chain na oxygen atoms na ether bonds nwere ike ịmepụta njikọ hydrogen na ụmụ irighiri mmiri, na-eme ka mmiri efu banye na mmiri agbụ, si otú ahụ na-arụ ọrụ dị mma na njide mmiri.

Njide mmiri nke cellulose ether na-adabere na viscosity ya, nha nha, ọnụego mgbasa na mgbakwunye ego. N'ozuzu, ka ọnụ ọgụgụ ahụ agbakwunyere, nke dị elu nke viscosity, na mma dị mma, na-eme ka mmiri dị elu. Ma C9101 na HPMC cellulose ether nwere methoxy na hydroxypropoxy dị iche iche na molekụla yinye, ma ọdịnaya nke methoxy na HPMC cellulose ether dị elu karịa nke C9101, na viscosity nke HPMC dị elu karịa nke C9101, ya mere njigide mmiri nke ngwa agha. agwakọta ya na HPMC dị elu karịa nke ngwa agha agwakọta na HPMC C9101 nnukwu ngwa agha. Otú ọ dị, ọ bụrụ na viscosity na ịdị arọ molekụla nke cellulose ether dị oke elu, solubility ya ga-ebelata ya, nke ga-enwe mmetụta na-adịghị mma na ike na ịrụ ọrụ nke ngwa agha. Ike nhazi iji nweta mmetụta njikọta dị mma.

2.3 ike mgbanwe na ike mkpakọ

Site na mmetụta nke cellulose ether na ike mgbanwe na mkpakọ nke ngwa agha, a pụrụ ịhụ na mmụba nke ọdịnaya nke cellulose ether, ike na-emegharị na ike nke ngwa agha na ụbọchị 7 na 28 gosipụtara ọnọdụ ala. Nke a bụ n'ihi na: (1) Mgbe a na-agbakwunye cellulose ether na ngwa agha ahụ, polymers na-agbanwe agbanwe na pores nke ngwa agha ahụ na-abawanye, na ndị polymer ndị a na-agbanwe agbanwe enweghị ike inye nkwado siri ike mgbe a na-ejikọta matrix composite. N'ihi ya, ike mgbanwe na mkpakọ nke ngwa agha na-ebelata; (2) Site na mmụba nke ọdịnaya cellulose ether, mmetụta njigide mmiri ya na-akawanye mma, nke mere na mgbe e guzobere ngọngọ ule ngwa agha, porosity na ngọngọ ule ngwa agha na-abawanye , ike na-agbanwe agbanwe na mkpakọ ga-ebelata. ; (3) mgbe a na-agwakọta ngwa ngwa akọrọ akọrọ na mmiri, a na-ebu ụzọ tinye akụkụ cellulose ether latex n'elu akụkụ ciment iji mepụta ihe nkiri latex, nke na-ebelata hydration nke ciment, si otú ahụ na-ebelata ike nke ciment. ngwa agha ahụ.

Oke 2.4 folda

Mgbanwe nke ngwa agha ahụ na-eme ka ngwa agha ahụ nwee nrụrụ dị mma, nke na-enyere ya aka ime mgbanwe na nrụgide nke mbelata na nrụrụ nke mkpụrụ ahụ na-ebute, si otú a na-eme ka njikọ na ịdịte aka nke ngwa agha ahụ dịkwuo mma.

Site na mmetụta nke cellulose ether ọdịnaya na ngwa mpịakọta folding ratio (ff/fo), a pụrụ ịhụ na na mmụba nke cellulose ether C9101 na HPMC ọdịnaya, ngwa agha mpịachi ruru n'ụzọ bụ isi gosiri na-amụba omume, na-egosi na mgbanwe nke ngwa agha bụ. emeziwanye.

Mgbe ether cellulose na-agbaze n'ime ngwa agha ahụ, n'ihi na methoxyl na hydroxypropoxyl na agbụ molekụla ga-emeghachi omume na Ca2 + na Al3 + na slurry, a na-emepụta gel viscous ma jupụta na oghere ciment ngwa ngwa, ya mere Ọ na-arụ ọrụ nke ndochi na-agbanwe agbanwe. na nkwado nke na-agbanwe agbanwe, na-eme ka kọmpat nke ngwa agha ahụ dịkwuo mma, ọ na-egosikwa na mgbanwe nke ngwa agha a gbanwere na-emeziwanye macroscopically.

2.5 Bond ike

Site na mmetụta nke cellulose ether ọdịnaya na ngwa agha njikọ ike, a pụrụ ịhụ na ngwa agha njikọ ike na-abawanye na cellulose ether ọdịnaya.

Mgbakwunye nke cellulose ether nwere ike ịmepụta oyi akwa nke ihe nkiri polymer na-adịghị mmiri n'etiti cellulose ether na hydrated cement particles. Ihe nkiri a nwere mmetụta mkpuchi ma na-emeziwanye ihe ngosi nke ngwa ngwa "elu ala akọrọ". N'ihi njigide mmiri dị mma nke cellulose ether, a na-echekwa mmiri zuru oke n'ime ngwa agha ahụ, si otú ahụ na-eme ka hydration sie ike nke ciment na mmepe zuru oke nke ike ya, na imeziwanye ike njikọ nke ciment mado. Tụkwasị na nke ahụ, mgbakwunye nke cellulose ether na-eme ka njikọ nke ngwa agha dịkwuo mma, na-eme ka ngwa agha ahụ nwee ezigbo plasticity na mgbanwe, nke na-emekwa ka ngwa agha ahụ nwee ike ime mgbanwe na nkwụsị nke mkpụrụ osisi ahụ, si otú ahụ na-eme ka njikọ nke ngwa agha dịkwuo mma. .

2.6 Mbelata

Enwere ike ịhụ ya site na mmetụta nke cellulose ether ọdịnaya na mbelata nke ngwa agha: (1) Uru mbelata nke cellulose ether mortar dị nnọọ ala karịa nke oghere oghere. (2) Site na mmụba nke ọdịnaya C9101, uru mbelata nke ngwa agha ji nwayọọ nwayọọ belata, mana mgbe ọdịnaya ruru 0.30%, uru mbelata nke ngwa agha mụbara. Nke a bụ n'ihi na ka ọnụ ọgụgụ cellulose ether dị ukwuu, ka viscosity ya dịkwuo ukwuu, nke na-eme ka mmụba nke mmiri na-achọ. (3) Site na mmụba nke ọdịnaya HPMC, uru mbelata nke ngwa agha ji nwayọọ nwayọọ belata, mana mgbe ọdịnaya ya ruru 0.20%, uru mbelata nke ngwa agha mụbara wee belata. Nke a bụ n'ihi na viscosity nke HPMC karịrị nke C9101. Nke dị elu viscosity nke cellulose ether. Ka mma nkedo mmiri, ka ikuku ikuku na-abawanye, mgbe ikuku ikuku ruru ọkwa ụfọdụ, uru mbelata nke ngwa agha ga-abawanye. Ya mere, na okwu nke shrinkage uru, ezigbo usoro onunu ogwu nke C9101 bụ 0.05% ~ 0.20%. Usoro kachasị mma nke HPMC bụ 0.05% ~ 0.10%.

3. Nkwubi okwu

1. Cellulose ether nwere ike melite njigide mmiri nke ngwa agha ma belata nkwụsị nke ngwa agha. Ịmezi ọnụ ọgụgụ nke cellulose ether nwere ike izute mkpa ngwa agha eji arụ ọrụ dị iche iche.

2. Mgbakwunye nke cellulose ether na-ebelata ike na-agbanwe agbanwe na ike mkpakọ nke ngwa agha, ma na-eme ka ọnụọgụ mpịachi na ike jikọta ruo n'ókè ụfọdụ, si otú ahụ na-eme ka ike dị ogologo nke ngwa agha ahụ dịkwuo elu.

3. Mgbakwunye nke cellulose ether nwere ike imeziwanye arụmọrụ nke ngwa ngwa, na mmụba nke ọdịnaya ya, uru nke ngwa ngwa na-aghọ obere ma dị ntakịrị. Ma mgbe ọnụọgụ cellulose ether ruru ọkwa ụfọdụ, uru mbelata nke ngwa agha na-abawanye ruo n'ókè ụfọdụ n'ihi mmụba nke ikuku-entraning ego.