RESTORATION OF BALCONY PLATES OF RESIDENTAL BUILDINGS USING SPRAYED CONCRETE MIXTURES

Abstract

The article presents an analysis of the state of balconies slabs of residential buildings as a load-bearing structures. A study of the condition of balcony slabs of residential buildings was carried out. The necessity of carrying out repair work for the structures of the balconies of residential buildings is substantiated. A number of arguments are presented in favor of carrying out work on the restoration of balcony slab structures as an important element of a residential building. The main defects of balcony slabs and the group of balconies’ states as a structure are determined. It was determined that the main reason for the loss of bearing capacity of balcony structures is the destruction of the protective layer of concrete under the influence of atmospheric phenomena and the exposure of metal elements, which become unable to perform their functions due to significant corrosion. The main defects of balcony elements and their main features are described. The degree of danger of various types of defects of balcony slabs for a sudden loss of load-bearing capacity and, as a consequence, the occurrence of emergency situations, has been determined. Activities to improve the condition of balcony slabs are proposed. The technology of using sprayed concrete for repair works is substantiated as the most modern and progressive method. Compositions of dry building mixtures for repair works and works on strengthening structures of residential buildings using raw materials of natural and man-made origin are provided. The advantages of using a combination of natural and man-made raw materials for the production of sprayed concrete mixtures have been determined. The rheological, physical and mechanical properties of the proposed repair materials were determined. Their advantages and disadvantages of sprayed concrete mixtures based on combination of natural and man-made raw materials are established. The effectiveness of the use of industrial waste as raw material for repair mixtures is substantiated.