Volume 22: Sustainable Energy Solutions for a Post-COVID Recovery towards a Better Future: Part V

Waste Cellular Concrete for Preparation of Shape-Stable Phase Change Materials HU Xiao, CHEN Mengdong, YAO Wenzhuo, CHANG Liang, XU Guizhi, LV Hongkun, DING Liwei, ZHANG Kang

Abstract

In order to absorb urban solid waste on a large scale and reduce the damage to the urban ecological environment caused by the massive accumulation of waste cellular concrete (WCC). In this work, WCC was used as skeleton material, which was pretreated, and sodium carbonate was used as phase change material to prepare shape-stable phase change materials (SSPCMs). The results show that the calcinated WCC could load with 45 wt.% Na2CO3. The melting latent heat of the SSPCM loading with 40 wt.% Na2CO3 was 20.45 J/g measured by differential scanning calorimeter (DSC) and the maximum thermal conductivity of the SSPCM measured by Laser Flash Analysis (LFA) was 0.24 W/(m·K). X-Ray diffraction (XRD) and Fourier transform infrared (FT-IR) showed that there was good chemical compatibility between skeleton material and phase change material.

Keywords Solid waste, shape-stable phase change material, cellular concrete, skeleton material, performance