Nkọwa:
Ụlọ ọrụ ihe owuwu na-ekere òkè dị ukwuu n'ịkpụzi ụwa nke oge a, nke simenti bụ isi ihe na-ewu ụlọ. Ruo ọtụtụ afọ, ndị na-eme nchọpụta na ndị injinia anọgidewo na-achọ ụzọ isi meziwanye àgwà na ịrụ ọrụ nke ciment. Otu ụzọ na-ekwe nkwa gụnyere mgbakwunye nke ihe mgbakwunye, nke calcium formate aghọwo onye a ma ama nke ọma.
ewebata:
Cement bụ akụkụ dị oke mkpa nke ihe owuwu ma na-achọ nkwalite na-aga n'ihu iji gboo mkpa mgbanwe nke ụlọ ọrụ ahụ. Mgbakwunye nke ihe mgbakwunye egosila na ọ bụ atụmatụ dị irè maka imezi akụkụ dị iche iche nke ciment. Calcium formate, ngwakọta nke mmeghachi omume nke calcium oxide na formic acid na-emepụta, dọtara uche maka ikike ọ nwere imeziwanye njirimara nke ciment. Isiokwu a na-achọ ịkọwapụta ụzọ nke usoro calcium si emetụta àgwà ciment na ịrụ ọrụ nke ọma.
Njirimara chemical nke calcium formate:
Tupu ibanye n'ime mmetụta calcium formate na ciment, ọ dị mkpa ịghọta kemịkalụ nke mgbakwunye a. Calcium formate bụ kristal ọcha ntụ ntụ nwere usoro kemịkal Ca (HCOO)2. Ọ bụ mmiri-soluble ma nwee hygroscopic Njirimara. Ngwakọta pụrụ iche nke calcium na ion formate na-enye ihe ndị dị na ya kpọmkwem, na-eme ka ọ dị mma maka ngwa dị iche iche, gụnyere nkwalite ciment.
Usoro:
Ntinye nke calcium formate n'ime ngwakọta ciment na-ewebata ọtụtụ usoro na-enye aka mee ka arụmọrụ dịkwuo mma. Otu isi usoro gụnyere hydration ciment ngwa ngwa. Calcium formate na-arụ ọrụ dị ka ihe na-akpali akpali, na-akwalite nhazi nke hydrates dị ka calcium silicate hydrate (CSH) na ettringite. Osooso a na-ebute oge nhazi ngwa ngwa yana mmụba mmepe ike mmalite.
Ọzọkwa, calcium formate na-arụ ọrụ dị ka ebe nucleation maka mmiri ozuzo hydrate, na-emetụta microstructure nke matriks ciment. Mgbanwe a na-ebute oke nkesa hydrate na-edochaghị anya, na-enyere aka melite ịdịte aka na ibelata permeability.
Ọzọkwa, calcium formate na-ekere òkè na mmeghachi omume pozzolanic, ebe ọ na-emeghachi omume na calcium hydroxide iji mepụta gel CSH ọzọ. Mmeghachi omume a abụghị nanị na-enye aka na mmepe ike kamakwa ọ na-ebelata ihe ize ndụ nke ịmepụta ettringite na-egbu oge (DEF), ihe omume nke nwere ike imebi ogologo oge nke ciment.
Mmelite ogo ciment:
Mmepe Ike mmalite:
Ikike nke calcium formate iji mee ngwangwa ciment hydration na-atụgharị gaa na mmụba dị ịrịba ama na mmepe ike mmalite. Nke a dị oke mkpa maka ọrụ owuwu ebe enwere ike inweta ike ngwa ngwa. Oge nhazi ngwa ngwa nke calcium formate kwalitere nwere ike ibute mwepụ ngwa ngwa na ọganihu ihe owuwu ngwa ngwa.
Inte aka emelitere:
A na-agbakwunye calcium formate iji gbanwee microstructure ciment, na-eme ka ihe na-adịgide adịgide. Mmụba njupụta na otu nkesa hydrates na-enye aka na-abawanye nguzogide kemịkalụ, cycles-thaw, na eyi. Ya mere, nhazi nke ciment a na-emeso ya na calcium formate na-egosipụta ogologo ndụ ọrụ.
Belata permeability:
Otu n'ime isi ihe na-emetụta ịdịte aka nke ihe bụ permeability ya. Calcium formate na-ebelata permeability site na-emetụta pore nhazi nke matriks ciment. Nhazi nke matriks siri ike nke nwere pores dị mma na-egbochi ntinye mmiri na ihe ike ike, si otú ahụ na-eme ka ihe ahụ na-eguzogide emebi.
Mbelata mmeghachi omume Alkali Silica (ASR):
Nnyocha achọpụtala na calcium formate nwere ike ibelata ihe ize ndụ nke mmeghachi omume alkali-silica, usoro na-emerụ ahụ nke nwere ike ime ka ọzịza gel guzobe na mgbawa na ihe. Site n'imetụta ihe owuwu pore na kemịkalụ nke ciment slurry, calcium formate na-enyere aka belata ohere nke mmebi metụtara ASR.
Nkwalite arụmọrụ:
Nrụ ọrụ emelitere:
Mmetụta nke calcium formate na ciment hydration nwere mmetụta dị mma na arụ ọrụ nke ihe ọhụrụ. Oge nhazi ngwa ngwa yana kinetics hydration emelitere na-enyere aka melite njirimara mgbaba, na-eme ka ntinye na mkpịkọ ọnụ nke kọnkịta. Nke a bara uru karịsịa ebe ịdị mfe nke ntinye dị oke mkpa.
njikwa okpomọkụ:
Iji calcium formate na ciment na-enyere aka ibelata mmetụta nke oke okpomọkụ n'oge usoro ọgwụgwọ. Ịme ngwa ngwa nhazi oge na-ebute calcium formate nwere ike ime ka mmepe ike dị ngwa ma belata adịghị ike nke ihe na nsogbu ndị metụtara okpomọkụ dị ka mgbawa ọkụ.
Atụmatụ nkwado:
Calcium formate nwere akụrụngwa na-emezu ebumnuche nkwado nke ụlọ ọrụ ihe owuwu. Mmeghachi omume pozzolanic ya na-eme ka ojiji nke ihe mkpofu na-eme ihe, yana mmetụta ya na ịdịte aka na ogologo ndụ na-enye aka na mbelata mkpokọta mmetụta gburugburu ebe obibi jikọtara ya na iji dochie na imezi ihe owuwu ịka nká.
Ihe ịma aka na echiche:
Ọ bụ ezie na uru dị n'itinye calcium formate n'ime ciment doro anya, a ghaghị ịtụle ihe ịma aka na njedebe ndị nwere ike. Ndị a nwere ike ịgụnye ọnụ ahịa abawanyela, enwere ike ịmekọrịta ya na ngwakọta ndị ọzọ, yana mkpa iji nlezianya na-achịkwa usoro ọgwụgwọ iji zere mmetụta ọjọọ. Na mgbakwunye, ịrụ ọrụ ogologo oge na ịdịte aka nke ihe a na-agwọ calcium formate n'okpuru ọnọdụ gburugburu ebe obibi kpọmkwem na-enye ohere nyocha ọzọ na ọmụmụ ihe ubi.
na ngwụcha:
Ịtinye calcium formate n'ime ciment bụ ụzọ na-ekwe nkwa iji melite ogo na ịrụ ọrụ nke ihe owuwu a dị mkpa. Site na usoro ihe omume ya dị iche iche, calcium formate na-eme ka hydration dịkwuo elu, na-eme ka microstructure dịkwuo mma ma na-enye aka n'ọtụtụ ihe ndị a na-achọsi ike, gụnyere mmepe ike mmalite, ọganihu na-adịgide adịgide na mbelata permeability. Ka ụlọ ọrụ ihe owuwu na-aga n'ihu na-etolite, ọrụ nke mgbakwunye dị ka calcium formate n'ịkwalite njirimara ciment nwere ike ịdịwanye mkpa. Nnyocha ndị ọzọ na ngwa bara uru ga-eme ka ọ pụta ìhè n'ụzọ zuru oke na iji calcium formate mee ihe n'ụdị ciment, na-emepe ụzọ maka nhazi ndị ọzọ na-agbanwe agbanwe na nke na-adịgide adịgide.
Oge nzipu: Dec-05-2023