Final answer:
Flyash from pollution control devices is primarily used in the concrete industry and as a base for road construction. It benefits concrete by improving its properties and provides a stable foundation in road building.
Step-by-step explanation:
Flyash is a byproduct of combustion, typically from coal-burning in power plants, and can pose environmental challenges. However, when captured by pollution control devices, flyash can be beneficially reused in different industries. One such application is in the concrete industry, where flyash is used as a supplementary material for concrete production, enhancing certain properties of concrete such as durability and workability. Moreover, flyash finds application as a base for road construction, where it stabilizes the soil and provides a solid foundation for the roads. Additionally, it can be used for the fabrication of cement blocks and sometimes in large-scale land reclamation projects, such as filling abandoned mines or shaping land for airports, landfills, and golf courses.