Abstract

ROA-RODRIGUEZ, Guillermo; APERADOR-CHAPARRO, William  and  DELGADO-TOBON, Emilio. Design of a Remote Monitoring System for Evaluation of Corrosión in Reinforced Concrete Structures under Chloride Ion Attack. Ing. invest. y tecnol. [online]. 2015, vol.16, n.4, pp.565-572. ISSN 2594-0732.

In this paper it was designed and built a remote monitoring equipment that allows to obtain the corrosion potential in reinforcing steels embedded in reinforced concrete, which were previously subjected to chloride attack in a hostile environment. The monitoring system, based on ASTM standard C876-91, determines from 0% to 100% the probability of corrosion on the samples tested. The system provides ease of perform field installation, if there is cellular network coverage, and may be operated remotely using text messages to start and stop measurements, whose results are stored in a local data logger on microSD cards and then are sent via the general packet radio service (GPRS) to a web server which allows to access to the data via a web page, where the test results can be seen graphically. The concrete samples used as reference for monitoring degradation were immersed in chloride ion (3.5% NaCl) for 12 months. Data for corrosion potential were generated through the exposure-concrete interface, corresponding to a system with a 90% probability of corrosion.

Keywords : corrosion; in situ monitoring; rebars; equipment design; concrete structures; chloride attack.