Temperature and strain characteristics of ceramic-reinforced polyurethane insulation decorative board under artificial accelerated aging conditions

Abstract

As a new type of thermal insulation material, ceramic-reinforced polyurethane insulation decorative board (IDB) has been applied to a certain extent, but changes in the temperature and strain between this material and the substrate wall during the aging process remain unclear. In this study, an external insulation composite system with ceramic-reinforced polyurethane IDB was subjected to 60 heat-rain cycles, and the temperature and strain at the interface between the IDB and the substrate wall were measured. The results show that the ceramic-reinforced polyurethane IDB had good thermal insulation performance and durability, while the horizontal and vertical strains exhibited serious inhomogeneity, which may be an important reason for the aging and cracking of the IDB. The characteristics of temperature and strain at the interface between the IDB and the substrate wall provide a reference for analyzing the synergistic effect and the disassembly of the two and can provide some guidance for the design and construction of external insulation composite systems.