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Potential of CO2-Storage in Recycled Concrete Aggregates by Accelerated Carbonation
Department of Infrastructure and Concrete Technology, RISE Research Institutes of Sweden, Gothenburg, Sweden.
Department of Infrastructure and Concrete Technology, RISE Research Institutes of Sweden, Gothenburg, Sweden.
University of Borås, Faculty of Textiles, Engineering and Business. Department of Infrastructure and Concrete Technology, RISE Research Institutes of Sweden, Gothenburg, Sweden.ORCID iD: 0000-0001-9867-7631
2023 (English)In: SynerCrete 2023: International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures / [ed] Agnieszka Jędrzejewska, Fragkoulis Kanavaris, Miguel Azenha, Farid Benboudjema, Dirk Schlicke, Springer, 2023, Vol. 44, p. 604-615Conference paper, Published paper (Other academic)
Abstract [en]

To reduce the carbon footprint of cementitious materials and resource extraction intensity of concrete industry (natural gravel or crushed rock), usage of recycled concrete aggregate (RCA) in concrete and as a CO2-sink by accelerated carbonation is widely investigated. Implementation of this technology will not only reduce the climate impact, but also improve the performance of the RCA creating a truly circular material. At first, some locally available recycled concrete was crushed in different fractions and characterized. To quantify the adhered mortar/aggregate content ratio on the as-received RCA, an image analysis method (IAM) was introduced. The analysis revealed that the adhered mortar accounts for around 40% of the RCA independently on the fraction. The results of IAM of as-received RCA were used to evaluate its remaining potential of CO2-storage. The effect of accelerated carbonation on the quality of RCA was evaluated by means of water absorption. The carbonation was determined by means of thermogravimetric analyses (TGA) and its derivative curve (DTG) resulting in similar CO2-storage for coarse fractions 4/8 mm and 8/16 mm under the accelerated carbonation conditions.

Place, publisher, year, edition, pages
Springer, 2023. Vol. 44, p. 604-615
Series
RILEM Bookseries, ISSN 2211-0844, E-ISSN 2211-0852 ; 44
Keywords [en]
accelerated carbonation, IAM, Recycled concrete aggregate, TGA
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:hb:diva-30265DOI: 10.1007/978-3-031-33187-9_56Scopus ID: 2-s2.0-85162145702ISBN: 978-3-031-33186-2 (print)ISBN: 978-3-031-33187-9 (electronic)OAI: oai:DiVA.org:hb-30265DiVA, id: diva2:1787853
Conference
International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, Adamas, Greece, 15-16 June, 2023
Available from: 2023-08-15 Created: 2023-08-15 Last updated: 2023-08-29Bibliographically approved

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Oliva Rivera, AlexanderMalaga, Katarina

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