The solid waste as fly ash,
coal gangue, and mining slag can be used as the main raw
materials in producing bricks and blocks due to the technological
development nowadays. These raw materials are easily attainable
and now can be recycled and added new value by comprehensive
utilization. Hence, the new wall materials are more environment-friendly
and economic-beneficial. For various practical uses, bricks
and blocks are made from different combinations of raw
materials.