| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for efficiently suppressing consolidation of a slag civil engineering material, especially a method for effectively using a particle-size regulated slag and a crusher-run steel slag as a steel slag for roads. Ž<P>SOLUTION: One or two slags selected from a blast furnace slag and a steelmaking slag are immersed in free water containing carbonic acid to form an insoluble mineral facies on the slag surface. Specifically, a blast furnace slow cooling slag of ≤25 mm in particle size is subjected to an aging treatment so that the free CaO content in a sample slag obtained from a treated slag by a predetermined means becomes ≤0.45 mass% (for a blast furnace slow cooling slag), and ≤4.5 mass% (for a converter slag), and thereafter is immersed to be subjected to a carbonation treatment in a carbonic acid-containing free water (pH is 3.5 to 5.4) so that the carbonation ratio of a sample slag obtained from the treated slag by a predetermined means becomes ≥15%. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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