Performance of recycled concrete aggregates in gravel-cement mixtures : strength, shrinkage, and durability analysis
- Author
- Oussama Atoui, Azer Maazoun (UGent) and Ahmed Siala
- Organization
- Abstract
- The depletion of high-quality natural aggregates due to excessive quarrying presents a major challenge in sustainable road construction. This study investigates the incorporation of recycled concrete aggregates (RCA) into gravel-cement mixtures for pavement base layers. Four formulations were de-veloped with 0%, 25%, 50%, and 75% RCA, while maintaining a fixed cement dosage of 4%. Laboratory testing included compressive strength, flexural strength, indirect tensile strength, shrinkage, and water absorption. The results showed that increasing RCA content reduced compressive strength by up to 10.6% (from 3.5 MPa to 3.1 MPa at 28 days) and flexural and tensile strengths by 15.6% and 10.4%, respectively. However, all mixtures exceeded the mini-mum strength required for pavement base layers (≥2.5 MPa at 28 days). Shrink-age strain decreased by up to 20%, and water absorption increased moderately but remained within acceptable limits. These findings confirm that gravel-cement mixtures with high RCA content can meet mechanical and durability requirements while offering environmental and economic benefits.
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01KCKB1TNQFF8DVPANHRNYVHEX
- MLA
- Atoui, Oussama, et al. “Performance of Recycled Concrete Aggregates in Gravel-Cement Mixtures : Strength, Shrinkage, and Durability Analysis.” Concrete and Circular Economy : Results of CCE 2025, edited by Atef Daoud and György László Balázs, vol. 63, Springer, 2025, pp. 56–68, doi:10.1007/978-3-032-06802-6_6.
- APA
- Atoui, O., Maazoun, A., & Siala, A. (2025). Performance of recycled concrete aggregates in gravel-cement mixtures : strength, shrinkage, and durability analysis. In A. Daoud & G. László Balázs (Eds.), Concrete and Circular Economy : results of CCE 2025 (Vol. 63, pp. 56–68). https://doi.org/10.1007/978-3-032-06802-6_6
- Chicago author-date
- Atoui, Oussama, Azer Maazoun, and Ahmed Siala. 2025. “Performance of Recycled Concrete Aggregates in Gravel-Cement Mixtures : Strength, Shrinkage, and Durability Analysis.” In Concrete and Circular Economy : Results of CCE 2025, edited by Atef Daoud and György László Balázs, 63:56–68. Cham: Springer. https://doi.org/10.1007/978-3-032-06802-6_6.
- Chicago author-date (all authors)
- Atoui, Oussama, Azer Maazoun, and Ahmed Siala. 2025. “Performance of Recycled Concrete Aggregates in Gravel-Cement Mixtures : Strength, Shrinkage, and Durability Analysis.” In Concrete and Circular Economy : Results of CCE 2025, ed by. Atef Daoud and György László Balázs, 63:56–68. Cham: Springer. doi:10.1007/978-3-032-06802-6_6.
- Vancouver
- 1.Atoui O, Maazoun A, Siala A. Performance of recycled concrete aggregates in gravel-cement mixtures : strength, shrinkage, and durability analysis. In: Daoud A, László Balázs G, editors. Concrete and Circular Economy : results of CCE 2025. Cham: Springer; 2025. p. 56–68.
- IEEE
- [1]O. Atoui, A. Maazoun, and A. Siala, “Performance of recycled concrete aggregates in gravel-cement mixtures : strength, shrinkage, and durability analysis,” in Concrete and Circular Economy : results of CCE 2025, Hammamet, Tunisia, 2025, vol. 63, pp. 56–68.
@inproceedings{01KCKB1TNQFF8DVPANHRNYVHEX,
abstract = {{The depletion of high-quality natural aggregates due to excessive quarrying presents a major challenge in sustainable road construction. This study investigates the incorporation of recycled concrete aggregates (RCA) into gravel-cement mixtures for pavement base layers. Four formulations were de-veloped with 0%, 25%, 50%, and 75% RCA, while maintaining a fixed cement dosage of 4%. Laboratory testing included compressive strength, flexural strength, indirect tensile strength, shrinkage, and water absorption. The results showed that increasing RCA content reduced compressive strength by up to 10.6% (from 3.5 MPa to 3.1 MPa at 28 days) and flexural and tensile strengths by 15.6% and 10.4%, respectively. However, all mixtures exceeded the mini-mum strength required for pavement base layers (≥2.5 MPa at 28 days). Shrink-age strain decreased by up to 20%, and water absorption increased moderately but remained within acceptable limits. These findings confirm that gravel-cement mixtures with high RCA content can meet mechanical and durability requirements while offering environmental and economic benefits.}},
author = {{Atoui, Oussama and Maazoun, Azer and Siala, Ahmed}},
booktitle = {{Concrete and Circular Economy : results of CCE 2025}},
editor = {{Daoud, Atef and László Balázs, György}},
isbn = {{9783032068019}},
issn = {{2211-0844}},
language = {{eng}},
location = {{Hammamet, Tunisia}},
pages = {{56--68}},
publisher = {{Springer}},
title = {{Performance of recycled concrete aggregates in gravel-cement mixtures : strength, shrinkage, and durability analysis}},
url = {{http://doi.org/10.1007/978-3-032-06802-6_6}},
volume = {{63}},
year = {{2025}},
}
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