Service life prediction models of concrete structures subjected to the initiation of reinforcing steel corrosion by chloride ions: contribution to the state of the art through systematic literature review – Part 2

Materia

article

Rayane Campos Lopes¹  Andrielli Morais de Oliveira¹  Oswaldo Cascudo¹ 

[1] Universidade Federal de Goiás

关键词: Reinforced concrete;    Predictive models;    Service life;    Reinforcement corrosion;    Chlorides;   

DOI  :  10.1590/1517-7076-RMAT-2022-44823

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

Several models for predicting the service life of reinforced concrete structures model the entry of aggressive agents, such as chlorides, generally based on modified diffusion laws or on multi chemical species transport models, considering different parameters. The application of these models can improve the efficiency and optimization of the design and service life of reinforced concrete structures. This article contemplates part 2 of the Systematic Literature Review (RSL) results with the aim of describing, analyzing and classifying the selected models in deterministic or probabilistic and in empirical, analytical and/or numerical models. As a result, it was observed that most of the models considered are based on Fick’s Second Law, modified or not modified. In addition, 72% of the models are analytical. Among the probabilistic models, the most used numerical method was the Monte Carlo simulation. Besides that, supplementary analyzes were made, such as the methods for calculating the diffusion coefficient (D), the critical contents (Ccr) used, the consideration of the non-saturation of the concrete by the models, chloride binding, cracks, the direction of penetration of the chlorides, among others. Although all models are a simplification of reality, attached some considerations and limitations, there was an evolution of predictive models to higher levels of complexity.

【 授权许可】

CC BY