Izinto zokuqalisa nokhubazekelela i-hydration ze-konkriti yimikhakha yekemikali enilungiswe ukuguqula ibango lokukhubeka kwe-Portland cement, ikupela kulawula ngokufinyelele isikhathi sokuxumeka kwekonkriti nokuthuthuka kwamandla asaqala. Izinto zokuqalisa yimikhakha—ngokuphakamiso iqukethe i-calcium chloride, i-sodium nitrate, noma ezikhethile zengakukhlowayidi—eziphangisa i-hydration ye-cement ukunciphisa isikhathi sokuxumeka esiqala nenquma, okuvumela ukuthuthuka kwamandla okushesha. Izinto zokukhubazekela, ezilungiwe kusukela ku-tartaric acid derivatives, lignosulfonates, noma i-hydroxy carboxylic acids, zandisa isikhathi sokusebenza zindluze i-hydration, zigcina i-konkriti ihlanganiseke ngesikhathi sokulula okuthe xolo. Lemikhakha yenguquko yasekelayo kumfundela wokwakhela owobulungiselelo, lapho izimo zomhlaba, izingkubane zokuthomba, nomsebenzi wokwakhela kuvamile ukudinga i-konkriti ekhona noma elibi ngaphandle kwebango elo yokuthomba.
Izinto zokuqalisa nokhubazekelela i-hydration ze-konkriti yimikhakha yekemikali enilungiswe ukuguqula ibango lokukhubeka kwe-Portland cement, ikupela kulawula ngokufinyelele isikhathi sokuxumeka kwekonkriti nokuthuthuka kwamandla asaqala. Izinto zokuqalisa yimikhakha—ngokuphakamiso iqukethe i-calcium chloride, i-sodium nitrate, noma ezikhethile zengakukhlowayidi—eziphangisa i-hydration ye-cement ukunciphisa isikhathi sokuxumeka esiqala nenquma, okuvumela ukuthuthuka kwamandla okushesha. Izinto zokukhubazekela, ezilungiwe kusukela ku-tartaric acid derivatives, lignosulfonates, noma i-hydroxy carboxylic acids, zandisa isikhathi sokusebenza zindluze i-hydration, zigcina i-konkriti ihlanganiseke ngesikhathi sokulula okuthe xolo. Lemikhakha yenguquko yasekelayo kumfundela wokwakhela owobulungiselelo, lapho izimo zomhlaba, izingkubane zokuthomba, nomsebenzi wokwakhela kuvamile ukudinga i-konkriti ekhona noma elibi ngaphandle kwebango elo yokuthomba.
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