This material is considered to have great potential for recycling (Van Gerven et al., 2007). In Taiwan the TEPA has reported that from a total of 2.15 million tons of bottom ash, 29% is recycled as coarse aggregate base, 5% as foundation and road fill, 28% as raw materials for the manufacture of controlled low strength materials, 27% as aggregate for non-reinforced concrete, 1% as asphalt concrete aggregate, 2% as brick aggregate and 8% as coarse aggregate for filling pipeline trenches