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<p>The pozzolanic qualities of fly ash, a byproduct of burning coal, increases the strength and longevity of concrete. Concrete can benefit from the addition of graphene oxide (GO), a nanoscale substance with remarkable reinforcing properties that increase structural integrity and crack resistance. The flexural behavior of reinforced concrete (RC) beams with 20% fly ash and 0.08% graphene oxide was examined in this study, with particular attention to how the beams behave at room temperature and at a higher temperature (200&#xa0;°C). Graphene oxide, which has nanoscale reinforcing qualities, offers crack resistance and better load-bearing capacity. Fly ash, a pozzolanic ingredient, improves the morphology of concrete, making it more workable and stronger. Experimental and analytical studies were conducted to evaluate the stiffness, failure modes, crack patterns, and load-deflection behavior under both conditions. Compared with regular concrete, the combination of fly ash and graphene oxide significantly increased the strength, stiffness, and crack resistance at room temperature. This combination performed better than fly ash alone or plain concrete at 200&#xa0;°C, exhibited improved stiffness retention, decreased crack width, and increased thermal stability. The findings demonstrate how well fly ash along with graphene oxide work to increase the flexural characteristics and longevity of RC beams at both normal and high temperatures.</p>

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Investigating the synergistic effects of fly ash and graphene oxide on the flexural behaviour of reinforced concrete beams under elevated temperature

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • I. Ramana,
  • N. Parthasarathi

摘要

The pozzolanic qualities of fly ash, a byproduct of burning coal, increases the strength and longevity of concrete. Concrete can benefit from the addition of graphene oxide (GO), a nanoscale substance with remarkable reinforcing properties that increase structural integrity and crack resistance. The flexural behavior of reinforced concrete (RC) beams with 20% fly ash and 0.08% graphene oxide was examined in this study, with particular attention to how the beams behave at room temperature and at a higher temperature (200 °C). Graphene oxide, which has nanoscale reinforcing qualities, offers crack resistance and better load-bearing capacity. Fly ash, a pozzolanic ingredient, improves the morphology of concrete, making it more workable and stronger. Experimental and analytical studies were conducted to evaluate the stiffness, failure modes, crack patterns, and load-deflection behavior under both conditions. Compared with regular concrete, the combination of fly ash and graphene oxide significantly increased the strength, stiffness, and crack resistance at room temperature. This combination performed better than fly ash alone or plain concrete at 200 °C, exhibited improved stiffness retention, decreased crack width, and increased thermal stability. The findings demonstrate how well fly ash along with graphene oxide work to increase the flexural characteristics and longevity of RC beams at both normal and high temperatures.