Nchikota nke ceramic nke sitere na ciment bụ ugbu a bụ ngwa kachasị ukwuu nke ngwa ngwa agwakọta akọrọ pụrụ iche, nke bụ ụdị ciment dị ka isi simenti ma gbakwunye ya site na gradation nke mkpokọta, onye na-ejigide mmiri, onye na-ahụ maka ike mmalite, ntụ ntụ latex na organic ndị ọzọ ma ọ bụ inorganic. admixtures.Na-eji naanị na mmiri ịgwakọta, jiri ya tụnyere nkịtị ciment ngwa agha, nwere ike dị ukwuu mma bonding ike n'etiti finishing ihe na isi ihe, nwere ezi mgbochi ileghara na nwere magburu onwe mmiri na-eguzogide, okpomọkụ na-eguzogide na kefriza-thawing okirikiri uru, tumadi eji. n'ihi na pasting ụlọ ime na mpụta mgbidi taịl nile, ala tile na ndị ọzọ na-achọ mma ihe, A na-eji ọtụtụ ebe na mma nke mgbidi, ala, ime ụlọ ịwụ, kichin na ụlọ ndị ọzọ.Ọ bụ ihe jikọrọ taịlị seramiiki nke a na-ejikarị eme ihe.
Na-emekarị mgbe anyị na-ekpe ikpe na arụmọrụ nke a seramiiki tile nrapado, na mgbakwunye na ịṅa ntị na ya arụmọrụ arụmọrụ, mgbochi-sliding ikike, ma na-aṅa ntị na ya n'ibu ike na-emeghe oge.Cellulose ether na seramiiki tile nrapado na mgbakwunye na-emetụta rheological Njirimara nke poselin gluu, dị ka ezigbo ọrụ arụmọrụ, stick mma ọnọdụ, kamakwa na n'ibu Njirimara nke seramiiki tile nrapado nwere mmetụta siri ike.
1. Mepeeoge
Mgbe roba ntụ ntụ na cellulose ether na-adị na mmiri mmiri mmiri, ụfọdụ data ụdị na-egosi na roba ntụ ntụ nwere ike kinetic ike na-arapara n'ahụ simenti hydration ngwaahịa, na cellulose ether adị ọzọ na oghere mmiri mmiri, nke na-emetụta viscosity na ịtọ oge nke ngwa agha. Ọzọ.Esemokwu dị n'elu nke cellulose ether dị ukwuu karịa nke ntụ ntụ rọba, na ịba ụba nke ether cellulose ọzọ na ngwa ngwa ngwa bara uru maka ịmepụta njikọ nke hydrogen n'etiti ọdụ ụgbọ elu na cellulose ether.
Mmiri evaporation si na mmiri mmiri ngwa agha, ngwa agha, cellulose ether na elu imeju, 5 nkeji nwere ike na-etolite a akpụkpọ anụ n'elu nke ngwa agha, ga-ebelata evaporation ọnụego nke nsochi, na ọzọ mmiri si slurry oké akụkụ nke. ịkwaga na ngwa agha oyi akwa bụ thinner, na-emeghe isi obere etisasịwo mgbe mbụ e guzobere akpụkpọ ahụ, Mbugharị nke mmiri nwere ike iweta ọzọ enrichment nke cellulose ether na ngwa agha n'elu.
Ihe nkiri a na-emepụta cellulose ether n'elu ngwa ngwa nwere mmetụta dị ukwuu na njirimara nke ngwa agha:
Nke mbụ, ihe nkiri a kpụrụ dị oke mkpa, a ga-agbaze ugboro abụọ, na-enweghị ike igbochi evaporation nke mmiri, belata ike.
Abụọ, nhazi nke ihe nkiri ahụ dị oke oke, cellulose ether na oghere ngwa ngwa mmiri ịta ahụhụ dị elu, viscosity, mgbe taịlị seramiiki adịghị mfe imebi n'elu ihe nkiri ahụ.
Enwere ike ịhụ na ihe nkiri na-emepụta ihe nkiri cellulose ether nwere mmetụta dị ukwuu na oge mmeghe.Ụdị cellulose ether (HPMC, HEMC, MC, wdg) na ogo nke etherification (ogo nke nnọchi) na-emetụta kpọmkwem ihe nkiri na-emepụta ọrụ cellulose ether, na ike na ike nke ihe nkiri ahụ.
2, ịbịaru ike
Cellulose ether ọ bụghị naanị na-enye ngwa agha ihe niile bara uru dị n'elu, kamakwa ọ na-egbu oge hydration kinetics nke ciment.Mmetụta a na-eweghachi azụ bụ n'ihi mgbasa nke cellulose ether molecules na usoro ịnweta dị iche iche na simenti na-agba mmiri, ma a na-ekwenyekarị na cellulose ether molecules na-etinyekarị na ngwaahịa hydration dị ka CSH na calcium hydroxide, na-adịkarịghị adsorbed. mbụ ịnweta adọ nke clinker.Na mgbakwunye, cellulose ether na-ebelata ion (Ca2+, SO42-, ...) n'ihi ụbara viscosity nke ngwọta pore.Arụmọrụ na ngwọta pore, nke na-ebelata usoro hydration ọzọ.
Viscosity bụ ihe ọzọ dị mkpa dị mkpa, nke na-anọchite anya chemical Njirimara nke cellulose ether.Dịka e kwuru n'elu, viscosity na-emetụtakarị ikike ijide mmiri, ma nwee mmetụta dị ukwuu na arụ ọrụ nke ngwa agha ọhụrụ.Otú ọ dị, nchọpụta nnwale ahụ chọpụtara na viscosity nke cellulose ether fọrọ nke nta ka ọ ghara inwe mmetụta na hydration kinetics nke ciment.Ibu molekụla enwechaghị mmetụta na hydration, na nnukwu ọdịiche dị n'etiti ịdị arọ molekụla dị iche iche bụ naanị 10min.Ya mere, ịdị arọ molekụla abụghị isi ihe iji chịkwaa hydration ciment.
"Cellulose ether na ciment dabeere akọrọ ngwakọta ngwa agha ngwaahịa na ngwa" kwuru n'ụzọ doro anya na cellulose ether igbu oge na-adabere na ya chemical Ọdịdị.Ihe na-emekarị bụ na maka MHEC, ọkwa dị elu nke methylation dị elu, obere mmetụta nkwụsị nke cellulose ether.Na mgbakwunye, nnọchi hydrophilic (dị ka nnọchi nke HEC) nwere mmetụta azụ azụ siri ike karịa nnọchi hydrophobic (dịka nnọchi nke MH, MHEC na MHPC).Mmetụta azụ azụ nke cellulose ether na-emetụta tumadi site na akụkụ abụọ nke ụdị na ọnụ ọgụgụ nke ndị nọchiri anya.
Nnwale usoro ihe omume anyị chọpụtakwara na ọdịnaya nke ihe ngbanwe na-arụ ọrụ dị mkpa n'ike igwe nke nrapado seramiiki.Anyị tụlere arụmọrụ nke HPMC na ọkwa dị iche iche nke nnọchi na nrapado seramiiki, wee nwalee mmetụta nke cellulose ether nwere otu dị iche iche n'okpuru ọnọdụ ọgwụgwọ dị iche iche na akụrụngwa nke nrapado seramiiki.Mmetụta nke ọdịnaya DS na MS na ike ịbịaru nke nrapado tile seramiiki n'ime ụlọ okpomọkụ.
HPMC bụ ether mejupụtara, ya mere iji tinye ọnụ ọgụgụ abụọ ahụ ọnụ, maka HPMC, ọ dị mkpa ka ọ bụrụ ọkwa nke ọkọnọ, iji hụ na mmiri na-edozi ya na nnyefe ya, anyị maara na ọdịnaya nke ihe ndị ọzọ na-ekpebi gel okpomọkụ nke HPMC. , nke bụ iji chọpụta ojiji nke HPMC gburugburu ebe obibi, N'ụzọ dị otú a, otu ọdịnaya nke HPMC na-enịmde ke nso.Na nso nso a, otu esi ejikọta methoxy na hydroxypropoxy iji nweta mmetụta kachasị mma bụ ọdịnaya nke ọmụmụ anyị.N'ebe ụfọdụ, mmụba nke ọdịnaya methoxy ga-eduga n'ọdịdị ala nke ịbịaru ike, ebe mmụba nke ọdịnaya hydroxypropoxy ga-eduga n'ịdị elu nke ịbịaru ike.Enwere mmetụta yiri nke ahụ na oge oghe.
Oge nzipu: Dec-20-2021