CEMENT COMPOSITION USING WASTE CONCRETE FINE POWDER AND METHOD OF PREPARING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a cement composition having certain self hardenability in hydration by pulverizing waste concrete in which carbonation is progressed into fine powder having a prescribed particle diameter and further applying a prescribed treatment to the fine powder.

SOLUTION: The cement composition having a certain self hardenability in hydration is prepared by heating fine powder obtained with regenerated aggregate by pulverizing concrete waste of which the carbonation is ensured and which is produced by the demolition of a reinforced concrete structure or the like at 300-500°C and dehydrating so that highly hydrated silica gel in the fine powder is made low hydrous or anhydrous.

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