Experimental and Numerical FE² Study of Chloride Ions Ingress in Unsaturated Recycled Aggregates Concrete

[en] Chloride-induced corrosion poses a substantial risk to reinforced concrete structures. The use of Recycled Concrete Aggregates (RCA) as a substitute for Natural Aggregates (NA) exacerbates durability concerns. Indeed, the adhesive mortar paste reduces the mechanical characteristics of concrete, whilst possibly altering its durability. However, Recycled Aggregates Concrete (RAC) presents a sustainable construction approach that reduces landfill waste and conserves natural resources. A comprehensive experimental investigation was undertaken on concretes composed of NA and RCA. Their inherent properties in terms of water transport and chloride ion ingress were assessed. A multiscale chemo-hydraulic model was created using the Finite Element Squared (FE ) method, and then verified and calibrated. The model’s constitutive equations use intrinsic properties obtained from experimental data. The results demonstrate the model’s accuracy in providing additional insight into chloride ingress in both saturated and unsaturated concrete. The research findings suggest that the durability of RAC may be comparable to that of NAC under specific mixture quality and environmental conditions. To evaluate this, a modelling application was carried out, which replicated actual conditions on a maritime lock wall.

Disciplines :

Civil engineering
Engineering, computing & technology: Multidisciplinary, general & others
Materials science & engineering

Author, co-author :

Fanara, Arthur ; Université de Liège - ULiège > Urban and Environmental Engineering

Courard, Luc ; Université de Liège - ULiège > Urban and Environmental Engineering

Collin, Frédéric ; Université de Liège - ULiège > Urban and Environmental Engineering

Language :

English

Title :

Experimental and Numerical FE² Study of Chloride Ions Ingress in Unsaturated Recycled Aggregates Concrete

Publication date :

2025

Main work title :

Lecture Notes in Civil Engineering

Publisher :

Springer Nature Switzerland

ISBN/EAN :

978-3-03-180672-8
978-3-03-180671-1

Peer reviewed :

Peer reviewed

Additional URL :

https://link.springer.com/content/pdf/10.1007/978-3-031-80672-8_25

Funders :

FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture

Funding number :

FC 38499

Available on ORBi :

since 06 January 2025

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Bibliography

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