Abstract
A literature review comprising 163 publications published over a period of 26 years from 1992 to 2018 is presented in this paper. This review discusses the generation and recycling of construction and demolition waste (CDW) as well as its main uses as raw materials for the construction engineering sector. This review pays attention to the use of CDW aggregates for sand, pavements/roads, bricks, ceramics, cementitious materials, and concrete productions, as well its uses as eco-friendly materials for water decontamination. The physical-chemical and mechanical characteristics of recycled aggregates play an important role in their correctly chosen applications. The results found in this literature survey allow us to conclude that recycled aggregates from CDW can be successfully used to produce construction materials with quality comparable to those produced with natural aggregates. We concluded that the use of CDWs as raw materials for manufacturing new construction materials is technically feasible, economical, and constitutes an environmentally friendly approach for a future construction and demolition waste management strategy.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
The ability of a recycled aggregate to absorb more water is due to the high presence of the adhered mortar onto the aggregate’s surface which, leads to a higher porosity of aggregate; this can affect the amount of water available for mixing, influencing the cement hydration and leading to problems related to the loss of concrete workability at the fresh state and the loss of mechanical and durability performances in the long-term [27]
They could require appropriate disposal or segregation by a separation technology able to remove/reduce the amount of such contaminants. If it is not properly managed, construction and demolition waste (CDW) might contain small amounts of several hazardous substances such as metal-based paints, adhesives, phenols, resins, aromatic hydrocarbons, and others [21]. Once these substances are in the CDW and those are used as Recycled Aggregates (RAs) for construction materials such as concrete, bricks, and roads, they can pose particular risks to the environment by contact with rainwater or infiltration, which can leach out these harmful elements
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. CDW is produced in virtually all activities related to the construction and demolition sectors, such as the construction of buildings, houses, roads, bridges, flyovers, etc. These residues consist of distinct types of materials and are a heterogeneous residue that can contain any constituent that is part of a building or infrastructure, as well as any other materials used during construction work [1,4]. According to the final report published by European Union [2], it showed that fourteen member states already achieved the 70% target (see Table 1), and six other countries were very close, with a recovery rate higher than 60%.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
