PSI - Issue 45

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 45 (2023) 66–73

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov Abstract This paper presents a pioneering experimental investigation on the effects of lateral confining pressure and recycling cycles on the mechanical properties of natural aggregate concrete (NAC) and 3 generations of multi-recycled concrete (Multi-RAC) subjected to triaxial compression. The results indicate that both lateral confining pressure and recycling cycles have a significant influence on the triaxial mechanical characteristics of Multi-RAC specimens. The peak stress and peak strain increase with the increase of lateral confining pressure. Although the strength of Multi-RAC is inferior to NAC, the 2 nd and 3 rd generations present a relatively smaller downward trend compared to the 1 st generation. The deformation ability of Multi-RAC is larger than NAC, especially for the 1 st and 2 nd generations. The elastic modulus of the 1 st and 2 nd generations are smaller than the counterparts of NAC and the 3 rd generation. Based on experimental data, a failure criterion is proposed for Multi-RAC with proper consideration of the effects of the lateral confining ratio and the number of recycling cycles. The related outcomes are expected to provide the reference for safe engineering design and facilitate the structural application of Multi-RAC. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov Keywords: Multi-recycled aggregate concrete; Mechanical propoeties; Recycling cycles; Triaxial compression; Failure criterion 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) Investigation on mechanical properties and failure criterion of multi recycled aggregate concrete under triaxial compression Yipu Guo a , Bin Lei a,b , Linjie Yu b , Xuqun Lin a , Wengui Li a,* a School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia b School of Infrastructure Engineering, Nanchang University, Jiangxi 330031, China

1. Introduction The continuous advancement of global urbanization and industrialization give rise to the increasing global demand of natural aggregate and booming construction activities. The rehabilitation and renovation involved in urban renewal

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Prof. Andrei Kotousov 10.1016/j.prostr.2023.05.015