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<p>The purpose of this study is to explore the potential of using waste tire rubber ash (TRA) as a substitute for a portion of cement in structural concrete. In this research, five different mixing designs were selected, varying the percentage of TRA replacing cement. The percentages included 0% (control concrete), 2.5%, 5.0%, 7.5%, and 10.0%. The results from tests conducted on reinforced concrete beam samples containing 10% rubber ash were compared with those of the control samples. The findings indicated that the compressive strength increased by up to 18%, while the bending strength improved by up to 14%. Additionally, the monotonic behavior of the reinforced concrete beams demonstrated significant enhancement. Cyclic tests on the reinforced concrete samples with 10% TRA substitution revealed an increase in energy dissipation capacity of up to 23% and an improvement in the viscous damping ratio of up to 16%. These studies suggest that replacing certain amounts of TRA with cement can enhance the performance of concrete.</p>

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Experimental study of mechanical behavior of reinforced concrete beams containing waste tire rubber ash

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Hamid Nikkhah,
  • Hamidreza Tavakoli

摘要

The purpose of this study is to explore the potential of using waste tire rubber ash (TRA) as a substitute for a portion of cement in structural concrete. In this research, five different mixing designs were selected, varying the percentage of TRA replacing cement. The percentages included 0% (control concrete), 2.5%, 5.0%, 7.5%, and 10.0%. The results from tests conducted on reinforced concrete beam samples containing 10% rubber ash were compared with those of the control samples. The findings indicated that the compressive strength increased by up to 18%, while the bending strength improved by up to 14%. Additionally, the monotonic behavior of the reinforced concrete beams demonstrated significant enhancement. Cyclic tests on the reinforced concrete samples with 10% TRA substitution revealed an increase in energy dissipation capacity of up to 23% and an improvement in the viscous damping ratio of up to 16%. These studies suggest that replacing certain amounts of TRA with cement can enhance the performance of concrete.