Más allá de la rehabilitación en una obra emblemática: monitorización de las cubiertas del hipódromo de la Zarzuela = Beyond the rehabilitation in an emblematic work: monitoring the decks of the Zarzuela racecourse

La Zarzuela racecourse, declared a national historical heritage, was built in Madrid in the 1940s, and is a work by EngineerEduardo Torroja and the architects Arniches and Domínguez. The covers of ist structure are considered an art from the engineeringpoint of view. Despite the perfect and ingenious physical and mechanical balance, physical and physical-chemical processes ofdeterioration in ist composition were initiated due to the long period of exposure of the structure to climatic action and the attack ofaggressive atmospheric agents, among which the main pathology is the corrosion by carbonation of ist embedded armor. Given theimportance of the work from the artistic, historical and security point of view, the corresponding authorities decided on itsrehabilitation. In this repair project, the installation of a continuous measurement monitoring system was contemplated, using passiveelectrochemical sensors, capable of indicating the risk of corrosion in the structure's embedded reinforcement. In this way, it is possibleto control the behavior of the material against the interaction with atmospheric action and to foresee the possible need for maintenanceinterventions, avoiding the advance of deterioration with speed and guarantees. The implementation of the monitoring required anevaluation by non-destructive electrochemical techniques of the degree of deterioration prior to the intervention, in order to study theevolution of the behavior of the structure after the repair. In the present work, the results obtained in the previous electrochemicalevaluation on the decks of the Hipódromo de la Zarzuela are presented, as well as their subsequent monitoring for almost 10 years.The viability of the monitoring system and ist reliability over time are also presented.