NEW ASPECT AT THE USE OF FIBERGLASS IN THE CONSTRUCTION OF INDUSTRIAL CHIMNEYS

The change in the operational characteristics of reinforced concrete chimneys with a monolithic lining when changing the traditional construction technology is considered. The difference between the traditional and proposed technology is the replacement of the separating element of the concrete lining and the supporting concrete of the chimney trunk. Traditionally, when installing industrial pipes with a monolithic lining, both with the use of sliding formwork and lifting-adjustable, with almost simultaneous laying of two types of concrete, a steel mesh is used as a separating layer. It is proposed to replace the steel mesh with fiberglass with a heat-insulating coating. Thermal insulation of the "Bronya" type is considered as a multilayer thermal insulation coating. The work presents a comparative analysis of changes in the distribution of temperature fields along the chimney wall during the introduction of this technology on the example of the chimney of the Krasnoyarsk CHPP-1 h=275 m. It is proved that the replacement of steel mesh with fiberglass with a heat-insulating coating improves the physical and chemical characteristics of the structure and provides a more efficient thermal operation of the chimney. The use of this technology will also improve the organization of construction production, reduce construction time and costs, reduce the material consumption of chimney structures and the complication of work on its construction, reduce the possibility of defects and destruction. Therefore, the introduction of the proposed technology will increase the reliability and lifespan of the structures of industrial reinforced concrete chimneys with a monolithic lining