1As part of the cooperation between the Ukrainian Center for Steel Construction and the Kyiv National University of Construction and Architecture, Rauta company implemented a project of an educational stand demonstrating the construction of energy-efficient buildings with sandwich panels.
The stand is installed at the Department of Architectural Structures in a specialized auditorium for energy saving, where students of the construction and architecture faculties study, and courses for training energy auditors are held.
The stand shows a full-size structure made of sandwich panels, which is mounted on a frame made of galvanized LGSF profiles. The steel structures are made of high-strength steel S350 with Zn galvanization ≥ 275 g/m2, and the frame elements are connected with bolts.
The airtight technology of the wall and roof structures is based on Ruukki sandwich panels of increased energy efficiency with a thickness of 200 mm and sealing elements at the joints. Maximum airtightness is achieved due to the construction of the roof with two Ruukki sandwich panels (SP2E 200 E-PIR Energy + SP2C 120/80 E-PIR) with an air gap between them.
The sandwich panels core is made of environmentally friendly self-extinguishing polyisocyanurate foam (PIR). The coefficient of thermal conductivity of the PIR sandwich panels core is λDesign = 0.022 W/mK, and the heat transfer coefficient U = 0.11 W/m2K. This provides extremely high reduced heat transfer resistance for wall R = 9.25 (m2∙K)/W and roof R = 13.05 (m2∙K)/W.
