EXPERIMENTAL INVESTIGATIONS ON RECYCLED CONCRETE WITH FLYASH AND RCA
DOI:
https://doi.org/10.48047/6nkjxr54Keywords:
recycled coarse aggregate; recycled fine aggregate; accelerated carbonation; microstructure; carbon emissionAbstract
This study explored enhancing recycled aggregate concrete (RAC) by using both recycled coarse and fine aggregates, with fly ash partially replacing cement. After adjusting the recycled aggregates for continuous gradation, the effects of accelerated carbonation on RAC's performance and microstructure were assessed using mercury intrusion porosimetry and SEM-EDS analysis. Results showed that carbonation increased RAC compressive strength by up to 13% and compacted its microstructure. Using 20% fly ash reduced carbon emissions by over 13%, supporting sustainable development. The optimal recycled fine aggregate content was found to be under 15% for best results.
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References
United Nations, Department of Economic and Social Affairs, Population Division. World Urbanization Prospects: The 2018 Revision; United Nations: New York, NY, USA, 2019; ISBN 978-92-1-004314-4.
UN Environment Programme. Global Resources Outlook; UN Environment Programme: Nairobi, Kenya, 2024.
Bu, C.; Liu, L.; Lu, X.; Zhu, D.; Sun, Y.; Yu, L.; OuYang, Y.; Cao, X.; Wei, Q. The Durability of Recycled Fine Aggregate Concrete: A Review. Materials 2022, 15, 1110. [CrossRef]
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