Sources of recycled aggregates for concrete production

There is a need for the implementation of sustainability principles in the construction industry. One of the ways this can be achieved is to drastically reduce the exploitation of natural resources and maximize the recycling of both construction and industrials wastes to be employed in the manufacture of concrete. In recent times, natural aggregates have been replaced by recycled waste aggregates to produce concrete, and since concrete is made up of about 70% of aggregates, the properties of the aggregates determine the properties of the concrete. Hence, it is important to obtain adequate knowledge of the sources of the recycled aggregates employed in the production of concrete. This chapter attempts to describe various sources of recycled aggregates and carry out a comprehensive review of the viability of the recycled aggregates explored in the previous research works as main components of concrete and presents various results emerging from the investigations that have been carried out on each source and type of recycled aggregates.