Cement admixture manufactring method thereof cement having the cement admixture and concrete having the cement admixture

摘要

The present invention cement admixture, and that as the manufacturing method and the concrete containing the cement and the cement admixture containing the above cement admixture, the process for producing the cement admixture according to the invention, calcium (CaO), calcium sulfate oxide (CaSO ₄₎ and secondary dry desulfurization gypsum comprising the steps of first mixing and stirring the waste water or fresh water containing calcium carbonate (CaCO _3), silicon dioxide (SiO _2), the dry desulfurization gypsum and waste water containing calcium carbonate (CaCO ₃₎ Mixing and stirring the mixture to prepare a mixed powder, molding the mixed powder, aging the mixed powder, and drying the mixed powder.