Cellulose ethers bụ ụdị ogige polymer organic emebere site na cellulose eke. A na-ejikarị ha eme ihe n'ihe owuwu ụlọ, karịsịa na ihe ndị dabeere na ciment. Mmetụta nke cellulose ether na usoro hydration ciment bụ nke a na-egosipụta na akụkụ ndị a: mgbasa nke cement particles, mmiri na-ejide mmiri, mmetụta siri ike, na mmetụta na morphology na ike mmepe nke ciment hydration ngwaahịa.
1. Okwu mmalite nke ciment hydration
Usoro hydration nke ciment bụ usoro mgbagwoju anya nke anụ ahụ na kemịkal dị n'etiti ciment na mmiri. Mmeghachi omume ndị a na-eme ka tapawa ciment jiri nwayọọ nwayọọ na-esiwanye ike iji mepụta usoro siri ike, na-emecha na-emepụta ngwaahịa hydration dị ka calcium silicate hydrate (CSH) na calcium hydroxide (CH). N'oge usoro a, mmeghachi omume hydration nke simenti, mmiri na njigide mmiri nke slurry, na ịmepụta ngwaahịa hydration na-emetụta ike na ogologo oge nke ihe ikpeazụ.
2. Usoro ọrụ nke cellulose ethers
Cellulose ether na-arụ ọrụ dị mkpa na-ahụ maka nhazi anụ ahụ na kemịkalụ na usoro hydration ciment. Cellulose ether na-emetụta usoro hydration nke ciment n'ụzọ abụọ: otu bụ site na-emetụta nkesa na evaporation nke mmiri na ciment slurry; nke ọzọ bụ site na-emetụta mgbasa na coagulation nke simenti irighiri.
Njikwa mmiri na njigide mmiri
Cellulose ethers nwere ike imeziwanye njide mmiri nke ihe ndị sitere na ciment. N'ihi hydrophilicity siri ike ya, cellulose ether nwere ike ịmepụta ngwọta colloidal kwụsiri ike na mmiri, nke nwere ike ịmịkọrọ ma jide mmiri. Ikike njide mmiri a dị mkpa n'ibelata mgbawa nke mmiri na-efu ngwa ngwa na kọmpụta n'oge mmalite hydration. Karịsịa na ebe akọrọ ma ọ bụ ọnọdụ ihe owuwu dị elu, cellulose ether nwere ike igbochi mmiri ịpụ ngwa ngwa ma hụ na ọnụ ọgụgụ mmiri dị na ciment slurry zuru ezu iji kwado mmeghachi omume hydration nkịtị.
Rheology na ịdị arọ
Cellulose ethers nwekwara ike melite rheology nke ciment slurries. Mgbe agbakwunyere cellulose ether, nkwụsi ike nke ciment slurry ga-abawanye nke ukwuu. A na-ekwukarị na ihe a na-eme bụ usoro ogologo yinye nke cellulose ether molecules kpụrụ n'ime mmiri. Ngwakọta a nke nwere ogologo yinye nwere ike igbochi mmegharị nke irighiri ciment, si otú ahụ na-abawanye viscosity na nkwụsi ike nke slurry. Ngwongwo a dị mkpa karịsịa na ngwa ndị dị ka plasta na tile adhesives, n'ihi na ọ na-egbochi ngwa ngwa ciment ka ọ na-agba ọsọ ngwa ngwa ma na-enye arụmọrụ ka mma.
Belata mmiri mmiri na-egbu oge ma dozie oge nhazi oge
Cellulose ether nwere ike igbu oge mmeghachi omume hydration nke ciment ma mee ka ntọala mbụ na oge nhazi ikpeazụ nke ciment slurry. Mmetụta a na-eme n'ihi na ụmụ irighiri ihe nke cellulose ether na-adaba n'elu akụkụ ciment, na-eme ihe mgbochi na-egbochi njikọ kpọmkwem n'etiti mmiri na ciment, si otú ahụ na-ebelata mmeghachi omume hydration. Site na igbu oge ịtọ oge, cellulose ethers nwere ike imeziwanye arụmọrụ ihe owuwu, na-enye ndị ọrụ ihe owuwu oge ka ha mee mgbanwe na mmezi.
3. Mmetụta n'ụdị ngwaahịa hydration ciment
Ọnụnọ nke ethers cellulose na-emetụtakwa microstructure nke ngwaahịa hydration ciment. Nnyocha e mere egosiwo na ọdịdị nke calcium silicate hydrate (CSH) gel ga-agbanwe mgbe agbakwunyere cellulose ether. Mkpụrụ ndụ cellulose ether nwere ike imetụta usoro kristal nke CSH, na-eme ka ọ dịkwuo mfe. Usoro a rụrụ arụ nwere ike ibelata ike mmalite ruo n'ókè ụfọdụ, mana ọ na-enye aka melite ike nke ihe ahụ.
Cellulose ethers nwekwara ike ibelata nhazi ettringite n'oge usoro hydration. Ebe ọ bụ na cellulose ether na-eweghachite ọnụ ọgụgụ nke mmeghachi omume hydration, a na-ebelata ọnụọgụ ettringite na ciment, si otú a na-ebelata nrụgide dị n'ime ya site na mgbasawanye olu n'oge usoro ọgwụgwọ.
4. Mmetụta na mmepe ike
Cellulose ethers nwekwara mmetụta dị ukwuu na mmepe ike nke ihe ndị dabeere na ciment. N'ihi na ethers cellulose na-ebelata ọnụ ọgụgụ hydration nke ciment, mmalite ike mmalite nke tapawa ciment na-adịkarị nwayọọ. Otú ọ dị, ka mmeghachi omume hydration na-aga n'ihu, mmetụta nchịkwa nke cellulose ether mmiri na-ejigide mmiri na hydration ngwaahịa morphology nwere ike jiri nwayọọ nwayọọ pụta, nke ga-enyere aka mee ka ike dịkwuo elu n'ikpeazụ.
Ekwesiri iburu n'uche na ego agbakwunyere na ụdị cellulose ether nwere mmetụta abụọ na ike. Ọnụ ego ether nke cellulose kwesịrị ekwesị nwere ike imeziwanye arụmọrụ ihe owuwu ma na-abawanye ike mgbe e mesịrị, ma ịṅụbiga mmanya ókè nwere ike ime ka ibelata ike mmalite nke ihe ndị dabeere na ciment ma na-emetụta ihe nrụpụta ikpeazụ. Ya mere, na ngwa bara uru, ụdị na usoro onunu ogwu nke cellulose ether kwesịrị ka emeziwanye ya na imepụta ya dị ka ihe achọrọ maka injinịa.
Cellulose ether na-emetụta usoro hydration na ihe onwunwe nke ciment site n'ịkwalite njigide mmiri nke ihe ndị dabeere na ciment, na-edozi ọnụego hydration, na-emetụta ụdị ngwaahịa hydration. Ọ bụ ezie na ethers cellulose nwere ike ime ka ike gwụ nke mbụ, ha nwere ike imeziwanye ịdịte aka na ịdị ike nke ihe n'ime ogologo oge. Mgbakwunye nke cellulose ether nwekwara ike imeziwanye arụmọrụ ihe owuwu, karịsịa na ngwa ngwa na-achọ ogologo oge ọrụ na nnukwu mmiri chọrọ. Ọ nwere uru na-enweghị atụ. N'ime ngwa injinia n'ezie, nhọrọ ezi uche dị na ya nke ụdị na usoro onunu ogwu nke cellulose ether nwere ike ime ka ike, ịrụ ọrụ ihe owuwu na ịdịte aka chọrọ ihe.
Oge nzipu: Sep-27-2024