Ụbọchị nbipute:11,Dec,2023
CellulosesA na-ejiwanye ihe ndị sitere na ciment, karịsịa na ngwa agha akọrọ, n'ihi njide mmiri dị mma na mmetụta ha na-eme ka ọ dị elu. Ya mere, Njirimara na guzobe usoro nkecellulose ether gbanwetụrụ ihe dabere na ciment na mmekọrịta dị n'etiticellulose ether na ciment slurry ejirila nwayọọ nwayọọ bụrụ ihe a na-elekwasị anya na ngalaba nke ihe owuwu ụlọ na injinịa n'afọ ndị na-adịbeghị anya. Enweela ọtụtụ nsonaazụ nyocha. Ijikọta ọganihu nyocha n'ụlọ na mba ọzọ, a ka nwere nsogbu ndị a na nyocha na ngwa nkecellulose ether ihe dabere na ciment gbanwechara:
1.E nwere ọtụtụ ụdịcelluloses.Ọbụnacelluloses A na-ekewa ihe ndị e ji simenti mee ihe n'ụdị dị iche iche dị ka HEC, HEMC na HPMC n'ihi ogo ngbanwe ha. Otu ụdị nkecellulosesnwere ọtụtụ ihe dị iche na nhazi nke molekụla, ịdị arọ molekụla, ogo nke nnọchi ma ọ bụ ọdịnaya nọchiri anya ya. Ka ọ dị ugbu a, ọtụtụ nyocha n'ụlọ na ná mba ọzọ na-elekwasị anya na otu ma ọ bụ ọtụtụcelluloses.Nhọrọ nkecellulose ether bụ naanị na mpaghara ngwa nke ha. The molekụla Ọdịdị e ji maracelluloses egosighi ya, na nnọchite anya ha abụghịkwa nnọchite anya. Nkwubi okwu bụ ihe a na-apụghị izere ezere nke "ngbanwe akụkụ", na enwere esemokwu na esemokwu n'etiti nsonaazụ ule. Ya mere, ọ dị mkpa ka ị na-amụ usoro nhazi nhazi na ihe nhazi na usoro nke ụdị dị iche ichecellulose ether ihe gelling gbanwetụrụ.
2.Akụkụ dị adị amụwo mmetụta nkecelluloses na dị iche iche Njirimara nke cimentious ihe, na-eduzi a ụfọdụ analysis nke guzobe usoro, ma okpu iji chọpụta mmekọrịta dị n'etiti molekul Ọdịdị nkecelluloses na njirimara nke ciment slurry gbanwetụrụ. mgbe nile, na e nwere ihe dị iche iche doro anya na usoro ha. N'imecellulose ether-medified simenti dabeere ihe, e nwere ole na ole ọmụmụ banyere ihe dị iche iche molekụla Ọdịdị, nke na-apụghị n'ezie ịkọwa usoro e guzobere dị iche iche Njirimara nke.cellulose ether-megharia ihe dabere na ciment. . Ọ bụ ezie na ụfọdụ akwụkwọ chọpụtara nacelluloses na ihe dị iche iche molekụla nwere mmetụta dị iche iche na hydration nke ciment, ihe ndị na-akpata ya ka akọwapụtabeghị.
3. Usoro nke mmetụta nkecellulose ether na ciment hydration kinetics ka a ga-amụkwu. Ugbu a, gbasara usoro hydration na-egbu oge nkecellulose ether, ọ bụ ezie na a na-ewere adsorption dị ka ezigbo ihe kpatara hydration na-egbu oge nkecellulose ether, achọpụtara na ike adsorption siri ike n'etiti ngwaahịa hydration nacellulose ether, hydration nke ciment na-egbu oge karị. Usoro mgbasa ozi n'etiticelluloses na ngwaahịa hydration ciment, yana ihe kpatara ike adsorption dị iche iche nke dị iche ichecelluloses na ngwaahịa hydration ciment, amụbeghị ọzọ.
4. Akwụkwọ dị adị na-egosi nacelluloses nwere ike imetụta n'ụzọ dị ukwuu nhazi pore nke ihe ndị sitere na ciment.Celluloses ekwenyere na ọ na-arụ ọrụ elu ma na-enwe mmetụta ikuku na-eme ka ciment slurries ọhụrụ, si otú ahụ na-amụba porosity nke ciment siri ike. Otú ọ dị, mmetụta nkecelluloses na mgbe nile na nguzobe usoro nke ciment slurry pore size nkesa na-adịkarịghị atụle.
5. Rheological Njirimara bụ akụkụ dị mkpa nke ngwa nkecelluloses na ihe ndị sitere na ciment. N'ụzọ dị mwute, e nwere ole na ole ọmụmụ na rheological Njirimara nkecellulose ether gbanwetụrụ ciment slurry n'ụlọ na ná mba ọzọ.
Oge nzipu: Dec-11-2023
