Formation of thermal-insulating building envelopes of dome constructions for the far north regions

Abstract

Abstract The Far North territories development is carried out in most cases by the rotation-based work, with frequent deployment. Therefore, special conditions are imposed on the shift workers constructions. In particular, high insulating properties, resistance to wind and snow loads, multiple assembly and disassembly possibility, compactness in the traveling condition are presented to them. These requirements correspond to the dome prefabricated constructions. To calculate the thermal-insulating properties of building envelopes, climatic conditions were adopted for the city of Verkhoyansk, as the coldest settlement. The main task for such buildings is to provide the required thermal insolation with the minimum sizes of the building envelope. For this purpose, the prefabricated elements structure of dome-shaped constructions consisting of a timber frame shaped like a triangle 200 mm thick, filled with polyisocyanurate foam, a closed air space on both sides of the prefabricated elements, an OSB inner panel covered with thermal-insulating paint, an outer slab of cement-bonded particleboard, covered with bitumen tile was developed. Moisture protection of thermal-insulating materials is provided from the inside with aluminum foil, and from the external with wind-moisture-proof membrane. In the research process it was found that the thermal resistance of the building envelope without applying thermal insulating paint is R = 6,7 m2 K/W that is not enough for Verkhoyansk conditions. The treatment with liquid thermal-insulating paint increased the thermal resistance to R = 7,94 m2 K/W that exceeds the standard values.