1. Fly ash and slag air brick has many advantages such as low cost, light mass, high strength, low coefficient of heat conduction, and resist frozen.

2. Grit, fly ash, cinder residue, active carbon, air brick detritus were used as filtering media according to proper proportion for low concentration domestic sewage treatment.

3. The invention belongs to the technical field of building materials and in particular relates to an air brick prepared by utilizing industrial waste dreg.

4. Discusess that seizing a golden opportunity no produced and used solid chamotte , making use of the refuse resources, produces new construction material such as refuse air brick, etc.

5. The invention belongs to the technical field of building materials and in particular relates to a porous air brick prepared by utilizing industrial waste dreg.

6. Solid brick made of clay may destroy vegetation and occupy infield, further more the strength and heat preservation capability of it is not as good as air brick.