Application for Functional Construction Materials of Artificial Soil Manufactured Using Coal Bottom Ash

To recycle coal bottom ash(denoted here as CBA) generated from thermal power plants as a functional construction material, artificial soil(denoted as AS) containing CBA with dredged soil(denoted as DS) at a ratio(wt%) of 70 : 30 was manufactured by means of material engineering with sintering in a rotary kiln at 1125℃ using a green body formed via extrusion processing. The properties of the soil mechanics of the AS and the as-received CBA were analyzed and compared. Compaction testing results determined an optimum moisture content of the AS and CBA at 18%. During these tests, the maximum dry unit weights of the materials were similar, at 1.57 and 1.58 t/m 3 , respectively. The compressive strength levels of the AS and CBA concrete specimens were 5.1 and 5.4 t/m 2 , respectively, both of which increased after materials engineering processing. In a consolidation test, the compression index of the AS and CBA was found to be 0.114 ± 0.001 in both cases. The values were similar regardless of the materials engineering processes, but during the consolidation of AS, its coefficient was higher than that of the CBA materials.