| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing limestone fine aggregate for concrete, which allows effective reduction of bleeding of concrete after casting. Ž<P>SOLUTION: The manufacturing method (A) includes: a crushing step ST1; a grinding and granulating step ST2; a separation step ST3 of limestone sand and turbid water, where limestone sand 100 is separated by a classifying machine (B); a fine particle selection step ST4 of selecting a separated fine particle fraction 10; and a fine particle mixing step ST5 of mixing turbid water 21 of a first fine particle fraction with the limestone sand 100. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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