Fly ash is the solid waste ejected from the coal burning electric power plant. Abandoned fly ash not only occupies a large amount of earth, but also flying with the stone, which has pollution to the air.

1. The Limitations While recycling has improved over the past few decades in terms of material functionality, there remain a few limitations. First, while the gradation control of recycled materials compares favorably to the gradation quality of virgin materials, abrasion does tend to be different. Additionally, there have been prior instances of contaminants found in…