Probabilistic Analysis of the Service Life of Concrete with Recycled Aggregates in Marine Environments

In marine environments, the main cause of degradation of reinforced concrete structures is corrosion induced by the penetration of chloride ions. Durability design approaches have gradually evolved toward performance-based approaches, which are capable of more accurately assessing the behavior of structures over time and their resistance under specific environmental exposure conditions. Due to the high variability of the parameters affecting the durability of these structures, a probabilistic performance-based approach tends to provide results closer to reality by considering the uncertainties of materials and degradation phenomena as random variables. In this work, a probabilistic service life analysis is carried out for concretes produced with RCA from the precast industry at different replacement levels under marine environment exposure conditions. The non-steady-state chloride diffusion coefficient was obtained using the Multi-Regime Method (\17) and subsequently used as an input parameter in the analyses. The Duracon model was used to estimate the probability of failure of these structures over time, considering a 100-year analysis period and different values of concrete cover, temperature, and environmental aggressiveness levels. The service life estimation was performed considering a target failure probability of 10%.