N'ime ngwa simenti na slurry dabeere na gypsum, hydroxypropyl methylcellulose na-arụkarị ọrụ nke njide mmiri na ịgbatị, ma nwee ike imeziwanye nrapado na sag nke slurry.
Ihe ndị dị ka okpomọkụ ikuku, okpomọkụ na ọsọ ọsọ ikuku ga-emetụta ọnụ ọgụgụ mmiri na-agbanwe agbanwe na ciment mortar na ngwaahịa gypsum. Ya mere, na oge dị iche iche, e nwere ụfọdụ ọdịiche dị na mmiri na-ejide mmiri nke ngwaahịa na otu ego nke hydroxypropyl methylcellulose agbakwunyere. N'ime ihe owuwu a kapịrị ọnụ, enwere ike gbanwee mmetụta njide mmiri nke slurry site na ịba ụba ma ọ bụ ibelata ego nke HPMC agbakwunyere. Njide mmiri n'okpuru ọnọdụ okpomọkụ dị elu bụ ihe dị mkpa na-egosi ọdịiche dị mma nke hydroxypropyl methylcellulose ether.
Ngwaahịa usoro hydroxypropyl methylcellulose dị mma nwere ike dozie nsogbu nke njigide mmiri n'okpuru oke okpomọkụ. N'oge okpomọkụ dị elu, karịsịa n'ebe ndị na-ekpo ọkụ ma na-ekpo ọkụ na ebe a na-emepụta ihe na-egbuke egbuke n'akụkụ anwụ na-acha, a chọrọ HPMC dị elu iji meziwanye njide mmiri nke slurry. HPMC dị elu nwere otu ezigbo mma. A na-ekesa methoxy na hydroxypropoxy otu ya n'otu n'otu n'akụkụ eriri molekụla cellulose, nke nwere ike melite ikike ikuku oxygen na hydroxyl na ether bond iji jikọọ na mmiri iji mepụta njikọ hydrogen. , nke mere na mmiri n'efu na-aghọ mmiri a na-ekekọta, ka o wee nwee ike ịchịkwa evaporation nke mmiri na-akpata site na ihu igwe dị elu, ma nweta nnukwu njigide mmiri.
High-edu hydroxypropyl methylcellulose nwere ike uniformly na n'ụzọ dị irè chụsasịrị na ciment ngwa agha na gypsum dabeere na ngwaahịa, na kechie niile siri ike ahụ, na-etolite a wetting film, na mmiri na isi na-eji nwayọọ nwayọọ tọhapụrụ ogologo oge , na mmeghachi omume hydration na ihe gelling inorganic iji hụ na ike njikọ na ike mkpakọ nke ihe.
Ya mere, n'ime ụlọ okpomọkụ nke okpomọkụ dị elu, iji nweta mmetụta njigide mmiri, ọ dị mkpa ịgbakwunye ngwaahịa HPMC dị elu na oke zuru ezu dịka usoro ahụ si dị, ma ọ bụghị ya, a ga-enwe hydration na-ezughị ezu, ike belata, mgbawa, oghere. na mwụfu kpatara oke ihicha. nsogbu, ma na-abawanye ihe isi ike nke ndị ọrụ. Ka okpomọkụ na-adaba, ọnụ ọgụgụ nke HPMC agbakwunyere nwere ike jiri nwayọọ nwayọọ belata, enwere ike nweta otu mmetụta njide mmiri.
Oge nzipu: Eprel-13-2023