Influence of the incorporation of construction and demolition waste functionalized with phase change material on the mechanical properties of concrete

Abstract

The growth of urbanization has led to the rapid development of the construction industry, resulting in a large amount of construction and demolition waste (CDW) and, at the same time, an increase in energy consumption and carbon dioxide (CO₂) emissions into the atmosphere. The simultaneous application of CDW and latent heat technologies incorporated into concrete allows for the reuse of recycled aggregates while also minimizing energy consumption during the building's use period. The main objective of this study is to evaluate the incorporation of phase change material (PCM) in recycled aggregates from CDW, used to replace natural aggregates in concrete production, as well as to evaluate the mechanical behaviour of the produced concrete. The incorporation of PCM in recycled aggregates was carried out using two different techniques, vacuum and atmospheric pressure, and concrete was produced with the different aggregates. It was possible to verify that the presence of recycled aggregate doped with PCM negatively affected the mechanical performance of the different developed concrete formulations.