Análisis de barras de acero reutilizado, producto de demoliciones en la ciudad de Bogotá

Abstract

This research work is based on the observation of the practice of commercialization of reused steel in the city of Bogotá, Colombia. At present there is the trade of second-hand steel in the capital of the country, without any control that can represent a high risk in this reuse in the field of construction, since the first time this practice is not contemplated in Colombia's quake-resistant legislation and secondly the lack of quality control of this material can lead to poor structural performance in buildings and even cause problems due to weakening or collapse. When steel has already had a useful life and is subjected to new efforts, weathering and moisture generated by concrete casting and bending; Their levels of resistance, creep and stiffness can be significantly reduced, their lack of quality and properties are reflected when they are exposed to seismic stress, because the structure can not provide optimum performance to create safety for future users. In the present investigation, a series of reused bars are analyzed, in which the following aspects are evaluated: diameter, twisted bar, dirt (rust and concrete adhesion to the bar), type of corrugate and detailed observations on the condition of the bar. For this problem it is sought to investigate and analyze the behavior of the steel by subjecting it to inspection and tensile tests, where the strength of the reused steel will be evaluated in comparison to the first hand steel, in order to determine its mechanical resistance and to analyze if the recycled material represents A risk for its low performance according to the results obtained. In conducting this analysis, it is determined whether it is possible to use this steel adequately in low strength construction elements. Physics and mechanics.