Cellulose Ether na Starch Ether na Njirimara nke Ngwakọta Ngwakọta Akọrọ

A na-ejikọta ọnụ ọgụgụ dị iche iche nke cellulose ether na starch ether n'ime ngwa ngwa agwakọta akọrọ, na nkwekọ, njupụta pụtara ìhè, ike mkpakọ na ike njikọ nke ngwa agha ka a mụrụ site na nnwale. Nsonaazụ na-egosi na cellulose ether na starch ether nwere ike imeziwanye arụmọrụ nke ngwa ngwa ngwa ngwa, ma mgbe ejiri ha mee ihe n'ụzọ kwesịrị ekwesị, arụmọrụ ngwa ngwa ga-aka mma.

Isi okwu: cellulose ether; starch ether; ngwa ngwa agwakọta akọrọ

Ngwa agha ọdịnala nwere ọghọm dị na ọbara ọgbụgba dị mfe, mgbawa na ike dị ala. Ọ dịghị mfe imezu ihe ndị dị mma chọrọ nke ụlọ ndị dị elu, ọ dịkwa mfe ime mkpọtụ na mmetọ gburugburu ebe obibi n'oge usoro mmepụta. Site na mmụba nke ihe ndị mmadụ chọrọ maka iwulite ịdịmma na gburugburu ebe obibi, ngwa agha agwakọtara nkụ nke nwere arụmọrụ zuru oke ka ejirila ọtụtụ ebe. Ngwa ngwa agwakọta akọrọ, nke a makwaara dị ka ngwa ngwa agwakọta akọrọ, bụ ngwaahịa emechara nke ọma nke jikọtara ya na ihe simenti, ngwakọta dị mma, na mgbakwunye n'otu akụkụ. A na-ebuga ya na ebe a na-ewu ihe na akpa ma ọ bụ na nnukwu maka ịgwakọta mmiri.

Cellulose ether na starch ether bụ ngwa ngwa abụọ a na-ejikarị eme ihe. Cellulose ether bụ isi unit nhazi nke anhydroglucose enwetara site eke cellulose site etherification mmeghachi omume. Ọ bụ ihe polymer na-agbaze mmiri ma na-emekarị dị ka mmanu na ngwa agha. Ọzọkwa, ọ nwere ike belata uru na-agbanwe agbanwe nke ngwa agha ahụ, meziwanye ọrụ nke ngwa agha ahụ, mee ka ọnụ ọgụgụ nke mmiri na-ejide mmiri na-ebelata, ma belata ohere ịgbawa nke mkpuchi mkpuchi. Starch ether bụ starch nọchiri anya ether nke etolite site na mmeghachi omume nke otu hydroxyl na starch molecules nwere ihe na-arụ ọrụ. Ọ nwere ikike ịgbatị ngwa ngwa ngwa ngwa, yana obere usoro onunu ogwu nwere ike nweta nsonaazụ dị mma. A na-ejikọta ya na cellulose n'ime ngwa agha eji eme ihe na ether.

1. Nnwale

1.1 Akụrụngwa

Cement: Ishii P·O42.5R ciment, oriri mmiri na-agbanwe agbanwe 26.6%.

Aja: aja ọkara, ịdị mma modulus 2.7.

Cellulose ether: hydroxypropyl methylcellulose ether (HPMC), viscosity 90000MPa·s (2% ngwọta mmiri, 20°C), nke Shandong Yiteng New Material Co., Ltd. nyere.

Starch ether: hydroxypropyl starch ether (HPS), nke Guangzhou Moke Building Materials Technology Co., Ltd nyere.

Mmiri: mmiri mgbata.

1.2 Usoro ule

Dị ka ụzọ ndị e depụtara na "Ụkpụrụ maka Basic Performance Testzọ Nleba Ụlọ Mmanya" JGJ / T70 na "Nka na ụzụ Iwu maka Plastering Mortar" JGJ / T220, a na-eme nkwadebe nke samples na nchọpụta nke arụmọrụ paramita.

N'ime ule a, a na-ekpebi oriri mmiri nke benchmark mortar DP-M15 na nkwekọ nke 98mm na ngwa ngwa bụ ciment: ájá: mmiri = 1: 4: 0.8. Usoro onunu ogwu nke cellulose ether na ngwa agha bụ 0-0.6%, na usoro nke starch ether bụ 0-0.07%. Site n'ịgbanwe usoro onunu ogwu nke cellulose ether na starch ether, a na-achọpụta na mgbanwe nke dose nke admixture nwere mmetụta na ngwa agha. mmetụta na arụmọrụ metụtara ya. A na-agbakọ ọdịnaya nke cellulose ether na starch ether dị ka pasent nke ciment uka.

2. Nnwale ule na nyocha

2.1 Nsonaazụ ule na nyocha nke otu-doped admixture

Dị ka ọnụ ọgụgụ nke atụmatụ nnwale ahụ a kpọtụrụ aha n'elu si dị, a na-eme nnwale ahụ, a na-enwetakwa mmetụta nke otu ngwakọta ngwakọta na nkwụsi ike, njupụta pụtara ìhè, ike mkpakọ na ike njikọ nke ngwa agha akọrọ akọrọ.

N'ịtụle nsonaazụ ule nke admixtures na-agwakọta otu, enwere ike ịhụ na mgbe starch ether na-agwakọta naanị ya, nkwụsi ike nke ngwa agha na-ebelata mgbe niile ma e jiri ya tụnyere benchmark ngwa agha na mmụba nke ọnụ ọgụgụ starch ether, na njupụta pụtara ìhè. ngwa agha ga-abawanye na mmụba nke ego. Na-ebelata, ma mgbe niile ukwuu karịa benchmark ngwa agha doro anya njupụta, ngwa agha 3D na 28d compressive ike ga-anọgide na-ebelata, na mgbe niile na-erughị benchmark ngwa agha compressive ike, na maka index nke bonding ike, na mgbakwunye na nke starch ether na-abawanye, na ike nkekọ na-ebu ụzọ na-abawanye wee na-ebelata, ma na-akakarị uru nke ngwa ngwa benchmark. Mgbe a na-ejikọta cellulose ether na cellulose ether naanị, dị ka ọnụ ọgụgụ nke cellulose ether na-abawanye site na 0 ruo 0.6%, nkwụsị nke ngwa agha na-ebelata mgbe niile ma e jiri ya tụnyere ụrọ ntụaka, ma ọ bụghị ihe na-erughị 90mm, nke na-eme ka ọ dị mma na-ewu ụlọ. ngwa agha, na njupụta pụtara ìhè nwere N'otu oge ahụ, ike mkpakọ nke 3d na 28d dị ala karịa nke ụrọ ntụaka, ọ na-ebelata na-aga n'ihu na mmụba nke usoro onunu ogwu, ebe ike njikọ na-akawanye mma. Mgbe usoro onunu ogwu nke cellulose ether bụ 0.4%, ike njigide ngwa agha bụ nke kachasị ukwuu, ihe fọrọ nke nta ka ọ bụrụ okpukpu abụọ nke ike njigide ngwa agha.

2.2 Nsonaazụ nnwale nke ngwakọta agwakọta

Dị ka imewe mix ruru na admixture ruru, agwakọta admixture ngwa agha sample e njikere na nwale, na nsonaazụ nke ngwa agha agbanwe agbanwe, pụtara njupụta, mkpakọ ike na bonding ike nwetara.

2.2.1 Mmetụta nke ngwakọta ngwakọta na nkwụsi ike nke ngwa agha

A na-enweta usoro nkwụsi ike dịka nsonaazụ nyocha nke ngwakọta ngwakọta. Enwere ike ịhụ site na nke a na mgbe ọnụọgụ cellulose ether bụ 0.2% ruo 0.6%, na ọnụ ọgụgụ nke starch ether bụ 0.03% na 0.07%, a na-agwakọta ha abụọ n'ime ngwa agha N'ikpeazụ, ebe a na-ejigide ego nke otu. nke admixtures, ịba ụba nke ihe mgbakwunye ọzọ ga-eduga n'ịbelata nkwụsị nke ngwa agha ahụ. Ebe ọ bụ na ether cellulose na starch ether nwere hydroxyl dị iche iche na ether bonds, hydrogen atom na otu ndị a na free mmiri molekul na ngwakọta nwere ike ịmepụta hydrogen bonds, nke mere na ọzọ agbụ mmiri na-apụta na ngwa agha na-ebelata eruba nke ngwa agha. , na-eme ka ọnụ ahịa ngwa ngwa ji nwayọọ nwayọọ belata.

2.2.2 Mmetụta nke ịgbakọta admixture na njupụta doro anya nke ngwa agha

Mgbe a na-agwakọta cellulose ether na starch ether n'ime ngwa agha n'otu usoro ọgwụgwọ, njupụta nke ngwa agha ahụ ga-agbanwe. Enwere ike ịhụ site na nsonaazụ ya na ngwakọta nke cellulose ether na starch ether na usoro a haziri Mgbe ngwa agha gasịrị, njupụta nke ngwa agha ahụ na-anọgide na ihe dịka 1750kg / m.³, ebe njupụta doro anya nke ngwa agha ntụaka bụ 2110kg / m³, na ngwakọta nke abụọ n'ime ngwa agha ahụ na-eme ka njupụta pụtara ìhè daa ihe dịka 17%. Enwere ike ịhụ na ijikọ cellulose ether na starch ether nwere ike ibelata njupụta ngwa ngwa pụtara nke ọma ma mee ka ngwa agha ahụ dị ọkụ. Nke a bụ n'ihi na cellulose ether na starch ether, dị ka etherification ngwaahịa, bụ admixtures na ike ikuku-entraning mmetụta. Ịtinye ngwakọta abụọ a na ngwa agha nwere ike ibelata njupụta nke ngwa agha pụtara nke ọma.

2.2.3 Mmetụta nke agwakọta admixture na mkpakọ ike nke ngwa agha

A na-enweta akụkụ 3d na 28d ike mkpakọ nke ngwa agha site na nsonaazụ nke ule ngwa agha ahụ. Ike mkpakọ nke benchmark mortar 3d na 28d bụ 15.4MPa na 22.0MPa, otu n'otu n'otu, na mgbe ejikọta cellulose ether na starch ether n'ime ngwa agha, ike mkpakọ nke ngwa agha 3d na 28d bụ 12.8MPa na 19.3MPa, nke, nke, dị ala karịa ndị na-enweghị abụọ. Ngwa ngwa benchmark nwere admixture. Site na mmetụta nke ngwakọta ngwakọta na ike mkpakọ, enwere ike ịhụ na n'agbanyeghị ma oge ọgwụgwọ ọ bụ 3d ma ọ bụ 28d, ike mkpakọ nke ngwa agha na-ebelata na mmụba nke ọnụ ọgụgụ cellulose ether na starch ether. Nke a bụ n'ihi na mgbe agwakọta cellulose ether na starch ether, ihe ndị dị na latex ga-eme ka mmiri dị nro nke polymer na-adịghị na ya na ciment, nke na-egbochi hydration nke ciment ma na-ebelata ike mkpakọ nke ngwa agha.

2.2.4 Mmetụta nke agwakọta admixture na ike nkekọ nke ngwa agha

Enwere ike ịhụ ya site na mmetụta nke cellulose ether na starch ether na ike nrapado nke ngwa agha mgbe emechara usoro onunu ogwu ma gwakọta ya na ngwa agha. Mgbe usoro onunu ogwu nke cellulose ether bụ 0.2% ~ 0.6%, usoro nke starch ether bụ 0.03% ~ 0.07% %, mgbe a na-ejikọta ha abụọ n'ime ngwa agha ahụ, na-abawanye ụba nke ihe abụọ ahụ, ike nke njikọ. ngwa agha ga-eji nwayọọ nwayọọ na-ebu ụzọ na-amụba, ma mgbe ha rutere otu uru, na mmụba nke ọnụ ọgụgụ na-ejikọta ọnụ, ike nrapado nke ngwa agha ahụ ga-eji nwayọọ nwayọọ na-abawanye. Ike nkekọ ga-eji nwayọọ nwayọọ na-ebelata, mana ọ ka dị ukwuu karịa uru nke ike njigide ngwa agha benchmark. Mgbe ị na-ejikọta ya na 0.4% cellulose ether na 0.05% starch ether, ike njikọ nke ngwa agha ahụ ruru ihe kachasị elu, nke dị ihe dịka 1.5 ugboro dị elu karịa nke benchmark mortar. Otú ọ dị, mgbe ọnụọgụ ahụ gafere, ọ bụghị nanị na viscosity nke ngwa agha ahụ dị oke ibu, ihe owuwu ahụ siri ike, kamakwa ike njikọ nke ngwa agha na-ebelata.

3. Nkwubi okwu

(1) Ma cellulose ether na starch ether nwere ike ibelata nkwụsịtụ nke ngwa agha, na mmetụta ga-aka mma mgbe ejikọtara ha abụọ ọnụ n'otu ego.

⑵N'ihi na ngwaahịa etherification nwere arụmọrụ ikuku siri ike, mgbe ị gbakwunyere cellulose ether na starch ether, a ga-enwekwu gas n'ime ngwa agha ahụ, nke mere na mgbe agbakwunyere cellulose ether na starch ether, mmiri mmiri nke ngwa ngwa ga-apụta ìhè njupụta ga-adị. belatara nke ukwuu, nke ga-eduga na mbelata kwekọrọ na ike mkpakọ nke ngwa agha ahụ.

(3) Ọnụ ego nke cellulose ether na starch ether nwere ike imeziwanye ike njikọ nke ngwa agha, na mgbe ejiri ha abụọ mee ihe, mmetụta nke imeziwanye ike njikọ nke ngwa agha dị ịrịba ama. Mgbe ị na-ejikọta cellulose ether na starch ether, ọ dị mkpa iji hụ na ọnụ ọgụgụ nchịkọta kwesịrị ekwesị. Ọnụ ego buru ibu ọ bụghị naanị na-emebi ihe, kamakwa ọ na-ebelata ike njikọ nke ngwa agha ahụ.

(4) Cellulose ether na starch ether, dị ka a na-ejikarị ngwa agha admixtures, nwere ike ịgbanwe mkpa Njirimara nke ngwa agha, karịsịa na-emezi ngwa agha agbanwe agbanwe na bonding ike, na-enye ntụaka maka proportioning mmepụta nke akọrọ-agwakọta plastering ngwa agha admixtures.