| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete composition capable of increasing the strength of obtained concrete. SOLUTION: The concrete composition is composed of an aqueous solution containing a divalent-trivalent iron salt expressed by following formula: Fe<SP>+2</SP><SB>m</SB>Fe<SP>+3</SP><SB>n</SB>Cl<SB>2m+3n</SB>(wherein, m and n are each a positive integer) and one kind or more selected from magnesium chloride, calcium chloride, zinc chloride, magnesium sulfate, magnesium nitrate, calcium nitrate, and other metal salts in a concrete composition using cement. The concrete structure is strengthened by the synergistic effect of the divalent-trivalent iron salt expressed by the formula and the metal salts, and a highly strengthened concrete structure can be obtained. COPYRIGHT: (C)2004,JPO |
