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Synergistic Effect of Micro-Silica and Recycled Tyre Steel Fiber on the Properties of High-Performance Recycled Aggregate Concrete

Author

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  • Muhammad Talha Amir

    (Department of Civil Engineering, University of Engineering and Technology, Taxila 47050, Pakistan
    House of Property and Entrepreneurship (HOPE), Wallayat Complex, Plaza 74, Phase 7 Bahria Town, Islamabad 46000, Pakistan)

  • Sobia Riaz

    (Department of Civil Engineering, Faculty of Engineering, Bahauddin Zakariya University, Multan 66000, Pakistan)

  • Hawreen Ahmed

    (Department of Highway and Bridge Engineering, Technical Engineering College, Erbil Polytechnic University, Erbil 44001, Iraq
    Department of Civil Engineering, College of Engineering, Nawroz University, Duhok 42001, Iraq)

  • Syed Safdar Raza

    (Department of Civil Engineering, Faculty of Engineering, Bahauddin Zakariya University, Multan 66000, Pakistan)

  • Ahmed Ali A. Shohan

    (Architecture & Planning Department, College of Engineering, King Khalid University (KKU), Abha 61411, Saudi Arabia)

  • Saleh Alsulamy

    (Architecture & Planning Department, College of Engineering, King Khalid University (KKU), Abha 61411, Saudi Arabia)

Abstract

The present research investigates the mechanical and physical properties of recycled aggregate concrete (RAC) modified with micro-silica (MS) and recycled tire steel fiber (RTSF). Natural coarse aggregates (NCA) were completely replaced by recycled coarse aggregates (RCA) to prepare RAC. High-strength RAC mixes were prepared by replacing 5% and 10% of Portland cement with MS. With each level of MS, RTSF was incorporated as 0%, 0.5%, 1 and 2% by volume fraction. In addition to mechanical properties, ultrasonic pulse velocity (UPV), electrical resistivity (ER), and water absorption (WA) of the mixes were also evaluated. The performance of modified RAC mixtures was also compared with plain natural aggregate concrete (PNAC). The experimental investigation revealed that RTSF substantially increased the tensile strength of RAC, whereas MS improved the durability of RTSF-reinforced RAC. RAC made with 1% RTSF and 10% MS showed 54% more splitting-tensile strength compared to the PNAC. The WA capacity of RAC incorporating 10% MS was 15–22% lower than that of the PNAC.

Suggested Citation

  • Muhammad Talha Amir & Sobia Riaz & Hawreen Ahmed & Syed Safdar Raza & Ahmed Ali A. Shohan & Saleh Alsulamy, 2023. "Synergistic Effect of Micro-Silica and Recycled Tyre Steel Fiber on the Properties of High-Performance Recycled Aggregate Concrete," Sustainability, MDPI, vol. 15(11), pages 1-16, May.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:11:p:8642-:d:1156552
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    References listed on IDEAS

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    1. Lei Wang & Fanxing Guo & Huamei Yang & Yan Wang & Shengwen Tang, 2021. "Comparison Of Fly Ash, Pva Fiber, Mgo And Shrinkage-Reducing Admixture On The Frost Resistance Of Face Slab Concrete Via Pore Structural And Fractal Analysis," FRACTALS (fractals), World Scientific Publishing Co. Pte. Ltd., vol. 29(02), pages 1-18, March.
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