Mmetụta nke viscosity nke cellulose ether na Njirimara nke gypsum ngwa agha

Viscosity bụ akụkụ dị mkpa nke cellulose ether. N'ikwu okwu n'ozuzu, ka viscosity dị elu, ka mma na-ejigide mmiri nke gypsum mortar. Otú ọ dị, ka viscosity dị elu, otú ahụ ka ịdị arọ nke cellulose ether dị elu, na solubility nke cellulose ether na-ebelata ya. Nke dị elu nke viscosity bụ, otú ahụ ka ọ na-apụta ìhè na mmetụta na-eme ka ọ dị arọ, ma ọ bụghị nha. Ihe dị elu nke viscosity, otú ahụ ka ngwa ngwa mmiri ga-adịwanye mma, na-arụ ọrụ, na-arụ ọrụ nke ịrapara scraper na elu adhesion na mkpụrụ. Mana ọ naghị enye aka ịbawanye ike nhazi nke ngwa agha mmiri n'onwe ya. Tụkwasị na nke ahụ, n'oge a na-ewu ụlọ, arụmọrụ nke mgbochi mmiri mgbochi mmiri adịghị egosi. N'ụzọ dị iche, ụfọdụ Methyl cellulose gbanwetụrụ na viscosity dị obere ma ọ bụ nke na-adịchaghị mma gosipụtara mmụba n'ike nhazi nke ngwa agha mmiri. Ihe mgbidi ụlọ na-abụkarị ihe owuwu porous, ha nwere mmịnye mmiri. Na ihe eji arụ ọrụ gypsum a na-eji maka mgbidi mgbidi, mgbe agbakwunyere mmiri na-agbanwe agbanwe na mgbidi ahụ, mmiri dị mfe na-etinye ya na mgbidi ahụ, na-eme ka gypsum enweghị mmiri dị mkpa maka hydration, na-eme ka ihe isi ike na plasta na-ebelata ike nkekọ. , ya mere enwere mgbawa, drum oghere, spalling na nsogbu ndị ọzọ dị mma. Ịkwalite njide mmiri nke ihe owuwu ụlọ gypsum nwere ike dozie nsogbu nke ịdị mma ụlọ ma melite ike njikọ na mgbidi ahụ. Ya mere, onye na-eji mmiri na-edebe mmiri aghọwo otu n'ime ihe mgbakwunye dị mkpa nke ihe owuwu ụlọ gypsum.

Iji mee ka owuwu ahụ dị mfe, a na-eji ihe ndị a na-eme ntụ ntụ ụlọ dị ka nkedo, ihe nkedo na-egbuke egbuke, ihe nkedo na-ejikọta na plasta putty, a na-agbakwunye gypsum retarder na mmepụta ahụ iji mee ka oge na-ewu ihe nkedo nke plasta dị ogologo, n'ihi na usoro hydration nke hemihydrate. A na-egbochi gypsum site n'ịgbakwunye retarder na gypsum, ụdị gypsum dị otú ahụ kwesịrị ịdịgide na mgbidi maka awa 1-2 tupu ịtọ ntọala, na ọtụtụ n'ime mgbidi ahụ nwere ihe mgbapụta mmiri, karịsịa, ihe mgbidi ọhụrụ dị arọ dị ka mgbidi brik, Mgbidi aerated nke a na-ekpo ọkụ, ihe mkpuchi ikpo ọkụ nke perforated, ya mere, iji mee ọgwụgwọ na-ejigide mmiri nke gypsum slurry, iji zere ịnyefe ụfọdụ n'ime mmiri mmiri na mgbidi, na-eme ka gypsum mado na-esi ike mgbe ụkọ mmiri, hydration adịghị ezu. , na-akpata gypsum na mgbidi elu nkwonkwo ebe nkewa, shei. Ịgbakwunye ihe na-ejigide mmiri bụ idobe mmiri dị na pasta gypsum, iji hụ na mmeghachi omume hydration nke gypsum mado na interface, si otú ahụ na-eme ka njikọ dị ike. Ndị na-ejigide mmiri na-emekarị bụ cellulose ethers, dị ka Methyl cellulose (MC), hypromellose.HPMC, hydroxyethyl methyl cellulose (HEMC), wdg. Na mgbakwunye, mmanya polyvinyl, sodium alginate, starch gbanwetụrụ, diatomite na obere ntụ ntụ nwekwara ike iji mee ka njigide mmiri dị mma.