Problems of a Thermal Insulation of Multystoried Cast-in-Place Concrete Frame Buildings in the Conditions of Extreme North

In recent years in Yakutsk began to build residential buildings 12-16 floors high with a reinforced concrete framework. Thermovision examinations of these buildings are conducted and the analysis of thermograms of a surface of the protecting designs is made. Sites of violation of thermal protection of buildings are established and calculations of the main clusters of the external protecting designs with application of programs of a three-dimensional temperature profile are carried out. The comparative analysis of calculation datas with natural data on thermovision inspection is made. The main reasons for violation of thermal protection of the protecting structures of multystoried buildings are established. In a basement storey of buildings low temperature on an internal surface of designs is bound to existence of thermal bypass in places of an adjunction of a laying of external and internal walls to basement floor slabs, reinforced concrete columns to basement floor slabs with a foundation framework. During the winter period at especially low temperature of fresh air penetration of cold air in multystoried buildings is promoted by the increased air infiltration. (paper)