Cellulose ether bụ ụdị ngwakọta polymer organic nke a na-ejikarị eme ihe n'ihe owuwu ụlọ, karịsịa na ihe ndị dabeere na ciment. Cellulose ether nwere ike igbu oge usoro hydration nke ciment, si otú ahụ na-edozi ọrụ, ịtọ oge na mmalite ike mmepe nke ciment mado.
(1). Mmeghachi omume hydration na-egbu oge
Cellulose ether nwere ike igbu oge mmeghachi omume hydration nke ciment, nke a na-enwetakarị site na usoro ndị a:
1.1 Mgbasa ozi na mmetụta mkpuchi
Ngwọta viscosity dị elu nke a na-emepụta site na igbari cellulose ether na ngwọta mmiri nwere ike ịmepụta ihe nkiri adsorption n'elu akụkụ ciment. Nhazi nke ihe nkiri a bụ n'ihi mgbasa nke anụ ahụ nke hydroxyl dị iche iche na cellulose ether molecules na ions n'elu cement cement, nke na-eme ka a na-ekpuchi elu nke ciment, na-ebelata kọntaktị n'etiti cement particles na mmiri mmiri, si otú ahụ. na-egbu oge mmeghachi omume hydration.
1.2 Nhazi ihe nkiri
N'oge mmalite nke hydration ciment, cellulose ether nwere ike ịmepụta nnukwu ihe nkiri n'elu akụkụ ciment. Ịdị adị nke ihe nkiri a na-egbochi mgbasa nke mmiri mmiri n'ime ime nke ciment, si otú a na-egbu oge hydration nke ciment. Tụkwasị na nke ahụ, nhazi nke ihe nkiri a nwekwara ike ibelata mgbasa na mgbasa nke calcium ion, na-egbu oge na-emepụta ngwaahịa hydration.
1.3 Mgbasa na ntọhapụ mmiri
Cellulose ether nwere ike ịmị mmiri, nwere ike ịmị mmiri ma hapụ ya nwayọ. Usoro ntọhapụ mmiri a nwere ike imeziwanye ihe na-arụ ọrụ nke cement slurry ruo n'ókè ụfọdụ, ma na-ebelata ọnụ ọgụgụ nke mmeghachi omume hydration site n'ibelata ntinye mmiri dị irè n'oge usoro hydration.
(2). Mmetụta nke ihe mejupụtara akụkụ ciment
Cellulose ethers nwere mmetụta dị iche iche na hydration nke akụkụ ciment dị iche iche. N'ozuzu, cellulose ether nwere mmetụta doro anya karị na hydration nke tricalcium silicate (C₃S). Ọnụnọ nke cellulose ether ga-egbu oge hydration nke C₃S ma belata ntọhapụ nke okpomọkụ hydration n'oge nke C₃, si otú ahụ na-egbu oge mmepe nke ike mbụ. Na mgbakwunye, cellulose ethers nwekwara ike imetụta hydration nke ihe ndị ọzọ ịnweta ịnweta dị ka dicalcium silicate (C₂S) na tricalcium aluminate (C₃A), ma mmetụta ndị a dị ntakịrị.
(3). Rheology na structural mmetụta
Cellulose ether nwere ike dịkwuo viscosity nke ciment slurry na-emetụta ya rheology. High viscosity slurry na-enyere aka belata edozi na stratification nke simenti ahụ, ikwe ka ciment slurry nọgide na-enwe ezi uniformity tupu ịtọ. Njirimara viscosity a dị elu ọ bụghị nanị na-egbu oge usoro hydration nke ciment, kamakwa ọ na-eme ka mmiri na-arụ ọrụ na-arụ ọrụ nke ciment slurry.
(4). Mmetụta ngwa na ịkpachapụ anya
Cellulose ethers nwere mmetụta dị ukwuu n'ịkwụsị hydration ciment ma ya mere a na-ejikarị eme ihe iji dozie oge nhazi na mmiri mmiri nke ihe ndị dabeere na ciment. Otú ọ dị, ọ dị mkpa ka a chịkwaa usoro ọgwụgwọ na ụdị cellulose ether nke ọma, n'ihi na ether cellulose gabigara ókè nwere ike ịkpata nsogbu dị ka ezughị oke mmalite oge na ịba ụba nke ihe ndị dabeere na ciment. Tụkwasị na nke ahụ, ụdị cellulose ethers dị iche iche (dị ka methylcellulose, hydroxypropylmethylcellulose, wdg) nwere usoro dị iche iche na mmetụta dị na ciment slurries, na ọ dị mkpa ka a họrọ dị ka kpọmkwem ngwa chọrọ.
Ngwa nke cellulose ether na ihe ndị dabeere na ciment nwere ike ọ bụghị nanị na-egbu oge mmeghachi omume hydration nke ciment, ma na-emeziwanye arụmọrụ ihe owuwu na ịdịte aka nke ihe. Site na nhọpụta ezi uche dị na ya na iji cellulose ethers, mma na arụ ọrụ nke ihe ndị dabeere na ciment nwere ike ime ka ọ dịkwuo mma.
Oge nzipu: Ọgọst-03-2024