RC beams with an early phase of reinforcement damage

Abstract

This article presents the experimental results of reinforced concrete beams with thermally strengthened reinforcement. According to engineering experience, rein-forced concrete is the most commonly used construction material today. Rein-forced concrete structures are widely used in buildings and roof structures for both industrial and civil purposes. Reinforced concrete is optimally used as part of building structures and effectively performs its functions, perceiving various types of force and non-force influences, the nature of which depends on the conditions of operation in different environments. At the same time, for reinforced concrete structures, the durability and residual bearing capacity sometimes de-pends not only on force loads, but also on the effects of the surrounding environment. One of the most dangerous effects are corrosion processes, which cause the appearance of defects of various degrees and, accordingly, a decrease in the load-bearing capacity of structural elements. At the same time, the intensity of degradation of structures under the influence of an aggressive environment de-pends on the operating conditions, chemical composition and concentration of the aggressive environment. That is why, two beams with a diameter of 20 mm of reinforcement of class A500C were designed and experimentally tested, and the other two beams were tested with damage from 20 mm to 18 mm of the outer thermally strengthened layer. Damage from 20 mm to 18 mm corresponds to 19% of undamaged samples.