N'ime afọ ndị na-adịbeghị anya, na-eji nwayọọ nwayọọ na mmejuputa iwu ndị dị mkpa nke na-agbaso echiche mmepe sayensị na iwulite ọha mmadụ na-echekwa akụ, ngwa agha nke obodo m na-eche ihu mgbanwe site na ngwa agha ọdịnala gaa na ngwa agha akọrọ akọrọ, na-ewu ụlọ akọrọ. ụlọ ọrụ ngwa agha abanyela na mmepe ngwa ngwa. nzọ nke.
Dị ka admixture kasị mkpa na-ewu akọrọ-agwakọta ngwa agha ngwaahịa, cellulose ether na-ekere òkè dị mkpa na arụmọrụ na-eri nke akọrọ-agwakọta ngwa agha. E nwere ụdị abụọ nke cellulose ethers: otu bụ ionic, dị ka sodium carboxymethyl cellulose (CMC), na nke ọzọ bụ na-abụghị ionic, dị ka methyl cellulose (MC), hydroxyethyl cellulose (HEC), Hydroxypropyl cellulose (HPMC), wdg. .
Ka ọ dị ugbu a, ọtụtụ n'ime ngwaahịa ether cellulose zuru ụwa ọnụ na-eji ihe owuwu ihe. Na ngwa ngwa mmepe nke akọrọ-agwakọta ngwa agha ụlọ ọrụ, m mba cellulose ether emewo isi nweta localization, na ọnọdụ nke mba ọzọ ngwaahịa na-achịkwa ahịa na-agbajikwa. N'ịbụ ndị na-arịwanye elu nke ngwa ngwa ngwa ngwa akọrọ akọrọ, mba m ga-aghọ onye na-emepụta ngwa ngwa nke akọrọ akọrọ, ntinye nke cellulose ether ga-abawanye ụba, ndị na-emepụta ya na ụdị ngwaahịa ga-abawanye. Nrụpụta ngwaahịa nke cellulose ether na ngwa ngwa agwakọta akọrọ aghọwo ihe na-elekwasị anya nke ndị na-emepụta na ndị ọrụ.
Ihe kachasị mkpa nke cellulose ether bụ njigide mmiri ya na ihe owuwu ụlọ. Na-enweghị mgbakwunye nke cellulose ether, akwa oyi akwa nke ngwa ngwa ọhụrụ na-akpọnwụ ngwa ngwa nke na simenti enweghị ike ime ka mmiri dị n'ụzọ nkịtị na ngwa agha ahụ enweghị ike isi ike ma nweta ezigbo njikọ. N'otu oge ahụ, mgbakwunye nke cellulose ether na-eme ka ngwa agha ahụ nwee ezigbo plasticity na mgbanwe, na-eme ka ike njikọ nke ngwa agha dịkwuo mma. Ka anyị kwuo banyere mmetụta na ntinye nke ngwa ngwa akọrọ akọrọ site na arụmọrụ ngwaahịa nke cellulose ether.
1. Ịdị mma nke cellulose
Ịdị mma nke cellulose ether na-emetụta solubility ya. Dịka ọmụmaatụ, na-ebelata ịdị mma nke cellulose ether, ngwa ngwa ọ na-agbaze n'ime mmiri na mmelite nke ọrụ njigide mmiri. Ya mere, ịdị mma nke cellulose ether kwesịrị ịgụnye dịka otu n'ime ihe nyocha ya. N'ikwu okwu n'ozuzu, ihe fọdụrụnụ nke cellulose ether fineness n'elu 0.212mm ekwesịghị ịbụ ihe karịrị 8.0%.
2. ihicha oke ọnwụ
Ọnụ ọgụgụ ọnwụ nke ihicha na-ezo aka na pasent nke oke nke ihe furu efu na nnukwu ihe nlele mbụ mgbe ether cellulose akpọnwụwo n'otu okpomọkụ. Maka ụfọdụ àgwà cellulose ether, ọnụ ọgụgụ ọnwụ nke ihicha dị oke elu, nke ga-ebelata ọdịnaya nke ihe ndị na-arụ ọrụ na cellulose ether, na-emetụta mmetụta ngwa nke ụlọ ọrụ ndị dị n'okpuru ala, ma nwekwuo ọnụ ahịa ịzụta. Ọtụtụ mgbe, ọnwụ dị arọ na ihicha cellulose ether adịghị karịa 6.0%.
3. Sulfate ash ọdịnaya nke cellulose ether
Maka ụfọdụ àgwà cellulose ether, ọdịnaya ash dị oke elu, nke ga-ebelata ọdịnaya nke ihe ndị na-arụ ọrụ na cellulose ether ma na-emetụta mmetụta ngwa nke ụlọ ọrụ dị n'okpuru ala. Ọdịnaya sulfate ash nke cellulose ether bụ ihe dị mkpa maka ịrụ ọrụ nke ya. Ejikọtara ya na ọkwa mmepụta nke ugbu a nke ndị na-emepụta cellulose ether nke obodo m, na-abụkarị ọdịnaya ash nke MC, HPMC, HEMC ekwesịghị gafere 2.5%, na ntụ ntụ nke HEC cellulose ether ekwesịghị gafere 10.0%.
4. Viscosity nke cellulose ether
Njide mmiri na mmetụta mbelata nke cellulose ether na-adabere na viscosity na usoro onunu ogwu nke cellulose ether n'onwe ya agbakwunyere na ciment slurry.
5. Uru pH nke cellulose ether
Viscosity nke ngwaahịa ether cellulose ga-eji nwayọọ nwayọọ belata mgbe echekwara ya na okpomọkụ dị elu ma ọ bụ ogologo oge, karịsịa maka ngwaahịa viscosity dị elu, ya mere ọ dị mkpa iji belata pH. N'ozuzu, ọ bụ ihe amamihe dị na ya ijikwa pH nso nke cellulose ether ruo 5-9.
6. Ntugharị ọkụ nke cellulose ether
Mgbasa ọkụ nke cellulose ether na-emetụta ozugbo mmetụta ngwa ya na ihe owuwu ụlọ. Isi ihe na-emetụta nnyefe ọkụ nke cellulose ether bụ: (1) àgwà nke akụrụngwa; (2) mmetụta nke alkalization; (3) nhazi usoro; (4) ihe mgbaze; (5) mmetụta neutralization.
Dị ka mmetụta eji eme ihe, nnyefe ọkụ nke cellulose ether ekwesịghị ịbụ ihe na-erughị 80%.
7. Gel okpomọkụ nke cellulose ether
A na-ejikarị cellulose ether eme ihe dị ka viscosifier, plasticizer na onye na-ejide mmiri na ngwaahịa ciment, ya mere viscosity na gel okpomọkụ bụ ihe dị mkpa iji mara àgwà cellulose ether. A na-eji okpomọkụ gel mee ihe iji chọpụta ụdị cellulose ether, nke metụtara ogo nke nnọchi nke ethers cellulose ndị ọzọ. Na mgbakwunye, nnu na adịghị ọcha nwekwara ike imetụta okpomọkụ gel. Mgbe okpomọkụ nke ngwọta na-ebili, polymer cellulose ji nwayọọ nwayọọ na-efunahụ mmiri, na viscosity nke ngwọta na-ebelata. Mgbe oghere gel ruru, polymer na-ekpochapụ kpamkpam wee mepụta gel. Ya mere, na ngwaahịa ciment, a na-achịkwa okpomọkụ n'okpuru mbụ gel okpomọkụ. N'okpuru ọnọdụ a, na-ebelata okpomọkụ, na-eme ka viscosity dị elu ma na-apụta ìhè karịa mmetụta nke ịkwa akwa na njide mmiri.
Oge nzipu: Feb-10-2023