КРИТЕРИИ ОЦЕНКИ ТЕХНИЧЕСКОГО СОСТОЯНИЯ ЖЕЛЕЗОБЕТОННЫХ ПЛИТ ПРИ КОРРОЗИИ АРМАТУРЫ

Abstract

To prevent premature wear and reduce the bearing capacity of reinforced concrete slabs, it is necessary to conduct a timely examination of their technical condition with the determination of the causes of defects with their subsequent elimination. At present, GOST 31937, which regulates the inspection rules, does not contain quantitative values of the technical condition criteria, according to which it is possible to assign a category of the technical condition of structures, including within the framework of a visual inspection. To identify the frequency of occurrence of defects associated with corrosion of reinforcement in reinforced concrete slabs of buildings and structures, as well as to determine the causes of their occurrence, 738 archival survey reports of TsNIIPromzdaniy JSC were considered. An analysis of previous surveys showed that defects caused by corrosion of reinforcement are among the most common and require more detailed instructions on the designation of the category of technical condition of structures. To develop criteria for the technical condition of reinforced concrete slabs with defects resulting from reinforcement corrosion, a calculation analysis of the effect of reinforcement corrosion on the bearing capacity was performed, the effect of corrosion products on the formation of longitudinal and transverse cracks, experimental data, and the requirements of regulatory documents were considered.