Cellulose ethers na mgbidi putty

Cellulose ether (hydroxypropyl methylcellulose, HPMC maka nkenke) bụ admixture na-emekarị maka iwu mgbidi ime mgbidi ma na-arụ ọrụ dị mkpa na putty. HPMC nwere viscosities dị iche iche nwere mmetụta dị ukwuu na arụmọrụ nke putty. Akwụkwọ a n'usoro na-amụ mmetụta na iwu nke viscosities dị iche iche nke HPMC na usoro ọgwụgwọ ya na arụmọrụ nke putty, na-ekpebi viscosity kacha mma na usoro onunu ogwu nke HPMC na putty.

Isi okwu: cellulose ether, viscosity, putty, arụmọrụ

0.Okwu mmalite

Site na mmepe nke ọha mmadụ, ndị mmadụ na-achọsi ike ibi na gburugburu ime ụlọ dị mma. N'ime usoro ihe ịchọ mma, ọ dị mkpa ka a kpochapụ nnukwu akụkụ nke mgbidi ma tinye ya na putty iji mejupụta oghere. Putty bụ ihe dị mkpa na-akwado ihe ịchọ mma. Ọgwụgwọ putty na-adịghị mma ga-akpata nsogbu dị ka mgbawa na ikpochapụ ihe mkpuchi agba. Iji ihe mkpofu ụlọ ọrụ na mineral ndị nwere ihe na-eme ka ikuku dị ọcha iji mụọ ihe ọhụrụ nchekwa gburugburu ebe obibi putty aghọwo isiokwu na-ekpo ọkụ. Hydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, English abbreviation bụ HPMC) bụ a mmiri-soluble polymer material p, dị ka a na-ejikarị admixture maka owuwu putty, ọ nwere ezigbo njigide mmiri na-arụ ọrụ, na-agbatị oge na-arụ ọrụ ma na-emeziwanye ihe owuwu , Mma ọrụ arụmọrụ. . Dabere na nyocha nnwale gara aga, akwụkwọ a kwadebere ụdị ime mgbidi nchekwa gburugburu ebe obibi putty na diatomite dị ka isi ihe na-arụ ọrụ, wee mụọ usoro nyocha nke viscosity dị iche iche HPMC na ọnụọgụ putty na nguzogide mmiri nke putty, ike njikọta, mbido mbụ. ihicha mgbape mgbochi, egweri Mmetụta nke workability, workability na elu akọrọ oge.

1. Akụkụ nnwale

1.1 Nwalee akụrụngwa na ngwa

1.1.1 Akụrụngwa

Ihe 4 W-HPMC, 10 W-HPMC, na 20 W-HPMC cellulose ether na polyvinyl mmanya roba ntụ ntụ ejiri mee nyocha bụ Kima Chemical Co., Ltd; Ụlọ ọrụ Jilin Diatomite nyere diatomite; nnukwu calcium na talcum ntụ ntụ nyere Shenyang SF Industrial Group; Ụlọ ọrụ Yatai Cement nyere ciment 32.5 R ọcha Portland.

1.1.2 Ngwa nyocha

Onye na-enyocha mmiri cement NLD-3; mbụ ihicha mgbochi mgbawa tester BGD 597; onye nleba anya nkekọ nwere ọgụgụ isi HC-6000 C; Ịgwakọta na sanding na-agbasasị igwe ọtụtụ ebumnuche BGD 750.

1.2 Usoro nnwale

Usoro bụ isi nke ule ahụ, ya bụ, ọdịnaya nke ciment, calcium dị arọ, diatomite, talcum ntụ ntụ na mmanya polyvinyl bụ 40%, 20%, 30%, 6% na 4% nke ngụkọta nke ntụ ntụ putty, n'otu n'otu. . Usoro ọgwụgwọ HPMC nwere viscosities atọ dị iche iche bụ 1‰, 2‰, 3‰, 4‰na 5‰n'otu n'otu. Maka ịdị mma nke ntụnyere, a na-achịkwa ọkpụrụkpụ nke ihe owuwu putty single-pass na 2 mm, a na-achịkwa ogo mgbasawanye na 170 mm ruo 180 mm. Ihe nrịbama nchọta bụ mgbape mgbape mbụ ihicha, ike nkekọ, mmiri na-eguzogide mmiri, ihe na-agba aja, arụ ọrụ na oge ọkọchị.

2. Nsonaazụ ule na mkparịta ụka

2.1 Mmetụta nke viscosities dị iche iche nke HPMC na usoro ọgwụgwọ ya na ike njikọ nke putty

Site ule pụta na nkekọ ike akụkụ nke dị iche iche viscosities nke HPMC na ọdịnaya ya na putty's nkekọ ike, ọ pụrụ ịhụ na putty's ike nkekọ na-abawanye na mbụ wee na-ebelata site na mmụba nke ọdịnaya HPMC. Ike nkekọ nke putty nwere mmetụta kachasị ukwuu, nke na-abawanye site na 0.39 MPa mgbe ọdịnaya dị 1‰ruo 0.48 MPa mgbe ọdịnaya bụ 3‰. Nke a bụ n'ihi na mgbe HPMC na-agbasasị n'ime mmiri, cellulose ether na mmiri zaa ngwa ngwa na fuses na roba ntụ ntụ, interlaced na ibe ya, na ciment hydration ngwaahịa na-na gburugburu a polymer film na-etolite a mejupụtara matrix na-adọ, nke na-eme ka a mejupụtara matrix na-adọ. njikọ putty Ike na-abawanye, ma mgbe ọnụọgụ HPMC buru ibu ma ọ bụ viscosity dị oke elu ma ọ bụ dị ala, ihe nkiri polymer nke e guzobere n'etiti HPMC na cement particles nwere mmetụta mkpuchi, nke na-ebelata ike njikọ nke putty.

2.2 Mmetụta nke viscosities dị iche iche nke HPMC na ọdịnaya ya na oge ọkọchị nke putty

Enwere ike ịhụ ya site na nsonaazụ ule nke viscosities dị iche iche nke HPMC na usoro ọgwụgwọ ya n'elu oge ihicha nke putty na oge na-ekpo ọkụ. Ka viscosity nke HPMC na-abawanye ma na-abawanye usoro onunu ogwu, ogologo oge ikpochapu elu nke putty. /T298-2010), elu akọrọ oge nke ime mgbidi putty agaghị agafe 120 min, na mgbe ọdịnaya nke 10 W-HPMC gafere 4‰, na ọdịnaya nke 20 W-HPMC gafere 3‰, elu akọrọ oge nke putty karịrị nkọwapụta chọrọ. Nke a bụ n'ihi na HPMC nwere mmetụta njide mmiri dị mma. Mgbe a na-agwakọta HPMC n'ime putty, ụmụ irighiri mmiri na otu hydrophilic dị na usoro molekụla nke HPMC nwere ike jikọta ibe ha iwebata obere afụ. Afụ ndị a nwere mmetụta "rola", nke bara uru na batching putty Mgbe etinyere putty siri ike, ụfọdụ ikuku ikuku ka na-adị na-emepụta oghere ndị nwere onwe ha, nke na-egbochi mmiri ka ọ ghara ikpochapụ ngwa ngwa ma na-agbatị oge ihicha elu nke putty. Na mgbe a na-agwakọta HPMC n'ime putty, ngwaahịa hydration dị ka calcium hydroxide na CSH gel na ciment na-ejikọta ya na ụmụ irighiri ihe HPMC, nke na-eme ka viscosity nke ngwọta pore dịkwuo elu, na-ebelata mmegharị nke ion na ngwọta pore, na n'ihu igbu oge. usoro hydration ciment.

2.3 Mmetụta nke viscosities dị iche iche nke HPMC na usoro ọgwụgwọ ya na ihe ndị ọzọ nke putty

Enwere ike ịhụ ya site na nsonaazụ ule nke mmetụta nke viscosities dị iche iche nke HPMC na ọnụ ọgụgụ nke putty na ihe ndị ọzọ nke putty. The mgbakwunye nke HPMC dị iche iche viscosities na-eme ka mbụ ihicha mgbape eguzogide, mmiri na-eguzogide na sanding arụmọrụ nke putty niile nkịtị, ma na-abawanye nke ego nke HPMC , ogbenye ewu arụmọrụ. N'ihi mmetụta siri ike nke HPMC, nnukwu ọdịnaya ga-eme ka nkwekọ nke putty dịkwuo elu, nke ga-eme ka ọ sie ike ikpochapụ putty ma mebie arụmọrụ ụlọ.

3. Nkwubi okwu

(1) Ike nchikota nke putty na-abawanye na mbu wee belata site na mmụba nke ọdịnaya HPMC, na ike imekọ ihe ọnụ nke putty na-emetụtakarị mgbe ọdịnaya nke 10 W-HPMC bụ 3.‰.

(2) The ukwuu viscosity nke HPMC na ndị ọzọ ọdịnaya, ogologo n'elu ihicha oge nke putty. Mgbe ọdịnaya nke 10 W-HPMC karịrị 4‰, na ọdịnaya nke 20 W-HPMC karịrị 3‰, oge ikpochapu elu nke putty dị ogologo ma ghara irute ọkọlọtọ. Chọrọ.

(3) Ịgbakwunye viscosities dị iche iche nke HPMC na-eme ka nkwụsị mgbape mbụ ihicha, mmiri na-eguzogide na sanding arụmọrụ nke putty nkịtị, ma na-abawanye nke ọdịnaya, na-ewu arụmọrụ na-aghọ njọ. N'ịtụle n'ụzọ zuru ezu, arụmọrụ nke putty jikọtara ya na 3‰10 W-HPMC kacha mma.