Cellulose etherga-agbatị oge ntọala ciment mado ma ọ bụ ngwa agha net, na-egbu oge na ciment hydration kinetics, nke bara uru na-emeziwanye ọrụ oge nke ciment isi ihe, melite agbanwe agbanwe na ihe slump mgbe ọnwụ, ma nwekwara ike igbu oge na-ewu ọganihu, karịsịa na ala okpomọkụ ọnọdụ ọnọdụ maka ojiji nke ngwa agha na ihe.
N'ozuzu, ka ọdịnaya nke cellulose ether dị elu, ka oge nhazi nke ciment slurry na ngwa agha na-adị ogologo karị, na-apụta ìhè karị na hydration na-egbu oge. Cellulose ether nwere ike igbu oge hydration nke ihe kacha mkpa clinker ịnweta tricalcium aluminate (C3A) na tricalcium silicate (C3S) na ciment, ma mmetụta ha hydration kinetics abụghị otu. Cellulose ether na-ebelata mmeghachi omume mmeghachi omume nke C3S na usoro osooso, ebe maka usoro C3A-Caso4, ọ na-agbatịkwu oge ntinye.
Nnwale ndị ọzọ gosiri na cellulose ether nwere ike igbochi mgbasa nke C3A na C3S, na-egbu oge crystallization nke hydrated calcium aluminate na calcium hydroxide, ma belata nucleation na uto nke CSH n'elu C3S particles, ma nwere obere mmetụta na ettringite kristal. Weyer et al. chọpụtara na ogo nke nnọchi DS bụ isi ihe na-emetụta hydration ciment, na obere DS bụ, ka a na-apụtawanye ìhè na mmiri ciment na-egbu oge bụ. Na usoro nke cellulose ether igbu oge ciment hydration.
Sliva et al. kwenyere na cellulose ether mụbara viscosity nke ngwọta pore ma gbochie ọnụ ọgụgụ nke ion ije, si otú a na-egbu oge ciment hydration. Agbanyeghị, Pourchez et al. chọpụtara na mmekọrịta dị n'etiti cellulose ether egbu oge ciment hydration na ciment slurry viscosity abụghị ihe doro anya. Schmitz et al. chọpụtara na viscosity nke cellulose ether fọrọ nke nta ka ọ ghara inwe mmetụta na hydration kinetics nke ciment.
Pourchez chọpụtakwara na cellulose ether kwụsiri ike n'okpuru ọnọdụ alkaline na hydration ciment ya na-egbu oge enweghị ike ịsị na ire ere.cellulose ether. Adsorption nwere ike ịbụ ezigbo ihe kpatara cellulose ether na-egbu oge ciment hydration, ọtụtụ ihe mgbakwunye organic ga-adaba na akụkụ ciment na ngwaahịa hydration, na-egbochi mgbasa nke cement particles na crystallization nke hydration ngwaahịa, si otú na-egbu oge hydration na condensation nke ciment. Pourchcz et al. chọpụtara na ka ike mgbasa ozi nke ngwaahịa hydration na cellulose ether na-esiwanye ike, otú ahụ ka ọ na-apụta ìhè karị.
A na-ekwenyekarị na cellulose ether molecules na-agbasasị na ngwaahịa hydration na-adịkarịghị etinye ya na usoro ịnweta nke clinker mbụ.
Oge nzipu: Eprel-28-2024