Application of Aggregates from Construction and Demolition Wastes in Concrete: Review

Abstract

In the current century, urbanization and the development of the construction industry have led to the generation of construction and demolition waste (CDW), imposing pressure on ecology and the environment. This has attracted the attention of industry personnel and researchers. This work discusses the current research on recycled coarse or fine aggregate, mainly focusing on the physical, mechanical and durability properties of sustainable concrete with recycled coarse or fine aggregate. Furthermore, it also summarizes CDW recycling and classification in major countries, the production processes of recycled aggregate, and the physical properties. This review will provide a reference for the application of concrete with recycled coarse or fine aggregate. Moreover, this review notes that replacing natural aggregates with both coarse and fine recycled aggregates awaits further experimental exploration.

Experimental Study of Mechanical Properties and Theoretical Models for Recycled Fine and Coarse Aggregate Concrete with Steel Fibers

“…However, it is not as big as better, so determining the optimal dosage for achieving the desired shrinkage reduction is quite important [ 9 ]. The addition of a small quantity of expansive agent can effectively minimize the shrinkage of recycled coarse aggregate concrete [ 10 , 11 ], making it comparable to ordinary concrete with 50% recycled content. Water-reducing agents contribute to the improvement of concrete’s pore structure, thereby mitigating the shrinkage performance of recycled concrete to a certain extent.…”