Development and energy evaluation of novel integrated envelopes without thermal bridges

Abstract

In this study, to eliminate thermal bridges caused by traditional insulation system, a new synthesis method of novel integrated envelopes was proposed. This proposed integrated envelope consisted of two layers, including the base part and insulation part. Construction solid wastes were applied as raw materials and the influences of the raw material ratio, additive content, and sintering temperature on micro and macro performances were investigated. The experiment results show that the optimal sample was sintered at 1200 °C, with raw materials of 50 wt% waste glass, 40 wt% mineral wool waste, 10 wt% waste quartz for both parts, and with another 2 wt% SiC and 1–3 wt% Na3PO4·12H2O for the insulation part. The corresponding optimal samples have the best performance, such as the dense base, a uniform pore structure, and good thermal insulation. Moreover, the energy analysis results revealed that this proposed material has good environmental sustainability and could efficiently reduce the negative impact of thermal bridges with the energy conservation of 8.18%.