Utilization of Beeswax/Bentonite as energy storage material on building wall composite

The combination of building materials and PCM is an efficient way to increase thermal energy storage capacity in building components. In this study, a study of the use of beeswax/bentonite PCM on the concrete walls of the building had been carried out. This investigation intended to ascertain the amount of concrete compressive strength if coarse aggregates were replaced in part by PCM beeswax/bentonite. The use of PCM-beeswax in the concrete has not been able to increase the strength of concrete. Even worse, their existence proof to decreased the compressive strength of PCM mixture concrete. Heat absorption test shows that PCM beeswax/bentonite is capable of decreasing the concrete temperature up to 6,67% compared to concrete without PCM. It also means that the PCM proposed in this study shows great potential for application as a phase change material in lightweight concrete.