Innovation Series: Advanced Science (ISSN 2938-9933)

Applicability Evaluation of Mixed Waste Aggregates Based on Geotechnical Tests

Shuai Wang^1,2, Yilong Cui¹, Xianwei Zhang³, Ruhao Zhang⁴, Qinglei Xiao⁴, JianQing Zhang⁴, Haoran Zou⁴

¹ Wuhan Construction Group Co., Ltd., Wuhan 430056, China

² School of Civil Engineering and Architecture, Wuhan University, Wuhan 430072, China

³ School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China

⁴ College of Intelligent Construction, Wuchang University of Technology, Wuhan 430223, China

Abstract: In response to issues such as the low recycling rate of mixed waste aggregates and the insufficient performance evaluation system in China’s urbanization process, this study takes multi-shaped mixed recycled aggregates, classified into 10-20 mm and 20-40 mm gradations after crushing, as the research subject. A systematic geotechnical testing program was conducted to evaluate their applicability. The classification method for mixed waste aggregates was optimized, and key engineering performance indicators-including density, water absorption and release, fractal dimension, and particle strength-were tested. Based on these, an engineering applicability evaluation system for mixed waste aggregates was established. The study found that the 10-20 mm particle group exhibits higher water absorption than the 20-40 mm group, while elongated aggregates show higher single-particle strength, and flaky aggregates demonstrate lower strength. The established multi-criteria evaluation system provides a reference for the engineering application of waste aggregates in scenarios such as backfilling projects and concrete preparation.

Keywords: Mixed Waste Aggregates; Applicability Evaluation; Engineering Performance Indicators; Geotechnical Tests

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