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Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge

Author

Listed:
  • Xiaoya Bian

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China)

  • Haodong Yang

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China)

  • Jiale Chen

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China)

  • Hui Liu

    (Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Xuyong Chen

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China)

Abstract

In this study, waste concrete fine aggregates and cement are applied to sludge solidification and resource recycling. The unconfined compressive strength (UCS) test is performed to investigate the variation in the strength and stress–strain properties of the solidified sludge with the content and particle size of waste concrete fine aggregate, cement content, and curing time. The results show that incorporating waste concrete fine aggregates can improve the UCS of cement-solidified sludge, which can achieve the optimum effect when the fine aggregate content ranges from 12% to 15%. However, compared with the fine aggregate content, the cement content and curing time are the main factors in improving the strength of waste concrete fine aggregate and cement-solidified sludge (WCSS). The stress–strain curves of WCSS comprise four stages. The failure strain ε f of WCSS with four fine aggregate contents decreases in a power function with the increase in q u , and ε f is mostly distributed when the content is 1.1–2.1%. A linear relationship is observed between E 50 and q u . This study attempts to promote the recycling of waste concrete fine aggregates and obtain solidified sludge with excellent mechanical properties, providing some reference for practical engineering applications.

Suggested Citation

  • Xiaoya Bian & Haodong Yang & Jiale Chen & Hui Liu & Xuyong Chen, 2022. "Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge," Sustainability, MDPI, vol. 14(19), pages 1-16, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:19:p:12217-:d:925946
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    References listed on IDEAS

    as
    1. Norshakila Abdul Wahab & Mohammad Jawed Roshan & Ahmad Safuan A. Rashid & Muhammad Azril Hezmi & Siti Norafida Jusoh & Nik Daud Nik Norsyahariati & Sakina Tamassoki, 2021. "Strength and Durability of Cement-Treated Lateritic Soil," Sustainability, MDPI, vol. 13(11), pages 1-23, June.
    2. Syed Kamran Hussain Shah & Taro Uchimura & Ken Kawamoto, 2022. "Permanent Deformation and Breakage Response of Recycled Concrete Aggregates under Cyclic Loading Subject to Moisture Change," Sustainability, MDPI, vol. 14(9), pages 1-17, April.
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