Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete

Liu, Huanqin; Shi, Nuoqi; Yu, Zhifa; Liu, Bin; Zhu, Yonglin

doi:10.3390/buildings15173009

Open AccessArticle

Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete

by

Huanqin Liu

,

Nuoqi Shi

,

Zhifa Yu

,

Bin Liu

^* and

Yonglin Zhu

College of Architecture Engineering, North China Institute of Aerospace Engineering, Langfang 065000, China

^*

Author to whom correspondence should be addressed.

Buildings 2025, 15(17), 3009; https://doi.org/10.3390/buildings15173009

Submission received: 8 July 2025 / Revised: 21 August 2025 / Accepted: 22 August 2025 / Published: 24 August 2025

(This article belongs to the Special Issue Advances in Modern Structural Engineering: From Materials to Building Structures)

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Abstract

To promote the recycling and reuse of waste concrete, this study investigated the comprehensive impact of recycled aggregate (RA) content and particle size on the mechanical properties of concrete. A novel equivalence parameter (λ_eq) of RA was developed to consider the influence of RA content and size on the mechanical properties of concrete. Empirical equations were developed using linear regression to describe the test results and predict the impact of content and size of RA on the mechanical properties of concrete. The results showed that the comprehensive impact on the mechanical strength of recycled concrete shows a certain regularity when the content and particle size of RA change simultaneously. The measured mechanical properties and regression equations provided a reference and basis for engineering applications, such as the processing of RA in a crushing plant, the design of mix proportions in concrete using RA, and the rapid assessment of mechanical properties on-site. This study provides a design method and technical path for green construction.

Keywords: recycled concrete; recycled aggregate; aggregate size; compressive strength; splitting tensile strength; stress-strain curve

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MDPI and ACS Style

Liu, H.; Shi, N.; Yu, Z.; Liu, B.; Zhu, Y. Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete. Buildings 2025, 15, 3009. https://doi.org/10.3390/buildings15173009

AMA Style

Liu H, Shi N, Yu Z, Liu B, Zhu Y. Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete. Buildings. 2025; 15(17):3009. https://doi.org/10.3390/buildings15173009

Chicago/Turabian Style

Liu, Huanqin, Nuoqi Shi, Zhifa Yu, Bin Liu, and Yonglin Zhu. 2025. "Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete" Buildings 15, no. 17: 3009. https://doi.org/10.3390/buildings15173009

APA Style

Liu, H., Shi, N., Yu, Z., Liu, B., & Zhu, Y. (2025). Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete. Buildings, 15(17), 3009. https://doi.org/10.3390/buildings15173009

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Influence of Size and Content of Recycled Aggregate on Mechanical Properties of Concrete

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