| 摘要 |
PROBLEM TO BE SOLVED: To create a living environment excellent for aquatic animals and plants while using concrete excellent in strength, durability, workability, a construction cost and the like. SOLUTION: During flood control work in rivers and lakes and marshes, a matter manufactured by using gradually cooling slag on at least a part of fine aggregate as concrete molding making a part or the whole of a concrete structure installed on the floor face of a water area or a shore or a matter manufactured by using the gradually cooling slag on at least a part of rough aggregate is used.
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