| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an aggregate for filling material using coal ash.SOLUTION: There is provided an aggregate for a filling material manufactured by crushing and sintering a granule of a composition containing coal ash and water curable material and having the granule having a particle diameter of 5 mm to 25 mm of 75 mass% or more. The granule having the particle diameter of 5 mm to 25 mm has a circularity of 0.50 or more, preferably of 0.90. The composition is preferably the one containing a smectite clay mineral. Further the water curable material is preferably cement. The aggregate for the filling material contains AlOof 10 to 30 mass%, CaO of 1 to 20 mass% and FeOof 1 to 10 mass%.</p> |
