The construction industry is responsible for high energy and raw materials consumption.
Thus, it is important to minimize the high energy consumption by taking advantage of renewable
energy sources and reusing industrial waste, decreasing the extraction of natural materials. The
mortars with incorporation of phase change materials (PCM) have the ability to regulate the
temperature inside buildings, contributing to the thermal comfort and reduction of the use of heating
and cooling equipment, using only the energy supplied by the sun. The simultaneous incorporation
of PCM and fly ash (FA) can reduce the energy consumption and the amount of materials
landfilled. However, the addition of these materials in mortars modifies its characteristics. The main
purpose of this study was the production and characterization in the fresh and hardened state of
mortars with incorporation of different contents of PCM and FA. The binders studied were aerial
lime, hydraulic lime, gypsum and cement. The proportion of PCM studied was 0%, 20%, 40% and
60% of the mass of the sand. The content of fly ash added to the mortars was 0%, 20%, 40% and
60% of the mass of the binder. It was possible to observe that the incorporation of PCM and fly ash
in mortars caused differences in properties such as workability, microstructure, water absorption,
compressive strength, flexural strength and adhesion.