Ụbọchị nbipute: 26, Disemba, 2022
1. Mgbakwụnye ihe na-ebelata mmiri
Mgbakwụnye mmiri na-ebelata mmiri bụ ngwaahịa kemịkalụ nke a gbakwunyere ya na kọnkịta nwere ike ịmepụta slump achọrọ na oke mmiri-ciment dị ala karịa nke a na-emebu ya. A na-eji admixtures na-ebelata mmiri iji nweta ike kọmpụta kpọmkwem site na iji ọdịnaya ciment dị ala. Ihe dị n'ime simenti dị ala na-ebute mpụta CO2 dị ala na ojiji ike kwa olu nke kọmpụta emepụtara. Site na ụdị admixture a, a na-emezi ihe ndị dị na ya ma nyere aka tinye ihe n'okpuru ọnọdụ siri ike. A na-eji ndị na-ebelata mmiri eme ihe n'ụzọ bụ isi n'ọdụ ụgbọ mmiri, ihe mkpuchi ihe na-adịghị ala ala, na ihe mgbochi. Ọganihu na-adịbeghị anya na teknụzụ admixture emela ka e nwee mmepe nke ndị na-ebelata mmiri n'etiti.
2. Concrete Admixtures: Superplasticizers
Ebumnuche bụ isi nke iji superplasticizers bụ imepụta kọmpụta na-asọpụta nke nwere mkpọda dị elu nke dị ihe dị ka sentimita asaa ruo itoolu ka a ga-eji mee ya n'ụlọ arụsiri ike nke ukwuu yana n'ebe a na-enweghị ike nweta nkwado zuru oke site na ịma jijiji. Ngwa ọzọ bụ isi bụ imepụta ihe dị elu na w / c sitere na 0.3 ruo 0.4. Achọpụtala na maka ọtụtụ ụdị simenti, superplasticizer na-eme ka ọrụ nke kọmpụta dịkwuo mma. Otu nsogbu jikọtara ya na iji ihe na-ebelata mmiri dị elu na kọmpụta bụ mfu mkpọda. Enwere ike iji ihe na-arụ ọrụ dị elu nke nwere superplasticizer nwere nguzogide ntu oyi dị elu, mana ọdịnaya ikuku ga-abawanyerịrị n'ihe gbasara kọmpụta na-enweghị superplasticizer.
3. Concrete Admixtures: Set-Retarding
Set retarding concrete admixtures na-eji egbu oge mmeghachi omume kemịkalụ na-ewere ọnọdụ mgbe ihe na-amalite ntọala usoro. Ụdị admixtures ndị a na-ejikarị eme ihe iji belata mmetụta nke okpomọkụ dị elu nke nwere ike ịmepụta ntọala mmalite nke ngwa ngwa. Set retarding admixtures na-eji n'ime ihe owuwu pavement, na-enye ohere ọzọ oge maka agwụcha ihe pavement, mbenata ndị ọzọ na-eri na-etinye a ọhụrụ ihe ogbe osisi na-arụ ọrụ na saịtị na-enyere aka iwepụ oyi nkwonkwo na konkret. A pụkwara iji ndị na-azụ azụ mee ihe iji guzogide mgbawa n'ihi ngbanwe nke nwere ike ime mgbe a na-etinye slabs kwụ ọtọ na ngalaba. Ọtụtụ ndị na-azụ azụ na-arụkwa ọrụ dị ka ndị na-ebelata mmiri ma nwee ike itinye ikuku ụfọdụ n'ime kọmpụta
4. Concrete Admixtures: Air-Entraining Agent
Ikuku entraining ihe nwere ike ime ka ifriizi-thaw anwụ ngwa ngwa nke ihe. Ụdị admixture a na-emepụta ihe na-arụ ọrụ nke ọma karịa ihe na-adịghị etinye aka ma na-ebelata ọbara ọgbụgba na ikewapụ ihe ọhụrụ. Emelitere nguzogide nke ihe na-eme ntu oyi siri ike ma ọ bụ okirikiri ifriizi/ mebie. Uru ndị ọzọ sitere na ngwakọta a bụ:
a. Nnukwu iguzogide cycles nke wetting na ihicha
b. Ogo dị elu nke ịrụ ọrụ
c. Ogo dị elu nke ịdịte aka
Afụ ikuku agbakwunyere na-arụ ọrụ dị ka ihe nchekwa anụ ahụ megide mgbawa nke nrụgide na-akpata n'ihi mmụba nke mmiri na okpomọkụ na-ekpo ọkụ. Ikuku ụtọ admixtures bụ dakọtara na ihe fọrọ nke nta niile ihe admixtures. Dịka maka otu pasenti nke ikuku etinyegoro, ike mkpakọ ga-ebelata ihe dịka pasentị ise.
5. Concrete Admixtures: Accelerating
A na-agbakwunye ihe ndị na-ebelata ihe ndị na-ebelata ihe na-eme ka ihe dị n'ime ya n'oge ngwakọta mbụ. Ụdị admixture a nwere ike ibelata n'oge na ogologo oge ihicha shrinkage. Enwere ike iji mbelata admixtures mee ihe n'ọnọdụ ebe mgbawa mgbawa nwere ike ibute nsogbu ịdịte aka ma ọ bụ ebe ọnụ ọgụgụ dị ukwuu nke nkwonkwo shrinkage na-adịghị mma maka ebumnuche akụ na ụba ma ọ bụ teknụzụ. Mbelata na-ebelata admixtures nwere ike, n'ọnọdụ ụfọdụ, ibelata mmepe ike ma n'oge mmalite na mgbe emechara.
6.Concrete Admixtures: Mbelata Mbelata
A na-agbakwunye ihe ndị na-ebelata ihe ndị na-ebelata ihe na-eme ka ihe dị n'ime ya n'oge ngwakọta mbụ. Ụdị admixture a nwere ike ibelata n'oge na ogologo oge ihicha shrinkage. Enwere ike iji mbelata admixtures mee ihe n'ọnọdụ ebe mgbawa mgbawa nwere ike ibute nsogbu ịdịte aka ma ọ bụ ebe ọnụ ọgụgụ dị ukwuu nke nkwonkwo shrinkage na-adịghị mma maka ebumnuche akụ na ụba ma ọ bụ teknụzụ. Mbelata na-ebelata admixtures nwere ike, n'ọnọdụ ụfọdụ, ibelata mmepe ike ma n'oge mmalite na mgbe emechara.
7. Ihe Mgbakwụnye ihe: Mgbochi na-egbochi
Ihe mgbochi corrosion na-egbochi admixtures na-adaba n'ụdị admixture ọpụrụiche ma na-eji nwayọ corrosion nke nchara na-agbasi ike na kọmpat. Ndị na-egbochi corrosion nwere ike belata ọnụ ahịa nrụzi nke ihe owuwu agbakwunyere n'oge ndụ ọrụ nke afọ 30-40. Mgbakwụnye ọpụrụiche ndị ọzọ gụnyere mgbakwunye mbelata mbelata na ihe mgbochi alkali-silica reactivity. Mgbakwụnye na-egbochi mmebi na-enwe mmetụta dị nta na ike n'afọ ndị ọzọ mana ọ nwere ike mee ka mmepe ike mmalite dịkwuo ngwa. Calcium nitrite dabeere corrosion inhibitors na-eme ka oge nhazi nke ihe nrụpụta ngwa ngwa n'ọtụtụ ọnọdụ ọgwụgwọ ọ gwụla ma ejiri nkwụghachi azụ nke edobere ha iji mebie mmetụta na-eme ngwa ngwa.
Oge nzipu: Dec-27-2022
