Abstract
This paper took the partial renovation project of an old factory building in Wuhan as an example to study its external wall insulation system. A new insulation system was designed based on inorganic vitrified micro-bubbles. The material was briefly analyzed. The performance of the new insulation system was detected by designing test specimens. The results found that the specimens had good compressive, tensile and flexural properties, reaching the standard of A1 grade of construction materials, the specimens were non-combustible, and the temperature change of the concrete base was stable under the action of heating-cooling and heating-rain cycles, suggesting good thermal insulation performance. The results verify the effectiveness of the insulation system. The insulation system can be better applied in practice.