Secondary Raw Materials for Circular Economy in Construction Sector: A Review

Construction and demolition waste (CDW) is very high in quantity, 30% - 40% of total solid waste and their management is inadequate and lack the integration of sustainability concepts. This situation leads to severe environmental effects, which are mainly associated with the production of new building materials due to the low recovery rate. In fact some studies show that 5- 10% of total energy consumption across the EU is related to the manufacture of construction products. For this reason, CDW is a priority for many policies globally. For several years, a growing trend towards more sustainable construction processes has been taking place with a focus on secondary raw materials with lower environmental impacts on the entire life cycle. For this reason, this paper intends to contribute to increasing knowledge in this field through a review article. The review has the aim to evaluate the research gap, strategies to reduce construction waste and to promote the recycled materials use for a circular economy in construction sector. The results of the study showed that interest in this field of research has grown strongly over the years: the most publications on the subject relate to the last five years. On the other hand, issues relating to the topic did not attract particular interest in the range 2010-2016, in fact the number of publications in this period did not exceed 4%. The research showed that Europe is among the communities most sensitive to the issue and it has clearly revealed that there are still many barriers and research gaps to be overcome on this issue and the study has tried to identify the main ones.