Industrial units which generate heat as an industrial by-product may sell otherwise waste heat to the network rather than release it into the environment.

Compared to industrial by-product pozzolans they are characterized by larger ranges in composition and a larger variability in physical properties.

Some examples of industrial waste are chemical solvents, paints, sand paper, paper products, industrial by-products, metals, and radioactive wastes.

Excavations uncovered and mixed industrial by-products and wastes accumulated over 130 years.