Development of a new lightweight gypsum composite: Effect of mixed treatment of barley straws with hot water and bio-based phase change material on the thermo-mechanical properties

Abstract

Regenerative construction currently enables the development of regenerative composites intended for the thermal rehabilitation of outside walls. The composite studied is the gypsum lightened by barley straws treated with hot water (BS.HW) and then treated with the bio-based phase change material (palm oil (PO)). The aim is to improve the thermophysical properties of the composite studied. The results show that the new lightweight gypsum composite with the ratio 2.6:1 of (PO:BS.HW.3%) has improved the thermal diffusivity, with a reduction of 12.1% compared to the basic composition. The microstructural analysis results are also very interesting, especially considering the good chemical stability.