Title: Investigation of the behaviour of recycled aggregate concrete columns under bi-eccentric compression

Authors: Bushra D. Alakkari; Soleman A. Alamodi

Addresses: College of Civil Engineering, AlWataniya Private University, Syria ' College of Civil Engineering, Albaath University, Syria

Abstract: This paper investigates the behaviour of recycled aggregate concrete columns under bi-eccentric compression. In order to assess the results, samples of concrete mixes containing 0%, 25%, 50%, 75% and 100% recycled aggregate were prepared and tested. In addition, reinforced concrete columns designated C0, C25, C50, C75 and C100 were fabricated and tested under monotonic biaxial eccentric compression loading using three eccentricity values. The results show that the stress-strain curve for concrete made with recycled aggregates has a similar shape to that of concrete made with natural aggregates, with a lower peak stress and more deformability in the descending branch. The results led to the conclusion that recycled aggregate concrete with a controlled particle size distribution, a plasticizer and a calibrated W/C ratio could be used for columns subjected to eccentric compression. The loss in load-bearing capacity is between 2% and 20%, with the same failure modes.

Keywords: recycled aggregate; RA; natural aggregate; bi-eccentric pressure; replacement; strain-stress curve.

DOI: 10.1504/IJMRI.2025.149801

International Journal of Masonry Research and Innovation, 2025 Vol.10 No.6, pp.507 - 522

Received: 19 Sep 2023
Accepted: 22 Dec 2023
Published online: 13 Nov 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article