CONSTRUCTION MATERIAL COMPOSITION AND METHOD FOR REDUCING AMOUNT OF FLUORINE ELUTION IN THE SAME

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PROBLEM TO BE SOLVED : To enable effective use of wastes and such as raw materials and provide a construction material composition having excellent performance as construction materials including aggregate for mortar and concrete, roadbed materials, banking materials and backfill materials. SOLUTION : The construction material composition comprises : a component (A), a fired product A that comprises 10 to 100 pts.mass of 2CaO-Al2O3-SiO2 and 20 pts.mass or less of 3CaO-Al2O3 relative to 100 pts.mass of 2CaO-SiO2, with 0.03 to 0.2 pt.mass of fluorine contained in 100 mass% of the fired product; and a component (B), a magnesium-containing insolubilization material containing a powder comprising a magnesium-based material. A mineral containing magnesium carbonate as a main component is fired at 650 to 1, 000°C to obtain a fired product B containing magnesium oxide and magnesium carbonate. The fired product B is hydrated so as to be partially magnesium hydroxide to form the magnesium-based material. The ignition loss of the magnesium-based material at 1, 000°C is 6 to 30 mass%. COPYRIGHT : (C)2014, JPO&INPIT