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<p>In this study, we examine the behavior of the compressive strength and thermal conductivity of a typical mixture of plain concrete. We performed a concrete curing and measured the compressive strength at 7, 14, and 28&#xa0;days. We prepared the concrete through three different compositions: (a) plain concrete, (b) substituting 10% of sand with graphite and (c) substituting 10% of sand with a mixture of graphite and zeolite. By the end of the 28&#xa0;days, both plain concrete and the one modified with graphite reached similar values, while the mixture with graphite–zeolite increased 12% relative to plain concrete. With respect to thermal conductivity, we observed that the concrete modified with graphite rose by 5%, while graphite–zeolite concrete decreased by 14%. In addition, we characterized the concrete samples with XPS and SEM. The results show that the combined use of graphite and zeolite as partial sand replacements improves both the mechanical integrity of concrete and its insulator ability.</p>

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Enhanced Compressive Strength and Reduced Thermal Conductivity in Concrete Using a 10% Graphite–Zeolite Sand Replacement

  • 期刊论文

  • 发表日期：

    2025年11月13日

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  • E. Pineda-León,
  • H. A. Pineda-León,
  • A. B. López-Oyama,
  • A. C. Borbón-Almada,
  • A. de Leon,
  • R. Ochoa-Landín,
  • M. A. García-Bojórquez,
  • E. G. Zamorano-Noriega,
  • S. J. Castillo

摘要

In this study, we examine the behavior of the compressive strength and thermal conductivity of a typical mixture of plain concrete. We performed a concrete curing and measured the compressive strength at 7, 14, and 28 days. We prepared the concrete through three different compositions: (a) plain concrete, (b) substituting 10% of sand with graphite and (c) substituting 10% of sand with a mixture of graphite and zeolite. By the end of the 28 days, both plain concrete and the one modified with graphite reached similar values, while the mixture with graphite–zeolite increased 12% relative to plain concrete. With respect to thermal conductivity, we observed that the concrete modified with graphite rose by 5%, while graphite–zeolite concrete decreased by 14%. In addition, we characterized the concrete samples with XPS and SEM. The results show that the combined use of graphite and zeolite as partial sand replacements improves both the mechanical integrity of concrete and its insulator ability.