建筑中增加“凹回”或“凸起”部位,在设计造型中很普遍,但在北方寒冷地区,这些部位的楼板处容易形成“冷桥”,影响正常使用,故这一部位的保温需特殊处理。常规做法是:结构层上加保温材料,其上现浇细石混凝土面层,再铺地面砖(图1),但实践证明这一做法弊病不少,主要表现在以下几个方面:①以北方地区冬季气温计算的保温材料厚度平均在 The addition of “recessed” or “convex” parts in the building is common in the design. However, in the cold regions of the north, the “cold bridge” is easily formed at the floor of these parts, which affects the normal use. Therefore, the insulation of this part needs to be Special treatment. The conventional practice is to add thermal insulation material on the structural layer, infiltrate the fine stone concrete surface layer, and then lay the floor tile (Figure 1). However, practice has proved that this approach has many disadvantages, mainly in the following aspects: 1 The average temperature of insulation material calculated in winter in northern regions is