Which industrial waste is commonly used in construction industry?

Industrial waste is a by-product waste produced by industry which includes any material that is rendered useless during a manufacturing process from plants, mills, and mines.

Some examples of industrial waste are silica fume, slag, sludge, fly ash, sandpaper, metals, glass.

Fly ash:

• It is an industrial waste generated from thermal power plants.
• It is commonly used in the construction industry.
• The fly ash has a wider application in the production of the cement.
• Nowadays all the industries are adding the fly ash 25% in the production of the cement.

Copper slag

Copper slag has high toughness so it can be used to partially replacing the fine aggregate to obtain the durability and the strength. The standard mix ratio has been used for the mortars.

Sludge:

• It refers to the residual material left from industrial wastewater or sewage treatment processes.
• The paper industry that uses recycled paper as raw materials has as by-product paper sludge, which has a high content of calcium carbonate, organic materials, and other minerals.
• Because of its pozzolanic activity, paper sludge can be used as cementitious materials in building industry.