A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Accelerated Carbonation of Recycled Concrete Aggregates: Impact on Durability of Concrete
The Fastcarb project addresses the imperative to mitigate CO2 emissions associated with cement production, a significant contributor to global carbon emissions. Focusing on recycled concrete aggregates (RCA) obtained from deconstruction activities, the project aims to expedite the carbonation of these aggregates, enhancing their quality and reducing porosity to diminish the overall CO2 impact of concrete structures. Laboratory optimization of the accelerated carbonation process demonstrated its feasibility for industrial application. Initial results indicated a potential CO2 storage of 10 to 40 kg per ton of RCA. Two industrial-scale demonstrators connected to cement plant kiln gases produced 80 tons of carbonated RCA with an initial capture rate of 3–4%.
This paper discusses concretes incorporating carbonated RCA, presenting comparative tests on various incorporation rates and essential concrete properties. Durability assessments revealed that carbonation treatment did not increase corrosion risks in reinforced concrete. The study extended to the fabrication of prefabricated products and cast-in-situ structures, affirming the feasibility of utilizing carbonated aggregates in real-world scenarios without observable differences in behavior compared to non-carbonated recycled aggregates.
Accelerated Carbonation of Recycled Concrete Aggregates: Impact on Durability of Concrete
The Fastcarb project addresses the imperative to mitigate CO2 emissions associated with cement production, a significant contributor to global carbon emissions. Focusing on recycled concrete aggregates (RCA) obtained from deconstruction activities, the project aims to expedite the carbonation of these aggregates, enhancing their quality and reducing porosity to diminish the overall CO2 impact of concrete structures. Laboratory optimization of the accelerated carbonation process demonstrated its feasibility for industrial application. Initial results indicated a potential CO2 storage of 10 to 40 kg per ton of RCA. Two industrial-scale demonstrators connected to cement plant kiln gases produced 80 tons of carbonated RCA with an initial capture rate of 3–4%.
This paper discusses concretes incorporating carbonated RCA, presenting comparative tests on various incorporation rates and essential concrete properties. Durability assessments revealed that carbonation treatment did not increase corrosion risks in reinforced concrete. The study extended to the fabrication of prefabricated products and cast-in-situ structures, affirming the feasibility of utilizing carbonated aggregates in real-world scenarios without observable differences in behavior compared to non-carbonated recycled aggregates.
Accelerated Carbonation of Recycled Concrete Aggregates: Impact on Durability of Concrete
Lecture Notes in Civil Engineering
Barros, Joaquim A. O. (editor) / Cunha, Vítor M. C. F. (editor) / Sousa, Hélder S. (editor) / Matos, José C. (editor) / Sena-Cruz, José M. (editor) / Pernin, Thomas (author) / Torrenti, J.-M. (author) / Potier, J.-M. (author) / Izoret, L. (author) / Mai-Nhu, Jonathan (author)
FIB International Conference on Concrete Sustainability ; 2024 ; Guimarães, Portugal
4th fib International Conference on Concrete Sustainability (ICCS2024) ; Chapter: 5 ; 36-43
2025-01-09
8 pages
Article/Chapter (Book)
Electronic Resource
English
Accelerated Carbonation of Recycled Concrete Aggregates and Model Materials
| Springer Verlag | 2023