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This study investigates the incorporation of single-walled carbon nanotubes (SWCNTs) into concrete to enhance its mechanical performance and sustainability. CNTs are known for their exceptional strength, high surface area, and ability to bridge microcracks, which can significantly improve the performance of cementitious materials. The research involved the preparation of concrete mixes with varying CNT dosages (0.075%, 0.1%, and 0.2% by weight of cement), followed by compressive strength, split tensile strength, and flexural strength tests, conducted as per Indian Standard specifications. The results demonstrated that the inclusion of CNTs enhanced compressive strength by up to 14.8% and split tensile strength by 30% compared to conventional M40 concrete. Furthermore, water permeability and absorption were significantly reduced, indicating improved durability. A simplified environmental analysis suggests potential reductions in cement demand and construction waste, supporting long-term sustainability goals. The findings highlight that even low CNT dosages can produce noTable improvements in strength and durability while offering environmental benefits, positioning CNT-reinforced concrete as a viable solution for high-performance and sustainable construction applications.

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Experimental Investigation of Sustainable Concrete Using Carbon Nanotubes

  • 会议论文

  • 发表日期：

    2025年

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  • B. Priyadharshini,
  • R. Nirmala,
  • P. Eshanthini,
  • M. Balaji,
  • Varadhan Naga Sai

摘要

This study investigates the incorporation of single-walled carbon nanotubes (SWCNTs) into concrete to enhance its mechanical performance and sustainability. CNTs are known for their exceptional strength, high surface area, and ability to bridge microcracks, which can significantly improve the performance of cementitious materials. The research involved the preparation of concrete mixes with varying CNT dosages (0.075%, 0.1%, and 0.2% by weight of cement), followed by compressive strength, split tensile strength, and flexural strength tests, conducted as per Indian Standard specifications. The results demonstrated that the inclusion of CNTs enhanced compressive strength by up to 14.8% and split tensile strength by 30% compared to conventional M40 concrete. Furthermore, water permeability and absorption were significantly reduced, indicating improved durability. A simplified environmental analysis suggests potential reductions in cement demand and construction waste, supporting long-term sustainability goals. The findings highlight that even low CNT dosages can produce noTable improvements in strength and durability while offering environmental benefits, positioning CNT-reinforced concrete as a viable solution for high-performance and sustainable construction applications.